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C-/C++-Quelltext

gl_Position = light_viewprojection_matrix * vertex_pos; // Für die viewprojection-matrix siehe letztes Codesnippet.
 gl_FragDepth = length(var_vertex_pos - light_pos) / max_distance;

C-/C++-Quelltext

gl_Position = camera_mvp_matrix * vertex_pos;
 frag_depth = length(var_vertex_pos - light_pos) / max_distance;
 shadow_map_depth = texture(shadow_map, (var_vertex_pos - light_pos)).x;
 if (shadow_map_depth > frag_depth + 0.0005) is_in_light = 1.0;

C-/C++-Quelltext

glGenTextures(1, &m_shadow_depth_cubemap_id);
 glBindTexture(GL_TEXTURE_CUBE_MAP, m_shadow_depth_cubemap_id);
 glTexParameterf(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 glTexParameterf(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 glTexParameterf(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 glTexParameterf(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 glTexParameterf(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
 for (char face = 0; face < 6; face++)
 {
   glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, 0, GL_DEPTH_COMPONENT32,
    1024, 1024, 0, GL_DEPTH_COMPONENT, GL_FLOAT, 0);
 }

C-/C++-Quelltext

//  Create Projection Matrix for the light, 90degrees, ratio 1:1, nearplane  0.1, farplane: 40.0 (this is the max_distance I use in my shaders).
 Mat4f light_proj_matrix;
 light_proj_matrix.set_projection(90.0, 1.0, 0.1, 40.0);
 
 // Create ViewProjection- and View-Matrices which are facing the cubemap-face from the lightpositions point of view.
 Mat4f light_vp_matrices[6];
 Mat4f light_v_matrices[6];
 for (size_t i = 0; i < 6; i++)
 {
   Vec3f cube_normal, cube_up;
   switch (i)
   {
    case 0: cube_normal.set( 1.0,  0.0,  0.0); cube_up.set( 0.0, -1.0,  0.0); break;
    case 1: cube_normal.set(-1.0,  0.0,  0.0); cube_up.set( 0.0, -1.0,  0.0); break;
    case 2: cube_normal.set( 0.0,  1.0,  0.0); cube_up.set( 0.0,  0.0,  1.0); break;
    case 3: cube_normal.set( 0.0, -1.0,  0.0); cube_up.set( 0.0,  0.0, -1.0); break;
    case 4: cube_normal.set( 0.0,  0.0,  1.0); cube_up.set( 0.0, -1.0,  0.0); break;
    case 5: cube_normal.set( 0.0,  0.0, -1.0); cube_up.set( 0.0, -1.0,  0.0); break;
   }
   // set_view(position, look_at_position, up_dir), just like gluLookAt
   light_v_matrices[i].set_view(light_position, light_position + cube_normal, cube_up);
   light_vp_matrices[i] = light_proj_matrix * light_v_matrices[i];
 }