GL_NV_half_float
http://oss.sgi.com/projects/ogl-sample/registry/NV/half_float.txt
	GL_HALF_FLOAT_NV 0x140B
	void glColor3hNV (GLhalf red, GLhalf green, GLhalf blue)
	void glColor3hvNV (const GLhalf* v)
	void glColor4hNV (GLhalf red, GLhalf green, GLhalf blue, GLhalf alpha)
	void glColor4hvNV (const GLhalf* v)
	void glFogCoordhNV (GLhalf fog)
	void glFogCoordhvNV (const GLhalf* fog)
	void glMultiTexCoord1hNV (GLenum target, GLhalf s)
	void glMultiTexCoord1hvNV (GLenum target, const GLhalf* v)
	void glMultiTexCoord2hNV (GLenum target, GLhalf s, GLhalf t)
	void glMultiTexCoord2hvNV (GLenum target, const GLhalf* v)
	void glMultiTexCoord3hNV (GLenum target, GLhalf s, GLhalf t, GLhalf r)
	void glMultiTexCoord3hvNV (GLenum target, const GLhalf* v)
	void glMultiTexCoord4hNV (GLenum target, GLhalf s, GLhalf t, GLhalf r, GLhalf q)
	void glMultiTexCoord4hvNV (GLenum target, const GLhalf* v)
	void glNormal3hNV (GLhalf nx, GLhalf ny, GLhalf nz)
	void glNormal3hvNV (const GLhalf* v)
	void glSecondaryColor3hNV (GLhalf red, GLhalf green, GLhalf blue)
	void glSecondaryColor3hvNV (const GLhalf* v)
	void glTexCoord1hNV (GLhalf s)
	void glTexCoord1hvNV (const GLhalf* v)
	void glTexCoord2hNV (GLhalf s, GLhalf t)
	void glTexCoord2hvNV (const GLhalf* v)
	void glTexCoord3hNV (GLhalf s, GLhalf t, GLhalf r)
	void glTexCoord3hvNV (const GLhalf* v)
	void glTexCoord4hNV (GLhalf s, GLhalf t, GLhalf r, GLhalf q)
	void glTexCoord4hvNV (const GLhalf* v)
	void glVertex2hNV (GLhalf x, GLhalf y)
	void glVertex2hvNV (const GLhalf* v)
	void glVertex3hNV (GLhalf x, GLhalf y, GLhalf z)
	void glVertex3hvNV (const GLhalf* v)
	void glVertex4hNV (GLhalf x, GLhalf y, GLhalf z, GLhalf w)
	void glVertex4hvNV (const GLhalf* v)
	void glVertexAttrib1hNV (GLuint index, GLhalf x)
	void glVertexAttrib1hvNV (GLuint index, const GLhalf* v)
	void glVertexAttrib2hNV (GLuint index, GLhalf x, GLhalf y)
	void glVertexAttrib2hvNV (GLuint index, const GLhalf* v)
	void glVertexAttrib3hNV (GLuint index, GLhalf x, GLhalf y, GLhalf z)
	void glVertexAttrib3hvNV (GLuint index, const GLhalf* v)
	void glVertexAttrib4hNV (GLuint index, GLhalf x, GLhalf y, GLhalf z, GLhalf w)
	void glVertexAttrib4hvNV (GLuint index, const GLhalf* v)
	void glVertexAttribs1hvNV (GLuint index, GLsizei n, const GLhalf* v)
	void glVertexAttribs2hvNV (GLuint index, GLsizei n, const GLhalf* v)
	void glVertexAttribs3hvNV (GLuint index, GLsizei n, const GLhalf* v)
	void glVertexAttribs4hvNV (GLuint index, GLsizei n, const GLhalf* v)
	void glVertexWeighthNV (GLhalf weight)
	void glVertexWeighthvNV (const GLhalf* weight)
	typedef unsigned short GLhalf