medfall

commit 45bf5ffe31f47541fe5a5d611505ccc8dc07cb43
parent 75745ceafd53891ea769dfe3894d03a6b744e750
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Sat Aug 26 16:30:18 +0100

Add common.glsl

Diffstat:
shaders/common.glsl
 | 
5
+++++
shaders/terrain.glsl
 | 
8
+-------
2 files changed, 6 insertions(+), 7 deletions(-)
diff --git a/shaders/common.glsl b/shaders/common.glsl
@@ -0,0 +1,5 @@
+vec3 alu_noise( vec2 uv ) {
+	vec3 dither = vec3( dot( vec2( 171.0, 231.0 ), uv ) );
+	dither = fract( dither / vec3( 103.0, 71.0, 97.0 ) ) - vec3( 0.5, 0.5, 0.5 );
+	return ( dither / 256.0 ) * 0.5;
+}
diff --git a/shaders/terrain.glsl b/shaders/terrain.glsl
@@ -37,12 +37,6 @@ uniform sampler2D horizons;
 uniform samplerBuffer point_light_origins;
 uniform samplerBuffer point_light_colours;
 
-vec3 noise( vec2 uv ) {
-	vec3 dither = vec3( dot( vec2( 171.0, 231.0 ), uv ) );
-	dither = fract( dither / vec3( 103.0, 71.0, 97.0 ) ) - vec3( 0.5, 0.5, 0.5 );
-	return ( dither / 256.0 ) * 0.5;
-}
-
 void main() {
 	vec2 world_pos = mod( v2f.world_position.xy, textureSize( normals, 0 ) - ivec2( 1, 1 ) );
 
@@ -99,7 +93,7 @@ void main() {
 	float fog_distance_bias = 100.0;
 	float fog_t = 1.0 - exp( -fog_strength * max( ( length( v2f.view_position ) - fog_distance_bias ), 0.0 ) );
 
-	vec3 dither_noise = noise( gl_FragCoord.xy );
+	vec3 dither_noise = alu_noise( gl_FragCoord.xy );
 
 	colour = vec4( mix( c, fog_colour, fog_t ) + dither_noise, 1.0 );
 }