The Wiert Corner - irregular stream of stuff: jpluimers

Sometimes a generic answer to a specific answer gives people a lot more insight into what they actually want to accomplish than a specific answer.

Plus that the knowledge does not only apply to VCL in any Delphi version: it works in any development environment where you can draw.

That’s why I like this 2D transformation answer so much:

A Delphi TShape is nothing more than drawing a bunch of vector graphics.

You can “rotate” the X/Y coordinates themselves with a 2-D transformation matrix. Computer Graphics 101:

• http://www.cs.uic.edu/~jbell/CourseNotes/ComputerGraphics/2DTransforms.html
• http://www.willamette.edu/~gorr/classes/GeneralGraphics/Transforms/transforms2d.htm

Thanks paulsm4!

–jeroen

delphi – Change orientation of a shape – Stack Overflow.