1 files changed, 107 insertions, 0 deletions
diff --git a/public/movieobjects/dmedag.h b/public/movieobjects/dmedag.h
new file mode 100644
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+++ b/public/movieobjects/dmedag.h
@@ -0,0 +1,107 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// A class representing a Dag (directed acyclic graph) node used for holding transforms, lights, cameras and shapes
+//
+//=============================================================================
+
+#ifndef DMEDAG_H
+#define DMEDAG_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "tier1/utlstack.h"
+#include "datamodel/dmelement.h"
+#include "datamodel/dmattribute.h"
+#include "datamodel/dmattributevar.h"
+#include "movieobjects/dmeshape.h"
+#include "movieobjects/dmetransform.h"
+
+
+//-----------------------------------------------------------------------------
+// Forward declarations
+//-----------------------------------------------------------------------------
+class CDmeTransform;
+class CDmeShape;
+class CDmeDrawSettings;
+
+
+//-----------------------------------------------------------------------------
+// A class representing a camera
+//-----------------------------------------------------------------------------
+class CDmeDag : public CDmElement
+{
+	DEFINE_ELEMENT( CDmeDag, CDmElement );
+
+public:
+	// Accessors
+	CDmeTransform *GetTransform();
+	CDmeShape *GetShape();
+
+	// Changes the shage
+	void SetShape( CDmeShape *pShape );
+
+	bool IsVisible() const;
+	void SetVisible( bool bVisible = true );
+
+	// child helpers
+	const CUtlVector< DmElementHandle_t > &GetChildren() const;
+	int GetChildCount() const;
+	CDmeDag *GetChild( int i ) const;
+	void AddChild( CDmeDag* pDag );
+	void RemoveChild( int i );
+	void RemoveChild( const CDmeDag *pChild, bool bRecurse = false );
+	int FindChild( const CDmeDag *pChild ) const;
+	int FindChild( CDmeDag *&pParent, const CDmeDag *pChild );
+	int FindChild( const char *name ) const;
+	CDmeDag *FindOrAddChild( const char *name );
+
+	// Recursively render the Dag hierarchy
+	virtual void Draw( CDmeDrawSettings *pDrawSettings = NULL );
+	void GetBoundingSphere( Vector &center, float &radius ) const
+	{
+		matrix3x4_t identity;
+		SetIdentityMatrix( identity );
+		GetBoundingSphere( center, radius, identity );
+	}
+
+	void GetShapeToWorldTransform( matrix3x4_t &mat );
+
+	void GetLocalMatrix( matrix3x4_t &mat );
+
+	void GetWorldMatrix( matrix3x4_t &mat );
+
+	void GetParentWorldMatrix( matrix3x4_t &mat );
+
+	static void DrawUsingEngineCoordinates( bool bEnable );
+
+	// Transform from DME to engine coordinates
+	static void DmeToEngineMatrix( matrix3x4_t& dmeToEngine );
+	static void EngineToDmeMatrix( matrix3x4_t& engineToDme );
+
+protected:
+	void GetBoundingSphere( Vector &center, float &radius, const matrix3x4_t &pMat ) const;
+
+	void PushDagTransform();
+	void PopDagTransform();
+	CDmAttribute *GetVisibilityAttribute();
+
+	CDmaVar< bool >					m_Visible;
+	CDmaElement< CDmeTransform >	m_Transform;
+	CDmaElement< CDmeShape >		m_Shape;
+	CDmaElementArray< CDmeDag >		m_Children;
+
+private:
+	struct TransformInfo_t
+	{
+		CDmeTransform *m_pTransform;
+		matrix3x4_t	m_DagToWorld;
+		bool m_bComputedDagToWorld;
+	};
+	
+	static CUtlStack<TransformInfo_t> s_TransformStack;
+	static bool s_bDrawUsingEngineCoordinates;
+};
+
+
+#endif // DMEDAG_H