trease-tree-compiler/src/entities/cedar.ts at main · Trease-Focus/trease-tree-compiler

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import { createCanvas, CanvasRenderingContext2D } from 'canvas';

import { spawn, type ChildProcessWithoutNullStreams, type ChildProcess } from 'child_process';

import * as fs from 'fs';

import { SeededRandom } from '../core/seeded-random';

import type { Color } from '../types/color';

import { DEFAULT_CONFIG, type Config } from '../types/config';

import type { Generate } from '../models/generate';

import type { GeneratorResult } from '../types/generator-result';

import type { Context } from 'baojs';

import { getFFmpegArgs } from '../core/ffmpeg-args';

import { buffer } from 'stream/consumers';

class Vector2 { constructor(public x: number, public y: number) {} }

interface Entity {

center: Vector2; radius: number;

baseColor: Color; highlightColor: Color;

distFromRoot: number; opacity?: number;

}

class Branch {

constructor(

public start: Vector2, public end: Vector2,

public strokeWidth: number, public control: Vector2,

public length: number, public distFromRoot: number,

public children: Branch[] = [], public entities: Entity[] = []

) {}

}

class SimpleBranch {

constructor(public start: Vector2, public end: Vector2, public strokeWidth: number, public control: Vector2) {}

}

interface Bounds { minX: number; maxX: number; minY: number; maxY: number; }

const coerceIn = (val: number, min: number, max: number) => Math.max(min, Math.min(val, max));

const smoothStep = (t: number): number => t * t * (3 - 2 * t);

function generateCedar(

rand: SeededRandom, start: Vector2, length: number, angle: number,

depth: number, currentDist: number, isTrunk: boolean = true

): Branch {

const radAngle = angle * (Math.PI / 180);

const end = new Vector2(

start.x + length * Math.cos(radAngle),

start.y + length * Math.sin(radAngle)

);

const midX = (start.x + end.x) / 2;

const midY = (start.y + end.y) / 2;

const offset = isTrunk ? rand.nextFloat(-12, 12) : rand.nextFloat(-25, 25);

const control = new Vector2(midX + offset, midY + offset);

if (isTrunk && depth === 8) {

console.log(`Trunk started at position: (${control.x}, ${control.y})`);

}

// EVEN BIGGER TRUNK: Significant base girth that tapers

const strokeWidth = isTrunk

? (depth * depth * 1.1) + 18

: (depth * 4) + 2;

const children: Branch[] = [];

const entities: Entity[] = [];

if (depth > 0) {

if (isTrunk) {

// Main vertical trunk

children.push(generateCedar(rand, end, length * 0.82, angle + rand.nextFloat(-6, 6), depth - 1, currentDist + length, true));

// Side tiers (horizontal)

const tierCount = rand.nextInt(2, 4);

for (let i = 0; i < tierCount; i++) {

const sideAngle = rand.next() > 0.5 ? rand.nextFloat(-15, 5) : 175 + rand.nextFloat(-5, 15);

children.push(generateCedar(rand, end, length * 0.7, sideAngle, depth - 2, currentDist + length, false));

}

} else {

// Lateral branching

if (depth > 2) {

children.push(generateCedar(rand, end, length * 0.65, angle + rand.nextFloat(-15, 15), depth - 1, currentDist + length, false));

}

// Foliage pads

if (depth <= 4) {

const leafCount = rand.nextInt(10, 40);

for (let i = 0; i < leafCount; i++) {

const rBase = 45 + rand.nextFloat(0, 20); // Slight natural warmth

const gBase = 110 + rand.nextFloat(0, 40); // Strongest channel (green)

const bBase = 30 + rand.nextFloat(0, 25); // Earthy greens

entities.push({

center: new Vector2(end.x + rand.nextFloat(-60, 60), end.y + rand.nextFloat(-25, 25)),

radius: rand.nextFloat(1, 10),

baseColor: { r: rBase, g: gBase, b: bBase, a: 1.0 },

highlightColor: { r: rBase + 40, g: gBase + 40, b: bBase + 40, a: 1.0 },

distFromRoot: currentDist + length + rand.nextFloat(0, 150)

});

}

return new Branch(start, end, strokeWidth, control, length, currentDist, children, entities);

}

function calculateBounds(b: Branch, cur: Bounds = { minX: Infinity, maxX: -Infinity, minY: Infinity, maxY: -Infinity }): Bounds {

