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GLGETATTRIBLOCATION(3G) OpenGL Manual GLGETATTRIBLOCATION(3G)
glGetAttribLocation - Returns the location of an attribute variable
GLint glGetAttribLocation(GLuint program, const GLchar *name);
Specifies the program object to be queried.
Points to a null terminated string containing the name of the attribute variable whose
location is to be queried.
glGetAttribLocation queries the previously linked program object specified by program for
the attribute variable specified by name and returns the index of the generic vertex
attribute that is bound to that attribute variable. If name is a matrix attribute
variable, the index of the first column of the matrix is returned. If the named attribute
variable is not an active attribute in the specified program object or if name starts with
the reserved prefix "gl_", a value of -1 is returned.
The association between an attribute variable name and a generic attribute index can be
specified at any time by calling glBindAttribLocation(). Attribute bindings do not go into
effect until glLinkProgram() is called. After a program object has been linked
successfully, the index values for attribute variables remain fixed until the next link
command occurs. The attribute values can only be queried after a link if the link was
successful. glGetAttribLocation returns the binding that actually went into effect the
last time glLinkProgram() was called for the specified program object. Attribute bindings
that have been specified since the last link operation are not returned by
GL_INVALID_OPERATION is generated if program is not a value generated by OpenGL.
GL_INVALID_OPERATION is generated if program is not a program object.
GL_INVALID_OPERATION is generated if program has not been successfully linked.
glGetActiveAttrib() with argument program and the index of an active attribute
glBindAttribLocation(), glLinkProgram(), glVertexAttrib(), glVertexAttribPointer()
Copyright (C) 2003-2005 3Dlabs Inc. Ltd. This material may be distributed subject to the
terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999.
opengl.org 06/10/2014 GLGETATTRIBLOCATION(3G)
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