Geometry Space
Geometry space is the space within which the position and dimensions of a shape object are first defined. QuickDraw GX starts the drawing process by using the values in a shape's geometry; those values define the shape's fundamental dimensions, and their coordinate space is called geometry space.No distance metric, such as points per inch, is defined for geometry space. Thus, the absolute size of a shape is undefined in geometry space. Also, every shape has its own geometry space; you cannot compare the sizes of two shapes based on their dimensions in geometry space alone. A rectangle 10 units wide in geometry space could end up ten times wider than a rectangle 100 units wide, once both have been drawn.
The left side of Figure 7-14 shows the geometry of a shape object, a filled path shape in the form of a vase. In geometry space, the vase is approximately 100 units by 100 units, and the upper-left corner of its bounding rectangle is at about (0.0, 0.0).
Figure 7-14 A shape geometry and a transform clip geometry
The right side of Figure 7-14 shows the geometry of the clip shape for a transform object. The clip shape is a filled path shape, of approximately the same dimensions and location as the vase shape. The next section shows how the clip shape modifies the appearance of the vase shape (assuming the vase shape object references the transform object containing this clip).
