Fading Like a Flower.

Strange shapes made with sine curve.


A translunary flower with sine curve.

It's an animation work that was made with Processing.

When I was playing around the sine curve, I found a funny shape.
That shape seems to appear when I drew lines previous (x, y) to current (y, x). The x and y are both calculated with the sin() function.

I adjusted line count, with, alpha value, etc, and made this eternally looping animation.

This creative coding code does not display any images on the screen but generates image files for animation.
You can make an animation with these files.

Processing example code.

Please feel free to use this example code, if you like it.
To see other works based on my code is my pleasure. And my honor.


// Fading Like a Flower.
// @author @deconbatch
// @version 0.1
// Processing 3.2.1
// 2019.01.05

void setup() {

  size(720, 720);
  colorMode(HSB, 360, 100, 100, 100);
  rectMode(CENTER);
  smooth();
  noStroke();
  noFill();
  noLoop();

}

void draw() {

  int   frameCntMax = 24 * 6;
  int   waveCntMax  = 500;
  float baseWidth   = width * 0.22 / waveCntMax;
  float baseHeight  = width * 0.22;
  float baseHue     = random(360);
  float baseDiv     = random(0.4, 0.8);
  float waveDiv     = random(0.00, 0.05); // must be smaller than baseDiv
  float prevX       = 0.0;
  float prevY       = 0.0;
  
  translate(width / 2, height / 2);

  for (int frameCnt = 0; frameCnt < frameCntMax; ++frameCnt) {

    pushMatrix();
    rotate(PI * 0.25); // just an adjustment for fancy angle
    background(baseHue, 100.0, 20.0, 100.0);
    
    for (int waveCnt = 0; waveCnt < waveCntMax; ++waveCnt) {

      // shift start frame of easing with each line
      float frameRatio  = map(frameCnt, 0, frameCntMax, 0.0, 1.0);
      float easingRatio = easeInOutCosine((frameRatio + waveCnt * 1.0 / waveCntMax) % 1.0);
      
      float waveRadian    = waveCnt * TWO_PI / waveCntMax;
      float waveAmplitude = constrain(sin(waveCnt * PI / (waveCntMax - 1)), 0.0, 1.0);
      float cRadianDiv    = PI * (baseDiv - waveAmplitude * waveDiv);

      for (float cRadian = 0.0; cRadian < TWO_PI; cRadian += cRadianDiv) {
        
        float cPers = constrain((1.0 + sin(cRadian + TWO_PI * easingRatio + waveRadian)) * 0.5, 0.0, 1.0);
        float cSiz  = cPers * (waveAmplitude + 1.0) * 30.0;
        float cHue  = baseHue + sin(TWO_PI * (easingRatio + waveCnt * 1.0 / waveCntMax)) * 30.0 + 360.0;
        float cSat  = map(cPers, 0.0, 1.0, 100.0, 30.0);
        float cBri  = map(cPers, 0.0, 1.0, 60.0, 100.0);
        float cAlp  = map(cPers, 0.0, 1.0, 0.0, 40.0);
        
        float cX = sin(cRadian) * baseWidth + (waveCnt - (waveCntMax - 1) / 2.0) * baseWidth * 4.0;
        float cY = sin(cRadian + TWO_PI * frameRatio + waveRadian) * baseHeight;

        // to avoid straight line        
        if (cRadian == 0.0) {
          prevX = cY;
          prevY = cX;
        }

        strokeWeight(cSiz);
        stroke(cHue % 360.0, cSat, cBri, cAlp);
        line(prevY, prevX, cX, cY);

        prevX = cX;
        prevY = cY;
      
      }

    }

    popMatrix();

    casing(baseHue);
    saveFrame("frames/" + String.format("%04d", frameCnt) + ".png");

  }

  exit();

}

/**
 * easeInOutCubic easing function.
 * @param  t     0.0 - 1.0 : linear value.
 * @return float 0.0 - 1.0 : eased value.
 */
private float easeInOutCosine(float t) {

  return 0.5 - cos(PI * t) * 0.5;

}

/**
 * casing : draw fancy casing
 * @param  hueBase : casing color.
 */
private void casing(float baseHue) {

  fill(0.0, 0.0, 0.0, 0.0);
  strokeWeight(40.0);
  stroke(baseHue, 100.0, 10.0, 100.0);
  rect(0.0, 0.0, width, height);
  strokeWeight(30.0);
  stroke(0.0, 0.0, 90.0, 100.0);
  rect(0.0, 0.0, width, height);
  noStroke();

}

/*
Copyright (C) 2019- deconbatch

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see 
*/



Yet another example image.

 One scene from the eternally looping animation made with code.



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