cn-py/static/assets/data/libraries/p5.patgrad.js

p5.Gradient = class {
  constructor() {}

  setAngle(angle) {
    if (_angleMode === "degrees") {
      this.angle = radians(angle);
    } else {
      this.angle = angle;
    }
  }

  colors() {
    let stops;

    if (Array.isArray(arguments[0])) {
      stops = arguments[0];
    } else {
      stops = arguments;
    }

    for (let i = 0; i < stops.length; i += 2) {
      const pos = stops[i];
      const col = stops[i + 1].toString();
      this.gradient.addColorStop(pos, col);
    }
  }
};

p5.LinearGradient = class LinearGradient extends p5.Gradient {
  constructor(angle, width) {
    super();
    this.setAngle(angle || 0);
    this.width = width || 100;

    const x = cos(this.angle) * this.width;
    const y = sin(this.angle) * this.width;

    this.gradient = drawingContext.createLinearGradient(0, 0, x, y);
  }
};

p5.RadialGradient = class RadialGradient extends p5.Gradient {
  constructor(innerRadius, outerRadius, x, y) {
    super();
    this.innerRadius = innerRadius || 0;
    this.outerRadius = outerRadius || 100;
    this.x = x || 0;
    this.y = y || 0;

    this.gradient = drawingContext.createRadialGradient(
      this.x,
      this.y,
      this.innerRadius,
      this.x,
      this.y,
      this.outerRadius
    );
  }
};

p5.ConicGradient = class ConicGradient extends p5.Gradient {
  constructor(angle, x, y) {
    super();
    this.setAngle(angle || 0);
    this.x = x || 0;
    this.y = y || 0;

    this.gradient = drawingContext.createConicGradient(this.angle, this.x, this.y);
  }
};

p5.prototype.createLinearGradient = function (angle, width) {
  return new p5.LinearGradient(angle, width);
};

p5.prototype.createConicGradient = function (angle, x, y) {
  return new p5.ConicGradient(angle, x, y);
};

p5.prototype.createRadialGradient = function (innerRadius, outerRadius, x, y) {
  return new p5.RadialGradient(innerRadius, outerRadius, x, y);
};

p5.prototype.fillGradient = function (gradient) {
  this.drawingContext.fillStyle = gradient.gradient ? gradient.gradient : gradient;
};

p5.prototype.strokeGradient = function (gradient) {
  this.drawingContext.strokeStyle = gradient.gradient ? gradient.gradient : gradient;
};

p5.prototype.backgroundGradient = function (gradient) {
  this.drawingContext.fillStyle = gradient.gradient ? gradient.gradient : gradient;
  this.drawingContext.fillRect(0, 0, this.width, this.height);
};

p5.prototype.createPattern = function (patternElement, repeat) {
  if (patternElement.canvas) {
    patternElement = patternElement.canvas;
  } else if (patternElement.elt) {
    patternElement = patternElement.elt;
  }
  return this.drawingContext.createPattern(patternElement, repeat || "repeat");
};

p5.prototype.createSimplePattern = (func, w, h, repeat) => {
  let buffer = this.createGraphics(w || 5, h || 5);
  buffer.pixelDensity(1);
  buffer.background(255);
  func(buffer);
  return this.drawingContext.createPattern(buffer.canvas, repeat || "repeat");
};

p5.prototype.fillPattern = function (pattern) {
  this.drawingContext.fillStyle = pattern;
};

p5.prototype.strokePattern = function (pattern) {
  this.drawingContext.strokeStyle = pattern;
};

p5.prototype.backgroundPattern = function (pattern) {
  this.drawingContext.fillStyle = pattern;
  this.drawingContext.fillRect(0, 0, width, height);
};