[b.start, b.end, b.control].forEach(p => {

cur.minX = Math.min(cur.minX, p.x); cur.maxX = Math.max(cur.maxX, p.x);

cur.minY = Math.min(cur.minY, p.y); cur.maxY = Math.max(cur.maxY, p.y);

});

b.entities.forEach(e => {

cur.minX = Math.min(cur.minX, e.center.x - e.radius); cur.maxX = Math.max(cur.maxX, e.center.x + e.radius);

cur.minY = Math.min(cur.minY, e.center.y - e.radius); cur.maxY = Math.max(cur.maxY, e.center.y + e.radius);

});

b.children.forEach(c => calculateBounds(c, cur));

return cur;

}

function flattenTree(b: Branch, bList: SimpleBranch[], eList: Entity[], progress: number, scale: number, ox: number, oy: number) {

const ts = new Vector2(b.start.x * scale + ox, b.start.y * scale + oy);

const te = new Vector2(b.end.x * scale + ox, b.end.y * scale + oy);

const tc = new Vector2(b.control.x * scale + ox, b.control.y * scale + oy);

if (progress > b.distFromRoot) {

let localT = coerceIn((progress - b.distFromRoot) / b.length, 0, 1);

const omt = 1 - localT;

const curCx = omt * ts.x + localT * tc.x;

const curCy = omt * ts.y + localT * tc.y;

const q1x = omt * tc.x + localT * te.x;

const q1y = omt * tc.y + localT * te.y;

const curEx = omt * curCx + localT * q1x;

const curEy = omt * curCy + localT * q1y;

bList.push(new SimpleBranch(ts, new Vector2(curEx, curEy), b.strokeWidth * scale, new Vector2(curCx, curCy)));

b.entities.forEach(e => {

if (progress > e.distFromRoot) {

const g = coerceIn((progress - e.distFromRoot) / 200, 0, 1);

eList.push({ ...e, center: new Vector2(e.center.x * scale + ox, e.center.y * scale + oy), radius: e.radius * scale * smoothStep(g), opacity: g });

}

});

}

b.children.forEach(c => flattenTree(c, bList, eList, progress, scale, ox, oy));

}

export class Cedar implements Generate {

getInfo(config?: Config): Promise<GeneratorResult> {

if (!config) {

throw new Error('Config is required to get tree info.');

}

const rand = new SeededRandom(config.seed);

const fullTree = generateCedar(rand, new Vector2(0,0), 220, -90, 8, 0);

const bounds = calculateBounds(fullTree);

const treeW = bounds.maxX - bounds.minX;

const scale = Math.min((config.width - config.padding*2) / treeW, (config.height - config.padding*2) / (bounds.maxY - bounds.minY));

const offX = (config.width / 2) - ((bounds.minX + treeW/2) * scale);

const offY = (config.height - config.padding) - (bounds.maxY * scale);

return Promise.resolve({

trunkStartPosition: { x: offX, y: offY }

});

}

async generate(con: Context, onStream?:(process:ChildProcessWithoutNullStreams,videoStream:ChildProcessWithoutNullStreams['stdout']) => void, CONFIG: Config = DEFAULT_CONFIG): Promise<GeneratorResult> {

const canvas = createCanvas(CONFIG.width, CONFIG.height);

const ctx = canvas.getContext('2d');

const rand = new SeededRandom(CONFIG.seed);

console.log("📐 Planning perfect-fit cedar structure...");

const fullTree = generateCedar(rand, new Vector2(0,0), 220, -90, 8, 0);

const bounds = calculateBounds(fullTree);

// Auto-fit Logic

const treeW = bounds.maxX - bounds.minX;

const treeH = bounds.maxY - bounds.minY;

const scale = Math.min((CONFIG.width - CONFIG.padding*2) / treeW, (CONFIG.height - CONFIG.padding*2) / treeH);

const offX = (CONFIG.width / 2) - ((bounds.minX + treeW/2) * scale);

const offY = (CONFIG.height - CONFIG.padding) - (bounds.maxY * scale);

if (CONFIG.photoOnly) {

console.log("📸 Generating final cedar image only (video creation skipped).");

const progress = 3500;

ctx.clearRect(0, 0, CONFIG.width, CONFIG.height);

const branches: SimpleBranch[] = [];

const entities: Entity[] = [];

flattenTree(fullTree, branches, entities, progress, scale, offX, offY);

