Render primitives from array data.
||-||Specifies what kind of primitives to render. Symbolic constants |
||-||Specifies the minimum array index contained in |
||-||Specifies the maximum array index contained in |
||-||Specifies the number of elements to be rendered.|
||-||Specifies the type of the values in |
||-||Specifies a pointer to the location where the indices are stored.|
glDrawRangeElements is a restricted form of glDrawElements .
mode , and
count match the corresponding arguments to glDrawElements , with the additional constraint that all values in the arrays
count must lie between
end , inclusive.
Implementations denote recommended maximum amounts of vertex and index data, which may be queried by calling glGet with argument
GL_MAX_ELEMENTS_INDICES . If [math]end-start+1[/math] is greater than the value of
GL_MAX_ELEMENTS_VERTICES , or if
count is greater than the value of
GL_MAX_ELEMENTS_INDICES , then the call may operate at reduced performance. There is no requirement that all vertices in the range [math][/math] be referenced. However, the implementation may partially process unused vertices, reducing performance from what could be achieved with an optimal index set.
glDrawRangeElements is called, it uses
count sequential elements from an enabled array, starting at
start to construct a sequence of geometric 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.
Vertex attributes that are modified by
glDrawRangeElements have an unspecified value after
glDrawRangeElements returns. Attributes that aren't modified maintain their previous values.
GL_TRIANGLES_ADJACENCY are available only if the GL version is 3.2 or greater.
It is an error for indices to lie outside the range [math][/math] , but implementations may not check for this situation. Such indices cause implementation-dependent behavior.
GL_INVALID_ENUM is generated if
mode is not an accepted value.
GL_INVALID_VALUE is generated if
count is negative.
GL_INVALID_VALUE is generated if [math]end\lt start[/math] .
GL_INVALID_OPERATION is generated if a geometry shader is active and
mode is incompatible with the input primitive type of the geometry shader in the currently installed program object.
GL_INVALID_OPERATION is generated if a non-zero buffer object name is bound to an enabled array or the element array and the buffer object's data store is currently mapped.
glGet with argument
glGet with argument
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