WebGLShadowMap: fix order of matrix calculations

src/renderers/webgl/WebGLShadowMap.js

@@ -137,6 +137,9 @@ function WebGLShadowMap( _renderer, _lights, _objects, capabilities ) {
 			var shadowCamera = shadow.camera;
 			var shadowMatrix = shadow.matrix;
 
+			_lightPositionWorld.setFromMatrixPosition( light.matrixWorld );
+			shadowCamera.position.copy( _lightPositionWorld );
+
 			_shadowMapSize.copy( shadow.mapSize );
 			_shadowMapSize.min( _maxShadowMapSize );
 
@@ -181,14 +184,17 @@ function WebGLShadowMap( _renderer, _lights, _objects, capabilities ) {
 				// for point lights we set the shadow matrix to be a translation-only matrix
 				// equal to inverse of the light's position
 
-				var elements = light.matrixWorld.elements;
-				shadowMatrix.makeTranslation( - elements[ 12 ], - elements[ 13 ], - elements[ 14 ] );
+				shadowMatrix.makeTranslation( - _lightPositionWorld.x, - _lightPositionWorld.y, - _lightPositionWorld.z );
 
 			} else {
 
 				faceCount = 1;
 				isPointLight = false;
 
+				_lookTarget.setFromMatrixPosition( light.target.matrixWorld );
+				shadowCamera.lookAt( _lookTarget );
+				shadowCamera.updateMatrixWorld();
+				shadowCamera.matrixWorldInverse.getInverse( shadowCamera.matrixWorld );
 
 				// compute shadow matrix
 
@@ -223,9 +229,6 @@ function WebGLShadowMap( _renderer, _lights, _objects, capabilities ) {
 
 			var shadowMap = shadow.map;
 
-			_lightPositionWorld.setFromMatrixPosition( light.matrixWorld );
-			shadowCamera.position.copy( _lightPositionWorld );
-
 			_renderer.setRenderTarget( shadowMap );
 			_renderer.clear();
 
@@ -240,20 +243,14 @@ function WebGLShadowMap( _renderer, _lights, _objects, capabilities ) {
 					_lookTarget.add( cubeDirections[ face ] );
 					shadowCamera.up.copy( cubeUps[ face ] );
 					shadowCamera.lookAt( _lookTarget );
+					shadowCamera.updateMatrixWorld();
+					shadowCamera.matrixWorldInverse.getInverse( shadowCamera.matrixWorld );
 
 					var vpDimensions = cube2DViewPorts[ face ];
 					_state.viewport( vpDimensions );
 
-				} else {
-
-					_lookTarget.setFromMatrixPosition( light.target.matrixWorld );
-					shadowCamera.lookAt( _lookTarget );
-
 				}
 
-				shadowCamera.updateMatrixWorld();
-				shadowCamera.matrixWorldInverse.getInverse( shadowCamera.matrixWorld );
-
 				// update camera matrices and frustum
 
 				_projScreenMatrix.multiplyMatrices( shadowCamera.projectionMatrix, shadowCamera.matrixWorldInverse );