Shearing a shape in 2D

Programming Questions

buckdanny

in Programming Questions • 2 years ago

Hi,

I found this topic
http://processing.org/discourse/yabb2/YaBB.pl?num=1264104180

and i really wont to do the same i need to shear (slant whatever) a shape

but not with OPENGL renderer or P3D i only need 2D and want to use P2D renderer.

Is this possible?

this is a snippet from the old topic working great with P3D

float f = 2; //shear factor
pushMatrix();
applyMatrix(1,f,0,0,
0,1,0,0,
0,0,1,0,
0,0,0,1);
rect(0,0,100,100);
popMatrix();


Thank you!

Replies(2)

buckdanny

Re: Shearing a shape in 2D

2 years ago

aahh,

i think

applyMatrix(1,f,1,0,1,0);

do the job!

sorry,

bluefairy9

Re: Shearing a shape in 2D

2 years ago

I am trying to do the SHEAR() function but for a given

loaded image...

but I constantly have some error..

can you please HELP :(

This is what I have until now...

final int MARGIN = 100;

final int WIDTH = 200;

PImage img;

void setup()

{

imagen =loadImage("Image.jpg");

size(img.width*2,img.height*2);

}

void draw()

{

background(255);

float amount = (float) mouseX / width;

float offset = WIDTH * amount;

beginShape();

vertex(MARGIN, height - MARGIN);

vertex(MARGIN + offset, MARGIN);

vertex(MARGIN + offset + WIDTH, MARGIN);

vertex(MARGIN + WIDTH, height - MARGIN);

endShape(CLOSE);

}

Top Reply