3d Programming books

web_gruber

I'm looking for books on 3d programming, any suggestions ? I found the one by Ira Greenberg to be easier to understand with less math/equations. Something similar for 3D stuff would be nice; wanted to start with a pipe that goes randomly over the screen.

Chrisir

I did the pipe thing...

essentially 3D is the same as 2D, just think of an Aquarium instead of a screen...

x is going to the right

y is the height above the ground

z is the depth

PVector is your friend and pushMatrix and popMatrix are his buddies

Some commands come with 3D: sphere, cube of course but also PShape and line() (with 6 parameters instead of 4) and text() (4 params instead of 3)

There is nice tutorial on P3D

Did you look at the books section, eg nature of code is free online

web_gruber

could you post the code if that is handy ? I have been looking at toroid example in book by ira greenberg; but think he's skipped some explanation.

Chrisir

http://openprocessing.org/collection/1190

Chrisir

http://openprocessing.org/sketch/7075

Chrisir

The first link shows a collection with a section for beginners

The 2nd is the pipe sketch

web_gruber

thanks will take a look at that. I'm math noob, a detailed explanation of drawing or rotating around axes(with example) would be useful.

Chrisir

Just read the tutorials on P3D and trigonometry and read the Sketches and play with them

Rotation is measured in radians not degrees

in 3D you can rotate around x axiy, around y and around z axis

Chrisir

this shows you different rotations

2 boxes (gray and red) rotate around their center, one (blue) rotates around another box (red)

you can see that the translations and rotations are isolated from each other. This is achieved by pushMatrix and popMatrix around one block.

More you'll learn from the tutorial on P3D

https://www.processing.org/tutorials/

Best, Chrisir ;-)

float a;       // Angle of rotation 1
float a2;      // Angle of rotation 2

void setup() 
{ 
  size(940, 760, OPENGL);
} 

void draw() 
{     
  background(0, 0, 26);
  lights(); 

  // big gray box in the center 
  pushMatrix();
  translate(width/2, height/2);
  fill(188);
  rotateY(a);
  box(200);
  popMatrix();

  // red box
  pushMatrix();
  translate(width/2, height/2);
  translate(200, 230);
  fill(255, 2, 2);
  rotateY(a2);
  box(20);
  popMatrix();

  // blue box 
  pushMatrix();
  translate(width/2, height/2);
  translate(200, 230);
  fill(2, 2, 255);
  rotateY(a2);
  translate(123, 0); 
  box(20);
  popMatrix();

  // increase angles 
  a += 0.01;
  a2 += 0.053;
} 

prince_polka

I reccomend this
https://thebookofshaders.com/