git.mutantstargoat.com Git - vrfileman/blob - src/backdrop.cc

   1 #include "opengl.h"
   2 #include "gmath/gmath.h"
   3 #include "sdr.h"
   4 #include "texture.h"
   5 #include "mesh.h"
   6 #include "meshgen.h"
   7 #include "backdrop.h"
   8 #include "app.h"
   9 #include "color.h"
  10
  11 static unsigned int sdr_grid;
  12 static Texture *tex_grid;
  13
  14 static Mesh *mesh_skydome;
  15 static unsigned int sdr_skydome;
  16
  17
  18 bool init_backdrop()
  19 {
  20         Vec3 grid_color = color(1.0, 0.07, 1.0);
  21         Vec3 mid_color = color(0.133, 0.006, 0.612);
  22         Vec3 horiz_color = color(0.612, 0.006, 1.0);
  23         Vec3 zenith_color = color(0.029, 0.029, 0.029);
  24         Vec3 fog_color = color(0.01, 0.01, 0.01);
  25
  26         if(!(sdr_grid = create_program_load("sdr/grid.v.glsl", "sdr/grid.p.glsl"))) {
  27                 return false;
  28         }
  29         set_uniform_float3(sdr_grid, "grid_color", grid_color.x, grid_color.y, grid_color.z);
  30         set_uniform_float3(sdr_grid, "fog_color", fog_color.x, fog_color.y, fog_color.z);
  31
  32         if(!(sdr_skydome = create_program_load("sdr/skydome.v.glsl", "sdr/skydome.p.glsl"))) {
  33                 return false;
  34         }
  35         set_uniform_float3(sdr_skydome, "zenith_color", zenith_color.x, zenith_color.y, zenith_color.z);
  36         set_uniform_float3(sdr_skydome, "mid_color", mid_color.x, mid_color.y, mid_color.z);
  37         set_uniform_float3(sdr_skydome, "horiz_color", horiz_color.x, horiz_color.y, horiz_color.z);
  38         set_uniform_float3(sdr_skydome, "fog_color", fog_color.x, fog_color.y, fog_color.z);
  39
  40         if(!(tex_grid = load_texture("data/grid2.png"))) {
  41                 delete tex_grid;
  42                 return false;
  43         }
  44         tex_grid->set_anisotropy(glcaps.max_aniso);
  45
  46         mesh_skydome = new Mesh;
  47         gen_sphere(mesh_skydome, 500.0, 32, 16, 1, 0.5);
  48         mesh_skydome->flip();
  49
  50         glClearColor(fog_color.x, fog_color.y, fog_color.z, 1.0);
  51
  52         return true;
  53 }
  54
  55 void cleanup_backdrop()
  56 {
  57         delete mesh_skydome;
  58         delete tex_grid;
  59         free_program(sdr_grid);
  60 }
  61
  62 void draw_backdrop()
  63 {
  64         // draw sky
  65         Mat4 view_mat_inf = view_matrix.upper3x3();
  66         glPushMatrix();
  67         glLoadMatrixf(view_mat_inf[0]);
  68
  69         glDisable(GL_DEPTH_TEST);
  70         glDepthMask(0);
  71
  72         bind_program(sdr_skydome);
  73         mesh_skydome->draw();
  74
  75         glEnable(GL_DEPTH_TEST);
  76         glDepthMask(1);
  77
  78         glPopMatrix();
  79
  80         // draw grid
  81         Mat4 xform;
  82         xform.scaling(500.0);
  83         glPushMatrix();
  84         glMultMatrixf(xform[0]);
  85
  86         bind_program(sdr_grid);
  87         bind_texture(tex_grid);
  88
  89         glBegin(GL_QUADS);
  90         glNormal3f(0, 1, 0);
  91         glVertex3f(-1, 0, 1);
  92         glVertex3f(1, 0, 1);
  93         glVertex3f(1, 0, -1);
  94         glVertex3f(-1, 0, -1);
  95         glEnd();
  96
  97         glPopMatrix();
  98 }