常用插值函数 / Bruce He

Biu biu biu...

Published

Edited

Sep 11, 2021

# 常用插值函数

// 算重心坐标

// https://www.scratchapixel.com/lessons/3d-basic-rendering/rasterization-practical-implementation/rasterization-stage

function getBarycentricCoordinates(out, v0, v1, v2, p) {

let area = edgeFunction(v0, v1, v2); // area of the triangle multiplied by 2

let w0 = edgeFunction(v1, v2, p); // signed area of the triangle v1v2p multiplied by 2

let w1 = edgeFunction(v2, v0, p); // signed area of the triangle v2v0p multiplied by 2

let w2 = edgeFunction(v0, v1, p); // signed area of the triangle v0v1p multiplied by 2

// barycentric coordinates are the areas of the sub-triangles divided by the area of the main triangle

w0 /= area;

w1 /= area;

w2 /= area;

return vec3.set(out, w0, w1, w2);

}

glMatrix = require("https://bundle.run/gl-matrix@3.3.0")

vec3 = glMatrix.vec3

Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.

Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.

Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.