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Index › Programming Questions & Help › Syntax Questions › Skew transformation
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Skew transformation? (Read 1028 times)
fabianh
Skew transformation?
Jan 26th, 2006, 2:50pm  
hello!

is there a way to perform a skew transformation? e.g. to do this transformation:

-----
|   |
-----

to

  -----
 /     /
-----



thanks!
fabian Smiley
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fry
Re: Skew transformation?
Reply #1 - Jan 26th, 2006, 3:07pm  
find the matrix for skew (sheer) somewhere on the web and then apply via applyMatrix(). i don't know it offhand but i know it's simple to do.
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WWW  
fabianh
Re: Skew transformation?
Reply #2 - Jan 26th, 2006, 3:33pm  
ah, i see - sounds like it'll work out Smiley

thanks!
fabian
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eskimoblood
Re: Skew transformation?
Reply #3 - Jan 26th, 2006, 3:35pm  
Maybe this is enough?

Code:

int[] point1, point2,point3 ,point4;
void setup(){
size(300,300);
  point1=new int[]{
    10,10  };
  point2=new int[]{
    30,10  };
  point3=new int[]{
    30,30  };
  point4=new int[]{
    10,30  };
}
void draw(){
  background(255);

  beginShape();
  vertex(point1[0]+mouseX,point1[1]);
  vertex(point2[0]+mouseX,point2[1]);
  vertex(point3[0],point3[1]);
  vertex(point4[0],point4[1]);
  vertex(point1[0]+mouseX,point1[1]);
  endShape();
}
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Andreas Köberle {eskimoblood}
222550793  
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