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annotate touchTest/touchTest.c @ 4646:eea1bf53effa

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Added include/touch.h Now reading in resolution of touch pad.
author Jim Grandpre <jim.tla@gmail.com>
date Tue, 01 Jun 2010 02:54:33 -0400
parents fb500b3e1717
children 35a80b0791aa
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 #define PI 3.1415926535897
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7 #define WIDTH 640
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8 #define HEIGHT 480
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9 #define BPP 4
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10 #define DEPTH 32
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11
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12 #define MAXFINGERS 3
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13
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14 int mousx,mousy;
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15 int keystat[512];
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16 int bstatus;
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17
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18
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19
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20
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21 typedef struct {
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22 float x,y;
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23 } Point;
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24
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25 typedef struct {
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26 Point p;
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27 float pressure;
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28 } Finger;
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29
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30
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31 Finger finger[MAXFINGERS];
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32
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33 void handler (int sig)
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34 {
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35 printf ("\exiting...(%d)\n", sig);
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36 exit (0);
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37 }
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38
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39 void perror_exit (char *error)
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40 {
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41 perror (error);
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42 handler (9);
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43 }
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44
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45
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46 void setpix(SDL_Surface *screen, int x, int y, int col)
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47 {
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48 Uint32 *pixmem32;
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49 Uint32 colour;
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50
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51 if((unsigned)x > screen->w) return;
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52 if((unsigned)y > screen->h) return;
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53
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54 colour = SDL_MapRGB( screen->format, (col>>16)&0xFF, (col>>8)&0xFF, col&0xFF);
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55
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56 pixmem32 = (Uint32*) screen->pixels + y*screen->pitch/BPP + x;
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57 *pixmem32 = colour;
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58 }
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59
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60 void drawCircle(SDL_Surface* screen,int x,int y,int r,int c)
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61 {
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62
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63 float a;
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64 int tx;
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65 for(a=0;a<PI/2;a+=1.f/(float)abs(r))
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66 {
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67 if(r > 0) { //r<0 ==> unfilled circle
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68 for(tx=x-r*cos(a);tx<x+r*cos(a);tx++) {
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69 setpix(screen,tx,(int)(y+r*sin(a)),c);
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70 setpix(screen,tx,(int)(y-r*sin(a)),c);
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71 }
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72 }
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73
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74 //Always Draw Outline
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75 setpix(screen,(int)(x+r*cos(a)),(int)(y+r*sin(a)),c);
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76 setpix(screen,(int)(x-r*cos(a)),(int)(y+r*sin(a)),c);
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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 }
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80 }
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81
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82 void DrawScreen(SDL_Surface* screen, int h)
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83 {
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84 int x, y, xm,ym,c;
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85 if(SDL_MUSTLOCK(screen))
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86 {
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87 if(SDL_LockSurface(screen) < 0) return;
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88 }
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89 for(y = 0; y < screen->h; y++ )
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90 {
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91 for( x = 0; x < screen->w; x++ )
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92 {
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93 //setpixel(screen, x, y, (x*x)/256+3*y+h, (y*y)/256+x+h, h);
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94 //xm = (x+h)%screen->w;
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95 //ym = (y+h)%screen->w;
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96 //c = sin(h/256*2*PI)*x*y/screen->w/screen->h;
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97 //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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98 setpix(screen,x,y,((x%255)<<16) + ((y%255)<<8) + (x+y)%255);
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99 }
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100 }
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101 drawCircle(screen,mousx,mousy,-30,0xFFFFFF);
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102
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103 int i;
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104 for(i=0;i<MAXFINGERS;i++)
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105 if(finger[i].p.x >= 0 && finger[i].p.y >= 0)
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106 if(finger[i].pressure > 0)
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107 drawCircle(screen,finger[i].p.x*screen->w,finger[i].p.y*screen->h
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108 ,20,0xFF*finger[i].pressure);
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109 else
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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);
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112
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113 if(SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen);
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114
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115 SDL_Flip(screen);
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116 }
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117
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118 SDL_Surface* initScreen(int width,int height)
