GLDEPTHFUNC - Online Linux Manual PageSection : 3G
NAME"glDepthFunc − specify the value used for depth buffer comparisons
C SPECIFICATIONvoid glDepthFunc( GLenum func )
PARAMETERSfunc  Specifies the depth comparison function. Symbolic constants ­GL_NEVER, ­GL_LESS, ­GL_EQUAL, ­GL_LEQUAL, ­GL_GREATER, ­GL_NOTEQUAL, ­GL_GEQUAL, and ­GL_ALWAYS are accepted. The initial value is ­GL_LESS.
DESCRIPTION­glDepthFunc specifies the function used to compare each incoming pixel depth value with the depth value present in the depth buffer. The comparison is performed only if depth testing is enabled. (See ­glEnable and ­glDisable of ­GL_DEPTH_TEST.) func specifies the conditions under which the pixel will be drawn. The comparison functions are as follows: ­GL_NEVER  Never passes. ­GL_LESS  Passes if the incoming depth value is less than the stored depth value. ­GL_EQUAL  Passes if the incoming depth value is equal to the stored depth value. ­GL_LEQUAL  Passes if the incoming depth value is less than or equal to the stored depth value. ­GL_GREATER  Passes if the incoming depth value is greater than the stored depth value. ­GL_NOTEQUAL  Passes if the incoming depth value is not equal to the stored depth value. ­GL_GEQUAL  Passes if the incoming depth value is greater than or equal to the stored depth value. ­GL_ALWAYS  Always passes. The initial value of func is ­GL_LESS. Initially, depth testing is disabled. .NOTES Even if the depth buffer exists and the depth mask is non-zero, the depth buffer is not updated if the depth test is disabled.
ERRORS­GL_INVALID_ENUM is generated if func is not an accepted value. ­GL_INVALID_OPERATION is generated if ­glDepthFunc is executed between the execution of ­glBegin and the corresponding execution of ­glEnd.
ASSOCIATED GETS­glGet with argument ­GL_DEPTH_FUNC
­glIsEnabled with argument ­GL_DEPTH_TEST
SEE ALSO­glDepthRange(3G), ­glEnable(3G), ­glPolygonOffset(3G) 0
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Online Linux Manual Page   :   Version   :   Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.05
Online Linux Manual Page   :   Library   :   lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
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