Lines Matching refs:fog

24     This extension adds support for layered fog. The layers are
25     specified using a density profile of the fog with respect to the
79     In addition to uniform fog density, fog layers can be specified.
81     density between successive fog layers is implementation dependent.
82     The density profile of the fog with respect to elevation is
87     negative), and the second value specifies the fog density at that
88     elevation. The fog density values are clamped to the range [0.0,
94     state of the fog layer specification is defined by the single 
95     point (0.0, 0.0). The fog density above the maximum user-specified
97     Layered fog computations are defined only for positive elevations;
98     negative elevations result in switching back to uniform range fog model.
125 		    |   Fog   |	    |  \     | 	   |	   To fog equation
137     fragment using the fog layer specification (XXX: how?). This
138     density is used in the fog equation to compute the fog blending
153     The max allowed number of points in the fog layer specification
156     number of points in the current fog layers specification is queried
159     current fog layer specification are queried by calling
187     FOG_LAYERS_POINTS_SGIX	GetIntegerv		Z+		1		fog
188     FOG_GROUND_PLANE_SGIX	GetFloatv		V		(0,0,0,0)	fog
189     FOG_TYPE_SGIX		GetIntegerv		Z+		UNIFORM_SGIX    fog