First stabby stab

(cherry picked from commit 300e6cec5fb57ef15b7f4339750f58f522e8a799)

src/substrate.ts

@@ -0,0 +1,78 @@
+// TS attempt of http://www.complexification.net/gallery/machines/substrate/index.php by laniaung.me 2025-06-02
+export default class Substrate {
+    private colors = [ 0x3a1e3e, 0x7c2d3b, 0xb94f3c, 0xf4a462, 0xf9c54e ] // https://colormagic.app/palette/671eeb6c42273fc4c1bb1ac7
+    private maxCracks = 20
+
+    constructor(maxCracks: number) {
+        this.maxCracks = maxCracks
+    }
+}
+
+class State {
+    crackGrid: number[]
+    height: number
+    width: number
+
+    constructor(height: number, width: number) {
+        this.height = height
+        this.width = width
+        this.crackGrid = []
+
+        for (let x = 0; x < width; x++) {
+            for (let y = 0; y < height; y++) {
+                this.crackGrid[y * width + x] = 10000
+            }
+        }
+
+        for (let i = 0; i < 16; i++) {
+            this.crackGrid[Math.floor(Math.random() * (height * width))] = Math.ceil(Math.random() * 360)
+        }
+    }
+}
+
+class SandPainter {
+}
+
+class Crack {
+    private x: number = 0
+    private y: number = 0
+    private angle: number = 0
+    private painter: SandPainter
+    private state: State
+
+    constructor(state: State) {
+        this.painter = new SandPainter()
+        this.state = state
+        this.init()
+    }
+
+    init() {
+        let x = 0, y = 0, found = false, tries = 0
+        while (!found && tries++ < 1000) {
+            x = Math.random() * this.state.width
+            y = Math.random() * this.state.height
+            found = this.state.crackGrid[y * this.state.height + x] < 10000
+        }
+
+        if (!found) {
+            console.warn("Unable to start crack due to timeout")
+            return
+        }
+
+        const negative = Math.random() < 0.5
+        let value = this.state.crackGrid[y * this.state.height + x]
+
+        if (negative) value -= 90 + Math.floor(Math.random() * 4.1 - 2)
+        else value += 90 + Math.floor(Math.random() * 4.1 - 2)
+    }
+
+    start(x: number, y: number, angle: number) {
+        this.x = x + .61 * Math.cos(angle * Math.PI / 180)
+        this.y = y + .61 * Math.sin(angle * Math.PI / 180)
+        this.angle = angle
+    }
+
+    continue() {
+
+    }
+}