drawing a line with from color => to color

Programming Questions

miasma

drawing a line with from color => to color

in Programming Questions • 1 years ago

Hello,

how can I draw a line or even a curve, where I can specify a start and end color? line(from, to, colorFrom, colorTo) or something similar?

kind regards,

Johannes

Replies(3)

thomas.di..

Re: drawing a line with from color => to color

1 years ago

if you use OPENGL, P3D or P2D you can do it like this:

import processing.opengl.*;
void setup() {
size( 300, 300, OPENGL );
}
void draw() {
background(255);
strokeWeight(10);
line(20, 20, mouseX, mouseY, color(255, 0, 0), color(0, 255, 0 ));
println(frameRate);
}
void line(int x_s, int y_s, int x_e, int y_e, int col_s, int col_e){
beginShape();
stroke(col_s);
vertex(x_s, y_s);
stroke(col_e);
vertex(x_e, y_e);
endShape();
}

miasma

Re: drawing a line with from color => to color

1 years ago

Thanks, but I have to use the default renderer on Linux, thus it seems it doesn't work (P2D, P3D and OpenGL seem to be pretty ugly and it doesn't work either). How does it work with every renderer?

kind regards,

Johannes

PhiLho

Re: drawing a line with from color => to color

1 years ago

" P2D, P3D and OpenGL seem to be pretty ugly and it doesn't work either"
Well if they are ugly, it means it works, no? You should be more precise in defining what "ugly" means, and what "doesn't work" means. Hint: use smooth() in P2D to have something looking better.

Why do you have to use the default renderer?

On a more positive note, you can do it yourself by drawing a bunch of short line segments, defining their color with lerpColor().

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