Performing Geometric Operations on Transform Clips
QuickDraw GX provides a number of functions that allow you to perform constructive geometry operations on the clip shapes of transform objects. Each of these functions replaces the clip property of a transform object with the result of an operation combining the original clip geometry with the geometry of another shape. The functions are
GXUnionTransform, which combines the transform clip with a shape geometryGXIntersectTransform, which intersects the transform clip with a shape geometryGXDifferenceTransform, which subtracts a shape geometry from the transform clipGXReverseDifferenceTransform, which subtracts the transform clip from a shape geometry- The
GXExcludeTransform, which performs an exclusive-OR operation with the transform clip and a shape geometry
Subtopics
- GXUnionTransform
- GXIntersectTransform
- GXDifferenceTransform
- GXReverseDifferenceTransform
- GXExcludeTransform