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Merge pull request #208 from albertvaka/albertvaka/camera-demo
Add camera demo
authored by
Jonathan Dearborn
and committed by
GitHub
c651912e
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demos/CMakeLists.txt
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demos/CMakeLists.txt
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add_executable(init-demo init/main.c)
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target_link_libraries (init-demo ${DEMO_LIBS})
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add_executable(camera-demo camera/main.c)
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target_link_libraries (camera-demo ${DEMO_LIBS})
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add_executable(3d-demo 3d/main.c ../src/externals/glew/glew.c)
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target_link_libraries (3d-demo ${DEMO_LIBS})
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···
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target_link_libraries (tutorial-space-demo ${DEMO_LIBS})
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add_executable(simple-shader-demo simple-shader/main.c)
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target_link_libraries (simple-shader-demo ${DEMO_LIBS})
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target_link_libraries (simple-shader-demo ${DEMO_LIBS})
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file(COPY data DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
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demos/camera/main.c
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demos/camera/main.c
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#include <SDL.h>
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#include "SDL_gpu.h"
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#define MOVE_VEL 800
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#define ZOOM_VEL 2
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#define ROTATE_VEL 45
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void main_loop(GPU_Target* screen)
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{
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Uint8 done;
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SDL_Event event;
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Uint32 start_time, end_time;
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float dt;
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GPU_Camera camera;
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GPU_Image *image1, *image2;
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image1 = GPU_LoadImage("data/test3.png");
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image2 = GPU_LoadImage("data/test2.png");
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camera = GPU_GetDefaultCamera();
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start_time = SDL_GetTicks();
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dt = 0.0f;
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done = 0;
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while(!done)
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{
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while(SDL_PollEvent(&event))
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{
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if(event.type == SDL_QUIT)
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done = 1;
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else if(event.type == SDL_KEYDOWN)
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{
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if(event.key.keysym.sym == SDLK_ESCAPE)
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done = 1;
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else if(event.key.keysym.sym == SDLK_c)
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camera.use_centered_origin = !camera.use_centered_origin;
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else if(event.key.keysym.sym == SDLK_w)
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camera.y -= MOVE_VEL*dt;
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else if(event.key.keysym.sym == SDLK_s)
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camera.y += MOVE_VEL*dt;
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else if(event.key.keysym.sym == SDLK_a)
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camera.x -= MOVE_VEL*dt;
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else if(event.key.keysym.sym == SDLK_d)
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camera.x += MOVE_VEL*dt;
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else if(event.key.keysym.sym == SDLK_d)
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camera.x += MOVE_VEL*dt;
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else if(event.key.keysym.sym == SDLK_r)
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camera.zoom_x = camera.zoom_y += ZOOM_VEL*dt;
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else if(event.key.keysym.sym == SDLK_f)
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camera.zoom_x = camera.zoom_y -= ZOOM_VEL*dt;
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else if(event.key.keysym.sym == SDLK_q)
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camera.angle -= ROTATE_VEL*dt;
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else if(event.key.keysym.sym == SDLK_e)
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camera.angle += ROTATE_VEL*dt;
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}
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}
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GPU_SetCamera(screen, &camera);
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GPU_Clear(screen);
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for (int i = -10; i < 10; i++) {
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GPU_BlitScale(image2, NULL, screen, i*128, 0, 0.5f, 0.5f);
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GPU_BlitScale(image2, NULL, screen, 0, i*128, 0.5f, 0.5f);
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GPU_BlitScale(image1, NULL, screen, i*100, i*100, 0.5f, 0.5f);
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GPU_BlitScale(image1, NULL, screen, i*100, -i*100, 0.5f, 0.5f);
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}
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GPU_Flip(screen);
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SDL_Delay(10);
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end_time = SDL_GetTicks();
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dt = (end_time - start_time)/1000.0f;
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start_time = end_time;
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}
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}
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int main(int argc, char* argv[])
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{
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GPU_Target* screen;
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GPU_SetDebugLevel(GPU_DEBUG_LEVEL_1);
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screen = GPU_Init(800, 600, GPU_DEFAULT_INIT_FLAGS);
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if(screen == NULL)
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return -1;
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GPU_EnableCamera(screen, true);
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main_loop(screen);
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GPU_Quit();
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return 0;
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}
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