Moar optimization, moar speed

uis246 · Nov 30, 2020 · a3b10c7 · a3b10c7
1 parent 745f7ba
commit a3b10c7
Showing 1 changed file with 3 additions and 7 deletions.
diff --git a/cwd/assets/altcraft/shaders/vert/face.vs b/cwd/assets/altcraft/shaders/vert/face.vs
@@ -30,7 +30,7 @@ out VS_OUT {
 	flat vec3 Color;
 } vs_out;
 
-//Intel SNB: VS vec4 shader: 54 instructions. 0 loops. 194 cycles. 0:0 spills:fills, 1 sends. Compacted 864 to 848 bytes (2%)
+//Intel SNB: VS vec4 shader: 53 instructions. 0 loops. 178 cycles. 0:0 spills:fills, 1 sends. Compacted 848 to 832 bytes (2%)
 
 void main() {
 	gl_Position = projView * vec4(positions[gl_VertexID], 1.0);
@@ -44,14 +44,10 @@ void main() {
 		uvec4(qinfo, qinfo >> uint(5)) & uint(0x1F)
 		) * 0.0625 /* /16.0 */;
 
-// 	tex.xy += subUV.xy * tex.zw;
-// 	tex.zw = subUV.zw * tex.zw * uv;
-// 	UvPosition = tex.xy + tex.zw;
-
-	UvPosition = tex.xy + subUV.xy*tex.zw + subUV.zw*tex.zw*uv;
+	UvPosition = tex.xy + tex.zw*(subUV.xy + uv*(subUV.zw-subUV.xy));
 	Layer = phlf.z;
 
-	vec2 light = vec2((qinfo >> uint(10)) & uint(0xF)) / 15.0;
+	vec2 light = vec2((qinfo >> uint(10)) & uint(0xF)) * (1 / 15.0);
 	vs_out.Light = clamp(light.x + (light.y * DayTime), MinLightLevel, 1.0);
 	vs_out.Color = vec3(0.275, 0.63, 0.1) * (qinfo.x>>14);
 }