Added gesture test c file. Beginning of gesture recognition.
This commit is contained in:
Jim Grandpre
parent
4960f0aff9
commit
9452f337e9
4 changed files with 363 additions and 1 deletions
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@ -44,7 +44,7 @@ EMBEDSPU = @EMBEDSPU@
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DIST = acinclude autogen.sh Borland.html Borland.zip BUGS build-scripts configure configure.in COPYING CREDITS include INSTALL Makefile.minimal Makefile.in README* sdl-config.in sdl.m4 sdl.pc.in SDL.spec SDL.spec.in src test TODO VisualC.html VisualC VisualCE Watcom-Win32.zip WhatsNew Xcode Xcode-iPhoneOS
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HDRS = SDL.h SDL_assert.h SDL_atomic.h SDL_audio.h SDL_compat.h SDL_cpuinfo.h SDL_endian.h SDL_error.h SDL_events.h SDL_haptic.h SDL_joystick.h SDL_keyboard.h SDL_keysym.h SDL_loadso.h SDL_main.h SDL_mouse.h SDL_mutex.h SDL_name.h SDL_opengl.h SDL_opengles.h SDL_pixels.h SDL_platform.h SDL_power.h SDL_quit.h SDL_rect.h SDL_revision.h SDL_rwops.h SDL_scancode.h SDL_stdinc.h SDL_surface.h SDL_syswm.h SDL_thread.h SDL_timer.h SDL_types.h SDL_version.h SDL_video.h begin_code.h close_code.h
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HDRS = SDL.h SDL_assert.h SDL_atomic.h SDL_audio.h SDL_compat.h SDL_cpuinfo.h SDL_endian.h SDL_error.h SDL_events.h SDL_haptic.h SDL_joystick.h SDL_keyboard.h SDL_keysym.h SDL_loadso.h SDL_main.h SDL_mouse.h SDL_mutex.h SDL_name.h SDL_opengl.h SDL_opengles.h SDL_pixels.h SDL_platform.h SDL_power.h SDL_quit.h SDL_rect.h SDL_revision.h SDL_rwops.h SDL_scancode.h SDL_stdinc.h SDL_surface.h SDL_syswm.h SDL_thread.h SDL_timer.h SDL_types.h SDL_version.h SDL_video.h begin_code.h close_code.h SDL_touch.h
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LT_AGE = @LT_AGE@
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LT_CURRENT = @LT_CURRENT@
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1
touchTest/TODO
Normal file
1
touchTest/TODO
Normal file
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@ -0,0 +1 @@
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Pressure is sometimes negative
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360
touchTest/gestureTest.c
Normal file
360
touchTest/gestureTest.c
Normal file
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@ -0,0 +1,360 @@
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#include <stdio.h>
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#include <SDL.h>
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#include <math.h>
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#include <SDL_touch.h>
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#define PI 3.1415926535897
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#define WIDTH 640
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#define HEIGHT 480
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#define BPP 4
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#define DEPTH 32
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#define MAXFINGERS 3
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//MUST BE A POWER OF 2!
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#define EVENT_BUF_SIZE 256
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SDL_Event events[EVENT_BUF_SIZE];
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int eventWrite;
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int mousx,mousy;
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int keystat[512];
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int bstatus;
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int colors[7] = {0xFF,0xFF00,0xFF0000,0xFFFF00,0x00FFFF,0xFF00FF,0xFFFFFF};
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int index2fingerid[MAXFINGERS];
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int fingersDown;
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typedef struct {
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float x,y;
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} Point;
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typedef struct {
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Point p;
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float pressure;
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int id;
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} Finger;
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Finger finger[MAXFINGERS];
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Finger gestureLast[MAXFINGERS];
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void handler (int sig)
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{
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printf ("\exiting...(%d)\n", sig);
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exit (0);
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}
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void perror_exit (char *error)
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{
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perror (error);
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handler (9);
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}
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void setpix(SDL_Surface *screen, int x, int y, unsigned int col)
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{
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Uint32 *pixmem32;
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Uint32 colour;
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if((unsigned)x > screen->w) return;
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if((unsigned)y > screen->h) return;
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pixmem32 = (Uint32*) screen->pixels + y*screen->pitch/BPP + x;
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Uint8 r,g,b;
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float a;
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memcpy(&colour,pixmem32,screen->format->BytesPerPixel);
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SDL_GetRGB(colour,screen->format,&r,&g,&b); //Always returns 0xFFFFFF?
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//r = 0;g = 0; b = 0;
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a = (col>>24)&0xFF;
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if(a == 0) a = 0xFF; //Hack, to make things easier.
