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[clouds.git] / billboardfrag.glsl

diff --git a/billboardfrag.glsl b/billboardfrag.glsl
index 2349e4dfef4610558042a9f6b8315e1ac217800a..046b7bd3bca6e335cd847e6e6dc4151f4edf03fa 100644 (file)
--- 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;