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annotate touchTest/touchTest.c @ 4685:e0c3b09368a6

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Fixed Dollar Recognition.
author Jim Grandpre <jim.tla@gmail.com>
date Sat, 07 Aug 2010 11:32:11 -0400
parents 3c4e0130c9b1
children
rev   line source
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1 #include <stdio.h>
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2 #include <SDL.h>
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3 #include <math.h>
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4 #include <SDL_touch.h>
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5
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6
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7
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8 #define PI 3.1415926535897
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9 #define WIDTH 640
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10 #define HEIGHT 480
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11 #define BPP 4
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12 #define DEPTH 32
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13
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14 #define MAXFINGERS 5
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15
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16 int mousx,mousy;
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17 int keystat[512];
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18 int bstatus;
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19
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20
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21
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22
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23 typedef struct {
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24 float x,y;
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25 } Point;
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26
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27 typedef struct {
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28 Point p;
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29 float pressure;
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30 } Finger;
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31
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32
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33 Finger finger[MAXFINGERS];
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34
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35 void handler (int sig)
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36 {
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37 printf ("exiting...(%d)\n", sig);
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38 exit (0);
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39 }
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40
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41 void perror_exit (char *error)
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42 {
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43 perror (error);
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44 handler (9);
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45 }
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47
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48 void setpix(SDL_Surface *screen, int x, int y, int col)
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49 {
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50 Uint32 *pixmem32;
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51 Uint32 colour;
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52
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53 if((unsigned)x > screen->w) return;
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54 if((unsigned)y > screen->h) return;
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55
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56 colour = SDL_MapRGB( screen->format, (col>>16)&0xFF, (col>>8)&0xFF, col&0xFF);
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57
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58 pixmem32 = (Uint32*) screen->pixels + y*screen->pitch/screen->format->BytesPerPixel + x; //TODO : Check this. May cause crash.
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59 *pixmem32 = colour;
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60 }
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61
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62 void drawCircle(SDL_Surface* screen,int x,int y,int r,int c)
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63 {
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64
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65 float a;
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66 int tx;
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67 for(a=0;a<PI/2;a+=1.f/(float)abs(r))
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68 {
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69 if(r > 0) { //r<0 ==> unfilled circle
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70 for(tx=x-r*cos(a);tx<x+r*cos(a);tx++) {
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71 setpix(screen,tx,(int)(y+r*sin(a)),c);
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72 setpix(screen,tx,(int)(y-r*sin(a)),c);
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73 }
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74 }
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75
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76 //Always Draw Outline
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77 setpix(screen,(int)(x+r*cos(a)),(int)(y+r*sin(a)),c);
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78 setpix(screen,(int)(x-r*cos(a)),(int)(y+r*sin(a)),c);
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79 setpix(screen,(int)(x+r*cos(a)),(int)(y-r*sin(a)),c);
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80 setpix(screen,(int)(x-r*cos(a)),(int)(y-r*sin(a)),c);
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81 }
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82 }
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83
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84 void DrawScreen(SDL_Surface* screen, int h)
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85 {
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86 int x, y, xm,ym,c,i;
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87 if(SDL_MUSTLOCK(screen))
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88 {
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89 if(SDL_LockSurface(screen) < 0) return;
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90 }
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91 for(y = 0; y < screen->h; y++ )
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92 {
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93 for( x = 0; x < screen->w; x++ )
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94 {
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95 //setpixel(screen, x, y, (x*x)/256+3*y+h, (y*y)/256+x+h, h);
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96 //xm = (x+h)%screen->w;
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97 //ym = (y+h)%screen->w;
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98 //c = sin(h/256*2*PI)*x*y/screen->w/screen->h;
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99 //setpix(screen,x,y,255*sin(xm/screen->w*2*PI),sin(h/255*2*PI)*255*y/screen->h,c);
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100 setpix(screen,x,y,((x%255)<<16) + ((y%255)<<8) + (x+y)%255);
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101 }
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102 }
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103
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104 drawCircle(screen,mousx,mousy,-30,0xFFFFFF);
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105
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106
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107 for(i=0;i<MAXFINGERS;i++)
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108 if(finger[i].p.x >= 0 && finger[i].p.y >= 0)
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109 if(finger[i].pressure > 0)
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110 drawCircle(screen,finger[i].p.x*screen->w,finger[i].p.y*screen->h
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111 ,20,0xFF*finger[i].pressure);
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112 else
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113 drawCircle(screen,finger[i].p.x*screen->w,finger[i].p.y*screen->h
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114 ,20,0xFF);
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115
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116 if(SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen);
