Example Parameterized Generation of XYZ Points for 3D Objects

gistfile1.js

// Zachary Johnson
// http://www.zachstronaut.com

var x, y, z, i = 250;
while (i--) {
    /* random distribution /*
    x = -125 + Math.round(Math.random() * 125 * 2);
    y = -125 + Math.round(Math.random() * 125 * 2);
    z = -Math.round(Math.random() * 250);
    */

    /* galaxy /*
    x = 17500 * Math.cos(i * 0.8) / (i + 100) - 5 + Math.random() * 10;
    z = -150 + 17500 * Math.sin(i * 0.8) / (i + 100) - 5 + Math.random() * 10;
    y = -25 + Math.round(Math.random() * 25 * 2);
    */

    /* funnel or black hole /*
    x = 7500 * Math.cos(i) / (i);
    z = 7500 * Math.sin(i) / (i);
    y = i;

    //also

    x = 17500 * Math.cos(i * 0.8) / (i + 100) - 5 + Math.random() * 10;
    z = -150 + 17500 * Math.sin(i * 0.8) / (i + 100) - 5 + Math.random() * 10;
    y = i * 0.3 + -25 + Math.round(Math.random() * 25 * 2);
    */

    /* corkscrew, spiral /*
    y = i; // or can be random
    x = Math.cos(0.1 * y) * 50;
    z = Math.sin(0.1 * y) * 50;
    */

    /* somewhat galaxy-ish? /*
    y = i; // or can be random
    x = Math.tan(0.1 * y) * 50;
    z = Math.sin(0.1 * y) * 50;
    */

    /* ring, cylinder /*
    y = i;
    x = Math.cos(y) * 150;
    z = Math.sin(y) * 150;
    */

    /* cool loop /*
    x = 150 * Math.cos(i) * Math.sin(i);
    y = 150 * Math.sin(i) * Math.sin(i);
    z = 150 * Math.cos(i);
    */

    /* bowtie, hourglass /*
    z = 150 * Math.sin(i);
    x = 150 * Math.cos(z) * Math.sin(i);
    y = 150 * Math.sin(z) * Math.sin(i);
    */

    /* cluster /*
    z = i * Math.cos(i);
    x = i * Math.cos(z) * Math.sin(i);
    y = i * Math.sin(z) * Math.sin(i);
    */

    /* sphere /**/
    // z = 150 * Math.cos(i);
    // x = 150 * Math.cos(z) * Math.sin(i);
    // y = 150 * Math.sin(z) * Math.sin(i);
    // also:
    z = 0.3 * 150 * Math.cos(i);
    x = 0.3 * 150 * Math.cos(Math.PI * 2 * i / (0.3 * 250)) * Math.sin(i);
    y = 0.3 * 150 * Math.sin(Math.PI * 2 * i / (0.3 * 250)) * Math.sin(i);
    // also:
    // z = 150 * Math.cos(Math.PI * i / 250);
    // x = 150 * Math.cos(i) * Math.sin(Math.PI * i / 250);
    // y = 150 * Math.sin(i) * Math.sin(Math.PI * i / 250);
    /**/

    // Do what you want with x, y, z here
}