GLGETVERTEXATTRIB - Online Linux Manual PageSection : 3G
Updated : 01/20/2022
Source : [FIXME: source]
Note : [FIXME: manual]
NAMEglGetVertexAttribdv, glGetVertexAttribfv, glGetVertexAttribiv, glGetVertexAttribIiv, glGetVertexAttribIuiv, glGetVertexAttribLdv − Return a generic vertex attribute parameter
C SPECIFICATIONvoid glGetVertexAttribdv(GLuint index, GLenum pname, GLdouble *params); void glGetVertexAttribfv(GLuint index, GLenum pname, GLfloat *params); void glGetVertexAttribiv(GLuint index, GLenum pname, GLint *params); void glGetVertexAttribIiv(GLuint index, GLenum pname, GLint *params); void glGetVertexAttribIuiv(GLuint index, GLenum pname, GLuint *params); void glGetVertexAttribLdv(GLuint index, GLenum pname, GLdouble *params);
PARAMETERSindex Specifies the generic vertex attribute parameter to be queried. pname Specifies the symbolic name of the vertex attribute parameter to be queried. Accepted values are GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING, GL_VERTEX_ATTRIB_ARRAY_ENABLED, GL_VERTEX_ATTRIB_ARRAY_SIZE, GL_VERTEX_ATTRIB_ARRAY_STRIDE, GL_VERTEX_ATTRIB_ARRAY_TYPE, GL_VERTEX_ATTRIB_ARRAY_NORMALIZED, GL_VERTEX_ATTRIB_ARRAY_INTEGER, GL_VERTEX_ATTRIB_ARRAY_DIVISOR, or GL_CURRENT_VERTEX_ATTRIB. params Returns the requested data.
DESCRIPTIONglGetVertexAttrib returns in params the value of a generic vertex attribute parameter. The generic vertex attribute to be queried is specified by index, and the parameter to be queried is specified by pname. The accepted parameter names are as follows: GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING params returns a single value, the name of the buffer object currently bound to the binding point corresponding to generic vertex attribute array index. If no buffer object is bound, 0 is returned. The initial value is 0. GL_VERTEX_ATTRIB_ARRAY_ENABLED params returns a single value that is non−zero (true) if the vertex attribute array for index is enabled and 0 (false) if it is disabled. The initial value is GL_FALSE. GL_VERTEX_ATTRIB_ARRAY_SIZE params returns a single value, the size of the vertex attribute array for index. The size is the number of values for each element of the vertex attribute array, and it will be 1, 2, 3, or 4. The initial value is 4. GL_VERTEX_ATTRIB_ARRAY_STRIDE params returns a single value, the array stride for (number of bytes between successive elements in) the vertex attribute array for index. A value of 0 indicates that the array elements are stored sequentially in memory. The initial value is 0. GL_VERTEX_ATTRIB_ARRAY_TYPE params returns a single value, a symbolic constant indicating the array type for the vertex attribute array for index. Possible values are GL_BYTE, GL_UNSIGNED_BYTE, GL_SHORT, GL_UNSIGNED_SHORT, GL_INT, GL_UNSIGNED_INT, GL_FLOAT, and GL_DOUBLE. The initial value is GL_FLOAT. GL_VERTEX_ATTRIB_ARRAY_NORMALIZED params returns a single value that is non−zero (true) if fixed−point data types for the vertex attribute array indicated by index are normalized when they are converted to floating point, and 0 (false) otherwise. The initial value is GL_FALSE. GL_VERTEX_ATTRIB_ARRAY_INTEGER params returns a single value that is non−zero (true) if fixed−point data types for the vertex attribute array indicated by index have integer data types, and 0 (false) otherwise. The initial value is 0 (GL_FALSE). GL_VERTEX_ATTRIB_ARRAY_DIVISOR params returns a single value that is the frequency divisor used for instanced rendering. See glVertexAttribDivisor(). The initial value is 0. GL_CURRENT_VERTEX_ATTRIB params returns four values that represent the current value for the generic vertex attribute specified by index. Generic vertex attribute 0 is unique in that it has no current state, so an error will be generated if index is 0. The initial value for all other generic vertex attributes is (0,0,0,1). glGetVertexAttribdv and glGetVertexAttribfv return the current attribute values as four single−precision floating−point values; glGetVertexAttribiv reads them as floating−point values and converts them to four integer values; glGetVertexAttribIiv and glGetVertexAttribIuiv read and return them as signed or unsigned integer values, respectively; glGetVertexAttribLdv reads and returns them as four double−precision floating−point values. All of the parameters except GL_CURRENT_VERTEX_ATTRIB represent state stored in the currently bound vertex array object.
NOTESIf an error is generated, no change is made to the contents of params.
ERRORSGL_INVALID_OPERATION is generated if pname is not GL_CURRENT_VERTEX_ATTRIB and there is no currently bound vertex array object. GL_INVALID_VALUE is generated if index is greater than or equal to GL_MAX_VERTEX_ATTRIBS. GL_INVALID_ENUM is generated if pname is not an accepted value. GL_INVALID_OPERATION is generated if index is 0 and pname is GL_CURRENT_VERTEX_ATTRIB.
ASSOCIATED GETSglGet() with argument GL_MAX_VERTEX_ATTRIBS glGetVertexAttribPointerv() with arguments index and GL_VERTEX_ATTRIB_ARRAY_POINTER
VERSION SUPPORT OpenGL Version Function / Feature Name 2.0 none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'> 2.1 3.0 3.1 3.2 3.3 4.0 4.1 4.2 4.3 4.4 4.5 glGetVertexAttribIiv − − ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ glGetVertexAttribIuiv − − ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ glGetVertexAttribLdv − − − − − − − ✔ ✔ ✔ ✔ ✔ glGetVertexAttribdv ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ glGetVertexAttribfv ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ glGetVertexAttribiv ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔
SEE ALSOglBindAttribLocation(), glBindBuffer(), glDisableVertexAttribArray, glEnableVertexAttribArray(), glVertexAttrib(), glVertexAttribDivisor(), glVertexAttribPointer()
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