Method XbpPresSpace():setGraTransform() Foundation
Sets or returns the graphic transformation matrix.
:setGraTransform( [<aMatrix>], [<nMode>] ) --> aOldMatrix
|GRA_TRANSFORM_REPLACE *)||Replace the existing transformation in <aMatrix> after the transformation|
|GRA_TRANSFORM_ADD||Keep the existing transformation in <aMatrix> and calculate an additional transformation|
The :setGraTransform() method returns a copy of the current transformation matrix. When a new matrix is set using the parameter <aMatrix>, this method returns the previous transformation matrix.
The method :setGraTransform() defines a transformation matrix for the presentation space. Graphic transformations are calculated using the functions GraRotate(), GraScale() or GraTranslate() (rotation, scaling, and translation, respectively). The result of these calculations is contained in the transformation matrix <aMatrix>. After the calculation, the matrix can be passed to the presentation space and the transformation becomes effective for graphic output.
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