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a /= 0xFF;
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r = r*(1-a) + ((col>>16)&0xFF)*(a);
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g = g*(1-a) + ((col>> 8)&0xFF)*(a);
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b = b*(1-a) + ((col>> 0)&0xFF)*(a);
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colour = SDL_MapRGB( screen->format,r, g, b);
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*pixmem32 = colour;
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}
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void drawCircle(SDL_Surface* screen,int x,int y,int r,unsigned int c)
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{
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float a;
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int tx;
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/*
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for(a=0;a<PI/2;a+=1.f/(float)abs(r))
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{
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if(r > 0) { //r > 0 ==> filled circle
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for(tx=x-r*cos(a);tx<x+r*cos(a);tx++) {
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setpix(screen,tx,(int)(y+r*sin(a)),c);
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setpix(screen,tx,(int)(y-r*sin(a)),c);
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}
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}
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else {
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//Draw Outline
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setpix(screen,(int)(x+r*cos(a)),(int)(y+r*sin(a)),c);
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setpix(screen,(int)(x-r*cos(a)),(int)(y+r*sin(a)),c);
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setpix(screen,(int)(x+r*cos(a)),(int)(y-r*sin(a)),c);
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setpix(screen,(int)(x-r*cos(a)),(int)(y-r*sin(a)),c);
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}
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}*/
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int ty;
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float xr;
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for(ty = -abs(r);ty <= abs(r);ty++) {
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xr = sqrt(r*r - ty*ty);
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if(r > 0) { //r > 0 ==> filled circle
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for(tx=-xr+.5;tx<=xr-.5;tx++) {
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setpix(screen,x+tx,y+ty,c);
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}
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}
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else {
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setpix(screen,x-xr+.5,y+ty,c);
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setpix(screen,x+xr-.5,y+ty,c);
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}
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}
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}
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void DrawScreen(SDL_Surface* screen, int h)
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{
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int x, y, xm,ym,c;
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if(SDL_MUSTLOCK(screen))
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{
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if(SDL_LockSurface(screen) < 0) return;
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}
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for(y = 0; y < screen->h; y++ )
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{
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for( x = 0; x < screen->w; x++ )
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{
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//setpixel(screen, x, y, (x*x)/256+3*y+h, (y*y)/256+x+h, h);
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//xm = (x+h)%screen->w;
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//ym = (y+h)%screen->w;
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//c = sin(h/256*2*PI)*x*y/screen->w/screen->h;
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//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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setpix(screen,x,y,((x%255)<<16) + ((y%255)<<8) + (x+y)%255);
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//setpix(screen,x,y,0); //Inefficient, but that's okay...
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}
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}
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drawCircle(screen,mousx,mousy,-30,0xFFFFFF);
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int i;
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//draw Touch History
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for(i = 0;i < MAXFINGERS;i++) gestureLast[i].id = -1;
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for(i = SDL_max(0,eventWrite - EVENT_BUF_SIZE);i != eventWrite;i++) {
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SDL_Event event = events[i&(EVENT_BUF_SIZE-1)];
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int age = eventWrite - i - 1;
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if(event.type == SDL_FINGERMOTION ||
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event.type == SDL_FINGERDOWN ||
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event.type == SDL_FINGERUP) {
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SDL_Touch* inTouch = SDL_GetTouch(event.tfinger.touchId);
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//SDL_Finger* inFinger = SDL_GetFinger(inTouch,event.tfinger.fingerId);
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float x = ((float)event.tfinger.x)/inTouch->xres;
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float y = ((float)event.tfinger.y)/inTouch->yres;
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int j,empty = -1;
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for(j = 0;j<MAXFINGERS;j++) {
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if(gestureLast[j].id == event.tfinger.fingerId) {
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if(event.type == SDL_FINGERUP) {
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gestureLast[j].id = -1;
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break;
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}
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else {
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gestureLast[j].p.x = x;
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gestureLast[j].p.y = y;
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break;
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//pressure?
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}
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}
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else if(gestureLast[j].id == -1 && empty == -1) {
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empty = j;
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}
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}
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if(j >= MAXFINGERS && empty >= 0) {
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printf("Finger Down!!!\n");
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j = empty; //important that j is the index of the added finger
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gestureLast[j].id = event.tfinger.fingerId;
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gestureLast[j].p.x = x;
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gestureLast[j].p.y = y;
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}
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//draw the touch && each centroid:
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if(gestureLast[j].id < 0) continue; //Finger up. Or some error...
