BarycentricTriangle Class
3 points defining a triangle to be evaluated with barycentric coordinates.
Methods
Name | Description | |
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constructor(point0: Point3d, point1: Point3d, point2: Point3d): BarycentricTriangle Protected | Constructor. | |
centroid(result?: Point3d): Point3d | Return the centroid of the 3 points. | |
circumcenter(result?: Point3d): Point3d | Return the circumcenter of the triangle. | |
clone(result?: BarycentricTriangle): BarycentricTriangle | Return a new BarycentricTriangle with the same coordinates. |
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cloneTransformed(transform: Transform, result?: BarycentricTriangle): BarycentricTriangle | Return a clone of the transformed instance | |
closestPoint(b0: number, b1: number, b2: number): { closestEdgeIndex: number, closestEdgeParam: number } | Compute the projection of a barycentric point p to the triangle T(v_0,v_1,v_2). | |
closestVertexIndex(b0: number, b1: number, b2: number): number | Return the index of the closest triangle vertex to the point given by its barycentric coordinates. | |
distanceSquared(a0: number, a1: number, a2: number, b0: number, b1: number, b2: number): number | Compute the squared distance between two points given by their barycentric coordinates. | |
dotProductOfCrossProductsFromOrigin(other: BarycentricTriangle): number | Return the dot product of the scaled normals of the two triangles. | |
dotProductOfEdgeVectorsAtVertex(baseVertexIndex: number): number | Compute dot product of the edge vectors based at the vertex with the given index. | |
edgeLength(oppositeVertexIndex: number): number | Compute length of the triangle edge opposite the vertex with the given index. | |
edgeLengthSquared(oppositeVertexIndex: number): number | Compute squared length of the triangle edge opposite the vertex with the given index. | |
fractionToPoint(b0: number, b1: number, b2: number, result?: Point3d): Point3d | Sum the triangle points with given scales. | |
incenter(result?: Point3d): Point3d | Return the incenter of the triangle. | |
intersectRay3d(ray: Ray3d, result?: TriangleLocationDetail): TriangleLocationDetail | Compute the intersection of a line (parameterized as a ray) with the plane of this triangle. | |
intersectSegment(point0: Point3d, point1: Point3d, result?: TriangleLocationDetail): TriangleLocationDetail | Compute the intersection of a line (parameterized as a line segment) with the plane of this triangle. | |
isAlmostEqual(other: BarycentricTriangle, tol?: number): boolean | Test for point-by-point isAlmostEqual relationship. |
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normal(result?: Vector3d): undefined | Vector3d | Return the unit normal of the triangle. | |
pointToFraction(point: Point3d, result?: TriangleLocationDetail): TriangleLocationDetail | Compute the projection of the given point onto the plane of this triangle. |
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set(point0: Point3d, point1: Point3d, point2: Point3d): void | Copy contents of (not pointers to) the given points. | |
setFrom(other: BarycentricTriangle): void | Copy all values from other |
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snapLocationToEdge(location: TriangleLocationDetail, distanceTolerance: numberGeometry.smallMetricDistance, parameterTolerance: numberGeometry.smallFloatingPoint): boolean | Adjust the location to the closest edge of the triangle if within either given tolerance. | |
create(point0: Point3d, point1: Point3d, point2: Point3d, result?: BarycentricTriangle): BarycentricTriangle Static | Create a triangle with coordinates cloned from given points. | |
createXYZXYZXYZ(x0: number, y0: number, z0: number, x1: number, y1: number, z1: number, x2: number, y2: number, z2: number, result?: BarycentricTriangle): BarycentricTriangle Static | Create a BarycentricTriangle with coordinates given by enumerated x,y,z of the 3 points. |
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edgeOppositeVertexIndexToStartVertexIndex(edgeIndex: number): number Static | Convert from opposite-vertex to start-vertex edge indexing. | |
edgeStartVertexIndexToOppositeVertexIndex(startVertexIndex: number): number Static | Convert from start-vertex to opposite-vertex edge indexing. | |
isInsideOrOnTriangle(b0: number, b1: number, b2: number): boolean Static | Examine a point's barycentric coordinates to determine if it lies inside the triangle or on an edge/vertex. | |
isInsideTriangle(b0: number, b1: number, b2: number): boolean Static | Examine a point's barycentric coordinates to determine if it lies inside the triangle but not on an edge/vertex. |
Properties
Name | Type | Description | |
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area Accessor ReadOnly | number | Return the area of the triangle. | |
aspectRatio Accessor ReadOnly | number | Return area divided by sum of squared lengths. | |
edgeLength2 Protected | number[] | Edge length squared cache, indexed by opposite vertex index | |
perimeter Accessor ReadOnly | number | Return the perimeter of the triangle. | |
points | Point3d[] | Array of 3 point coordinates for the triangle. |
Defined in
- geometry3d/BarycentricTriangle.ts Line 136
Last Updated: 14 November, 2024
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