trease-tree-compiler/src/entities/sakura.ts at refs/heads/main · Trease-Focus/trease-tree-compiler

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import { createCanvas, CanvasRenderingContext2D } from 'canvas';

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

import { createHash, randomBytes } from 'crypto';

import * as fs from 'fs';

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

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

import type { Context } from 'baojs';

import type { ChildProcessWithoutNullStreams } from 'node:child_process';

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

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

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

class Vector2 {

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

}

interface Petal {

x: number; y: number;

size: number;

rotation: number;

velocity: Vector2;

active: boolean;

color: string;

}

interface Entity {

center: Vector2;

radius: number;

color: string;

secondaryColor: string;

distFromRoot: number;

rotation: number;

}

class Branch {

constructor(

public start: Vector2,

public end: Vector2,

public control: Vector2,

public strokeWidth: number,

public distFromRoot: number,

public length: number,

public children: Branch[] = [],

public entities: Entity[] = []

) { }

}

function drawPetalShape(ctx: CanvasRenderingContext2D, x: number, y: number, size: number, rotation: number) {

ctx.save();

ctx.translate(x, y);

ctx.rotate(rotation);

ctx.beginPath();

// A simple teardrop/heart-ish petal

ctx.moveTo(0, 0);

ctx.bezierCurveTo(-size, -size, -size / 2, -size * 1.5, 0, -size * 0.8);

ctx.bezierCurveTo(size / 2, -size * 1.5, size, -size, 0, 0);

ctx.fill();

ctx.restore();

}

function generateSakura(

rand: SeededRandom,

start: Vector2,

length: number,

angle: number,

depth: number,

dist: number,

bounds: { width: number, height: number },

scale: number

): Branch {

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

const end = new Vector2(

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

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

);

const margin = 50 * scale;

if (end.x < -margin || end.x > bounds.width + margin || end.y < -margin || end.y > bounds.height + margin) {

depth = 0;

}

const mid = new Vector2((start.x + end.x) / 2, (start.y + end.y) / 2);

const perp = (rand.next() - 0.5) * length * 0.4;

const control = new Vector2(

mid.x + Math.cos(rad + Math.PI / 2) * perp,

mid.y + Math.sin(rad + Math.PI / 2) * perp

);

const children: Branch[] = [];

const entities: Entity[] = [];

if (depth > 0) {

const numChildren = depth === 1 ? rand.nextInt(3, 5) : rand.nextInt(2, 3);

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

const newAngle = angle + rand.nextFloat(-35, 35);

const newLen = length * rand.nextFloat(0.7, 0.85);

children.push(generateSakura(rand, end, newLen, newAngle, depth - 1, dist + length, bounds, scale));

}

if (depth < 4) {

const clusterSize = rand.nextInt(5, 12);

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

const t = rand.nextFloat(0.5, 1.0); // Focus blossoms at tips

const pX = (1 - t) * (1 - t) * start.x + 2 * (1 - t) * t * control.x + t * t * end.x;

const pY = (1 - t) * (1 - t) * start.y + 2 * (1 - t) * t * control.y + t * t * end.y;

entities.push({

center: new Vector2(pX + rand.nextFloat(-20 * scale, 20 * scale), pY + rand.nextFloat(-20 * scale, 20 * scale)),

radius: rand.nextFloat(4 * scale, 8 * scale),

color: rand.next() > 0.3 ? '#FFD1DC' : '#FFF0F5', // Soft Pink / Lavender Blush

secondaryColor: '#FFB7C5',

distFromRoot: dist + (length * t),

rotation: rand.nextFloat(0, Math.PI * 2)

});

}

return new Branch(start, end, control, (depth * 2.5 + 1) * scale, dist, length, children, entities);

}

export class Sakura implements Generate {

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);

// Resolution independence

const scale = Math.min(CONFIG.width, CONFIG.height) / 1080;

const startY = CONFIG.height - (100 * scale);

const initialLength = 180 * scale;

// Position root at bottom center

const tree = generateSakura(rand, new Vector2(CONFIG.width / 2, startY), initialLength, -90, 7, 0, { width: CONFIG.width, height: CONFIG.height }, scale);

const fallingPetals: Petal[] = [];

const totalFrames = CONFIG.fps * CONFIG.durationSeconds;

const maxDist = 1500 * scale; // Estimated max growth distance

if(CONFIG.photoOnly){

const currentGrowthDist = maxDist * 1.2; // Set to final growth state

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

const t = f / totalFrames;

// --- SAKURA SNOW SYSTEM ---x

if (t > 0.4 && f % 5 === 0) { // Start dropping petals midway

const centerX = CONFIG.width / 2;

const centerY = CONFIG.height / 2;

const range = CONFIG.width * 0.2; // 20% of canvas width

fallingPetals.push({

x: rand.nextFloat(centerX - range, centerX + range),

y: rand.nextFloat(centerY - range, centerY + range),

size: rand.nextFloat(3 * scale, 12 * scale),

rotation: rand.nextFloat(0, Math.PI * 2),

velocity: new Vector2(rand.nextFloat(-1 * scale, 1 * scale), rand.nextFloat(1 * scale, 3 * scale)),

active: true,

color: 'rgba(255, 209, 220, 0.5)'

