240227a - OpenProcessing

mySketch
xxxxxxxxxx
 
let font;
let morphing;
let str_arr = "怎么回事";
​
function preload() {
  font = loadFont("NotoSansJP-SemiBold.ttf");
}
​
function setup() {
  createCanvas(800, 800);
  str_arr = stringToArray(str_arr);
  let char1 = str_arr[3];
  let char2 = str_arr[0];
  morphing = new MorphingTypography(char1, char2,-1, font, width / 2, height / 2, 800);
}
​
function draw() {
  background(255);
  morphing.update();
  morphing.display();
}
​
class MorphingTypography {
  constructor(char1, char2,n, font, centerX, centerY, fontSize) {
    this.char1 = char1;
    this.char2 = char2;
    this.n = n;
    this.font = font;
    this.centerX = centerX;
    this.centerY = centerY;
    this.fontSize = fontSize;
    this.morph = 0;
    this.morphValue;
​
    this.points1 = this.font.textToPoints(this.char1, 0, 0, this.fontSize, {
      sampleFactor: 0.25
    });
    this.points2 = this.font.textToPoints(this.char2, 0, 0, this.fontSize, {
      sampleFactor: 0.25
    });
​
    this.bounds1 = font.textBounds(this.char1, 0, 0, this.fontSize);
    this.bounds2 = font.textBounds(this.char2, 0, 0, this.fontSize);
  }
​
  update() {
    this.morph += 0.01;
    if (this.morph > 2) {
      this.morph = 0;
        this.char1 = str_arr[(this.n+1)%str_arr.length];
        this.char2 = str_arr[(this.n+2)%str_arr.length];
        this.n++;
      this.points1 = this.font.textToPoints(this.char1, 0, 0, this.fontSize, {
        sampleFactor: 0.25
      });
      this.points2 = this.font.textToPoints(this.char2, 0, 0, this.fontSize, {
        sampleFactor: 0.25
      });
      this.bounds1 = font.textBounds(this.char1, 0, 0, this.fontSize);
      this.bounds2 = font.textBounds(this.char2, 0, 0, this.fontSize);
    }
  }
​
  display() {
    fill(0);
    noStroke();
    // this.morphValue = Easing.easeOutElastic(this.morph);
​
    let boundsLerp = {
      x: lerp(this.bounds1.x, this.bounds2.x, this.morph),
      y: lerp(this.bounds1.y, this.bounds2.y, this.morph),
      w: lerp(this.bounds1.w, this.bounds2.w, this.morph),
      h: lerp(this.bounds1.h, this.bounds2.h, this.morph)
    };
​
    let offsetX = this.centerX - boundsLerp.w / 2 - boundsLerp.x;
    let offsetY = this.centerY - boundsLerp.h / 2 - boundsLerp.y;
​
    let maxPoints = max(this.points1.length, this.points2.length);
    // beginShape();
    for (let i = 0; i < maxPoints; i++) {
      let t = this.morph;
      t = Easing.easeOutElastic(t);
      let pt1 = this.points1[i % this.points1.length];
      let pt2 = this.points2[i % this.points2.length];
      let x = lerp(pt1.x, pt2.x, t) + offsetX;
      let y = lerp(pt1.y, pt2.y, t) + offsetY;
      rect(x, y, 5, 5);
      // vertex(x,y);
    }
    // endShape();
  }
}
class Easing {
  static easeInSine(x) {
    return 1 - Math.cos((x * Math.PI) / 2);
  }
​
  static easeOutSine(x) {
    return Math.sin((x * Math.PI) / 2);
  }
​
  static easeInOutSine(x) {
    return -(Math.cos(Math.PI * x) - 1) / 2;
  }
​
  static easeInQuad(x) {
    return x * x;
  }
​
  static easeOutQuad(x) {
    return 1 - (1 - x) * (1 - x);
  }
​
  static easeInOutQuad(x) {
    return x < 0.5 ? 2 * x * x : 1 - Math.pow(-2 * x + 2, 2) / 2;
  }
​
  static easeInCubic(x) {
    return x * x * x;
  }
​
  static easeOutCubic(x) {
    return 1 - Math.pow(1 - x, 3);
  }
​
  static easeInOutCubic(x) {
    return x < 0.5 ? 4 * x * x * x : 1 - Math.pow(-2 * x + 2, 3) / 2;
  }
​
  static easeInQuart(x) {
    return x * x * x * x;
  }
​
  static easeOutQuart(x) {
    return 1 - Math.pow(1 - x, 4);
  }
​
  static easeInOutQuart(x) {
    return x < 0.5 ? 8 * x * x * x * x : 1 - Math.pow(-2 * x + 2, 4) / 2;
  }
​
  static easeInQuint(x) {
    return x * x * x * x * x;
  }
​
  static easeOutQuint(x) {
    return 1 - Math.pow(1 - x, 5);
  }
​
  static easeInOutQuint(x) {
    return x < 0.5 ? 16 * x * x * x * x * x : 1 - Math.pow(-2 * x + 2, 5) / 2;
  }
​
  static easeInExpo(x) {
    return x === 0 ? 0 : Math.pow(2, 10 * x - 10);
  }
​
  static easeOutExpo(x) {
    return x === 1 ? 1 : 1 - Math.pow(2, -10 * x);
  }
​
  static easeInOutExpo(x) {
    return x === 0 ?
