sdl-ios-xcode: src/events/SDL

annotate src/events/SDL_gesture.c @ 4658:454385d76845

Moved $1 Gestures into the SDL Library

author	Jim Grandpre <jim.tla@gmail.com>
date	Fri, 09 Jul 2010 00:50:40 -0700
parents	eed063a0bf5b
children	063b9455bd1a

rev	line source
4657 eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	1 /*
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	2 SDL - Simple DirectMedia Layer
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	3 Copyright (C) 1997-2010 Sam Lantinga
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	4
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	5 This library is free software; you can redistribute it and/or
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	6 modify it under the terms of the GNU Lesser General Public
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	7 License as published by the Free Software Foundation; either
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	8 version 2.1 of the License, or (at your option) any later version.
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	9
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	10 This library is distributed in the hope that it will be useful,
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	11 but WITHOUT ANY WARRANTY; without even the implied warranty of
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	13 Lesser General Public License for more details.
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	14
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	15 You should have received a copy of the GNU Lesser General Public
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	16 License along with this library; if not, write to the Free Software
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	18
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	19 Sam Lantinga
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	20 slouken@libsdl.org
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	21 */
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	22 #include "SDL_config.h"
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	23
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	24 /* General mouse handling code for SDL */
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	25
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	26 #include "SDL_events.h"
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	27 #include "SDL_events_c.h"
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	28 #include "SDL_gesture_c.h"
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	29
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	30 //TODO: Replace with malloc
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	31 #define MAXFINGERS 3
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	32 #define MAXTOUCHES 2
4658 454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	33 #define MAXTEMPLATES 4
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	34 #define MAXPATHSIZE 1024
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	35
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	36 #define DOLLARNPOINTS 64
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	37 #define DOLLARSIZE 256
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	38
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	39 //PHI = ((sqrt(5)-1)/2)
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	40 #define PHI 0.618033989
4657 eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	41
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	42 typedef struct {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	43 float x,y;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	44 } Point;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	45
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	46
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	47 typedef struct {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	48 Point p;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	49 float pressure;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	50 int id;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	51 } Finger;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	52
4658 454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	53
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	54 typedef struct {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	55 float length;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	56
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	57 int numPoints;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	58 Point p[MAXPATHSIZE];
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	59 } DollarPath;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	60
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	61
4657 eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	62 typedef struct {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	63 Finger f;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	64 Point cv;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	65 float dtheta,dDist;
4658 454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	66 DollarPath dollarPath;
4657 eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	67 } TouchPoint;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	68
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	69
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	70 typedef struct {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	71 int id;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	72 Point res;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	73 Point centroid;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	74 TouchPoint gestureLast[MAXFINGERS];
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	75 int numDownFingers;
4658 454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	76
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	77 int numDollarTemplates;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	78 Point dollarTemplate[MAXTEMPLATES][DOLLARNPOINTS];
4657 eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	79 } GestureTouch;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	80
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	81 GestureTouch gestureTouch[MAXTOUCHES];
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	82 int numGestureTouches = 0;
4658 454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	83
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	84 float dollarDifference(Point* points,Point* templ,float ang) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	85 // Point p[DOLLARNPOINTS];
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	86 float dist = 0;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	87 Point p;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	88 int i;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	89 for(i = 0; i < DOLLARNPOINTS; i++) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	90 p.x = points[i].x * cos(ang) - points[i].y * sin(ang);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	91 p.y = points[i].x * sin(ang) + points[i].y * cos(ang);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	92 dist += sqrt((p.x-templ[i].x)*(p.x-templ[i].x)+
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	93 (p.y-templ[i].y)*(p.y-templ[i].y));
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	94 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	95 return dist/DOLLARNPOINTS;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	96
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	97 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	98
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	99 float bestDollarDifference(Point* points,Point* templ) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	100 //------------BEGIN DOLLAR BLACKBOX----------------//
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	101 //-TRANSLATED DIRECTLY FROM PSUDEO-CODE AVAILABLE AT-//
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	102 //-"http://depts.washington.edu/aimgroup/proj/dollar/"-//