});

}

fallingPetals.forEach(p => {

if (!p.active) return;

p.x += p.velocity.x + Math.sin(f * 0.05) * 0.5; // Swaying motion

p.y += p.velocity.y;

p.rotation += 0.02;

if (p.y > CONFIG.height) p.active = false;

});

}

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

const renderBranch = (b: Branch) => {

if (currentGrowthDist < b.distFromRoot) return;

const progress = Math.min(1, (currentGrowthDist - b.distFromRoot) / b.length);

ctx.strokeStyle = '#3e2723';

ctx.lineWidth = b.strokeWidth;

ctx.lineCap = 'round';

ctx.beginPath();

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

const cpX = b.start.x + (b.control.x - b.start.x) * progress;

const cpY = b.start.y + (b.control.y - b.start.y) * progress;

const eX = b.start.x + (b.end.x - b.start.x) * progress;

const eY = b.start.y + (b.end.y - b.start.y) * progress;

ctx.quadraticCurveTo(cpX, cpY, eX, eY);

ctx.stroke();

if (progress > 0.8) {

b.entities.forEach(e => {

if (currentGrowthDist > e.distFromRoot + 50 * scale) {

ctx.fillStyle = e.color;

drawPetalShape(ctx, e.center.x, e.center.y, e.radius, e.rotation);

}

});

}

b.children.forEach(renderBranch);

};

renderBranch(tree);

fallingPetals.forEach(p => {

if (!p.active) return;

ctx.fillStyle = p.color;

drawPetalShape(ctx, p.x, p.y, p.size, p.rotation);

});

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

if(CONFIG.save_as_file){

fs.writeFileSync(CONFIG.imageFilename, buffer);

}

return {

imageBuffer: buffer,

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

trunkStartPosition: { x: CONFIG.width / 2, y: CONFIG.height - (100 * scale) }

};

}

const ffmpegArgs = getFFmpegArgs(CONFIG);

const ffmpeg = CONFIG.photoOnly ? null : spawn('ffmpeg', ffmpegArgs);

if(onStream && ffmpeg) onStream(ffmpeg, ffmpeg.stdout);

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

const t = f / totalFrames;

const currentGrowthDist = t * maxDist * 1.2;

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

const renderBranch = (b: Branch) => {

if (currentGrowthDist < b.distFromRoot) return;

const progress = Math.min(1, (currentGrowthDist - b.distFromRoot) / b.length);

// Draw Branch

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

ctx.lineWidth = b.strokeWidth;

ctx.lineCap = 'round';

ctx.beginPath();

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

// Simple quad curve for growth

const cpX = b.start.x + (b.control.x - b.start.x) * progress;

const cpY = b.start.y + (b.control.y - b.start.y) * progress;

const eX = b.start.x + (b.end.x - b.start.x) * progress;

const eY = b.start.y + (b.end.y - b.start.y) * progress;

ctx.quadraticCurveTo(cpX, cpY, eX, eY);

ctx.stroke();

// Draw Blossoms

if (progress > 0.8) {

b.entities.forEach(e => {

if (currentGrowthDist > e.distFromRoot + 50 * scale) {

ctx.fillStyle = e.color;

drawPetalShape(ctx, e.center.x, e.center.y, e.radius, e.rotation);

}

});

}

b.children.forEach(renderBranch);

};

renderBranch(tree);

if (t > 0.4 && f % 5 === 0) { // Start dropping petals midway

const centerX = CONFIG.width / 2;

const centerY = CONFIG.height / 2;

const rangeX = CONFIG.width * 0.2; // 20% of canvas width

const rangeY = CONFIG.width * 0.2; // 10% of canvas width

fallingPetals.push({

x: rand.nextFloat(centerX - rangeX, centerX + rangeX),

y: rand.nextFloat(centerY - rangeY, centerY + rangeY),

size: rand.nextFloat(3 * scale, 8 * scale),

rotation: rand.nextFloat(0, Math.PI * 2),

velocity: new Vector2(rand.nextFloat(-1 * scale, 1 * scale), rand.nextFloat(1 * scale, 3 * scale)),

active: true,

color: 'rgba(255, 209, 220, 0.8)'

});

}

fallingPetals.forEach(p => {

if (!p.active) return;

p.x += p.velocity.x + Math.sin(f * 0.05) * 0.5; // Swaying motion

p.y += p.velocity.y;

p.rotation += 0.02;

ctx.fillStyle = p.color;

drawPetalShape(ctx, p.x, p.y, p.size, p.rotation);

if (p.y > CONFIG.height) p.active = false;

});

if (ffmpeg) {

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

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

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

}

if (f % 30 === 0) console.log(`Rendering: ${Math.round(t * 100)}%`);

}

if(ffmpeg){

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: CONFIG.width / 2, y: CONFIG.height - (100 * scale) }

};

}

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

throw new Error('Method not implemented.');

}

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