Fix float/int divide (it is not allowed).

diff --git a/vignette_effect.glsl b/vignette_effect.glsl
index 4e4f26b..bc84516 100644 (file)
--- a/vignette_effect.glsl
+++ b/vignette_effect.glsl
@@ -6,7 +6,7 @@ uniform vec2 PREFIX(aspect_correction);
 vec4 FUNCNAME(vec2 tc) {
        vec4 x = LAST_INPUT(tc);
 
-       const float pihalf = 3.14159265358979324 / 2;
+       const float pihalf = 0.5 * 3.14159265358979324;
 
        vec2 normalized_pos = (tc - PREFIX(center)) * PREFIX(aspect_correction);
        float dist = (length(normalized_pos) - PREFIX(inner_radius)) * PREFIX(inv_radius);