'\" te '\"macro stdmacro .ds Vn Version 1.2 .ds Dt 24 September 1999 .ds Re Release 1.2.1 .ds Dp May 22 14:46 .ds Dm 2 May 22 14: .ds Xs 51670 6 .TH GLVERTEXPOINTER 3G .SH NAME .B "glVertexPointer \- define an array of vertex data .SH C SPECIFICATION void \f3glVertexPointer\fP( GLint \fIsize\fP, .nf .ta \w'\f3void \fPglVertexPointer( 'u GLenum \fItype\fP, GLsizei \fIstride\fP, const GLvoid \fI*pointer\fP ) .fi .EQ delim $$ .EN .SH PARAMETERS .TP \w'\fIpointer\fP\ \ 'u \f2size\fP Specifies the number of coordinates per vertex; must be 2, 3, or 4. The initial value is 4. .TP \f2type\fP Specifies the data type of each coordinate in the array. Symbolic constants \%\f3GL_SHORT\fP, \%\f3GL_INT\fP, \%\f3GL_FLOAT\fP, and \%\f3GL_DOUBLE\fP are accepted. The initial value is \%\f3GL_FLOAT\fP. .TP \f2stride\fP Specifies the byte offset between consecutive vertices. If \f2stride\fP is 0, the vertices are understood to be tightly packed in the array. The initial value is 0. .TP \f2pointer\fP Specifies a pointer to the first coordinate of the first vertex in the array. The initial value is 0. .SH DESCRIPTION \%\f3glVertexPointer\fP specifies the location and data of an array of vertex coordinates to use when rendering. \f2size\fP specifies the number of coordinates per vertex and \f2type\fP the data type of the coordinates. \f2stride\fP specifies the byte stride from one vertex to the next allowing vertices 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 \%\f3glInterleavedArrays\fP.) When a vertex array is specified, \f2size\fP, \f2type\fP, \f2stride\fP, and \f2pointer\fP are saved as client-side state. .P To enable and disable the vertex array, call \%\f3glEnableClientState\fP and .br \%\f3glDisableClientState\fP with the argument \%\f3GL_VERTEX_ARRAY\fP. If enabled, the vertex array is used when \%\f3glDrawArrays\fP, \%\f3glDrawElements\fP, or \%\f3glArrayElement\fP is called. .P Use \%\f3glDrawArrays\fP to construct a sequence of primitives (all of the same type) from prespecified vertex and vertex attribute arrays. Use \%\f3glArrayElement\fP to specify primitives by indexing vertices and vertex attributes and \%\f3glDrawElements\fP to construct a sequence of primitives by indexing vertices and vertex attributes. .SH NOTES \%\f3glVertexPointer\fP is available only if the GL version is 1.1 or greater. .P The vertex array is initially disabled and isn't accessed when \%\f3glArrayElement\fP, \%\f3glDrawElements\fP or \%\f3glDrawArrays\fP is called. .P Execution of \%\f3glVertexPointer\fP is not allowed between the execution of \%\f3glBegin\fP and the corresponding execution of \%\f3glEnd\fP, but an error may or may not be generated. If no error is generated, the operation is undefined. .P \%\f3glVertexPointer\fP is typically implemented on the client side. .P Vertex array parameters are client-side state and are therefore not saved or restored by \%\f3glPushAttrib\fP and \%\f3glPopAttrib\fP. Use \%\f3glPushClientAttrib\fP and \%\f3glPopClientAttrib\fP instead. .SH ERRORS \%\f3GL_INVALID_VALUE\fP is generated if \f2size\fP is not 2, 3, or 4. .P \%\f3GL_INVALID_ENUM\fP is generated if \f2type\fP is is not an accepted value. .P \%\f3GL_INVALID_VALUE\fP is generated if \f2stride\fP is negative. .SH ASSOCIATED GETS \%\f3glIsEnabled\fP with argument \%\f3GL_VERTEX_ARRAY\fP .br \%\f3glGet\fP with argument \%\f3GL_VERTEX_ARRAY_SIZE\fP .br \%\f3glGet\fP with argument \%\f3GL_VERTEX_ARRAY_TYPE\fP .br \%\f3glGet\fP with argument \%\f3GL_VERTEX_ARRAY_STRIDE\fP .br \%\f3glGetPointerv\fP with argument \%\f3GL_VERTEX_ARRAY_POINTER\fP .SH SEE ALSO \%\f3glArrayElement\fP, \%\f3glColorPointer\fP, \%\f3glDrawArrays\fP, \%\f3glDrawElements\fP, \%\f3glDrawRangeElements\fP, \%\f3glEdgeFlagPointer\fP, \%\f3glEnable\fP, \%\f3glGetPointerv\fP, \%\f3glIndexPointer\fP, \%\f3glInterleavedArrays\fP, \%\f3glNormalPointer\fP, \%\f3glPopClientAttrib\fP, \%\f3glPushClientAttrib\fP, \%\f3glTexCoordPointer\fP