Put the PI constant in builtins

[libs/gl.git] / builtin_data / _sky_backdrop.glsl

diff --git a/builtin_data/_sky_backdrop.glsl b/builtin_data/_sky_backdrop.glsl
index 0aac6c8080553da91a246b18f7dd6d010be11e5a..420f0ed5ff1ce268a7a2a2480d0b87e558047a1b 100644 (file)
--- a/builtin_data/_sky_backdrop.glsl
+++ b/builtin_data/_sky_backdrop.glsl
@@ -7,7 +7,7 @@ uniform sampler2D distant;
 void main()
 {
        gl_Position = vec4(vertex.xy, 1.0, 1.0);
-       mat4 inv_projection = inverse(projection_matrix);
+       mat4 inv_projection = inverse(clip_eye_matrix);
        out vec4 view_dir = inv_projection*vec4(vertex.xy, -1.0, 1.0);
        view_dir /= view_dir.w;
        view_dir = inverse(eye_world_matrix)*vec4(view_dir.xyz, 0.0);
@@ -18,5 +18,5 @@ void main()
 {
        vec3 nview = normalize(view_dir.xyz);
        float azimuth = atan(nview.y, nview.x);
-       frag_color = texture(distant, vec2(azimuth/(2*pi), nview.z*0.5+0.5))*light_color;
+       frag_color = texture(distant, vec2(azimuth/(2*PI), nview.z*0.5+0.5))*light_color;
 }