API Reference > geometry-core > CartesianGeometry > Vector3d > dotProductStartEnd dotProductStartEnd Method Returns the dot product of this vector with the with vector from pointA to pointB dotProductStartEnd(pointA: Readonly<WritableXYAndZ>, pointB: Readonly<WritableXYAndZ>): number Parameter Type Description pointA Readonly<WritableXYAndZ> start point of second vector of dot product pointB Readonly<WritableXYAndZ> end point of second vector of dot product Returns - number Defined in geometry3d/Point3dVector3d.ts Line 1099 Last Updated: 11 June, 2024