Returns the keypoint value of the index. For objects participating in collinear, concentric, equal, parallel, perpendicular, tangent, horizontal, or vertical constraints, Keypoint_Index is -1, meaning that the object itself, not a particular keypoint on the object, is constrained. If a constraint object involves an object keypoint (keypoint, point-on, intersect, horizontal align, or vertical align, for example), then the Keypoint_Index returned for that object is not -1, but a value such as igKeyPointStart, igKeyPointEnd, and so forth.
Description
Returns an object and its key point index at a given index.
Returns the keypoint value of the index. For objects participating in collinear, concentric, equal, parallel, perpendicular, tangent, horizontal, or vertical constraints, Keypoint_Index is -1, meaning that the object itself, not a particular keypoint on the object, is constrained. If a constraint object involves an object keypoint (keypoint, point-on, intersect, horizontal align, or vertical align, for example), then the Keypoint_Index returned for that object is not -1, but a value such as igKeyPointStart, igKeyPointEnd, and so forth.