      0 :
      x === 1 ?
      1 :
      x < 0.5 ?
      Math.pow(2, 20 * x - 10) / 2 :
      (2 - Math.pow(2, -20 * x + 10)) / 2;
  }
​
  static easeInCirc(x) {
    return 1 - Math.sqrt(1 - Math.pow(x, 2));
  }
​
  static easeOutCirc(x) {
    return Math.sqrt(1 - Math.pow(x - 1, 2));
  }
​
  static easeInOutCirc(x) {
    return x < 0.5 ?
      (1 - Math.sqrt(1 - Math.pow(2 * x, 2))) / 2 :
      (Math.sqrt(1 - Math.pow(-2 * x + 2, 2)) + 1) / 2;
  }
​
  static easeInBack(x) {
    const c1 = 1.70158;
    const c3 = c1 + 1;
    return c3 * x * x * x - c1 * x * x;
  }
​
  static easeOutBack(x) {
    const c1 = 1.70158;
    const c3 = c1 + 1;
    return 1 + c3 * Math.pow(x - 1, 3) + c1 * Math.pow(x - 1, 2);
  }
​
  static easeInOutBack(x) {
    const c1 = 1.70158;
    const c2 = c1 * 1.525;
    return x < 0.5 ?
      (Math.pow(2 * x, 2) * ((c2 + 1) * 2 * x - c2)) / 2 :
      (Math.pow(2 * x - 2, 2) * ((c2 + 1) * (x * 2 - 2) + c2) + 2) / 2;
  }
  static easeInElastic(x) {
    const c4 = (2 * Math.PI) / 3;
    return x === 0 ?
      0 :
      x === 1 ?
      1 :
      -Math.pow(2, 10 * x - 10) * Math.sin((x * 10 - 10.75) * c4);
  }
​
  static easeOutElastic(x) {
    const c4 = (2 * Math.PI) / 3;
    return x === 0 ?
      0 :
      x === 1 ?
      1 :
      Math.pow(2, -10 * x) * Math.sin((x * 10 - 0.75) * c4) + 1;
  }
​
  static easeInOutElastic(x) {
    const c5 = (2 * Math.PI) / 4.5;
    return x === 0 ?
      0 :
      x === 1 ?
      1 :
      x < 0.5 ?
      -(Math.pow(2, 20 * x - 10) * Math.sin((20 * x - 11.125) * c5)) / 2 :
      (Math.pow(2, -20 * x + 10) * Math.sin((20 * x - 11.125) * c5)) / 2 + 1;
  }
​
  static easeInBounce(x) {
    return 1 - Easing.easeOutBounce(1 - x);
  }
​
  static easeOutBounce(x) {
    const n1 = 7.5625;
    const d1 = 2.75;
    if (x < 1 / d1) {
      return n1 * x * x;
    } else if (x < 2 / d1) {
      return n1 * (x -= 1.5 / d1) * x + 0.75;
    } else if (x < 2.5 / d1) {
      return n1 * (x -= 2.25 / d1) * x + 0.9375;
    } else {
      return n1 * (x -= 2.625 / d1) * x + 0.984375;
    }
  }
​
  static easeInOutBounce(x) {
    return x < 0.5 ?
      (1 - Easing.easeOutBounce(1 - 2 * x)) / 2 :
      (1 + Easing.easeOutBounce(2 * x - 1)) / 2;
  }
}
​
function stringToArray(str) {
  return [...str];
}