turbo chaos

[carveJwlIkooP6JGAAIwe30JlM.git] / shaders / scene_override.fs

diff --git a/shaders/scene_override.fs b/shaders/scene_override.fs
index 60bf90d9c962cf25ac5f2e38f48bad2e7f398f27..2ab8d8daccdc5d92c54130bb4cb4d77d01a15858 100644 (file)
--- a/shaders/scene_override.fs
+++ b/shaders/scene_override.fs
@@ -6,6 +6,7 @@ uniform vec4 uPlane;
 uniform vec4 uPlayerPos; /* w: distance to uSpawnPos */
 uniform vec4 uSpawnPos;  /* w: inverse distance to uPlayerPos */
 uniform bool uAlphatest;
+uniform float uIsoAmt;
 
 #include "common_scene.glsl"
 #include "motion_vectors_fs.glsl"
@@ -64,6 +65,15 @@ void main(){
    float d3 = distance(p0,aCo);
    emit += vec3(fract(t*0.2-g_realtime+d3*0.2)*max(0.0,1.0-d3*0.2));
 
-   oColour = vec4( vfrag+emit, 1.0 );
+   vfrag += emit;
+
+   if( uIsoAmt > 0.0 ){
+      float height = fract( aCo.y * 0.1 );
+      float lg = 2.0*length(vec2(dFdx(height), dFdy(height)));
+      vfrag *= 1.0f+(lg*0.4*uIsoAmt);
+   }
+
+
+   oColour = vec4( vfrag, 1.0 );
    //oColour = vec4( vfrag, 1.0 );
 }