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Index › Programming Questions & Help › OpenGL and 3D Libraries › How to draw a 3D car, tranlating along the road
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How to draw a 3D car, tranlating along the road? (Read 1851 times)
phiggins
How to draw a 3D car, tranlating along the road?
Dec 15th, 2005, 5:36pm  
Hi

whats the best way to draw a basic car (box's? vertexs?) with rotating wheels to move along a road? this all has to be in 3D ?
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gll
Re: How to draw a 3D car, tranlating along the roa
Reply #1 - Dec 15th, 2005, 7:32pm  
This is a complex question. There many way to do it and it would be related to your goals.

If you need schematic representation, you could use a set of boxes and cylinders that you could move using popMatrix() and popMatrix(). http://processing.org/learning/examples/pushpop.html

If you need physic simulation like in this example: http://odejava.org/jws/jws-org.odejava.xith3d.test.CarExample.jnlp
See: http://processing.org/discourse/yabb_beta/YaBB.cgi?board=os_libraries_tools;action=display;num=1123794422
http://odejava.org/tiki-index.php

If you want to design a streamlined car, you could build something to represent complex surfaces width bezierPoint(). http://processing.org/reference/bezierPoint_.html Bézier was engineer for Renault and worked on curved lines to help draftmen working on round surfaces for cars.

If you prefer, you could import a préexisting model done in other software via the OBJLoader librairie. http://processing.org/discourse/yabb_beta/YaBB.cgi?board=os_libraries_tools;action=display;num=1114999115
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LaBelle / ANAR.ch / LaBelle.spaceKIT.ca
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phiggins
Re: How to draw a 3D car, tranlating along the roa
Reply #2 - Dec 15th, 2005, 8:09pm  
Is a set of boxes the best way ? eg to make a bonnet ? or is there a better way to draw a basic car? its only a schematic represetation... nothing special

eg.. it doesnt work doing it like this ?

void drawCar(){
//Car One

 pushMatrix();
 rotateY(-.9);
 translate(190, 400, za);
 drawBonnet();
 stroke(0);
 fill(255);
 box(40,30,40);
 popMatrix();  
 
}

void drawBonnet(){

 pushMatrix();
 rotateY(-.9);
 translate(270,350, zc);
 stroke(0);
 fill(255);
 box(30,15,20);
 popMatrix();
 
}

void drawTruck(){

 pushMatrix();
 rotateY(-.9);
 translate(305, 415, zb);
 stroke(0);
 fill(0, 126, 255);
 box(20);
 popMatrix();
 

any ideas why ?
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« Last Edit: Dec 15th, 2005, 10:48pm by phiggins »  
 
gll
Re: How to draw a 3D car, tranlating along the roa
Reply #3 - Dec 18th, 2005, 11:44pm  
Code:

import processing.opengl.*;
void setup(){
  size(400,200,OPENGL);
}

void draw(){ 
  background(255);

  //MoveAlongPath or General Transformations
  pushMatrix(); 

  translate(width/2,height/2,-100); 
  rotateX(mouseX/(float)width*2*PI);
  rotateY(mouseY/(float)height*2*PI);

  drawCar();

  popMatrix();

} 

void drawCar(){


  float d = noise((frameCount+100)/100f)*50;
  float w = noise((frameCount+200)/100f)*150;
  float h = noise((frameCount+320)/100f)*300;
  float k = noise((frameCount+520)/100f)*50;

fill(#776656); 
  pushMatrix(); 
  translate(0,0,0); 
  box(w,h,d); 
  popMatrix(); 

  pushMatrix(); 
  translate(0,-h*0.16666f,-d); 
  box(w*0.85f,h*0.3333f,d); 
  popMatrix();   


fill(#998878);
  pushMatrix(); 
  translate(w/2f,-h/2*0.75f,k); 
  rotateX(frameCount/10f);
  box(w/10f,k,k); 
  popMatrix();	 

  pushMatrix(); 
  translate(w/2f,h/2*0.75f,k); 
    rotateX(frameCount/10f);
  box(w/10f,k,k); 
  popMatrix();   
  
  pushMatrix(); 
  translate(-w/2f,-h/2*0.75f,k); 
  rotateX(frameCount/10f);
  box(w/10f,k,k); 
  popMatrix();	 

  pushMatrix(); 
  translate(-w/2f,h/2*0.75f,k); 
    rotateX(frameCount/10f);
  box(w/10f,k,k); 
  popMatrix();   

}


I'm not sure it's the kind of car I would drive.
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