Is there a way of using blending options (like ADD, MULTIPLY, BURN, etc.) with fill/stroke color?

General Discussion Other

patakk

Is there a way of using blending options (like ADD, MULTIPLY, BURN, etc.) with fill/stroke color?

in General Discussion • Other • 11 months ago

I'm familiar with blending options when dealing with images, but is it possible to something like this?:

So, I'd draw three ellipses and each of them would have a different fill (red, green and blue) and all of them would have a LIGHTEN type of blend (that's the one from Photoshop, I don't know if it exists in Processing).

Thanks in advance,
Cheers

Replies(1)

v.k.

Re: Is there a way of using blending options (like ADD, MULTIPLY, BURN, etc.) with fill/stroke color?

11 months ago

Maybe draw to a PGraphics and use it in image call?

I made this, a long tome ago, may inspire you :)

disclaimer, I just copied and pasted an old code, (not even re read it, but it works) don't know what i may contain...

Quad que = new Quad();
PImage img ;
void setup(){
size (400,400);
background(0);
rectMode(CENTER);
}
void draw(){
background(0);
que.q();
}
class Quad{
color R,G,B;
int varR,varG,varB;
Quad(){
}
void q(){
varR=255;
varG=255;
varB=255;
R = color(varR,000,000);
G = color(000,varG,000);
B = color(000,000 ,varB);
PxQuadAdd(110,110,50,50,R);
PxQuadAdd(mouseX,mouseY,50,50,B);
PxQuadAdd(100,100,50,50,G);
PxQuadAdd(200,100,50,50,#FFC884);
}
}
void PxLine(int in_xis, int in_ypi, int in_tam, int in_cor){
loadPixels();
for(int i=0; i<in_tam+1;i++){
pixels[in_ypi*width+(in_xis+i)] = in_cor;}
updatePixels();
}
void PxQuadAdd(int in_xis, int in_ypi, int in_tamxis, int in_tamypi,int in_cor){
loadPixels();
for(int i=0; i< (in_tamxis); i++){
for(int a=0; a< (in_tamypi); a++){
pixels[(in_ypi+a)*width+(in_xis+i)] = blendColor(pixels[(in_ypi+a)*width+(in_xis+i)],in_cor,ADD);}
}
updatePixels();
blend( in_xis, in_ypi, in_tamxis, in_tamypi, in_xis, in_ypi, in_tamxis, in_tamypi, BURN);
}

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