p5.HeightToNormal
Convert a height map to a normal map
Usage
new p5(p => {
let gfx, h2n;
p.setup = _ => {
p.createCanvas(500, 500);
p.background(0);
gfx = p.createGraphics(p.width, p.height);
h2n = new p.HeightToNormal(p.width, p.height);
}
p.draw = _ => {
gfx.push();
gfx.strokeWeight(3);
gfx.stroke(100);
gfx.fill(255);
gfx.ellipse(p.mouseX, p.mouseY, 150);
gfx.pop();
/*
last two arguments are optional
strength - Strength of the normal. Values closer
to 0 will make z component of vectors
have more influence pointing 'outwards'.
Typical values: 0.001 - 10
Default value is 2.
level - Typical values: 5 - 7.
Larger values will make the z component of the normal
vector have a stronger influence.
Default value is 7.
*/
let normalMap = h2n.get(gfx, 2, 7);
p.image(normalMap, 0, 0);
}
p.mousePressed = _ => {
gfx.filter(p.BLUR, 1);
}
});
Development
$ npm run start
Build
$ npm run build