Move lighting calculations to world space

[libs/gl.git] / shaderlib / shadow.glsl

diff --git a/shaderlib/shadow.glsl b/shaderlib/shadow.glsl
index f168fe7955431869b25f90b8909192453929bcd0..04cf6832dcffd19a6a4949c1049b98e0f2b64a40 100644 (file)
--- a/shaderlib/shadow.glsl
+++ b/shaderlib/shadow.glsl
@@ -3,7 +3,7 @@ import msp_interface;
 uniform ShadowMap
 {
        float shadow_darkness;
-       mat4 shd_eye_matrix;
+       mat4 shd_world_matrix;
 };
 
 uniform sampler2DShadow shadow_map;
@@ -11,9 +11,9 @@ uniform sampler2DShadow shadow_map;
 layout(constant_id=auto) const bool use_shadow_map = false;
 
 #pragma MSP stage(vertex)
-void shadow_transform(vec4 eye_vertex)
+void shadow_transform(vec4 world_vertex)
 {
-       out vec3 shadow_coord = (shd_eye_matrix*eye_vertex).xyz;
+       out vec3 shadow_coord = (shd_world_matrix*world_vertex).xyz;
 }
 
 #pragma MSP stage(fragment)
@@ -21,6 +21,8 @@ virtual float get_shadow_factor(int index)
 {
        if(use_shadow_map)
        {
+               if(shadow_coord.x<0 || shadow_coord.x>1 || shadow_coord.y<0 || shadow_coord.y>1)
+                       return 1.0;
                float shadow_sample = texture(shadow_map, shadow_coord);
                return mix(1.0, shadow_sample, shadow_darkness);
        }