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117
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118 SDL_Flip(screen);
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119 }
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120
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121 SDL_Surface* initScreen(int width,int height)
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122 {
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123 return SDL_SetVideoMode(width, height, DEPTH,
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124 SDL_HWSURFACE | SDL_RESIZABLE);
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125 }
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126
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127 int main(int argc, char* argv[])
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128 {
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129 SDL_Surface *screen;
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130 SDL_Event event;
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131
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132 int keypress = 0;
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133 int h=0,s=1,i,j;
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134
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135 memset(keystat,0,512*sizeof(keystat[0]));
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136 if (SDL_Init(SDL_INIT_VIDEO) < 0 ) return 1;
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137 screen = initScreen(WIDTH,HEIGHT);
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138 if (!screen)
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139 {
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140 SDL_Quit();
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141 return 1;
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142 }
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143
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144 while(!keystat[27]) {
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145 //Poll SDL
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146 while(SDL_PollEvent(&event))
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147 {
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148 switch (event.type)
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149 {
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150 case SDL_QUIT:
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151 keystat[27] = 1;
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152 break;
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153 case SDL_KEYDOWN:
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154 //printf("%i\n",event.key.keysym.sym);
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155 keystat[event.key.keysym.sym] = 1;
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156 //keypress = 1;
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157 break;
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158 case SDL_KEYUP:
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159 //printf("%i\n",event.key.keysym.sym);
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160 keystat[event.key.keysym.sym] = 0;
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161 //keypress = 1;
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162 break;
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163 case SDL_VIDEORESIZE:
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164 if (!(screen = initScreen(event.resize.w,
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165 event.resize.h)))
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166 {
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167 SDL_Quit();
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168 return 1;
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169 }
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170 break;
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171 case SDL_MOUSEMOTION:
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172 mousx = event.motion.x;
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173 mousy = event.motion.y;
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174 break;
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175 case SDL_MOUSEBUTTONDOWN:
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176 bstatus |= (1<<(event.button.button-1));
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177 break;
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178 case SDL_MOUSEBUTTONUP:
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179 bstatus &= ~(1<<(event.button.button-1));
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180 break;
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181 case SDL_FINGERMOTION:
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182 ;
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183 //printf("Finger: %i,x: %i, y: %i\n",event.tfinger.fingerId,
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184 // event.tfinger.x,event.tfinger.y);
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185 //SDL_Touch *inTouch = SDL_GetTouch(event.tfinger.touchId);
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186 //SDL_Finger *inFinger = SDL_GetFinger(inTouch,event.tfinger.fingerId);
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187 /*
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188 finger[event.tfinger.fingerId].p.x = ((float)event.tfinger.x)/
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189 inTouch->xres;
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190 finger[event.tfinger.fingerId].p.y = ((float)event.tfinger.y)/
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191 inTouch->yres;
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192
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193 finger[event.tfinger.fingerId].pressure =
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194 ((float)event.tfinger.pressure)/inTouch->pressureres;*/
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195 /*
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196 printf("Finger: %i, Pressure: %f Pressureres: %i\n",
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197 event.tfinger.fingerId,
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198 finger[event.tfinger.fingerId].pressure,
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199 inTouch->pressureres);
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200 */
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201 //printf("Finger: %i, pressure: %f\n",event.tfinger.fingerId,
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202 // finger[event.tfinger.fingerId].pressure);
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203
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204
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205 break;
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206 case SDL_FINGERDOWN:
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207 printf("Figner: %i down - x: %i, y: %i\n",event.tfinger.fingerId,
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208 event.tfinger.x,event.tfinger.y);
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209 finger[event.tfinger.fingerId].p.x = event.tfinger.x;
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210 finger[event.tfinger.fingerId].p.y = event.tfinger.y;
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211 break;
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212 case SDL_FINGERUP:
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213 printf("Figner: %i up - x: %i, y: %i\n",event.tfinger.fingerId,
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214 event.tfinger.x,event.tfinger.y);
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215 finger[event.tfinger.fingerId].p.x = -1;
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216 finger[event.tfinger.fingerId].p.y = -1;
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217 break;
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218 }
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219 }
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220 //And draw
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221 DrawScreen(screen,h);
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222 printf("Things\n");
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223 /*
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224 for(i=0;i<512;i++)
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225 if(keystat[i]) printf("%i\n",i);
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226 printf("Buttons:%i\n",bstatus);
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227 */
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228 }
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229 SDL_Quit();
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230
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231 return 0;
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232 }