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	103 float ta = -M_PI/4;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	104 float tb = M_PI/4;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	105 float dt = M_PI/90;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	106 float x1 = PHIta + (1-PHI)tb;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	107 float f1 = dollarDifference(points,templ,x1);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	108 float x2 = (1-PHI)ta + PHItb;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	109 float f2 = dollarDifference(points,templ,x2);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	110 while(abs(ta-tb) > dt) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	111 if(f1 < f2) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	112 tb = x2;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	113 x2 = x1;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	114 f2 = f1;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	115 x1 = PHIta + (1-PHI)tb;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	116 f1 = dollarDifference(points,templ,x1);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	117 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	118 else {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	119 ta = x1;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	120 x1 = x2;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	121 f1 = f2;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	122 x2 = (1-PHI)ta + PHItb;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	123 f2 = dollarDifference(points,templ,x2);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	124 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	125 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	126 /*
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	127 if(f1 <= f2)
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	128 printf("Min angle (x1): %f\n",x1);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	129 else if(f1 > f2)
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	130 printf("Min angle (x2): %f\n",x2);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	131 */
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	132 return SDL_min(f1,f2);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	133 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	134
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	135 float dollarRecognize(DollarPath path,int bestTempl,GestureTouch touch) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	136
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	137 Point points[DOLLARNPOINTS];
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	138 int numPoints = dollarNormalize(path,points);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	139 int i;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	140
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	141 int bestDiff = 10000;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	142 *bestTempl = -1;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	143 for(i = 0;i < touch->numDollarTemplates;i++) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	144 int diff = bestDollarDifference(points,touch->dollarTemplate[i]);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	145 if(diff < bestDiff) {bestDiff = diff; *bestTempl = i;}
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	146 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	147 return bestDiff;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	148 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	149
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	150 //DollarPath contains raw points, plus (possibly) the calculated length
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	151 int dollarNormalize(DollarPath path,Point *points) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	152 int i;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	153 //Calculate length if it hasn't already been done
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	154 if(path.length <= 0) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	155 for(i=1;i<path.numPoints;i++) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	156 float dx = path.p[i ].x -
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	157 path.p[i-1].x;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	158 float dy = path.p[i ].y -
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	159 path.p[i-1].y;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	160 path.length += sqrt(dxdx+dydy);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	161 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	162 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	163
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	164
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	165 //Resample
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	166 float interval = path.length/(DOLLARNPOINTS - 1);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	167 float dist = 0;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	168
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	169 int numPoints = 0;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	170 Point centroid; centroid.x = 0;centroid.y = 0;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	171 //printf("(%f,%f)\n",path.p[path.numPoints-1].x,path.p[path.numPoints-1].y);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	172 for(i = 1;i < path.numPoints;i++) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	173 float d = sqrt((path.p[i-1].x-path.p[i].x)*(path.p[i-1].x-path.p[i].x)+
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	174 (path.p[i-1].y-path.p[i].y)*(path.p[i-1].y-path.p[i].y));
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	175 //printf("d = %f dist = %f/%f\n",d,dist,interval);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	176 while(dist + d > interval) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	177 points[numPoints].x = path.p[i-1].x +
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	178 ((interval-dist)/d)*(path.p[i].x-path.p[i-1].x);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	179 points[numPoints].y = path.p[i-1].y +
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	180 ((interval-dist)/d)*(path.p[i].y-path.p[i-1].y);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	181 centroid.x += points[numPoints].x;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	182 centroid.y += points[numPoints].y;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	183 numPoints++;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	184
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	185 dist -= interval;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	186 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	187 dist += d;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	188 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	189 if(numPoints < 1) return 0;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	190 centroid.x /= numPoints;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	191 centroid.y /= numPoints;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	192
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	193 //printf("Centroid (%f,%f)",centroid.x,centroid.y);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	194 //Rotate Points so point 0 is left of centroid and solve for the bounding box
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	195 float xmin,xmax,ymin,ymax;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	196 xmin = centroid.x;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	197 xmax = centroid.x;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	198 ymin = centroid.y;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	199 ymax = centroid.y;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	200
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	201 float ang = atan2(centroid.y - points[0].y,
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	202 centroid.x - points[0].x);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	203
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	204 for(i = 0;i<numPoints;i++) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	205 float px = points[i].x;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	206 float py = points[i].y;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	207 points[i].x = (px - centroid.x)*cos(ang) -
