Is there any command or function that make a geometry rotate?

Programming Questions

manuel.v...

Is there any command or function that make a geometry rotate?

in Programming Questions • 4 months ago

I was trying to rotate some lines, but I don't know if its possible calling a function.

Can I?

What I want to do is rotate each line in a different angle.

int x= 50;

int y = 50;

int spacing = 2;

int len = 20;

int endLegs = 150;

size(200,200);

background(100);

while(x <= endLegs){

line(x,y,x,y+len);

x = x + spacing;

}

Thanks.

Replies(4)

Omnimusha

Re: Is there any command or function that make a geometry rotate?

4 months ago

by Omni

int x= 50;
int y = 50;
int spacing = 2;
int len = 20;

int endLegs = 1450;
void setup(){
size(600,600);
}

void draw(){
background(100);

while(x <= endLegs){
      pushMatrix();
   rotate(x/2);
   translate(430, 320);
    line(x,y,x,y+len);
    x = x + spacing;
   popMatrix();
}
x=50;
}

manuel.v...

Re: Is there any command or function that make a geometry rotate?

4 months ago

I was trying to rotate each line from the center of each line.

v.k.

Re: Is there any command or function that make a geometry rotate?

4 months ago

Rotate() rotates things using coordinate 0,0 as axis. So you need to draw your line with the center at 0, 0, then rotate, see this http://processing.org/learning/transform2d/

void setup(){
size(200,200);
smooth();
}
void draw(){
background(255);
// not affected by rotate or translated
line(0, height/2, width, height/2);
line(width/2, 0, width/2, height);
float lineSize = 100;
float beginX = -lineSize/2;
//move coordinates to center of screen
translate(width/2, height/2);
// rotate
pushMatrix();
rotate(radians(frameCount));
line (beginX, 0, beginX + lineSize, 0);
popMatrix();
// constrain movment usin push/pop Matrix...
pushMatrix();
rotate(radians(360-frameCount));
line (beginX, 0, beginX + lineSize, 0);
popMatrix();
}

asimes

Re: Is there any command or function that make a geometry rotate?

4 months ago

Should probably read this: http://processing.org/learning/transform2d/

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