X-Git-Url: https://git.lukelau.me/?p=clouds.git;a=blobdiff_plain;f=billboardfrag.glsl;h=c2e480bf88a930278ffe6f472f8be86c02b1bddd;hp=16e074e616aae9ea8101b38a11564982e249c894;hb=e4bfe561fba2c32bf5ecdbf6a96067676ab313a2;hpb=92594780db1f9bb51b97e68457c526fa4287a29e

diff --git a/billboardfrag.glsl b/billboardfrag.glsl
index 16e074e..c2e480b 100644
--- a/billboardfrag.glsl
+++ b/billboardfrag.glsl
@@ -5,8 +5,13 @@ in vec2 texCoord;
 out vec4 FragColor;
 uniform bool modulate;
 uniform bool debug;
+uniform bool debugColor;
 uniform float debugVal;
 void main() {
+  if (debugColor) {
+    FragColor = color;
+    return;
+  }
   if (debug) {
     FragColor = mix(vec4(1, 1, 1, 1), vec4(1, 0, 0, 1), debugVal);
     return;
@@ -22,6 +27,9 @@ void main() {
 		// A = Af * At				
 		FragColor = color * f;
 	} else {
+        // "That is, the colors in the frame buffer are multiplied by the
+        // attenuation ratio of the billboard texture and then the colors in
+        // the texture are added"
 		// GL_BLEND:
 		// C = Cf * (1-Ct) + Cc * Ct
 		// A = Af * At