Triangle

In ixfx, a Triangle consists of three Points

type Triangle = {
  a: Point;
  b: Point;
  c: Point;
}

Once you have that there are a bunch of functions to help you work with circles.

angles - interior angles
anglesDegrees - interior angles in degrees
apply - apply a function to each corner point
area - calculate area of triangle
bbox - compute bounding box
centroid - roughly center point of a triangle
corners - corner positions
edges - get edges as Lines
innerCircle - largest circle enclosed by triangle
lengths - compute length of edges
outerCircle - largest circle touching corners of triangle
perimeter - sum of edge lengths
rotate
rotateByVertex

Comparison with other shapes

intersectsPoint - true if point is within or on boundary of triangle

Creating/conversion

equilateralFromVertex - create an equilateral triangle from one vertex
fromFlatArray - convert from set of coordinates in flat array
fromPoints - convert from set of points
fromRadius - create from an origin and radius
toFlatArray

Barycentric coordinates

barycentricCoord - get the Barycentric coordinate given a number or point
barycentricToCartesian - convert a Barycentric coordinate to Cartesian

Kinds

Importing

// Sub module
import { Triangles } from "@ixfx/geometry.js"
// Eg: Triangles.bbox();

// Whole module
import * as Geometry from "@ixfx/geometry.js"
// Eg: Geometry.Triangles.bbox();

// From bundle
import { Geometry } from "@ixfx"
// Eg: Geometry.Triangles.bbox();

// And within your HTML's <HEAD> </HEAD> block:
<script type="importmap">{ "imports": { "@ixfx":"/ixfx/index.js", "@ixfx/": "/ixfx/" } }</script>

// Sub module from parent
import { Triangles } from "@ixfx/geometry.js"
// Eg: Triangles.bbox();

// Whole parent module
import * as Geometry from "@ixfx/geometry.js"
// Eg: Geometry.Triangles.bbox();

// From the bundle
import { Geometry } from "@ixfx/bundle.js"
// Eg: Geometry.Triangles.bbox();

// Sub module from parent
import { Triangles } from "https://unpkg.com/@ixfx/geometry/bundle"
// Eg: Triangles.bbox();

// Whole parent module
import * as Geometry from "https://unpkg.com/@ixfx/geometry/bundle"
// Eg: Geometry.Triangles.bbox();

// Single module from the bundle
import { Geometry } from "https://unpkg.com/@ixfx/bundle"
// Eg: Geometry.Triangles.bbox();