From 6db9f5be6c86af64226d21f220bb7795405c5196 Mon Sep 17 00:00:00 2001
From: Aaron Fenyes <aaron.fenyes@fareycircles.ooo>
Date: Wed, 28 Aug 2024 17:14:55 -0700
Subject: [PATCH] Enlarge the test construction to six spheres

In debug mode, assign most of the color scale to even layer counts. Odd
layer counts are topologically prohibited, so we should rarely see bugs
severe enough to produce them.
---
 app-proto/inversive-display/src/inversive.frag | 12 +++++++++---
 app-proto/inversive-display/src/main.rs        |  8 +++++++-
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/app-proto/inversive-display/src/inversive.frag b/app-proto/inversive-display/src/inversive.frag
index fbb60f6..7eb16b5 100644
--- a/app-proto/inversive-display/src/inversive.frag
+++ b/app-proto/inversive-display/src/inversive.frag
@@ -173,11 +173,17 @@ void main() {
     if (debug_mode) {
         // at the bottom of the screen, show the color scale instead of the
         // layer count
-        if (gl_FragCoord.y < 10.) layer_cnt = int(8. * gl_FragCoord.x / resolution.x);
+        if (gl_FragCoord.y < 10.) layer_cnt = 2 * int(8. * gl_FragCoord.x / resolution.x);
         
         // convert number to color
-        ivec3 bits = layer_cnt / ivec3(1, 2, 4);
-        outColor = vec4(mod(vec3(bits), 2.), 1.);
+        vec3 color;
+        if (layer_cnt % 2 == 0) {
+            ivec3 bits = layer_cnt / ivec3(2, 4, 8);
+            color = mod(vec3(bits), 2.);
+        } else {
+            color = vec3(0.5);
+        }
+        outColor = vec4(color, 1.);
         return;
     }
     
diff --git a/app-proto/inversive-display/src/main.rs b/app-proto/inversive-display/src/main.rs
index 1855ce2..f5b42c5 100644
--- a/app-proto/inversive-display/src/main.rs
+++ b/app-proto/inversive-display/src/main.rs
@@ -132,7 +132,10 @@ fn main() {
             let color_vec = vec![
                 [1.00_f32, 0.25_f32, 0.00_f32],
                 [0.00_f32, 0.25_f32, 1.00_f32],
-                [0.25_f32, 0.00_f32, 1.00_f32]
+                [0.25_f32, 0.00_f32, 1.00_f32],
+                [0.25_f32, 1.00_f32, 0.00_f32],
+                [0.75_f32, 0.75_f32, 0.00_f32],
+                [0.00_f32, 0.75_f32, 0.50_f32],
             ];
             
             // timing
@@ -292,6 +295,9 @@ fn main() {
                     sphere_vec.push(&construction_to_world * engine::sphere(0.5, 0.5, ctrl_x.get(), radius_x.get()));
                     sphere_vec.push(&construction_to_world * engine::sphere(-0.5, -0.5, ctrl_y.get(), radius_y.get()));
                     sphere_vec.push(&construction_to_world * engine::sphere(-0.5, 0.5, 0.0, 0.75));
+                    sphere_vec.push(&construction_to_world * engine::sphere(0.5, -0.5, 0.0, 0.5));
+                    sphere_vec.push(&construction_to_world * engine::sphere(0.0, 0.15, 1.0, 0.25));
+                    sphere_vec.push(&construction_to_world * engine::sphere(0.0, -0.15, -1.0, 0.25));
                     
                     // set the resolution
                     let width = canvas.width() as f32;