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 static Vec3 grid_color;
  18 static int uloc_grid_color;
  19
  20 bool init_backdrop()
  21 {
  22         grid_color = color(1.0, 0.07, 1.0);
  23         Vec3 mid_color = color(0.133, 0.006, 0.612);
  24         Vec3 horiz_color = color(0.612, 0.006, 1.0);
  25         Vec3 zenith_color = color(0.029, 0.029, 0.029);
  26         Vec3 fog_color = color(0.01, 0.01, 0.01);
  27
  28         if(!(sdr_grid = create_program_load("sdr/grid.v.glsl", "sdr/grid.p.glsl"))) {
  29                 return false;
  30         }
  31         uloc_grid_color = get_uniform_loc(sdr_grid, "grid_color");
  32         set_uniform_float3(sdr_grid, "grid_color", grid_color.x, grid_color.y, grid_color.z);
  33         set_uniform_float3(sdr_grid, "fog_color", fog_color.x, fog_color.y, fog_color.z);
  34
  35         if(!(sdr_skydome = create_program_load("sdr/skydome.v.glsl", "sdr/skydome.p.glsl"))) {
  36                 return false;
  37         }
  38         set_uniform_float3(sdr_skydome, "zenith_color", zenith_color.x, zenith_color.y, zenith_color.z);
  39         set_uniform_float3(sdr_skydome, "mid_color", mid_color.x, mid_color.y, mid_color.z);
  40         set_uniform_float3(sdr_skydome, "horiz_color", horiz_color.x, horiz_color.y, horiz_color.z);
  41         set_uniform_float3(sdr_skydome, "fog_color", fog_color.x, fog_color.y, fog_color.z);
  42
  43         if(!(tex_grid = load_texture("data/grid2.png"))) {
  44                 delete tex_grid;
  45                 return false;
  46         }
  47         tex_grid->set_anisotropy(glcaps.max_aniso);
  48
  49         mesh_skydome = new Mesh;
  50         gen_sphere(mesh_skydome, 100.0, 32, 16, 1, 0.5);
  51         mesh_skydome->flip();
  52
  53         glClearColor(fog_color.x, fog_color.y, fog_color.z, 1.0);
  54
  55         return true;
  56 }
  57
  58 void cleanup_backdrop()
  59 {
  60         delete mesh_skydome;
  61         delete tex_grid;
  62         free_program(sdr_grid);
  63 }
  64
  65 void draw_backdrop()
  66 {
  67         // draw sky
  68         Mat4 view_mat_inf = view_matrix.upper3x3();
  69         glPushMatrix();
  70         glLoadMatrixf(view_mat_inf[0]);
  71
  72         glDisable(GL_DEPTH_TEST);
  73         glDepthMask(0);
  74
  75         bind_program(sdr_skydome);
  76         mesh_skydome->draw();
  77
  78         glEnable(GL_DEPTH_TEST);
  79         glDepthMask(1);
  80
  81         glPopMatrix();
  82
  83         // draw grid
  84         Mat4 xform;
  85         xform.scaling(500.0);
  86         glPushMatrix();
  87         glMultMatrixf(xform[0]);
  88
  89         bind_program(sdr_grid);
  90         float pulse = 1.0 + sin(time_sec * 3.0) * 0.25;
  91         glUniform3f(uloc_grid_color, grid_color.x * pulse, grid_color.y * pulse, grid_color.z * pulse);
  92         bind_texture(tex_grid);
  93
  94         glBegin(GL_QUADS);
  95         glNormal3f(0, 1, 0);
  96         glVertex3f(-1, 0, 1);
  97         glVertex3f(1, 0, 1);
  98         glVertex3f(1, 0, -1);
  99         glVertex3f(-1, 0, -1);
 100         glEnd();
 101
 102         glPopMatrix();
 103 }