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art/SouptikWave/index.js

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+/*
+@title: Waves
+@author: souptik samanta
+@snapshot: snapshot1.png
+*/
+const GRID_UNIT = 6;
+const FORCE_MAG = 3;
+const DOC_W = 150;
+const DOC_H = 150;
+const MAX_ITERATIONS = 100;
+const STEP_SIZE = 1;
+const CURVE_SPACING = 4;
+
+let vectorField = [];
+const seedValue = Date.now();
+
+function mapValue(value, inStart, inEnd, outStart, outEnd, clamp = false) {
+    let mapped = outStart + ((value - inStart) * (outEnd - outStart)) / (inEnd - inStart);
+    if (clamp) mapped = Math.max(outStart, Math.min(mapped, outEnd));
+    return mapped;
+}
+
+function computeAngle(x, y) {
+    const offset = Math.sin(seedValue * 0.0001 + x * 0.1) + Math.cos(seedValue * 0.0001 + y * 0.1);
+    return mapValue(offset * 0.5, -1, 1, 0, Math.PI * 2);
+}
+
+function initializeGrid(width, height, angleFn) {
+    setDocDimensions(width, height);
+    for (let i = 0; i < width / GRID_UNIT; i++) {
+        vectorField[i] = [];
+        for (let j = 0; j < height / GRID_UNIT; j++) {
+            const angle = angleFn(i * GRID_UNIT, j * GRID_UNIT);
+            vectorField[i][j] = new Vector(FORCE_MAG, angle, false);
+        }
+    }
+}
+
+function generateCurves() {
+    for (let x = 0; x < DOC_W; x += CURVE_SPACING) {
+        for (let y = 0; y < DOC_H; y += CURVE_SPACING) {
+            renderCurve(MAX_ITERATIONS, STEP_SIZE, new Coord(x, y));
+        }
+    }
+}
+
+function renderCurve(iterations, stepDist, start) {
+    let pathPoints = [];
+    let position = start;
+
+    for (let i = 0; i < iterations; i++) {
+        const col = Math.floor(position.x / GRID_UNIT);
+        const row = Math.floor(position.y / GRID_UNIT);
+
+        if (row < 0 || row >= vectorField.length || col < 0 || col >= vectorField[0].length) break;
+
+        pathPoints.push(position.toArray());
+        const angle = vectorField[col][row].angle;
+        position.x += stepDist * Math.cos(angle);
+        position.y += stepDist * Math.sin(angle);
+
+        if (position.x < 0 || position.x >= DOC_W || position.y < 0 || position.y >= DOC_H) break;
+    }
+
+    if (pathPoints.length > 2) {
+        const curve = [bt.nurbs(pathPoints, { steps: 200, degree: 2 })];
+        drawLines(curve, { width: 1, stroke: "#000000" });
+    }
+}
+
+class Coord {
+    constructor(x, y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    angleTo(other) {
+        const deltaY = other.y - this.y;
+        const deltaX = other.x - this.x;
+        return Math.atan2(deltaY, deltaX);
+    }
+
+    toArray() {
+        return [this.x, this.y];
+    }
+}
+
+class Vector {
+    constructor(magnitude, angle, degrees = true) {
+        if (degrees) angle *= Math.PI / 180;
+        this.x = magnitude * Math.cos(angle);
+        this.y = magnitude * Math.sin(angle);
+        this.magnitude = magnitude;
+        this.angle = angle;
+    }
+
+    drawVector(x = 0, y = 0) {
+        const lineSegment = [
+            [x, y],
+            [x + this.x, y + this.y]
+        ];
+        drawLines([lineSegment], { width: 1, stroke: "#000000" });
+    }
+}
+
+class LineStyle {
+    constructor(thickness, color) {
+        this.thickness = thickness;
+        this.color = color;
+    }
+
+    applyToPath(path) {
+        drawLines([path], { width: this.thickness, stroke: this.color });
+    }
+}
+
+function buildLayeredPaths(numLayers, layerSpacing, customThickness) {
+    for (let layer = 0; layer < numLayers; layer++) {
+        const offset = layer * layerSpacing;
+        for (let x = offset; x < DOC_W; x += CURVE_SPACING) {
+            for (let y = offset; y < DOC_H; y += CURVE_SPACING) {
+                const customPath = traceLayeredPath(MAX_ITERATIONS, STEP_SIZE, new Coord(x, y), layer, customThickness);
+                const style = new LineStyle(layer + 1, "#000000");
+                style.applyToPath(customPath);
+            }
+        }
+    }
+}
+
+function traceLayeredPath(maxSteps, moveLength, startPos, layerIndex, thickness) {
+    let pointPath = [];
+    let currentPos = startPos;
+
+    for (let step = 0; step < maxSteps; step++) {
+        const col = Math.floor(currentPos.x / GRID_UNIT);
+        const row = Math.floor(currentPos.y / GRID_UNIT);
+
+        if (row < 0 || row >= vectorField.length || col < 0 || col >= vectorField[0].length) break;
+
+        pointPath.push(currentPos.toArray());
+        const directionalAngle = vectorField[col][row].angle + layerIndex * 0.01;
+        currentPos.x += moveLength * Math.cos(directionalAngle);
+        currentPos.y += moveLength * Math.sin(directionalAngle);
+
+        if (currentPos.x < 0 || currentPos.x >= DOC_W || currentPos.y < 0 || currentPos.y >= DOC_H) break;
+    }
+
+    return pointPath;
+}
+
+function randomizeGridValues(seedBase) {
+    for (let i = 0; i < vectorField.length; i++) {
+        for (let j = 0; j < vectorField[i].length; j++) {
+            const modAngle = computeAngle(seedBase + i, seedBase + j);
+            vectorField[i][j].angle = modAngle;
+        }
+    }
+}
+
+function generatePatterns(seedModifier) {
+    randomizeGridValues(seedModifier);
+    initializeGrid(DOC_W, DOC_H, computeAngle);
+    buildLayeredPaths(3, 2, 1.5);
+}
+
+initializeGrid(DOC_W, DOC_H, computeAngle);
+generateCurves();
+generatePatterns(50);