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gldrawelements(3g) [osx man page]

GLDRAWELEMENTS(3G)														GLDRAWELEMENTS(3G)

NAME
glDrawElements - render primitives from array data C SPECIFICATION
void glDrawElements( GLenum mode, GLsizei count, GLenum type, const GLvoid *indices ) PARAMETERS
mode Specifies what kind of primitives to render. Symbolic constants GL_POINTS, GL_LINE_STRIP, GL_LINE_LOOP, GL_LINES, GL_TRIANGLE_STRIP, GL_TRIANGLE_FAN, GL_TRIANGLES, GL_QUAD_STRIP, GL_QUADS, and GL_POLYGON are accepted. count Specifies the number of elements to be rendered. type Specifies the type of the values in indices. Must be one of GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT, or GL_UNSIGNED_INT. indices Specifies a pointer to the location where the indices are stored. DESCRIPTION
glDrawElements specifies multiple geometric primitives with very few subroutine calls. Instead of calling a GL function to pass each indi- vidual vertex, normal, texture coordinate, edge flag, or color, you can prespecify separate arrays of vertices, normals, and so on and use them to construct a sequence of primitives with a single call to glDrawElements. When glDrawElements is called, it uses count sequential elements from an enabled array, starting at indices to construct a sequence of geo- metric primitives. mode specifies what kind of primitives are constructed, and how the array elements construct these primitives. If more than one array is enabled, each is used. If GL_VERTEX_ARRAY is not enabled, no geometric primitives are constructed. Vertex attributes that are modified by glDrawElements have an unspecified value after glDrawElements returns. For example, if GL_COLOR_ARRAY is enabled, the value of the current color is undefined after glDrawElements executes. Attributes that aren't modified main- tain their previous values. NOTES
glDrawElements is available only if the GL version is 1.1 or greater. glDrawElements is included in display lists. If glDrawElements is entered into a display list, the necessary array data (determined by the array pointers and enables) is also entered into the display list. Because the array pointers and enables are client-side state, their val- ues affect display lists when the lists are created, not when the lists are executed. ERRORS
GL_INVALID_ENUM is generated if mode is not an accepted value. GL_INVALID_VALUE is generated if count is negative. GL_INVALID_OPERATION is generated if glDrawElements is executed between the execution of glBegin and the corresponding glEnd. SEE ALSO
glArrayElement, glColorPointer, glDrawArrays, glDrawRangeElements, glEdgeFlagPointer, glGetPointerv, glIndexPointer, glInterleavedArrays, glNormalPointer, glTexCoordPointer, glVertexPointer GLDRAWELEMENTS(3G)

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GLDRAWARRAYS(3G)														  GLDRAWARRAYS(3G)

NAME
glDrawArrays - render primitives from array data C SPECIFICATION
void glDrawArrays( GLenum mode, GLint first, GLsizei count ) PARAMETERS
mode Specifies what kind of primitives to render. Symbolic constants GL_POINTS, GL_LINE_STRIP, GL_LINE_LOOP, GL_LINES, GL_TRIANGLE_STRIP, GL_TRIANGLE_FAN, GL_TRIANGLES, GL_QUAD_STRIP, GL_QUADS, and GL_POLYGON are accepted. first Specifies the starting index in the enabled arrays. count Specifies the number of indices to be rendered. DESCRIPTION
glDrawArrays specifies multiple geometric primitives with very few subroutine calls. Instead of calling a GL procedure to pass each indi- vidual vertex, normal, texture coordinate, edge flag, or color, you can prespecify separate arrays of vertices, normals, and colors and use them to construct a sequence of primitives with a single call to glDrawArrays. When glDrawArrays is called, it uses count sequential elements from each enabled array to construct a sequence of geometric primitives, beginning with element first. mode specifies what kind of primitives are constructed, and how the array elements construct those primi- tives. If GL_VERTEX_ARRAY is not enabled, no geometric primitives are generated. Vertex attributes that are modified by glDrawArrays have an unspecified value after glDrawArrays returns. For example, if GL_COLOR_ARRAY is enabled, the value of the current color is undefined after glDrawArrays executes. Attributes that aren't modified remain well defined. NOTES
glDrawArrays is available only if the GL version is 1.1 or greater. glDrawArrays is included in display lists. If glDrawArrays is entered into a display list, the necessary array data (determined by the array pointers and enables) is also entered into the display list. Because the array pointers and enables are client-side state, their val- ues affect display lists when the lists are created, not when the lists are executed. ERRORS
GL_INVALID_ENUM is generated if mode is not an accepted value. GL_INVALID_VALUE is generated if count is negative. GL_INVALID_OPERATION is generated if glDrawArrays is executed between the execution of glBegin and the corresponding glEnd. SEE ALSO
glArrayElement(3G), glColorPointer(3G), glDrawElements(3G), glDrawRangeElements(3G), glEdgeFlagPointer(3G), glGetPointerv(3G), glIndexPointer(3G), glInterleavedArrays(3G), glNormalPointer(3G), glTexCoordPointer(3G), glVertexPointer(3G) GLDRAWARRAYS(3G)
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