Method GL.glEnable()

Method glEnable

void glEnable(int cap)

Description

glEnable and glDisable enable and disable various capabilities. Use glIsEnabled or glGet to determine the current setting of any capability. The initial value for each capability with the exception of GL_DITHER is GL_FALSE. The initial value for GL_DITHER is GL_TRUE.

Both glEnable and glDisable take a single argument, cap, which can assume one of the following values:

GL_ALPHA_TEST	If enabled, do alpha testing. See glAlphaFunc.
GL_AUTO_NORMAL	If enabled, generate normal vectors when either GL_MAP2_VERTEX_3 or GL_MAP2_VERTEX_4 is used to generate vertices. See `glMap2`.
GL_BLEND	If enabled, blend the incoming RGBA color values with the values in the color buffers. See glBlendFunc.
`GL_CLIP_PLANE`i	If enabled, clip geometry against user-defined clipping plane i. See `glClipPlane`.
GL_COLOR_LOGIC_OP	If enabled, apply the currently selected logical operation to the incoming RGBA color and color buffer values. See glLogicOp.
GL_COLOR_MATERIAL	If enabled, have one or more material parameters track the current color. See glColorMaterial.
GL_CULL_FACE	If enabled, cull polygons based on their winding in window coordinates. See glCullFace.
GL_DEPTH_TEST	If enabled, do depth comparisons and update the depth buffer. Note that 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. See glDepthFunc and glDepthRange.
GL_DITHER	If enabled, dither color components or indices before they are written to the color buffer.
GL_FOG	If enabled, blend a fog color into the posttexturing color. See glFog.
GL_INDEX_LOGIC_OP	If enabled, apply the currently selected logical operation to the incoming index and color buffer indices. See glLogicOp.
`GL_LIGHT`i	If enabled, include light i in the evaluation of the lighting equation. See glLightModel and glLight.
GL_LIGHTING	If enabled, use the current lighting parameters to compute the vertex color or index. Otherwise, simply associate the current color or index with each vertex. See glMaterial, glLightModel, and glLight.
GL_LINE_SMOOTH	If enabled, draw lines with correct filtering. Otherwise, draw aliased lines. See glLineWidth.
GL_LINE_STIPPLE	If enabled, use the current line stipple pattern when drawing lines. See glLineStipple.
GL_MAP1_COLOR_4	If enabled, calls to glEvalCoord, `glEvalMesh1`, and glEvalPoint generate RGBA values. See `glMap1`.
GL_MAP1_INDEX	If enabled, calls to glEvalCoord, `glEvalMesh1`, and glEvalPoint generate color indices. See `glMap1`.
GL_MAP1_NORMAL	If enabled, calls to glEvalCoord, `glEvalMesh1`, and glEvalPoint generate normals. See `glMap1`.
GL_MAP1_TEXTURE_COORD_1	If enabled, calls to glEvalCoord, `glEvalMesh1`, and glEvalPoint generate s texture coordinates. See `glMap1`.
GL_MAP1_TEXTURE_COORD_2	If enabled, calls to glEvalCoord, `glEvalMesh1`, and glEvalPoint generate s and t texture coordinates. See `glMap1`.
GL_MAP1_TEXTURE_COORD_3	If enabled, calls to glEvalCoord, `glEvalMesh1`, and glEvalPoint generate s, t, and r texture coordinates. See `glMap1`.
GL_MAP1_TEXTURE_COORD_4	If enabled, calls to glEvalCoord, `glEvalMesh1`, and glEvalPoint generate s, t, r, and q texture coordinates. See `glMap1`.
GL_MAP1_VERTEX_3	If enabled, calls to glEvalCoord, `glEvalMesh1`, and glEvalPoint generate x, y, and z vertex coordinates. See `glMap1`.
GL_MAP1_VERTEX_4	If enabled, calls to glEvalCoord, `glEvalMesh1`, and glEvalPoint generate homogeneous x, y, z, and w vertex coordinates. See `glMap1`.
GL_MAP2_COLOR_4	If enabled, calls to glEvalCoord, `glEvalMesh2`, and glEvalPoint generate RGBA values. See `glMap2`.
GL_MAP2_INDEX	If enabled, calls to glEvalCoord, `glEvalMesh2`, and glEvalPoint generate color indices. See `glMap2`.
