medfall

commit 686597c8639e50cd746eef79fa9322eb8a55fff6
parent 187b0f7d0ddfff03a9937a9478a2a2254d3bc08d
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Wed Oct 12 22:55:15 +0300

Small sun shader tweaks

Diffstat:
terrain_manager.cc
 | 
6
+++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/terrain_manager.cc b/terrain_manager.cc
@@ -51,7 +51,6 @@ static const GLchar * frag_src = GLSL(
 
 	void main() {
 		vec3 normal = normalize( texture( normals, smooth_position.xy / dimensions ).xyz );
-		vec3 sun_direction = normalize( vec3( 1, 1, -sun ) );
 		float horizon = texture( horizons, smooth_position.xy / dimensions ).r;
 
 		// ground colour
@@ -76,10 +75,11 @@ static const GLchar * frag_src = GLSL(
 
 		// sunlight + sky ambient lighting
 		// TODO: use formula for area of a chord?
-		float sun_visible_fraction = smoothstep( 0, 0.5, sun - horizon );
+		float sun_visible_fraction = smoothstep( 0, 0.2, sun - horizon );
+		vec3 sun_direction = normalize( vec3( 1, 1, -sun ) );
 		float sunlight_lambert = max( 0, -dot( normal, sun_direction ) );
 		vec3 sunlight = sun_visible_fraction * sunlight_lambert * vec3( 0.9, 0.9, 0.5 );
-		vec3 ambient = vec3( 0.0, 0.1, 0.3 );
+		vec3 ambient = vec3( 0.02, 0.02, 0.15 );
 
 		vec3 c = ( sunlight + ambient ) * ground;