Computer Graphics & Visualization @ufrj.br
Canvas primerCanvas primer IISVG IntroWebGL primer with reglShadertoy style drawingTransformation demoModelview DemoModel, View and Projection DemoWebGL CubeCatmull Clark SubdivisionThree.js basicsPhong Illumination modelHalf-edge data structureIterated Function SystemsRaytracingTextured sphereEnvironment mappingPhysical animation with shape matchingShape matching2D GJK and EPA algorithmsOmohundro balltree construction algorithmsPlatonic Solids PlaygroundElliptic billiards 3-periodics in space-time3D LabyrinthBrush drawingBump mappingFractal TerrainModel viewerKeyframe animationTextured planeSimple Adaptive Mosaic EffectsWallpaper GroupsRay marchingVolume rendering with slice compositingDisplaying 3D RBFs with ray marchingFunções 2D úteisRandom space-filling curvesGPU-IO3D Apollonian Sphere PackingsCircle inversion fractalsApollonian gasket construction by inversionSmooth PolygonDocument image segmentationB-SplinesStencil bufferNoise LoopsSimplex noise exerciserDeformation with RBFsRandom shapes in a gridHobby curvesLane-Riesenfeld subdivision
Minimal WebGL Program
canvas = html`<canvas width=600 height=400>`
gl = canvas.getContext("webgl")
program = {
// create program
let program = gl.createProgram();
// compile vertex shader
let vertexShader = gl.createShader(gl.VERTEX_SHADER);
gl.shaderSource(vertexShader, vertexShaderSrc);
gl.compileShader(vertexShader);
// compile fragment shader
let fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);
gl.shaderSource(fragmentShader, fragmentShaderSrc);
gl.compileShader(fragmentShader);
// link compiled shaders into program
gl.attachShader(program, vertexShader);
gl.attachShader(program, fragmentShader);
gl.linkProgram(program);
return program
}
vertices = new Float32Array([-1, 1, 1, 0, 0, -1])
vertices
vertexBuffer = gl.createBuffer()
loadVertices = {
gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);
}
vertexLocation = gl.getAttribLocation(program, 'position')
triangleColor = [1, 0, 0, 1]
colorLocation = gl.getUniformLocation(program, 'color')
drawFrame = {
loadVertices; // Reactive dependency!
gl.clearColor(0.0, 0.0, 0.0, 1.0); // Opaque black
gl.clear(gl.COLOR_BUFFER_BIT);
gl.viewport(0, 0, gl.canvas.width, gl.canvas.height);
gl.useProgram(program);
gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
gl.vertexAttribPointer(vertexLocation, 2, gl.FLOAT, false, 0, 0);
gl.enableVertexAttribArray(vertexLocation);
gl.uniform4fv(colorLocation, triangleColor);
gl.drawArrays(gl.TRIANGLES, 0, 3);
}
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
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