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int k;
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for(k = 0; k < MAXFINGERS;k++) {
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if(gestureLast[k].id < 0) continue;
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//colors have no alpha, so shouldn't overflow
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unsigned int c = (colors[gestureLast[j].id%7] +
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colors[gestureLast[k].id%7])/2;
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unsigned int col =
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((unsigned int)(c*(.1+.85))) |
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((unsigned int)((0xFF*(1-((float)age)/EVENT_BUF_SIZE))) & 0xFF)<<24;
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x = (gestureLast[j].p.x + gestureLast[k].p.x)/2;
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y = (gestureLast[j].p.y + gestureLast[k].p.y)/2;
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if(event.type == SDL_FINGERMOTION)
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drawCircle(screen,x*screen->w,y*screen->h,5,col);
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else if(event.type == SDL_FINGERDOWN)
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drawCircle(screen,x*screen->w,y*screen->h,-10,col);
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}
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}
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}
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for(i=0;i<MAXFINGERS;i++)
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if(finger[i].p.x >= 0 && finger[i].p.y >= 0)
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if(finger[i].pressure > 0)
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drawCircle(screen,finger[i].p.x*screen->w,finger[i].p.y*screen->h
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,20,0xFF*finger[i].pressure);
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else
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drawCircle(screen,finger[i].p.x*screen->w,finger[i].p.y*screen->h
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,20,0xFF);
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if(SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen);
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SDL_Flip(screen);
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}
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SDL_Surface* initScreen(int width,int height)
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{
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return SDL_SetVideoMode(width, height, DEPTH,
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SDL_HWSURFACE | SDL_RESIZABLE);
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}
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int main(int argc, char* argv[])
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{
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SDL_Surface *screen;
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SDL_Event event;
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int keypress = 0;
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int h=0,s=1,i,j;
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memset(keystat,0,512*sizeof(keystat[0]));
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if (SDL_Init(SDL_INIT_VIDEO) < 0 ) return 1;
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if (!(screen = initScreen(WIDTH,HEIGHT)))
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{
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SDL_Quit();
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return 1;
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}
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while(!keystat[27]) {
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//Poll SDL
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while(SDL_PollEvent(&event))
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{
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//Record _all_ events
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events[eventWrite & (EVENT_BUF_SIZE-1)] = event;
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eventWrite++;
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switch (event.type)
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{
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case SDL_QUIT:
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keystat[27] = 1;
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break;
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case SDL_KEYDOWN:
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//printf("%i\n",event.key.keysym.sym);
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keystat[event.key.keysym.sym] = 1;
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//keypress = 1;
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break;
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case SDL_KEYUP:
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//printf("%i\n",event.key.keysym.sym);
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keystat[event.key.keysym.sym] = 0;
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//keypress = 1;
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break;
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case SDL_VIDEORESIZE:
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if (!(screen = initScreen(event.resize.w,
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event.resize.h)))
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{
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SDL_Quit();
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return 1;
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}
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break;
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case SDL_MOUSEMOTION:
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mousx = event.motion.x;
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mousy = event.motion.y;
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break;
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case SDL_MOUSEBUTTONDOWN:
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bstatus |= (1<<(event.button.button-1));
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break;
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case SDL_MOUSEBUTTONUP:
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bstatus &= ~(1<<(event.button.button-1));
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break;
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case SDL_FINGERMOTION:
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;
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//printf("Finger: %i,x: %i, y: %i\n",event.tfinger.fingerId,
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// event.tfinger.x,event.tfinger.y);
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SDL_Touch* inTouch = SDL_GetTouch(event.tfinger.touchId);
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SDL_Finger* inFinger = SDL_GetFinger(inTouch,event.tfinger.fingerId);
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for(i = 0;i<MAXFINGERS;i++)
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if(index2fingerid[i] == event.tfinger.fingerId)
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break;
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if(i == MAXFINGERS) break;
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if(inTouch > 0) {
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finger[i].p.x = ((float)event.tfinger.x)/
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inTouch->xres;
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finger[i].p.y = ((float)event.tfinger.y)/
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inTouch->yres;
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finger[i].pressure =
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((float)event.tfinger.pressure)/inTouch->pressureres;
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printf("Finger: %i, Pressure: %f Pressureres: %i\n",
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event.tfinger.fingerId,
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finger[i].pressure,
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inTouch->pressureres);
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//printf("Finger: %i, pressure: %f\n",event.tfinger.fingerId,
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// finger[event.tfinger.fingerId].pressure);
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}
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break;
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case SDL_FINGERDOWN:
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printf("Finger: %i down - x: %i, y: %i\n",event.tfinger.fingerId,
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event.tfinger.x,event.tfinger.y);
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for(i = 0;i<MAXFINGERS;i++)
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if(index2fingerid[i] == -1) {
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index2fingerid[i] = event.tfinger.fingerId;
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break;
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}
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finger[i].p.x = event.tfinger.x;
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finger[i].p.y = event.tfinger.y;
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break;
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case SDL_FINGERUP:
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printf("Figner: %i up - x: %i, y: %i\n",event.tfinger.fingerId,
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event.tfinger.x,event.tfinger.y);
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for(i = 0;i<MAXFINGERS;i++)
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if(index2fingerid[i] == event.tfinger.fingerId) {
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index2fingerid[i] = -1;
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break;
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}
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finger[i].p.x = -1;
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finger[i].p.y = -1;
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break;
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}
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}
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//And draw
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DrawScreen(screen,h);
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/*
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for(i=0;i<512;i++)
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if(keystat[i]) printf("%i\n",i);
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printf("Buttons:%i\n",bstatus);
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*/
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}
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SDL_Quit();
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return 0;
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}
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@ -1,4 +1,5 @@
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SDLTest : touchSimp.c touchPong.c
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gcc gestureTest.c -o gestureTest `sdl-config --cflags --libs` -g
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gcc touchTest.c -o touchTest `sdl-config --cflags --libs` -g
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gcc touchSimp.c -o touchSimp `sdl-config --cflags --libs` -g
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gcc touchPong.c -o touchPong `sdl-config --cflags --libs` -g
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