Creative coding examples.

Creative coding animation of the geometrical shapes.

It's a creative coding animation work made with the 'Processing'.

When I tried to draw a flower with the formula 'abs(sin(3 * theta))' like this.

Flower with sin().

I thought it might look good if I draw lines between each dot and I reduce the dot number. And then, I changed the value of the 'sin(value)' in sequence, I found I could make an animation with this.







The 'Processing' code example.

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

Please feel free to use this example code of Processing.
To see other works based on my code is my pleasure. And my honor.

/**
 * Snap and Roll.
 * Node garden without nodes.
 * 
 * @author @deconbatch
 * @version 0.1
 * Processing 3.2.1
 * 2019.03.12
 */

/* ---------------------------------------------------------------------- */

void setup() {

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

}

void draw() {

  int   frameCntMax = 24 * 6;
  int   nodeCntMax  = floor(random(9.0, 13)) * 2;
  int   cornerCnt   = floor(random(2.0, 9.0));
  float limitMin    = 50.0;
  float limitMax    = 200.0;
  float baseHue     = random(360.0);

  StepEasing se = new StepEasing(3);
  EasingCalc ec = new InOutCubic();
  Node [] nodes = new Node[nodeCntMax];
  for (int i = 0; i < nodeCntMax; ++i) {
    nodes[i] = new Node(baseHue + (i % 3) * 30.0);
  }

  translate(width * 0.5, height * 0.5);
  
  for (int frameCnt = 0; frameCnt < frameCntMax; ++frameCnt) {

    background(0, 0, 90, 100);
    float easeRatio = se.calculate(ec, map(frameCnt, 0, frameCntMax, 0.0, 1.0));

    // set nodes
    for (int nodeCnt = 0; nodeCnt < nodeCntMax; ++nodeCnt) {
      float radian = TWO_PI * map(nodeCnt, 0, nodeCntMax, 0.0, 1.0);
      float radius = abs(sin(radian * cornerCnt + PI * easeRatio)) * width * 0.4;
      float eX = radius * cos(radian);
      float eY = radius * sin(radian);
      nodes[nodeCnt].setNode(eX, eY);
    }

    // draw lines in a sequence
    for (int i = 0; i < nodeCntMax - 1; i++) {
      for (int j = i + 1; j < nodeCntMax; j++) {
        nodes[i].drawLine(nodes[j], limitMin, limitMax);
      }
    }

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

  }
  exit();
}


/**
 * casing : draw fancy casing
 */
private void casing() {
  blendMode(BLEND);
  fill(0.0, 0.0, 0.0, 0.0);
  strokeWeight(45.0);
  stroke(0.0, 0.0, 0.0, 100.0);
  rect(0.0, 0.0, width, height);
  strokeWeight(40.0);
  stroke(0.0, 0.0, 100.0, 100.0);
  rect(0.0, 0.0, width, height);
  noStroke();
  noFill();
}

/**
 * Keeping node information. Drawint polka dot and line between nodes.
 * @param  baseHue 0.0 - 360.0 : draw points color.
 */
private class Node {

  private float nX, nY;
  private float nHue;

  Node(float baseHue) {
    nX    = 0.0;
    nY    = 0.0;
    nHue  = baseHue % 360.0;
  }

  public void setNode(float pX, float pY) {
    nX = pX;
    nY = pY;
  }

  public float getNodeX() {
    return nX;
  }

  public float getNodeY() {
    return nY;
  }

  public void drawLine(Node toNode, float limitMin, float limitMax) {
  
    float distance = dist(nX, nY, toNode.getNodeX(), toNode.getNodeY());

    if (distance < limitMax && distance > limitMin) {
      strokeWeight(sin(PI * map(distance, limitMin, limitMax, 0.0, 1.0)) * 2.0);
      stroke(nHue, 40.0, 60.0, 100.0);
      line(nX, nY, toNode.getNodeX(), toNode.getNodeY());
    }
  
  }
}

/**
 * StepEasing : calculate easing value with step landing. It just has one easing function yet.
 * @param  _landingCount : 1 - any int value : landing number.
 */
private class StepEasing {

  private float landingPoint;
  private float easePrev;
  private float easeRatio;
  
  StepEasing(int _landingCount) {
    landingPoint = 1.0 / (_landingCount + 1);
    reset();
  }

  StepEasing() {
    landingPoint = 1.0;
    reset();
  }

  private void reset() {
    easePrev  = 0.0;
    easeRatio = 0.0;
  }
  
  /**
   * calculate : calculate easing value with step landing.
   * @param  _t    0.0 - 1.0 : linear value.
   * @return float 0.0 - 1.0 : eased value with step landing.
   */
  public float calculate(EasingCalc _calc, float _t) {
    float easeCurr = _calc.calculate(map(_t % landingPoint, 0.0, landingPoint, 0.0, 1.0));
    easeRatio += constrain((easeCurr - easePrev) * landingPoint, 0.0, 1.0);
    easePrev = easeCurr;

    return easeRatio;
  }

}

/**
 * easeInOutCubic easing function.
 * @param  _t    : 0.0 - 1.0 : linear value.
 * @return float : 0.0 - 1.0 : eased value.
 */
interface EasingCalc {
  float calculate(float _t);
}

private class InOutCubic implements EasingCalc {
  public float calculate(float _t) {
    _t *= 2.0;
    if (_t < 1.0) {
      return pow(_t, 3) / 2.0;
    }
    _t -= 2.0;
    return (pow(_t, 3) + 2.0) / 2.0;
  }
}

/*
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 <http://www.gnu.org/licenses/>
*/



Yet another example images.

Creative coding examples.