Hey ive been trying to fingure out what (GLfloat) does in this code?

GLvoid ResizeGLScene(GLsizei width, GLsizei height)
{
	if (height==0)
	{
		height=1;
	}

	glViewport(0,0,width,height);

	glMatrixMode(GL_Projection);
	glLoadIdentity();

	gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);//THIS LINE!!!


	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();

}

THANKS!

It prevents truncation due to integer division.

Yep, thats a c-style static cast, meaning that it tells the compiler to treat it as a GLfloat