// Draw Bark

ctx.lineCap = 'round';

ctx.strokeStyle = '#3e2723'; // Dark bark

branches.forEach(b => {

ctx.beginPath();

ctx.lineWidth = b.strokeWidth;

ctx.moveTo(b.start.x, b.start.y);

ctx.quadraticCurveTo(b.control.x, b.control.y, b.end.x, b.end.y);

ctx.stroke();

});

// Draw Foliage Ellipses

entities.sort((a,b) => a.center.y - b.center.y);

entities.forEach(e => {

ctx.globalAlpha = e.opacity || 0;

const g = ctx.createRadialGradient(e.center.x, e.center.y - e.radius*0.3, 0, e.center.x, e.center.y, e.radius);

g.addColorStop(0, `rgb(${e.highlightColor.r},${e.highlightColor.g},${e.highlightColor.b})`);

g.addColorStop(1, `rgb(${e.baseColor.r},${e.baseColor.g},${e.baseColor.b})`);

ctx.fillStyle = g;

ctx.beginPath();

ctx.ellipse(e.center.x, e.center.y, e.radius * 1.6, e.radius, 0, 0, Math.PI * 2);

ctx.fill();

});

ctx.globalAlpha = 1.0;

const finalBuffer = canvas.toBuffer('image/png');

if (CONFIG.save_as_file) {

fs.writeFileSync(CONFIG.imageFilename, finalBuffer);

}

console.log(`\n✅ Image generation complete!`);

return {

imageBuffer: finalBuffer,

imagePath: CONFIG.save_as_file ? CONFIG.imageFilename : undefined,

trunkStartPosition: { x: offX, y: offY }

};

}

const ffmpegArgs = getFFmpegArgs(CONFIG);

const ffmpeg = spawn('ffmpeg', ffmpegArgs);

if (onStream) {

onStream(ffmpeg, ffmpeg.stdout);

}

const totalFrames = CONFIG.durationSeconds * CONFIG.fps;

const maxGrowth = 3500;

for (let f = 0; f <= totalFrames; f++) {

const progress = (f / totalFrames) * maxGrowth;

ctx.clearRect(0, 0, CONFIG.width, CONFIG.height);

const branches: SimpleBranch[] = [];

const entities: Entity[] = [];

flattenTree(fullTree, branches, entities, progress, scale, offX, offY);

// Draw Bark

ctx.lineCap = 'round';

ctx.strokeStyle = '#3e2723'; // Dark bark

branches.forEach(b => {

ctx.beginPath();

ctx.lineWidth = b.strokeWidth;

ctx.moveTo(b.start.x, b.start.y);

ctx.quadraticCurveTo(b.control.x, b.control.y, b.end.x, b.end.y);

ctx.stroke();

});

// Draw Foliage Ellipses

entities.sort((a,b) => a.center.y - b.center.y);

entities.forEach(e => {

ctx.globalAlpha = e.opacity || 0;

const g = ctx.createRadialGradient(e.center.x, e.center.y - e.radius*0.3, 0, e.center.x, e.center.y, e.radius);

g.addColorStop(0, `rgb(${e.highlightColor.r},${e.highlightColor.g},${e.highlightColor.b})`);

g.addColorStop(1, `rgb(${e.baseColor.r},${e.baseColor.g},${e.baseColor.b})`);

ctx.fillStyle = g;

ctx.beginPath();

ctx.ellipse(e.center.x, e.center.y, e.radius * 1.6, e.radius, 0, 0, Math.PI * 2);

ctx.fill();

});

ctx.globalAlpha = 1.0;

const buffer = canvas.toBuffer('image/png');

const ok = ffmpeg.stdin.write(buffer);

if (!ok) await new Promise(resolve => ffmpeg.stdin.once('drain', resolve));

}

ffmpeg.stdin.end();

// Wait for FFmpeg to finish encoding

await new Promise<void>((resolve, reject) => {

(ffmpeg as any).on('close', (code: number | null) => {

if (code === 0) resolve();

else reject(new Error(`FFmpeg exited with code ${code}`));

});

(ffmpeg as any).on('error', reject);

});

return {

videoPath: CONFIG.filename,

trunkStartPosition: { x: offX, y: offY }

};

}

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