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119 {
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120 return SDL_SetVideoMode(width, height, DEPTH,
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121 SDL_HWSURFACE | SDL_RESIZABLE);
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122 }
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123
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124 int main(int argc, char* argv[])
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125 {
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126 SDL_Surface *screen;
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127 SDL_Event event;
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128
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129 int keypress = 0;
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130 int h=0,s=1,i,j;
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131
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132 memset(keystat,0,512*sizeof(keystat[0]));
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133 if (SDL_Init(SDL_INIT_VIDEO) < 0 ) return 1;
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134
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135 if (!(screen = initScreen(WIDTH,HEIGHT)))
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136 {
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137 SDL_Quit();
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138 return 1;
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139 }
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140
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141 while(!keystat[27]) {
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142 //Poll SDL
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143 while(SDL_PollEvent(&event))
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144 {
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145 switch (event.type)
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146 {
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147 case SDL_QUIT:
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148 keystat[27] = 1;
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149 break;
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150 case SDL_KEYDOWN:
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151 //printf("%i\n",event.key.keysym.sym);
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152 keystat[event.key.keysym.sym] = 1;
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153 //keypress = 1;
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154 break;
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155 case SDL_KEYUP:
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156 //printf("%i\n",event.key.keysym.sym);
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157 keystat[event.key.keysym.sym] = 0;
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158 //keypress = 1;
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159 break;
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160 case SDL_VIDEORESIZE:
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161 if (!(screen = initScreen(event.resize.w,
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162 event.resize.h)))
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163 {
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164 SDL_Quit();
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165 return 1;
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166 }
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167 break;
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168 case SDL_MOUSEMOTION:
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169 mousx = event.motion.x;
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170 mousy = event.motion.y;
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171 break;
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172 case SDL_MOUSEBUTTONDOWN:
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173 bstatus |= (1<<(event.button.button-1));
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174 break;
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175 case SDL_MOUSEBUTTONUP:
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176 bstatus &= ~(1<<(event.button.button-1));
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177 break;
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178 case SDL_FINGERMOTION:
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179 ;
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180 //printf("Finger: %i,x: %i, y: %i\n",event.tfinger.fingerId,
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181 // event.tfinger.x,event.tfinger.y);
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182 SDL_Touch* inTouch = SDL_GetTouch(event.tfinger.touchId);
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183 SDL_Finger* inFinger = SDL_GetFinger(inTouch,event.tfinger.fingerId);
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184
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185 finger[event.tfinger.fingerId].p.x = ((float)event.tfinger.x)/
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186 inTouch->xres;
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187 finger[event.tfinger.fingerId].p.y = ((float)event.tfinger.y)/
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188 inTouch->yres;
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189
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190 finger[event.tfinger.fingerId].pressure =
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191 ((float)event.tfinger.pressure)/inTouch->pressureres;
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192
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193 printf("Finger: %i, Pressure: %f Pressureres: %i\n",
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194 event.tfinger.fingerId,
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195 finger[event.tfinger.fingerId].pressure,
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196 inTouch->pressureres);
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197 //printf("Finger: %i, pressure: %f\n",event.tfinger.fingerId,
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198 // finger[event.tfinger.fingerId].pressure);
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199
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200
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201 break;
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202 case SDL_FINGERDOWN:
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203 printf("Figner: %i down - x: %i, y: %i\n",event.tfinger.fingerId,
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204 event.tfinger.x,event.tfinger.y);
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205 finger[event.tfinger.fingerId].p.x = event.tfinger.x;
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206 finger[event.tfinger.fingerId].p.y = event.tfinger.y;
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207 break;
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208 case SDL_FINGERUP:
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209 printf("Figner: %i up - x: %i, y: %i\n",event.tfinger.fingerId,
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210 event.tfinger.x,event.tfinger.y);
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211 finger[event.tfinger.fingerId].p.x = -1;
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212 finger[event.tfinger.fingerId].p.y = -1;
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213 break;
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214 }
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215 }
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216 //And draw
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217 DrawScreen(screen,h);
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218 /*
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219 for(i=0;i<512;i++)
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220 if(keystat[i]) printf("%i\n",i);
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221 printf("Buttons:%i\n",bstatus);
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222 */
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223 }
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224 SDL_Quit();
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diff changeset
225
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226 return 0;
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227 }