medfall

commit f127c7ed142605a2907095278fc61166ffb01767
parent 3bcab8fafd77f2d34a1ed353d21dbb5bf9b0102e
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Sat, 18 Nov 2017 17:54:20 +0200

Whoops - add the skirt shader again

Diffstat:
shaders/clipmap_skirt.glsl
 | 
12
++++--------

1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/shaders/clipmap_skirt.glsl b/shaders/clipmap_skirt.glsl
@@ -10,7 +10,7 @@ layout( std140 ) uniform sun {
 };
 
 layout( std140 ) uniform clipmap_skirt {
-	vec2 bounds[ 4 ];
+	float scale;
 };
 
 struct VSOut {
@@ -25,13 +25,9 @@ in vec3 position;
 out VSOut v2f;
 
 void main() {
-	if( gl_VertexID < 4 ) {
-		v2f.view_position = V * vec4( position, 1.0 );
-	}
-	else {
-		vec2 p = bounds[ gl_VertexID - 4 ];
-		v2f.view_position = V * vec4( p, 0.0, 1.0 );
-	}
+	vec2 xy = position.xy + camera_pos.xy;
+	vec2 snapped_xy = floor( xy / scale ) * scale;
+	v2f.view_position = V * vec4( snapped_xy, 0.0, 1.0 );
 	gl_Position = P * v2f.view_position;
 }