labs/physics.c

   1 #define VG_GAME
   2 #define VG_AUDIO_FORCE_COMPRESSED
   3 #define VG_3D
   4 #define VG_LOG_SOURCE_INFO
   5 #define VG_TIMESTEP_FIXED (1.0/60.0)
   6
   7 #ifndef VG_RELEASE
   8  #define VG_DEVWINDOW
   9 #endif
  10
  11 #define SDL_MAIN_HANDLED
  12
  13 #include "vg/vg.h"
  14 #include "vg/vg_camera.h"
  15
  16 int main( int argc, char *argv[] ){
  17    vg_mem.use_libc_malloc = 0;
  18    vg_set_mem_quota( 80*1024*1024 );
  19    vg_enter( argc, argv, "Voyager Game Engine" );
  20    return 0;
  21 }
  22
  23 static void vg_launch_opt(void){
  24    const char *arg;
  25 }
  26
  27 static void vg_preload(void){
  28    vg_audio.dsp_enabled = 0;
  29 }
  30
  31 static void vg_load(void){
  32    vg_bake_shaders();
  33 }
  34
  35 static void vg_pre_update(void){
  36 }
  37
  38 static void vg_fixed_update(void){
  39 }
  40
  41 static void vg_post_update(void){
  42 }
  43
  44 static void vg_framebuffer_resize( int w, int h ){
  45 }
  46
  47 static void draw_origin_axis(void){
  48    vg_line( (v3f){ 0.0f, 0.0f, 0.0f }, (v3f){ 1.0f, 0.0f, 0.0f }, 0xffff0000 );
  49    vg_line( (v3f){ 0.0f, 0.0f, 0.0f }, (v3f){ 0.0f, 1.0f, 0.0f }, 0xff00ff00 );
  50    vg_line( (v3f){ 0.0f, 0.0f, 0.0f }, (v3f){ 0.0f, 0.0f, 1.0f }, 0xff0000ff );
  51 }
  52
  53 static void vg_render(void){
  54    glBindFramebuffer( GL_FRAMEBUFFER, 0 );
  55    glViewport( 0,0, vg.window_x, vg.window_y );
  56    glEnable( GL_DEPTH_TEST );
  57    glDisable( GL_BLEND );
  58
  59    glClearColor( 0.05f, 0.05f, 0.05f, 1.0f );
  60    glClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT );
  61
  62    f32 x = -((f32)vg.mouse_pos[0] / (f32)vg.window_x) * VG_TAUf,
  63        y = (((f32)vg.mouse_pos[1] / (f32)vg.window_y) - 0.5f)*VG_PIf;
  64
  65    f32 t = vg.time * 0.1f * VG_TAUf;
  66
  67    vg_camera cam = {
  68       .angles = { -x, y, 0 },
  69       .nearz = 0.01f,
  70       .farz = 500.0f,
  71       .fov = 90.0f,
  72       .pos = { sinf(x)*10.0f*cosf(y),
  73                sinf(y)*10.0f,
  74                cosf(x)*10.0f*cosf(y) },
  75    };
  76
  77    vg_camera_update_transform( &cam );
  78    vg_camera_update_view( &cam );
  79    vg_camera_update_projection( &cam );
  80    vg_camera_finalize( &cam );
  81    m4x4_copy( cam.mtx.pv, vg.pv );
  82
  83    m4x3f mdl;
  84    m4x3_identity( mdl );
  85
  86    vg_rb_view_bind();
  87    vg_rb_view_capsule( mdl, (sinf(t*0.2f)*0.5f+0.55f)*2.0f,
  88                             (sinf(t*0.33f)*0.5f+0.55f)*1.0f,
  89                             (v4f){1,0,0,1} );
  90    vg_rb_view_box( mdl, (boxf){{-4.999,-2.001,-4.999},{4.999,-0.999,4.999}},
  91                   (v4f){0.8f,0.8f,0.8f,1} );
  92
  93    mdl[3][0] = sinf(t)*2.0f;
  94    mdl[3][2] = cosf(t)*2.0f;
  95    vg_rb_view_sphere( mdl, 1, (v4f){0,1,0,1} );
  96
  97    draw_origin_axis();
  98    vg_lines_drawall();
  99
 100    glDisable(GL_DEPTH_TEST);
 101 }
 102
 103 static void vg_gui(void){
 104    vg_ui.wants_mouse = 1;
 105 }