feat: lab utilites and fix

lab/forge_project.cfg

@@ -83,7 +83,7 @@ TAP_TEMPO=46
 # === GROUP INPUT STATES
 GROUP_COUNT=3
 
-GROUP_1_COUNT=1
+GROUP_1_COUNT=6
 GROUP_1_1_X=33
 GROUP_1_1_Y=49
 GROUP_1_1_Z=65
@@ -103,7 +103,7 @@ GROUP_1_6_X=3
 GROUP_1_6_Y=19
 GROUP_1_6_Z=
 
-GROUP_2_COUNT=1
+GROUP_2_COUNT=7
 GROUP_2_1_X=37
 GROUP_2_1_Y=53
 GROUP_2_1_Z=69

lab/frag1.example.glsl

@@ -26,8 +26,6 @@ vec4 src_stage(vec2 vUV, int seed, vec3 b1, vec2 f1, vec3 b2, vec2 f2, vec3 b3,
 
     // logic
 
-    // logic
-
     vec3 c = vec3(uv1.x, uv1.y, cos(iBeats) * 0.5 + 0.5);
 
     // output

lab/frag3.example.glsl

@@ -1,10 +1,17 @@
 #version 460
 
+#include inc_write.glsl
+
 in vec2 vUV;
 out vec4 fragColor;
 
 uniform sampler2D iTex0;
+uniform int iFPS;
 
 void main() {
-    fragColor = texture(iTex0, vUV);
-}
+    vec4 color = texture(iTex0, vUV);
+
+    color = mix(color, 1. - color, write_int_left(vUV * 20., vec2(1., 1.), min(120, iFPS), 3));
+
+    fragColor = color;
+}