GL_OES_single_precision http://www.opengl.org/registry/specs/OES/OES_single_precision.txt GL_OES_single_precision void glClearDepthfOES (GLclampd depth) void glClipPlanefOES (GLenum plane, const GLfloat* equation) void glDepthRangefOES (GLclampf n, GLclampf f) void glFrustumfOES (GLfloat l, GLfloat r, GLfloat b, GLfloat t, GLfloat n, GLfloat f) void glGetClipPlanefOES (GLenum plane, GLfloat* equation) void glOrthofOES (GLfloat l, GLfloat r, GLfloat b, GLfloat t, GLfloat n, GLfloat f)