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Topic: Rotating 3D plotted points (Read 473 times) |
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ssdesign
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Rotating 3D plotted points
« on: Dec 31st, 2004, 9:16pm » |
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Hi, let me introduce myself as a new comer to processing.
I have written a small program which plots a "Tranguloid Trefoil" 3D surface. I am just plotting it as POINTS.
The question is, I now want to move the object and see it in 3D when mousePressed() or mouseMoved() even happens.
Any suggestions??
Thanks.
here is my code:
///////////////////////////////////////////
///////////////////////////////////////////
void setup(){
size(500, 500);
background(255);
}
void loop(){
float u = random(-PI, PI);
float v = random(-PI, PI);
float sc = 30;
float x = sc*(2*sin(3*u) / (2 + cos(v)));
float y = sc*(2*(sin(u) + 2*sin(2*u)) / (2 + cos(v + 2*PI / 3)));
float z = sc*((cos(u) - 2*cos(2*u))*(2 + cos(v))*(2 + cos(v + 2*PI / 3)) / 4);
point(x+width/2, y+height/2, z);
stroke(102);
}
void mouseMoved(){
rotateY(mouseX);
rotateX(mouseY);
}
///////////////////////////////////////////
///////////////////////////////////////////
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:: form follows function ::
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fjen
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Re: Rotating 3D plotted points
« Reply #1 on: Jan 1st, 2005, 3:49pm » |
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try this ..
Code:
void setup(){
size(500, 500);
background(255);
Points3d = new Vector();
framerate(20);
}
float r_step = 0.002;
float ry=0.0f;
void loop(){
background(120);
stroke(0);
translate(width/2.0, height/2.0, -200.0);
rotateY(ry);
ry += r_step;
float u = random(-PI, PI);
float v = random(-PI, PI);
float sc = 30;
float x = sc*(2*sin(3*u) / (2 + cos(v)));
float y = sc*(2*(sin(u) + 2*sin(2*u)) / (2 + cos(v + 2*PI / 3)));
float z = sc*((cos(u) - 2*cos(2*u))*(2 + cos(v))*(2 + cos(v + 2*PI / 3)) / 4);
if (Points3d.size() < 1000) Points3d.add(new Point3D(x, y, z));
for (int i=0; i < Points3d.size(); i++) ((Point3D)Points3d.get(i)).draw();
}
Vector Points3d;
class Point3D
{
float x, y, z;
Point3D (float _x, float _y, float _z)
{
this.x = _x; this.y = _y; this.z = _z;
}
void draw()
{
point(this.x, this.y, this.z);
}
} |
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as you said, you were "plotting it as points", means you were just drawing pixels in 3d-space. there is no way to rotate something like point() because it's not an object, just a pixel-drawing -method. that's why i created the Point3D-class above to hold and draw the values over and over.
see this example for how to rotate things via mouse: RGB Cube
/F
btw: [ code ] .... [ /code ] without the spaces will give you a code-field in the post. [ link=http... ] ... [ /link ] will give you a textlink ...
happy 2005!
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ssdesign
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Re: Rotating 3D plotted points
« Reply #2 on: Jan 2nd, 2005, 7:50pm » |
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thanks fjen,
that was really helpful. I shall post the link here once I have something to show to everyone 
sajid
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:: form follows function ::
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