GL_EXT_polygon_offset_clamp#

Valid APIs#

OpenGL ES 3.1+

Description#

This extension adds a new parameter to the polygon offset function that clamps the calculated offset to a minimum or maximum value. The clamping functionality is useful when polygons are nearly parallel to the view direction because their high slopes can result in arbitrarily large polygon offsets. In the particular case of shadow mapping, the lack of clamping can produce the appearance of unwanted holes when the shadow casting polygons are offset beyond the shadow receiving polygons, and this problem can be alleviated by enforcing a maximum offset value.

Example#

//set max offset
glPolygonOffsetClampEXT(1.0f, 1,0f, 1.0f);