code: function loadUniformsMatrices ( uniforms, object ) {
  
  		_gl.uniformMatrix4fv( uniforms.modelViewMatrix, false, object._modelViewMatrix.elements );
  
  		if ( uniforms.normalMatrix ) {
  
  			_gl.uniformMatrix3fv( uniforms.normalMatrix, false, object._normalMatrix.elements );
  
  		}
  
  	}
docs: Uniforms (load to GPU)