73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
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#include <android/log.h>
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#include "SDL.h"
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int main(int argc, char* argv[])
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{
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SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_JOYSTICK);
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SDL_Surface * screen = SDL_SetVideoMode(640, 480, 16, 0);
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enum { MAX_POINTERS = 16, PTR_PRESSED = 4 };
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int touchPointers[MAX_POINTERS][5];
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int accel[5];
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int i;
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memset(touchPointers, 0, sizeof(touchPointers));
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memset(accel, 0, sizeof(accel));
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SDL_Joystick * joysticks[MAX_POINTERS+1];
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for(i=0; i<MAX_POINTERS; i++)
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joysticks[i] = SDL_JoystickOpen(i);
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while(1)
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{
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SDL_Event evt;
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while( SDL_PollEvent(&evt) )
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{
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if( evt.type == SDL_JOYAXISMOTION )
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{
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if( evt.jaxis.which == 0 ) // 0 = The accelerometer
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{
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accel[evt.jaxis.axis] = evt.jaxis.value;
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continue;
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}
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int joyid = evt.jaxis.which - 1;
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touchPointers[joyid][evt.jaxis.axis] = evt.jaxis.value; // Axis 0 and 1 are coordinates, 2 and 3 are pressure and touch point radius
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}
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if( evt.type == SDL_JOYBUTTONDOWN || evt.type == SDL_JOYBUTTONUP )
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{
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if( evt.jbutton.which == 0 ) // 0 = The accelerometer
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continue;
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int joyid = evt.jbutton.which - 1;
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touchPointers[joyid][PTR_PRESSED] = (evt.jbutton.state == SDL_PRESSED);
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}
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if(evt.type == SDL_KEYDOWN && evt.key.keysym.sym == SDLK_ESCAPE)
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return 0;
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}
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SDL_FillRect(screen, 0, 0);
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SDL_Rect r;
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for(i=0; i<MAX_POINTERS; i++)
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{
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if( !touchPointers[i][PTR_PRESSED] )
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continue;
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r.x = touchPointers[i][0];
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r.y = touchPointers[i][1];
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r.w = 80 + touchPointers[i][2] / 10; // Pressure
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r.h = 80 + touchPointers[i][3] / 10; // Touch point size
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r.x -= r.w/2;
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r.y -= r.h/2;
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SDL_FillRect(screen, &r, 0xffffff);
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}
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r.x = 320 + accel[0] / 100;
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r.y = 240 + accel[1] / 100;
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r.w = 10 + abs(accel[2]);
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r.h = 10;
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r.x -= r.w/2;
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r.y -= r.h/2;
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__android_log_print(ANDROID_LOG_INFO, "Example", "Accelerometer %06d %06d %06d", accel[0], accel[1], accel[2]);
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SDL_FillRect(screen, &r, 0xaaaaaa);
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SDL_Flip(screen);
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}
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return 0;
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}
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