From ac44e5f15eb8682ff80b15acb8e5c6f9f489c45a Mon Sep 17 00:00:00 2001
From: David Allemang <david.allemang@kitware.com>
Date: Mon, 27 Jul 2026 11:20:26 -0400
Subject: [PATCH] some details about BED

---
 content/interference-fixes.typ | 112 +++++++++++++++++++++++++++++++++
 src/engine.js                  |   2 +-
 2 files changed, 113 insertions(+), 1 deletion(-)

diff --git a/content/interference-fixes.typ b/content/interference-fixes.typ
index 474a1cc5..94f507d8 100644
--- a/content/interference-fixes.typ
+++ b/content/interference-fixes.typ
@@ -206,6 +206,11 @@ cmp rep rep cmp cmp rep rep
 
 == Block Event Delay
 
+Block Event Delay is not a complete substitute for tilesets, but it can significantly reduce the
+required length of tilesets. It is based on a behavior of piston push lists which repeats a given
+global order for multiple components. A smaller tileset can set a 'template' ordering for a few
+components, then BED can trivially 'repeat' that order for a subsequent set of components.
+
 #show raw.where(lang: "mc-diorama"): it => diorama(
   autoplay: true,
   loop: true,
@@ -321,4 +326,111 @@ t 20
 p 0 0 0
 ```
 
+#show raw.where(lang: "mc-diorama"): it => diorama(
+  autoplay: true,
+  loop: true,
+  radius: 5,
+  theta: 180,
+  phi: 0,
+  it.text,
+)
+
+```
+prefix | BED -->
+    00 | A D G ...
+    01 | B E H ...
+    10 | C F I ...
+```
+
+#show raw.where(lang: "mc-diorama"): it => diorama(
+  autoplay: true,
+  loop: true,
+  radius: 9,
+  phi:30,
+  theta: 110,
+  it.text,
+)
+
+```mc-diorama
+
+p 0  0  0 light_gray_terracotta
+p 1  0  0 light_gray_terracotta
+p 2  0  0 light_gray_terracotta
+p 3  0  0 light_gray_terracotta
+p 4  0  0 light_gray_terracotta
+p -1 -1 0 smooth_stone_slab type=top
+p -2 -1 0 smooth_stone_slab type=top
+p -3 -1 0 smooth_stone_slab type=top
+p 0  1  0 redstone_wire east=side west=side power=0
+p 1  1  0 redstone_wire east=side west=side power=0
+p 2  1  0 redstone_wire east=side west=side power=0
+p 3  1  0 redstone_wire east=side west=side power=0
+p 4  1  0 redstone_wire east=side west=side power=0
+p 0 -1 -1 piston facing=up extended=false
+p 1 -1 -1 piston facing=up extended=false
+p 2 -1 -1 piston facing=up extended=false
+p 3 -1 -1 piston facing=up extended=false
+p 4  0 -1 piston facing=down extended=false
+p 0  0 -2 observer facing=south powered=false
+p 1  0 -2 observer facing=south powered=false
+p 2  0 -2 observer facing=south powered=false
+p 3  0 -2 observer facing=south powered=false
+p -1 0  0 observer facing=west powered=false
+p -2 0 0 repeater facing=west powered=false locked=false delay=1
+p -3 0 0 repeater facing=west powered=false locked=false delay=1
+
+p 0  0  4 cyan_terracotta
+p 1  0  4 cyan_terracotta
+p 2  0  4 cyan_terracotta
+p 3  0  4 cyan_terracotta
+p 4  0  4 cyan_terracotta
+p -1 -1 4 smooth_stone_slab type=top
+p -2 -1 4 smooth_stone_slab type=top
+p -3 -1 4 smooth_stone_slab type=top
+p 0  1  4 redstone_wire east=side west=side power=0
+p 1  1  4 redstone_wire east=side west=side power=0
+p 2  1  4 redstone_wire east=side west=side power=0
+p 3  1  4 redstone_wire east=side west=side power=0
+p 4  1  4 redstone_wire east=side west=side power=0
+p 0 -1  3 piston facing=up extended=false
+p 1 -1  3 piston facing=up extended=false
+p 2 -1  3 piston facing=up extended=false
+p 3 -1  3 piston facing=up extended=false
+p 4  0  3 piston facing=down extended=false
+p 0  0  2 observer facing=south powered=false
+p 1  0  2 observer facing=south powered=false
+p 2  0  2 observer facing=south powered=false
+p 3  0  2 observer facing=south powered=false
+p -1 0  4 observer facing=west powered=false
+p -2 0 4 repeater facing=west powered=false locked=false delay=1
+p -3 0 4 comparator facing=west powered=false mode=compare
+
+p 0  0  8 white_terracotta
+p 1  0  8 white_terracotta
+p 2  0  8 white_terracotta
+p 3  0  8 white_terracotta
+p 4  0  8 white_terracotta
+p 5 -1 8 smooth_stone_slab type=top
+p 6 -1 8 smooth_stone_slab type=top
+p 7 -1 8 smooth_stone_slab type=top
+p 0  1  8 redstone_wire east=side west=side power=0
+p 1  1  8 redstone_wire east=side west=side power=0
+p 2  1  8 redstone_wire east=side west=side power=0
+p 3  1  8 redstone_wire east=side west=side power=0
+p 4  1  8 redstone_wire east=side west=side power=0
+p 0 -1  7 piston facing=up extended=false
+p 1 -1  7 piston facing=up extended=false
+p 2 -1  7 piston facing=up extended=false
+p 3 -1  7 piston facing=up extended=false
+p 4  0  7 piston facing=down extended=false
+p 0  0  6 observer facing=south powered=false
+p 1  0  6 observer facing=south powered=false
+p 2  0  6 observer facing=south powered=false
+p 3  0  6 observer facing=south powered=false
+p 5 0  8 observer facing=east powered=false
+p 6 0 8 comparator facing=east powered=false mode=compare
+p 7 0 8 repeater facing=east powered=false locked=false delay=1
+
+```
+
 == Single-Priority Loops
diff --git a/src/engine.js b/src/engine.js
index 527b1507..0ca3b783 100644
--- a/src/engine.js
+++ b/src/engine.js
@@ -398,7 +398,7 @@ export class Engine {
                 const viewProj = diorama.updateMatrices(aspect);
 
                 gl.uniformMatrix4fv(this.uniforms.viewProj, false, viewProj);
-                gl.uniform3f(this.uniforms.lightDir, 1.0, 3.0, 2.0);
+                gl.uniform3f(this.uniforms.lightDir, 1.0, 3.0, -2.0);
                 gl.uniform3f(this.uniforms.viewDir, diorama.viewDir[0], diorama.viewDir[1], diorama.viewDir[2]);
                 gl.uniform3f(this.uniforms.upDir, diorama.upDir[0], diorama.upDir[1], diorama.upDir[2]);