glUniform4f Function

GL_APICALL void GL_APIENTRY glUniform4f(
     GLint location,
     GLfloat x,
     GLfloat y,
     GLfloat z,
     GLfloat w
);

	Name	Description
in	location	Location of uniform variable
in	x	Value to set for the first component
in	y	Value to set for the second component
in	z	Value to set for the third component
in	w	Value to set for the fourth component

No values are returned.

Sets the value of a GL_FLOAT_VEC4-type uniform variable, or a single element of a GL_FLOAT_VEC4-type uniform variable array, in the vertex shader, geometry shader, or reserved fragment shader.

Set location to the uniform variable's location. Use x, y, z, and w to specify the values to set.

Calls to this function are ignored when location is -1.

This function generates the following errors.

GL_INVALID_OPERATION	The location argument is not a location in the current program.
GL_INVALID_OPERATION	There is no current program object.
GL_INVALID_OPERATION	This function was called on a location with a different data type or component count.
GL_INVALID_OPERATION	The uniform variable array is smaller than the offset added to the location obtained from glGetUniformLocation.

2010/01/07

Initial version.