X-Git-Url: https://git.lukelau.me/?a=blobdiff_plain;f=billboardfrag.glsl;h=046b7bd3bca6e335cd847e6e6dc4151f4edf03fa;hb=0258cd283dc666dd89f620179f57343662ab5d1a;hp=2349e4dfef4610558042a9f6b8315e1ac217800a;hpb=31f19438c73b207f506ba0b1187d2de75c166a5b;p=clouds.git

diff --git a/billboardfrag.glsl b/billboardfrag.glsl
index 2349e4d..046b7bd 100644
--- a/billboardfrag.glsl
+++ b/billboardfrag.glsl
@@ -4,9 +4,15 @@ uniform sampler2D tex;
 in vec2 texCoord;
 out vec4 FragColor;
 uniform bool modulate;
+uniform bool debugContDist;
+uniform float density;
 void main() {
+  if (debugContDist) {
+    FragColor = mix(vec4(1, 1, 1, 1), vec4(1, 0, 0, 1), density);
+    return;
+  }
 	// Cf = color from fragment, Ct = color from texture
-	// Cc = color from texture environment(?) assume to be 0?
+	// Cc = color from texture environment -- not set, defaults to (0,0,0,0)
 	// Af = alpha from fragment, At = alpha from texture
 	// C = output color, A = output alpha
 	float f = texture(tex, texCoord).r;