Computer Graphics & Visualization @ufrj.br
Hobby curvesNoise plane partitionRandom shapes in a gridDeformation with RBFsShape-conforming fibersSynthetic texture algorithmsSimplex noise exerciserNoise LoopsThe Infinity ToyApollonian gasket construction by inversionCircle inversion fractals3D Apollonian Sphere PackingsGPU-IOColor HarmoniesRandom space-filling curvesStyle transfer with magenta-js10 PRINT with SVG and <use>SpirographAnimação com bolasCheap mandalaTruchet Archimedean TilingsWallpaper GroupsSplotchifyColor palettes from one colorFlow fieldsFlow field variationsDrifting squaresSketch MandalaGlobal mode p5Rosace 3Platonic Solids Playground
Kinetic typography
md`<hr>
## Utilities and libraries`
fonts = html`<link
href="https://fonts.googleapis.com/css2?family=Aldrich&family=Bungee&family=Concert+One" rel="stylesheet">`
font = {
let f = `${fontOptions.size}px '${fontOptions.family}'`;
await document.fonts.load(f);
return f
}
//
// returns imageData for our base picture
//
baseImage = function (dx=0,dy=0) {
let [w,h] = [800,600]
let ctx = DOM.context2d(w,h,1)
let margin = 20;
ctx.font = font
let m = ctx.measureText(fontOptions.inputText)
let {actualBoundingBoxLeft:l,actualBoundingBoxRight:r,
actualBoundingBoxAscent:a,actualBoundingBoxDescent:d} = m
ctx.fillText(fontOptions.inputText, margin-l+dx,a+margin+dy)
let imgData = ctx.getImageData(0,0,margin*2+r-l,margin*2+a+d)
imgData.canvas = ctx.canvas
return imgData
}
{
let {w,h,positive,negative} = baseCurves()
let ctx = DOM.context2d(w,h,1)
for (let curve of positive.concat(negative)) {
for (let {x,y} of curve) {
ctx.fillRect(x,y,1,1)
}
}
return ctx.canvas
}
//
// Generates a canvas and imageData for our base picture
//
baseCurves = function () {
let imgdata = baseImage();
let img = imgdata.canvas;
let [w,h] = [imgdata.width,imgdata.height]
let ctx = DOM.context2d(w,h,1)
let circ = getCirculations (imgdata)
let comps = circ.closed.slice(0);
comps.reverse();
function toCurve (array) {
let c = new Curve(...array);
let n = ~~c.perimeter()
return c.resample(n,true)
}
return {
w,h,
positive :comps.filter(comp => comp.inside.length%2 == 0).map(comp => toCurve(comp.points)),
negative :comps.filter(comp => comp.inside.length%2 != 0).map(comp => toCurve(comp.points))
}
}
baseCurves()
d3 = require("d3@6")
import {octave,perlin2,perlin3} from "@mbostock/perlin-noise"
import {combo} from "@esperanc/aggregated-inputs"
import {select,number,radio,text,checkbox} from "@jashkenas/inputs"
import {getCirculations, drawCirculations} from "@esperanc/bitmap-tracing"
import { Vec, Curve } from "@esperanc/2d-geometry-utils"
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