Cones, Cylinders and Pyramids

Cone, cylinder, pyramid

To create the the sides of cones, cylinder and pyramids you can use this code:

import controlP5.*;
import processing.opengl.*;

ControlP5 controlP5;
float topRadius=10;
float bottomRadius=10;
int tall=100;
int sides=4;

float rotationX=-PI/2;
float rotationY=-PI;

void setup() {
  size(400, 400, OPENGL);

  controlP5 = new ControlP5(this);
  controlP5.addSlider("top", topRadius, 100, 10, 10, 20, 100, 14).setId(1);
  controlP5.addSlider("bottom", bottomRadius, 100, 10, 10, 50, 100, 14).setId(2);
  controlP5.addSlider("height", 10, 140, 100, 10, 80, 100, 14).setId(3);
  Slider s=controlP5.addSlider("sides", 4, 100, 4, 10, 110, 100, 14);
  Slider x=controlP5.addSlider("rotationx", rotationX, PI/2, 0, 10, 140, 100, 14);
  Slider y=controlP5.addSlider("rotationy", rotationY, PI, 0, 10, 170, 100, 14);
  s.setId(4);
  s.setMin(3);
  s.setMax(30);
  y.setId(6);
  y.setMin(-PI);
  y.setMax(2*PI);
  x.setId(5);
  x.setMin(-PI);
  x.setMax(2*PI);
}


void draw() {
  background(0);
  controlP5.draw();
  lights();
  directionalLight(255, 0, 0, -1, 1, 0);
  directionalLight(0, 0, 255, 1, 1, 1);
  directionalLight(255, 255, 0, 0, -1, 1);

  pushMatrix();
  translate((int)width / 2, (int)height / 2);
  rotateX(rotationX);
  rotateY(rotationY);
  noStroke();
  fill(255);
  drawCylinder(topRadius, bottomRadius, tall, sides);
  popMatrix();
}

void drawCylinder(float topRadius, float bottomRadius, float tall, int sides) {
  float angle = 0;
  float angleIncrement = TWO_PI / sides;
  beginShape(QUAD_STRIP);
  for (int i = 0; i < sides + 1; ++i) {
    vertex(topRadius*cos(angle), 0, topRadius*sin(angle));
    vertex(bottomRadius*cos(angle), tall, bottomRadius*sin(angle));
    angle += angleIncrement;
  }
  endShape();
}

public void controlEvent(ControlEvent theEvent) {
  switch(theEvent.controller().id()) {
    case(1): // top
    topRadius = (int)(theEvent.controller().value());

    break;
    case(2):  // bottom
    bottomRadius = (int)(theEvent.controller().value());

    break;  
    case(3):  // height
    tall = (int)(theEvent.controller().value());

    break; 
    case(4):  // sides
    sides = (int)(theEvent.controller().value());

    break;
    case(5):  // rot x
    rotationX = (int)(theEvent.controller().value());

    break;
    case(6):  // rot y
    rotationY = (int)(theEvent.controller().value());

    break;
  }
}

To add the top to the shape:

import controlP5.*;
import processing.opengl.*;

ControlP5 controlP5;
float topRadius=10;
float bottomRadius=10;
int tall=100;
int sides=4;

float rotationX=0;
float rotationY=0;

void setup() {
  size(400, 400, OPENGL);

  
  controlP5 = new ControlP5(this);
  controlP5.addSlider("top", topRadius, 100, 10, 10, 20, 100, 14).setId(1);
  controlP5.addSlider("bottom", bottomRadius, 100, 10, 10, 50, 100, 14).setId(2);
  controlP5.addSlider("height", 10, 140, 100, 10, 80, 100, 14).setId(3);
  Slider s=controlP5.addSlider("sides", 4, 100, 4, 10, 110, 100, 14);
  Slider x=controlP5.addSlider("rotationx", rotationX, PI/2, 0, 10, 140, 100, 14);
  Slider y=controlP5.addSlider("rotationy", rotationY, PI, 0, 10, 170, 100, 14);
  s.setId(4);
  s.setMin(3);
  s.setMax(30);
  y.setId(6);
  y.setMin(-PI);
  y.setMax(2*PI);
  x.setId(5);
  x.setMin(-PI);
  x.setMax(2*PI);
}


void draw() {
  background(0);
  controlP5.draw();
  lights();
  directionalLight(255, 0, 0, -1,1, 0);
  directionalLight(0, 0, 255, 1,1, 1);
  directionalLight(255, 255, 0,0,-1, 1);

  pushMatrix();
  translate((int)width / 2, (int)height / 2);
  rotateX(rotationX);
  rotateY(rotationY);
  noStroke();
  fill(255);
  drawCylinder(topRadius, bottomRadius, tall, sides);
  popMatrix();
   
}

void drawCylinder(float topRadius, float bottomRadius, float tall, int sides) {
  float angle = 0;
  float angleIncrement = TWO_PI / sides;
  beginShape(QUAD_STRIP);
  for (int i = 0; i < sides + 1; ++i) {
    vertex(topRadius*cos(angle), 0, topRadius*sin(angle));
    vertex(bottomRadius*cos(angle), tall, bottomRadius*sin(angle));
    angle += angleIncrement;
  }
  endShape();

