Cartesian coordinates to 3D

Programming Questions

matchej

in Programming Questions • 5 months ago

Hello,

I am trying to make a program, which will plot many points of cartesian coordinates in 3D - make a map and rotate it zoom etc. Math work is finished, I have coordinates output but now don't know what to do. I have very poor results (never worked with open GL before.), tried some libraries (peasycam, opengl), but cannot move on. Cartesians are starting from xyz 0,0,0.

May I ask your for some help or hint (code + comments)? Thanks a lot.

With best regards Jakub.

Replies(1)

asimes

Re: Cartesian coordinates to 3D

5 months ago

Processing has a 3D mode that can be set up like this:

PVector[] examples = new PVector[3];
float theta = 0;
void setup() {
size(400, 400, P3D);
examples[0] = new PVector(0, 0, 50);
examples[1] = new PVector(50, 0, 0);
examples[2] = new PVector(0, 50, 0);
}
void draw() {
background(255);
// Translate so that (0, 0, 0) is at the center of the screen
translate(width/2, height/2);
// Rotate around (0, 0, 0)
rotateY(theta);
// Use simple geometry to show points
for (int i = 0; i < examples.length; i++) {
pushMatrix();
translate(examples[i].x, examples[i].y, examples[i].z);
box(10);
popMatrix();
}
theta += TWO_PI/200;
}

Generally you will want to use some kind of geometry to represent points (cubes, spheres, etc.).

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