medfall

commit b1e080d86e7cd3320d18a2d4877eb924fe4ff790
parent 8e382e55126529c867720b3c5f080717bbdf2561
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Wed,  1 Nov 2017 23:49:45 +0200

Fix shaky clipmap terrain

Diffstat:
shaders/clipmap.glsl
 | 
5
+++--

1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/shaders/clipmap.glsl b/shaders/clipmap.glsl
@@ -31,12 +31,13 @@ out VSOut v2f;
 
 void main() {
 	vec2 xy = offset + position.xy * scale + camera_pos.xy;
-	vec2 uv = floor( xy / scale ) * scale / textureSize( heightmap, 0 ) + 0.5;
+	vec2 snapped_xy = floor( xy / scale ) * scale;
+	vec2 uv = snapped_xy / textureSize( heightmap, 0 ) + 0.5;
 	float z = 255.0 * texture( heightmap, uv ).r + texture( heightmap, uv ).g;
 
 	v2f.pos = vec3( xy, z );
 	v2f.uv = uv;
-	gl_Position = P * V * vec4( floor( xy ), z, 1.0 );
+	gl_Position = P * V * vec4( snapped_xy, z, 1.0 );
 }
 
 #else