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	208 (py - centroid.y)*sin(ang) + centroid.x;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	209 points[i].y = (px - centroid.x)*sin(ang) +
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	210 (py - centroid.y)*cos(ang) + centroid.y;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	211
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	212
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	213 if(points[i].x < xmin) xmin = points[i].x;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	214 if(points[i].x > xmax) xmax = points[i].x;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	215 if(points[i].y < ymin) ymin = points[i].y;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	216 if(points[i].y > ymax) ymax = points[i].y;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	217 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	218
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	219 //Scale points to DOLLARSIZE, and translate to the origin
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	220 float w = xmax-xmin;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	221 float h = ymax-ymin;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	222
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	223 for(i=0;i<numPoints;i++) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	224 points[i].x = (points[i].x - centroid.x)*DOLLARSIZE/w;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	225 points[i].y = (points[i].y - centroid.y)*DOLLARSIZE/h;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	226 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	227 return numPoints;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	228 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	229
4657 eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	230 int SDL_GestureAddTouch(SDL_Touch* touch) {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	231 if(numGestureTouches >= MAXTOUCHES) return -1;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	232
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	233 gestureTouch[numGestureTouches].res.x = touch->xres;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	234 gestureTouch[numGestureTouches].res.y = touch->yres;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	235 gestureTouch[numGestureTouches].numDownFingers = 0;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	236
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	237 gestureTouch[numGestureTouches].res.x = touch->xres;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	238 gestureTouch[numGestureTouches].id = touch->id;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	239
4658 454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	240 gestureTouch[numGestureTouches].numDollarTemplates = 0;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	241
4657 eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	242 numGestureTouches++;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	243 return 0;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	244 }
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	245
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	246 GestureTouch * SDL_GetGestureTouch(int id) {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	247 int i;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	248 for(i = 0;i < numGestureTouches; i++) {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	249 //printf("%i ?= %i\n",gestureTouch[i].id,id);
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	250 if(gestureTouch[i].id == id) return &gestureTouch[i];
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	251 }
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	252 return NULL;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	253 }
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	254
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	255 int SDL_SendGestureMulti(GestureTouch* touch,float dTheta,float dDist) {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	256 SDL_Event event;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	257 event.mgesture.type = SDL_MULTIGESTURE;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	258 event.mgesture.touchId = touch->id;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	259 event.mgesture.x = touch->centroid.x;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	260 event.mgesture.y = touch->centroid.y;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	261 event.mgesture.dTheta = dTheta;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	262 event.mgesture.dDist = dDist;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	263 return SDL_PushEvent(&event) > 0;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	264 }
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	265
4658 454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	266 int SDL_SendGestureDollar(GestureTouch* touch,int gestureId,float error) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	267 SDL_Event event;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	268 event.dgesture.type = SDL_DOLLARGESTURE;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	269 event.dgesture.touchId = touch->id;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	270 /*
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	271 //TODO: Add this to give location of gesture?
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	272 event.mgesture.x = touch->centroid.x;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	273 event.mgesture.y = touch->centroid.y;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	274 */
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	275 event.dgesture.gestureId = gestureId;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	276 event.dgesture.error = error;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	277 return SDL_PushEvent(&event) > 0;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	278 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	279
4657 eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	280 void SDL_GestureProcessEvent(SDL_Event* event)
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	281 {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	282 if(event->type == SDL_FINGERMOTION \|\|
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	283 event->type == SDL_FINGERDOWN \|\|
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	284 event->type == SDL_FINGERUP) {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	285 GestureTouch* inTouch = SDL_GetGestureTouch(event->tfinger.touchId);
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	286
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	287 //Shouldn't be possible
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	288 if(inTouch == NULL) return;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	289
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	290
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	291 float x = ((float)event->tfinger.x)/inTouch->res.x;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	292 float y = ((float)event->tfinger.y)/inTouch->res.y;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	293 int j,empty = -1;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	294
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	295 for(j = 0;j<inTouch->numDownFingers;j++) {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	296 if(inTouch->gestureLast[j].f.id != event->tfinger.fingerId) continue;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	297
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	298 if(event->type == SDL_FINGERUP) {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	299 inTouch->numDownFingers--;
4658 454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	300
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	301 int bestTempl;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	302 float error;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	303 error = dollarRecognize(inTouch->gestureLast[j].dollarPath,
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	304 &bestTempl,inTouch);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	305 if(bestTempl >= 0){
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	306 //Send Event
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	307 int gestureId = 0; //?
