All files / src/WebGL/core Color.ts

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export interface Colored {
  r: number;
  g: number;
  b: number;
  a?: number;
}
 
export type ColorConstructorArg = number | Color | Colored | undefined;
export class Color implements Colored {
  r: number = 0.0;
  g: number = 0.0;
  b: number = 0.0;
 
  constructor(r?: ColorConstructorArg, g?: number, b?: number) {
    if (arguments.length > 1 && typeof r === "number") {
      this.r = r || 0.0;
      this.g = g || 0.0;
      this.b = b || 0.0;
 
      return this;
    }
 
    return this.set(r || 0.0);
  }
 
  set<T extends Colored>(val: Color | number | T): Color {
    if (val instanceof Color) return val.clone();
    else if (typeof val === "number") this.setHex(val);
    else if (typeof val === "object") {
      this.r = val?.r || 0.0;
      this.g = val?.g || 0.0;
      this.b = val?.b || 0.0;
    }
    return this;
  }
 
  setHex(hex: number): Color {
    hex = Math.floor(hex);
 
    this.r = ((hex >> 16) & 255) / 255;
    this.g = ((hex >> 8) & 255) / 255;
    this.b = (hex & 255) / 255;
 
    return this;
  }
 
  getHex(): number {
    var R = Math.round(this.r * 255);
    var G = Math.round(this.g * 255);
    var B = Math.round(this.b * 255);
    return (R << 16) | (G << 8) | B;
  }
 
  clone(): Color {
    return new Color(this.r, this.g, this.b);
  }
 
  copy(color: Color): Color {
    this.r = color.r;
    this.g = color.g;
    this.b = color.b;
 
    return this;
  }
 
  //return object that represents color components from 0 to 255
  scaled<T extends Colored>(): Colored {
    var ret: Partial<T> = {};
    ret.r = Math.round(this.r * 255);
    ret.g = Math.round(this.g * 255);
    ret.b = Math.round(this.b * 255);
    ret.a = 1.0;
    return ret as T;
  }
}
 
// in an attempt to reduce memory overhead, cache all $3Dmol.Colors
// this makes things a little faster
export class CC {
  static rgbRegEx =
    /rgb(a?)\(\s*([^ ,\)\t]+)\s*,\s*([^ ,\)\t]+)\s*,\s*([^ ,\)\t]+)/i;
  static cache: Record<number, Color> = { 0: new Color(0) };
  static color(hex: undefined): Color;
  static color(hex: number): Color;
  static color(hex: number[]): Color[];
  static color(hex?: number | number[]) {
    // Undefined values default to black
    Iif (!hex) return CC.cache[0];
    // cache hits
    Iif (typeof hex === "number" && typeof CC.cache[hex] !== "undefined")
      return CC.cache[hex];
 
    // arrays
    Iif (hex && Array.isArray(hex))
      // parse elements recursively
      return hex.map(CC.color as (hex: number) => Color);
 
    // numbers and hex strings
    // @ts-ignore
    hex = CC.getHex(hex);
    Iif (typeof hex === "number") {
      var c = new Color(hex);
      CC.cache[hex] = c;
      return c;
    }
    // pass through $3Dmol.Color & other objects
    return hex;
  }
 
  static getHex(hex: Array<string|number>): number[];
  static getHex(hex: string | number): number;
  static getHex(hex) {
    Iif (Array.isArray(hex)) return hex.map(CC.getHex) as number[];
    Iif (typeof hex === "string") {
      Iif (!isNaN(parseInt(hex))) return parseInt(hex);
 
      hex = hex.trim();
 
      Iif (hex.length == 4 && hex[0] == "#") {
        hex = "#" + hex[1] + hex[1] + hex[2] + hex[2] + hex[3] + hex[3]; //expand to full hex number
      }
 
      Iif (hex.length == 7 && hex[0] == "#") {
        return parseInt(hex.substring(1), 16);
      }
 
      let m = CC.rgbRegEx.exec(hex);
      Iif (m) {
        Iif (m[1] != "") {
          console.log(
            "WARNING: Opacity value in rgba ignored.  Specify separately as opacity attribute."
          );
        }
        let ret = 0;
        for (let i = 2; i < 5; i++) {
          ret *= 256;
          // @ts-ignore
          let val = m[i].endsWith("%")
            ? (255 * parseFloat(m[i])) / 100
            : parseFloat(m[i]);
          ret += Math.round(val);
        }
        return ret;
      }
      return (window as any)?.$3Dmol?.htmlColors[hex.toLowerCase()] || 0x000000;
    }
    return hex;
  }
}