computeInCircleDeterminantIsStrongPositive MethodStatic

• nodeA is a given node
• nodeA1 is its nodeA.faceSuccessor
• nodeA2 is nodeA1.faceSuccessor, i.e. 3rd node of triangle A
• nodeB is nodeA.edgeMate, i.e. a node in the "other" triangle at nodeA's edge
• nodeB1 is nodeB.faceSuccessor
• nodeB2 is nodeB1.faceSuccessor, i.e the 3rd node of triangle B Construct (as simple doubles, to avoid object creation) xy vectors from:
• (ux,uy): nodeA to nodeA1, i.e. the shared edge
• (vx,vy): nodeA to nodeA2,
• (wx,wy): nodeA to nodeB2
• this determinant is positive if nodeA is "in the circle" of nodeB2, nodeA1, nodeA2
• Return true if clearly positive
• Return false if clearly negative or almost zero.

computeInCircleDeterminantIsStrongPositive(nodeA: ): boolean

Returns - boolean

the determinant as modified per comment (but undefined if the faces are not triangles as expected.)

Defined in

• core/geometry/src/topology/Triangulation.ts Line 79

Last Updated: 13 June, 2024