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GLVERTEXPOINTER() GLVERTEXPOINTER() NAME glVertexPointer - define an array of vertex data C SPECIFICATION void glVertexPointer( GLint size, GLenum type, GLsizei stride, const GLvoid *pointer ) delim $$ PARAMETERS size Specifies the number of coordinates per vertex; must be 2, 3, or 4. The initial value is 4. type Specifies the data type of each coordinate in the array. Sym- bolic constants GL_SHORT, GL_INT, GL_FLOAT, and GL_DOUBLE are accepted. The initial value is GL_FLOAT. stride Specifies the byte offset between consecutive vertexes. If stride is 0, the vertexes are understood to be tightly packed in the array. The initial value is 0. pointer Specifies a pointer to the first coordinate of the first ver- tex in the array. DESCRIPTION glVertexPointer specifies the location and data format of an array of vertex coordinates to use when rendering. size specifies the number of coordinates per vertex and type the data type of the coordinates. stride specifies the byte stride from one vertex to the next allowing vertexes and attributes to be packed into a single array or stored in separate arrays. (Single-array storage may be more efficient on some implementations; see glInterleavedArrays.) When a vertex array is specified, size, type, stride, and pointer are saved as client-side state. To enable and disable the vertex array, call glEnableClientState and glDisableClientState with the argument GL_VERTEX_ARRAY. If enabled, the vertex array is used when glDrawArrays, glDrawElements, or glArrayEle- ment is called. Use glDrawArrays to construct a sequence of primitives (all of the same type) from prespecified vertex and vertex attribute arrays. Use glAr- rayElement to specify primitives by indexing vertexes and vertex at- tributes and glDrawElements to construct a sequence of primitives by indexing vertexes and vertex attributes. NOTES glVertexPointer is available only if the GL version is 1.1 or greater. The vertex array is initially disabled and isn't accessed when glAr- rayElement, glDrawElements or glDrawArrays is called. Execution of glVertexPointer is not allowed between the execution of glBegin and the corresponding execution of glEnd, but an error may or may not be generated. If no error is generated, the operation is unde- fined. glVertexPointer is typically implemented on the client side. Vertex array parameters are client-side state and are therefore not saved or restored by glPushAttrib and glPopAttrib. Use glPushClientAt- trib and glPopClientAttrib instead. ERRORS GL_INVALID_VALUE is generated if size is not 2, 3, or 4. GL_INVALID_ENUM is generated if type is is not an accepted value. GL_INVALID_VALUE is generated if stride is negative. ASSOCIATED GETS glIsEnabled with argument GL_VERTEX_ARRAY glGet with argument GL_VERTEX_ARRAY_SIZE glGet with argument GL_VERTEX_ARRAY_TYPE glGet with argument GL_VERTEX_ARRAY_STRIDE glGetPointerv with argument GL_VERTEX_ARRAY_POINTER SEE ALSO glArrayElement, glColorPointer, glDrawArrays, glDrawElements, glEdgeFlagPointer, glEnable, glGetPointerv, glIndexPointer, glInterleavedArrays, glNormalPointer, glPopClientAttrib, glPushClien- tAttrib, glTexCoordPointer GLVERTEXPOINTER()
NAME | C SPECIFICATION | PARAMETERS | DESCRIPTION | NOTES | ERRORS | ASSOCIATED GETS | SEE ALSO
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