diff options
Diffstat (limited to 'source/blender/gpu/shaders/gpu_shader_vsm_store_frag.glsl')
-rw-r--r-- | source/blender/gpu/shaders/gpu_shader_vsm_store_frag.glsl | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/source/blender/gpu/shaders/gpu_shader_vsm_store_frag.glsl b/source/blender/gpu/shaders/gpu_shader_vsm_store_frag.glsl new file mode 100644 index 00000000000..4838289ff9e --- /dev/null +++ b/source/blender/gpu/shaders/gpu_shader_vsm_store_frag.glsl @@ -0,0 +1,21 @@ +/** + * This fragment shader was initially found at http://fabiensanglard.net/shadowmappingVSM/index.php + */ + +varying vec4 v_position; + +void main() +{ + float depth = v_position.z / v_position.w; + depth = depth * 0.5 + 0.5; + + float moment1 = depth; + float moment2 = depth * depth; + + // Adjusting moments using partial derivative + float dx = dFdx(depth); + float dy = dFdy(depth); + moment2 += 0.25*(dx*dx+dy*dy); + + gl_FragColor = vec4(moment1, moment2, 0.0, 0.0); +} |