On OpenGL ES offset the skybox slightly in front of the far plane to avoid clipping artifacts from inaccuracy. Closes #517.

2014-11-08 13:14:44 +02:00 · 2014-11-08 13:14:44 +02:00 · b6e854eb27
commit b6e854eb27
parent 1edc6bfe64
1 changed files with 5 additions and 0 deletions
--- a/Bin/CoreData/Shaders/GLSL/Skybox.glsl
+++ b/Bin/CoreData/Shaders/GLSL/Skybox.glsl
@ -10,7 +10,12 @@ void VS()
    vec3 worldPos = GetWorldPos(modelMatrix);
    gl_Position = GetClipPos(worldPos);

+    #ifndef GL_ES
    gl_Position.z = gl_Position.w;
+    #else
+    // On OpenGL ES force Z slightly in front of far plane to avoid clipping artifacts due to inaccuracy
+    gl_Position.z = 0.999 * gl_Position.w;
+    #endif
    vTexCoord = iPos.xyz;
 }