I've been learning processing bit by bit the last couple of weeks, and I've finally ran into a problem I can't seem to solve. The code is supposed to draw the cube by lines, and when it's done, just replace it with a box to save time and use fills. The drawing part works, but when it is replaced with a box, it places it on a different place then the original box. How come? The problem doesn't seem to be with the replaced boxes, since those are 'translated' as they should..



code:

import processing.opengl.*;

float eyeZ = 80;
float eyeY;
float eyeX;

int cubesize;
float increase;
int cubetotal;
int boxdone;

float zdepth1 = 10;
float xwidth1 = 10;
float ywidth1 = 10;

float zdepth2 = 10;
float xwidth2 = 10;
float ywidth2 = 10;

float zdepth3 = 10;
float xwidth3 = 10;
float ywidth3 = 10;

float zdepth4 = 10;
float xwidth4 = 10;
float ywidth4 = 10;

void setup(){
size(640, 480, OPENGL);
smooth();
noFill();
background(255);
}

void draw(){
 
  background(255);
  camera(eyeX, eyeY, eyeZ,
        0.0, 0.0, 0.0,
        0.0, 1.0, 0.0);

// box(10);
eyeY = eyeY-0.1;
eyeX = eyeX-0.1;

drawCube();
translate(10, 0, 0);
drawCube();

increase = increase+0.001;


}

void drawCube(){
strokeWeight(2);
if(boxdone == 0){
if(xwidth1 > 0){
xwidth1=xwidth1-increase;
}else if(xwidth2 > 0){
 xwidth2=xwidth2-increase;
 zdepth4=zdepth4-increase;
}



if(ywidth1 > 0){
ywidth1=ywidth1-increase;
}else if(ywidth2 > 0){
 ywidth2=ywidth2-increase;
 zdepth3=zdepth3-increase;
}else if(zdepth2 > 0){
zdepth2=zdepth2-increase;

}

if(zdepth1 > 0){
zdepth1=zdepth1-increase;
}else if(xwidth3 > 0){
 ywidth3=ywidth3-increase;
 xwidth3=xwidth3-increase;  
}else if(xwidth4 > 0){
 ywidth4=ywidth4-increase;
 xwidth4=xwidth4-increase;  
}else{
 boxdone=1;
}




 //drawphase
line(xwidth4,0,10,0);  
line(0,ywidth4,0,10);
line(10,10,xwidth3,10);
line(10,ywidth3,10,10);

translate(0,0,10);
line(xwidth2,0,10,0);
line(0,ywidth2,0,10);
line(10,10,xwidth1,10);
line(10,ywidth1,10,10);
translate(0,0,-10);
 
 
rotateZ(radians(45));
line(0,0,zdepth2,0,0,10);
rotateZ(radians(45));
line(10,-10,zdepth1,10,-10,10);
rotateZ(radians(180));
translate(-10,0,0);
rotateZ(radians(45));
line(0,0,zdepth3,0,0,10);
rotateZ(radians(45));
line(10,-10,zdepth4,10,-10,10);
//rotateZ(radians(-360));

}else if(boxdone == 1){
 translate(5,5,5);
 strokeWeight(1.71);

box(10);
boxdone=2;
cubetotal++;
 zdepth1 = 10;
xwidth1 = 10;
ywidth1 = 10;

zdepth2 = 10;
xwidth2 = 10;
ywidth2 = 10;

zdepth3 = 10;
xwidth3 = 10;
ywidth3 = 10;

zdepth4 = 10;
xwidth4 = 10;
ywidth4 = 10;
translate(-5,-5,-5);

}else if(boxdone == 2){
  //stroke(255,0,0);
 translate(5,5,5);

 strokeWeight(1.71);
  box(10);
 translate(-5,-5,-5);
   
}
}

antiplastik wrote on Feb 29^th, 2008, 6:28pm:

Thanks! It does work, though I still do not understand matrix stacking.. Could you link me to some more info?