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Index › Programming Questions & Help › Syntax Questions › Cube vertices.

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Cube vertices. (Read 649 times)

Woodlouse

Cube vertices.
Nov 7^th, 2009, 10:19am

I'm usign an example to make a cube that rotates, with a label following each corner. I understand usign mouseX/Y etc as co-ordinates for the text, but Im not sure what I need to do to create somethign tht will 'listen' for the current position of the corner of the cube once it starts rotating? - do I just position the label before I translate & rotate in the code below?

Thankyou!

Code:



fill(100);
noStroke();
pushMatrix();
translate(mouseX+50, mouseY, 0);   //CUBE SOLID(PANELS).
rotateY(y);
rotateX(x);
rotateZ(z);
scale(2,2,2);
beginShape(QUADS);

vertex(-10,  10,  10);
vertex( 10,  10,  10);
vertex( 10, -10,  10);
vertex(-10, -10,  10);

vertex( 10,  10,  10);
vertex( 10,  10, -10);
vertex( 10, -10, -10);
vertex( 10, -10,  10);

vertex( 10,  10, -10);
vertex(-10,  10, -10);
vertex(-10, -10, -10);
vertex( 10, -10, -10);

vertex(-10,  10, -10);
vertex(-10,  10,  10);
vertex(-10, -10,  10);
vertex(-10, -10, -10);

vertex(-10,  10, -10);
vertex( 10,  10, -10);
vertex( 10,  10,  10);
vertex(-10,  10,  10);

vertex(-10, -10, -10);
vertex( 10, -10, -10);
vertex( 10, -10,  10);
vertex(-10, -10,  10);

endShape(CLOSE);

popMatrix();

Woodlouse

Re: Cube vertices.
Reply #1 - Nov 7^th, 2009, 12:25pm

-UPDATED-

I have added a piece of text into a new push/pop matrix and it is visible and can be rotated, but it seems to be rotating around a long way from the centre.

Which property can I change to get the text to move around a smaller orbit?

Code:

PFont font;
float y = 6;
float x = 4;
float z = 0;


void setup() {
size(640, 360, P3D); 


}


void draw(){
  background(0);

  lights();
stroke(255);
noFill();
pushMatrix();
translate(mouseX-40, mouseY, 0);
rotateY(y);
rotateX(x);
rotateZ(z-5);
box(40);
popMatrix();


pushMatrix();
//translate(mouseX, mouseY);
font = loadFont("ArialMT-12.vlw");
textFont(font);
fill(255);
text("left-click to rotate (x)", width/3, height/2, 0);
text("right-click to rotate (y)", width/3, height/2+13, 0);   //CUBE WIREFRAME.
popMatrix();



if((mousePressed)&& (mouseButton == RIGHT)){
  y = y+0.1;
}else if((mousePressed)&& (mouseButton == LEFT)){
  x = x+0.1;
}



fill(100);
noStroke();
pushMatrix();
translate(width/3, height/2, 0);   //CUBE SOLID(PANELS).
rotateY(y);
rotateX(x);
rotateZ(z);
scale(2,2,2);
beginShape(QUADS);

vertex(-10,  10,  10);
vertex( 10,  10,  10);
vertex( 10, -10,  10);
vertex(-10, -10,  10);

vertex( 10,  10,  10);
vertex( 10,  10, -10);
vertex( 10, -10, -10);
vertex( 10, -10,  10);

vertex( 10,  10, -10);
vertex(-10,  10, -10);
vertex(-10, -10, -10);
vertex( 10, -10, -10);

vertex(-10,  10, -10);
vertex(-10,  10,  10);
vertex(-10, -10,  10);
vertex(-10, -10, -10);

vertex(-10,  10, -10);
vertex( 10,  10, -10);
vertex( 10,  10,  10);
vertex(-10,  10,  10);

vertex(-10, -10, -10);
vertex( 10, -10, -10);
vertex( 10, -10,  10);
vertex(-10, -10,  10);

endShape(CLOSE);

popMatrix();


pushMatrix();
fill(255);
translate(width/3, height/2, 0);
rotateY(y);
rotateX(x);
rotateZ(z);
//scale(2,2,2);
text("hello?",width/3, height/2, 0);
popMatrix();



}

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