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	308 SDL_SendGestureDollar(inTouch->id,gestureId,error);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	309
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	310
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	311 printf("Dollar error: %f\n",error);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	312 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	313
4657 eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	314 inTouch->gestureLast[j] = inTouch->gestureLast[inTouch->numDownFingers];
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	315 break;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	316 }
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	317 else {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	318 float dx = x - inTouch->gestureLast[j].f.p.x;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	319 float dy = y - inTouch->gestureLast[j].f.p.y;
4658 454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	320 DollarPath* path = &inTouch->gestureLast[j].dollarPath;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	321 if(path->numPoints < MAXPATHSIZE) {
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	322 path->p[path->numPoints].x = x;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	323 path->p[path->numPoints].y = y;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	324 path->length += sqrt(dxdx + dydy);
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	325 path->numPoints++;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	326 }
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	327
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	328
4657 eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	329 inTouch->centroid.x += dx/inTouch->numDownFingers;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	330 inTouch->centroid.y += dy/inTouch->numDownFingers;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	331 if(inTouch->numDownFingers > 1) {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	332 Point lv; //Vector from centroid to last x,y position
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	333 Point v; //Vector from centroid to current x,y position
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	334 lv = inTouch->gestureLast[j].cv;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	335 float lDist = sqrt(lv.xlv.x + lv.ylv.y);
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	336 //printf("lDist = %f\n",lDist);
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	337 v.x = x - inTouch->centroid.x;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	338 v.y = y - inTouch->centroid.y;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	339 inTouch->gestureLast[j].cv = v;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	340 float Dist = sqrt(v.xv.x+v.yv.y);
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	341 // cos(dTheta) = (v . lv)/(\|v\| * \|lv\|)
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	342
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	343 //Normalize Vectors to simplify angle calculation
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	344 lv.x/=lDist;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	345 lv.y/=lDist;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	346 v.x/=Dist;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	347 v.y/=Dist;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	348 float dtheta = atan2(lv.xv.y - lv.yv.x,lv.xv.x + lv.yv.y);
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	349
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	350 float dDist = (Dist - lDist);
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	351 if(lDist == 0) {dDist = 0;dtheta = 0;} //To avoid impossible values
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	352 inTouch->gestureLast[j].dDist = dDist;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	353 inTouch->gestureLast[j].dtheta = dtheta;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	354
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	355 //printf("dDist = %f, dTheta = %f\n",dDist,dtheta);
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	356 //gdtheta = gdtheta.9 + dtheta.1;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	357 //gdDist = gdDist.9 + dDist.1
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	358 //knob.r += dDist/numDownFingers;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	359 //knob.ang += dtheta;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	360 //printf("thetaSum = %f, distSum = %f\n",gdtheta,gdDist);
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	361 //printf("id: %i dTheta = %f, dDist = %f\n",j,dtheta,dDist);
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	362 SDL_SendGestureMulti(inTouch,dtheta,dDist);
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	363 }
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	364 else {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	365 inTouch->gestureLast[j].dDist = 0;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	366 inTouch->gestureLast[j].dtheta = 0;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	367 inTouch->gestureLast[j].cv.x = 0;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	368 inTouch->gestureLast[j].cv.y = 0;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	369 }
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	370 inTouch->gestureLast[j].f.p.x = x;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	371 inTouch->gestureLast[j].f.p.y = y;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	372 break;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	373 //pressure?
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	374 }
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	375 }
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	376
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	377 if(j == inTouch->numDownFingers) {
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	378 //printf("Finger Down!!!\n");
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	379 inTouch->numDownFingers++;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	380 inTouch->centroid.x = (inTouch->centroid.x*(inTouch->numDownFingers - 1)+
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	381 x)/inTouch->numDownFingers;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	382 inTouch->centroid.y = (inTouch->centroid.y*(inTouch->numDownFingers - 1)+
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	383 y)/inTouch->numDownFingers;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	384
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	385 inTouch->gestureLast[j].f.id = event->tfinger.fingerId;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	386 inTouch->gestureLast[j].f.p.x = x;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	387 inTouch->gestureLast[j].f.p.y = y;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	388 inTouch->gestureLast[j].cv.x = 0;
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	389 inTouch->gestureLast[j].cv.y = 0;
4658 454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	390
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	391 inTouch->gestureLast[j].dollarPath.length = 0;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	392 inTouch->gestureLast[j].dollarPath.p[0].x = x;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	393 inTouch->gestureLast[j].dollarPath.p[0].y = y;
454385d76845 Moved $1 Gestures into the SDL Library Jim Grandpre <jim.tla@gmail.com> parents: 4657 diff changeset	394 inTouch->gestureLast[j].dollarPath.numPoints = 1;
4657 eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	395 }
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	396 }
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	397 }
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	398
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	399 /* vi: set ts=4 sw=4 expandtab: */
eed063a0bf5b Moved Multi finger gesture recognition into the library. Jim Grandpre <jim.tla@gmail.com> parents: diff changeset	400

Mercurial > sdl-ios-xcode

annotate src/events/SDL_gesture.c @ 4658:454385d76845