Rotate Canvas

General Discussion Other

stephan.d..

in General Discussion • Other • 2 months ago

I try to develope a small library to control old HP Pen Plotters.
My problem is that the Plotters have a diffrent coordinate system.
Now i want to apply a rotation to all my values.

x1 = upper left in Processing, but on the Plotter it is upper right.

how can i solve the problem?

Replies(1)

tfguy44

Re: Rotate Canvas

2 months ago

void setup(){
size(220,220);
}
void draw(){
background(0);
translate(width,0);
scale(-1,1);
stroke(255,0,0);
line(10,10,30,10);
line(30,10,25,5);
line(30,10,25,15);
stroke(0,0,255);
line(10,10,10,30);
line(10,30,5,25);
line(10,30,15,25);
stroke(255);
point(10,10);
}

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Rotate Canvas

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Re: Rotate Canvas

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