GRAPHICS: Add Renderable::getSize()

xoreos · Feb 4, 2014 · bdf751f · bdf751f
1 parent 13e222c
commit bdf751f
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Showing 2 changed files with 32 additions and 0 deletions.
diff --git a/src/graphics/renderable.cpp b/src/graphics/renderable.cpp
@@ -168,6 +168,33 @@ void Renderable::setBaseScale(float x, float y, float z) {
 	setScale(1.0, 1.0, 1.0);
 }
 
+void Renderable::addBoundBox(Ogre::AxisAlignedBox &bound, const Ogre::SceneNode &node) {
+	// Move all attached visible objects into the bounding box
+	for (Ogre::SceneNode::ConstObjectIterator o = node.getAttachedObjectIterator(); o.hasMoreElements(); o.moveNext())
+		bound.merge(o.current()->second->getWorldBoundingBox(true));
+
+	// Recurse into the child nodes
+	for (Ogre::Node::ConstChildNodeIterator c = node.getChildIterator(); c.hasMoreElements(); c.moveNext())
+		addBoundBox(bound, *((Ogre::SceneNode *) c.current()->second));
+}
+
+void Renderable::getSize(float &width, float &height, float &depth) const {
+	if (!_rootNode) {
+		width = height = depth = 0.0;
+		return;
+	}
+
+	Ogre::AxisAlignedBox bound;
+	addBoundBox(bound, *_rootNode);
+
+	const Ogre::Vector3 &min = bound.getMinimum();
+	const Ogre::Vector3 &max = bound.getMaximum();
+
+	width  = ABS(max[0] - min[0]);
+	height = ABS(max[1] - min[1]);
+	depth  = ABS(max[2] - min[2]);
+}
+
 void Renderable::getPosition(float &x, float &y, float &z) const {
 	const Ogre::Vector3 &p = _rootNode->getPosition();
 

diff --git a/src/graphics/renderable.h b/src/graphics/renderable.h
@@ -72,6 +72,9 @@ class Renderable {
 	/** Set the base scale. All scaling will be done relative to the base scale. */
 	void setBaseScale(float x, float y, float z);
 
+	/** Get the size of the renderable. */
+	void getSize(float &width, float &height, float &depth) const;
+
 	/** Get the current position of the renderable. */
 	virtual void getPosition(float &x, float &y, float &z) const;
 	/** Get the current orientation of the renderable. */
@@ -127,6 +130,8 @@ class Renderable {
 
 private:
 	void destroy();
+
+	static void addBoundBox(Ogre::AxisAlignedBox &bound, const Ogre::SceneNode &node);
 };
 
 } // End of namespace Graphics