  // If it is not a cone, draw the circular top cap
  if (topRadius != 0) {
    angle = 0;
    fill(255,255,255,200);
    stroke(0);
    beginShape(TRIANGLE_FAN);

    // Center point
    vertex(0, 0, 0);
    for (int i = 0; i <sides + 1; i++) {
      vertex(topRadius * cos(angle), 0, topRadius * sin(angle));
      angle += angleIncrement;
    }
    endShape();
  }

}


public void controlEvent(ControlEvent theEvent) {
  switch(theEvent.controller().id()) {
    case(1): // top
    topRadius = (int)(theEvent.controller().value());

    break;
    case(2):  // bottom
    bottomRadius = (int)(theEvent.controller().value());

    break;  
    case(3):  // height
    tall = (int)(theEvent.controller().value());

    break; 
    case(4):  // sides
    sides = (int)(theEvent.controller().value());

    break;
    case(5):  // rotation x
    rotationX = (int)(theEvent.controller().value());

    break;
    case(6):  // rotation y
    rotationY = (int)(theEvent.controller().value());

    break;
  }
}

To add the bottom:

import controlP5.*;
import processing.opengl.*;

ControlP5 controlP5;
float topRadius=10;
float bottomRadius=10;
int tall=100;
int sides=4;

float rotationX=-PI/2;
float rotationY=-PI;

void setup() {
  size(400, 400, OPENGL);

  controlP5 = new ControlP5(this);
  controlP5.addSlider("top", topRadius, 100, 10, 10, 20, 100, 14).setId(1);
  controlP5.addSlider("bottom", bottomRadius, 100, 10, 10, 50, 100, 14).setId(2);
  controlP5.addSlider("height", 10, 140, 100, 10, 80, 100, 14).setId(3);
  Slider s=controlP5.addSlider("sides", 4, 100, 4, 10, 110, 100, 14);
  Slider x=controlP5.addSlider("rotationx", rotationX, PI/2, 0, 10, 140, 100, 14);
  Slider y=controlP5.addSlider("rotationy", rotationY, PI, 0, 10, 170, 100, 14);
  s.setId(4);
  s.setMin(3);
  s.setMax(30);
  y.setId(6);
  y.setMin(-PI);
  y.setMax(2*PI);
  x.setId(5);
  x.setMin(-PI);
  x.setMax(2*PI);
}


void draw() {
  background(0);
  controlP5.draw();
  lights();
  directionalLight(255, 0, 0, -1,1, 0);
  directionalLight(0, 0, 255, 1,1, 1);
  directionalLight(255, 255, 0,0,-1, 1);

  pushMatrix();
  translate((int)width / 2, (int)height / 2);
  rotateX(rotationX);
  rotateY(rotationY);
  noStroke();
  fill(255);
  drawCylinder(topRadius, bottomRadius, tall, sides);
  popMatrix();
   
}

void drawCylinder(float topRadius, float bottomRadius, float tall, int sides) {
  float angle = 0;
  float angleIncrement = TWO_PI / sides;
  beginShape(QUAD_STRIP);
  for (int i = 0; i < sides + 1; ++i) {
    vertex(topRadius*cos(angle), 0, topRadius*sin(angle));
    vertex(bottomRadius*cos(angle), tall, bottomRadius*sin(angle));
    angle += angleIncrement;
  }
  endShape();

  // If it is not a cone, draw the circular top cap
  if (topRadius != 0) {
    angle = 0;
    beginShape(TRIANGLE_FAN);

    // Center point
    vertex(0, 0, 0);
    for (int i = 0; i <sides + 1; i++) {
      vertex(topRadius * cos(angle), 0, topRadius * sin(angle));
      angle += angleIncrement;
    }
    endShape();
  }

  // If it is not a cone, draw the circular bottom cap
  if (bottomRadius != 0) {
    angle = 0;
    beginShape(TRIANGLE_FAN);
    fill(255,255,255,200);
    stroke(0);
    // Center point
    vertex(0, tall, 0);
    for (int i = 0; i < sides + 1; i++) {
      vertex(bottomRadius * cos(angle), tall, bottomRadius * sin(angle));
      angle += angleIncrement;
    }
    endShape();
  }
}


public void controlEvent(ControlEvent theEvent) {
  switch(theEvent.controller().id()) {
    case(1): // top
    topRadius = (int)(theEvent.controller().value());

    break;
    case(2):  // bottom
    bottomRadius = (int)(theEvent.controller().value());

    break;  
    case(3):  // height
    tall = (int)(theEvent.controller().value());

    break; 
    case(4):  // sides
    sides = (int)(theEvent.controller().value());

    break;
    case(5):  // rot x
    rotationX = (int)(theEvent.controller().value());

    break;
    case(6):  // rot y
    rotationY = (int)(theEvent.controller().value());

    break;
  }
}