GL_MAP2_NORMAL	If enabled, calls to glEvalCoord, `glEvalMesh2`, and glEvalPoint generate normals. See `glMap2`.
GL_MAP2_TEXTURE_COORD_1	If enabled, calls to glEvalCoord, `glEvalMesh2`, and glEvalPoint generate s texture coordinates. See `glMap2`.
GL_MAP2_TEXTURE_COORD_2	If enabled, calls to glEvalCoord, `glEvalMesh2`, and glEvalPoint generate s and t texture coordinates. See `glMap2`.
GL_MAP2_TEXTURE_COORD_3	If enabled, calls to glEvalCoord, `glEvalMesh2`, and glEvalPoint generate s, t, and r texture coordinates. See `glMap2`.
GL_MAP2_TEXTURE_COORD_4	If enabled, calls to glEvalCoord, `glEvalMesh2`, and glEvalPoint generate s, t, r, and q texture coordinates. See `glMap2`.
GL_MAP2_VERTEX_3	If enabled, calls to glEvalCoord, `glEvalMesh2`, and glEvalPoint generate x, y, and z vertex coordinates. See `glMap2`.
GL_MAP2_VERTEX_4	If enabled, calls to glEvalCoord, `glEvalMesh2`, and glEvalPoint generate homogeneous x, y, z, and w vertex coordinates. See `glMap2`.
GL_NORMALIZE	If enabled, normal vectors specified with glNormal are scaled to unit length after transformation. See glNormal.
GL_POINT_SMOOTH	If enabled, draw points with proper filtering. Otherwise, draw aliased points. See glPointSize.
GL_POLYGON_OFFSET_FILL	If enabled, and if the polygon is rendered in GL_FILL mode, an offset is added to depth values of a polygon's fragments before the depth comparison is performed. See glPolygonOffset.
GL_POLYGON_OFFSET_LINE	If enabled, and if the polygon is rendered in GL_LINE mode, an offset is added to depth values of a polygon's fragments before the depth comparison is performed. See glPolygonOffset.
GL_POLYGON_OFFSET_POINT	If enabled, an offset is added to depth values of a polygon's fragments before the depth comparison is performed, if the polygon is rendered in GL_POINT mode. See glPolygonOffset.
GL_POLYGON_SMOOTH	If enabled, draw polygons with proper filtering. Otherwise, draw aliased polygons. For correct anti-aliased polygons, an alpha buffer is needed and the polygons must be sorted front to back.
GL_POLYGON_STIPPLE	If enabled, use the current polygon stipple pattern when rendering polygons. See `glPolygonStipple`.
GL_SCISSOR_TEST	If enabled, discard fragments that are outside the scissor rectangle. See glScissor.
GL_STENCIL_TEST	If enabled, do stencil testing and update the stencil buffer. See glStencilFunc and glStencilOp.
GL_TEXTURE_1D	If enabled, one-dimensional texturing is performed (unless two-dimensional texturing is also enabled). See `glTexImage1D`.
GL_TEXTURE_2D	If enabled, two-dimensional texturing is performed. See glTexImage2D.
GL_TEXTURE_GEN_Q	If enabled, the q texture coordinate is computed using the texture generation function defined with glTexGen. Otherwise, the current q texture coordinate is used. See glTexGen.
GL_TEXTURE_GEN_R	If enabled, the r texture coordinate is computed using the texture generation function defined with glTexGen. Otherwise, the current r texture coordinate is used. See glTexGen.
GL_TEXTURE_GEN_S	If enabled, the s texture coordinate is computed using the texture generation function defined with glTexGen. Otherwise, the current s texture coordinate is used. See glTexGen.
GL_TEXTURE_GEN_T	If enabled, the t texture coordinate is computed using the texture generation function defined with glTexGen. Otherwise, the current t texture coordinate is used. See glTexGen.

Parameter cap

Specifies a symbolic constant indicating a GL capability.

Parameter cap

Specifies a symbolic constant indicating a GL capability.

Throws

GL_INVALID_ENUM is generated if cap is not one of the values listed previously.

GL_INVALID_OPERATION is generated if glEnable or glDisable is executed between the execution of glBegin and the corresponding execution of glEnd.