Processing sketches used to generate VFX particle textures

00_particle_textures.md

These are Processing sketches that I used to create VFX particle textures in a Unity project.

Usage example:

Disk.pde

Generates a simple disk particle.

Stretched.pde

Generates a vertically stretched disk particle. This is convenient to draw fast-moving particles. The outline is slightly blurred to immitate motion blur effect.

Disk.pde

size(32, 32);
background(0);
fill(255);
noStroke();
float r = width / 2;
circle(r, r, r * 1.5);
save("Disk.png");

Stretched.pde

size(32, 64);
background(0);
fill(255);
noStroke();
float r = width / 2;
float w = r / 1.1;
float h = r * 1.1;
ellipse(r,          h, w * 1.5, h * 1.5);
ellipse(r, height - h, w * 1.5, h * 1.5);
rect(r - w * 1.5 / 2, h, w * 1.5, height - h * 2);
filter(BLUR, 1);
save("Stretched.png");