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Index › Programming Questions & Help › OpenGL and 3D Libraries › 3D Oval?

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3D Oval?? (Read 1232 times)

maxbreakwell

3D Oval??
Jun 3^rd, 2009, 11:23pm

How do I create a 3D Oval, not a perfect sphere? Sorry if this is a beginner question, but I'm kinda new at using Processing. I am trying to do a 3d sketch of some sort of flying insect, maybe a bee, and the body looks pretty lame as just a sphere. Here is what I have got so far

Quote:

import processing.opengl.*;

float r = 25;
float theta = 0;

void setup() {
size(300,300,OPENGL);
}

void draw() {
background(255);

float z = r * sin(theta);

noStroke();
translate(width/2,height/2);
rotateX(PI*mouseY/height);
rotateY(PI*mouseX/width);
lights();

sphere(20);

stroke(255, 102, 0);
//line(-50, 50, 0, -10, 10, 0);
//line(-50, -50, 0, -10, -10, 0);
//line(50, 50, 0, 10, 10, 0);
//line(50, -50, 0, 10, -10, 0);

stroke(0,0,0);
bezier(-10, 10, 0, -50, 50, z, -50, -50, z, -10, -10, 0);
bezier(10, 10, 0, 50, 50, z, 50, -50, z, 10, -10, 0);

theta += 0.05;

}

gll

Re: 3D Oval??
Reply #1 - Jun 4^th, 2009, 8:24am

You could scale a sphere in one direction (Y is better with the default sphere algorithm in P5). You get a superEllipsoid:

Code:

import processing.opengl.*;

void setup(){
  size(800,400,OPENGL);
}

void draw(){
  background(255);

  //Only for display
  translate(width/2,height/2);
  rotateZ(mouseX/100f);
  rotateX(mouseY/100f);

  //Your Object
  pushMatrix();
  scale(1,2,1);
  sphere(100);
  popMatrix();
}

LaBelle / ANAR.ch / LaBelle.spaceKIT.ca

maxbreakwell YaBB Newbies Offline Posts: 2	Re: 3D Oval?? Reply #2 - Jun 4^th, 2009, 9:07am Hey thanks! That was exactly what I was looking for.

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