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DePauwREU2013 / scales

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Add Clipping and Masking #8

Closed mfansler closed 11 years ago

mfansler commented 11 years ago

Relevant documentation to look at in the Java AWT library are:

mfansler commented 11 years ago

The setClip method of the java.awt.Graphics class accepts either the explicit dimensions of a rectangle or a java.awt.Shape. Initially I only allowed the Clip graphic to accept scales..Shape instances, however, that is extremely limited, since it disallows the inclusion of even basic translates, etc.. For the time being I've made it so setClip can accept any Graphic, but unless the object is either a Shape or a Transform wrapping a Shape, the render will default back to merely using the bounding box. In most cases (e.g., Image, Bitmap) the bounding box is a good approximation anyway. However, there are edge cases like trying to use a graphic that includes a fill or a stroke which are going to fail.

While this commit is a start, we should explore what options we have for casting Graphic objects to Shape's. One thought I had was to add a def shape: Shape to the Graphic trait, so that every Graphic is responsible for knowing what Shape best describes it.

mfansler commented 11 years ago

Graphic trait now includes shape: java.awt.Shape and this is then used for all clipping.