New method for camera scene nodes. updateMatrices updates the camera matrices...

New method for camera scene nodes. updateMatrices updates the camera matrices without uploading them to the driver directly. Patch submitted by hendu

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4475 dfc29bdd-3216-0410-991c-e03cc46cb475

include/ICameraSceneNode.h

@@ -165,6 +165,9 @@ namespace scene
 		@see getTargetAndRotationBinding() */
 		virtual void bindTargetAndRotation(bool bound) =0;
 
+		//! Updates the matrices without uploading them to the driver
+		virtual void updateMatrices() = 0;
+
 		//! Queries if the camera scene node's rotation and its target position are bound together.
 		/** @see bindTargetAndRotation() */
 		virtual bool getTargetAndRotationBinding(void) const =0;

source/Irrlicht/CCameraSceneNode.cpp

@@ -243,6 +243,19 @@ void CCameraSceneNode::OnRegisterSceneNode()
 
 //! render
 void CCameraSceneNode::render()
+{
+	updateMatrices();
+
+	video::IVideoDriver* driver = SceneManager->getVideoDriver();
+	if ( driver)
+	{
+		driver->setTransform(video::ETS_PROJECTION, ViewArea.getTransform ( video::ETS_PROJECTION) );
+		driver->setTransform(video::ETS_VIEW, ViewArea.getTransform ( video::ETS_VIEW) );
+	}
+}
+
+//! update
+void CCameraSceneNode::updateMatrices()
 {
 	core::vector3df pos = getAbsolutePosition();
 	core::vector3df tgtv = Target - pos;
@@ -263,16 +276,8 @@ void CCameraSceneNode::render()
 	ViewArea.getTransform(video::ETS_VIEW).buildCameraLookAtMatrixLH(pos, Target, up);
 	ViewArea.getTransform(video::ETS_VIEW) *= Affector;
 	recalculateViewArea();
-
-	video::IVideoDriver* driver = SceneManager->getVideoDriver();
-	if ( driver)
-	{
-		driver->setTransform(video::ETS_PROJECTION, ViewArea.getTransform ( video::ETS_PROJECTION) );
-		driver->setTransform(video::ETS_VIEW, ViewArea.getTransform ( video::ETS_VIEW) );
-	}
 }
 
-
 //! returns the axis aligned bounding box of this node
 const core::aabbox3d<f32>& CCameraSceneNode::getBoundingBox() const
 {

source/Irrlicht/CCameraSceneNode.h

@@ -113,6 +113,9 @@ namespace scene
 		//! Render
 		virtual void render();
 
+		//! Update
+		virtual void updateMatrices();
+
 		//! Returns the axis aligned bounding box of this node
 		virtual const core::aabbox3d<f32>& getBoundingBox() const;