medfall

commit e833e9edacb4dcab5bc1a9de1b506a574b3f9c3b
parent ae1b939e6ee51296d7bc15fffaead14ec04d8889
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Sat Nov 26 22:23:53 +0200

Fix sun direction in terrain shader

Diffstat:
terrain_manager.cc
 | 
4
++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/terrain_manager.cc b/terrain_manager.cc
@@ -77,8 +77,8 @@ static const char * frag_src = GLSL(
 		// sunlight + sky ambient lighting
 		// TODO: use formula for area of a chord?
 		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 sun_direction = normalize( vec3( -1, 0, 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( 0.02, 0.02, 0.15 );