Set Clip

Purpose

The Set Clip function selects an aligned rectangular region of logical coordinate space outside of which no primitives are rendered. The function effects geometry which follows in the code.

Syntax

X1,Y1 The lower-left corner of a rectangle in logical coordinate space outside of which subsequent geometric primitives are not rendered

X2,Y2 The upper-right corner of the clip region

 

Details

The Clip opcode specifies the current clipping-region attribute to be applied to subsequent geometric primitives; and, it prevents the rendering of pixels outside that region.

To deactivate clipping, the clip opcode is presented without any arguments:

(Clip)

Notes

Non-rectangular clip regions may be handled, though inefficiently, by setting multiple clip regions in a sequence and rerendering the contained primitives.

Default

By default no clipping is performed and the entire logical coordinate space may be viewed, which is equivalent to the following:

Implementation in WHIP! Versions

See Also