1 files changed, 62 insertions, 0 deletions
diff --git a/Runtime/Filters/Misc/TrailRenderer.h b/Runtime/Filters/Misc/TrailRenderer.h
new file mode 100644
index 0000000..4535d64
--- /dev/null
+++ b/Runtime/Filters/Misc/TrailRenderer.h
@@ -0,0 +1,62 @@
+#ifndef TRAILRENDERER_H
+#define TRAILRENDERER_H
+
+#include <list>
+#include "Runtime/Filters/Renderer.h"
+#include "Runtime/Math/Gradient.h"
+#include "Runtime/Math/Vector3.h"
+#include "LineBuilder.h"
+#include "Runtime/Geometry/AABB.h"
+
+
+
+// Renders a trail after an object.
+// This is good for smoke trails after missiles or a visual FX after strong lights.
+// @todo make it work so we track movement over a Cameras screen space.
+class TrailRenderer : public Renderer {
+public:
+	REGISTER_DERIVED_CLASS (TrailRenderer, Renderer)
+	DECLARE_OBJECT_SERIALIZE (TrailRenderer)
+
+	TrailRenderer (MemLabelId label, ObjectCreationMode mode);
+
+	virtual void Reset ();
+
+	virtual void Render (int materialIndex, const ChannelAssigns& channels);
+
+	// Hook up to TransformChanged
+	static void InitializeClass ();
+	
+	// TransformChanged message handler
+	void TransformChanged (int changeMask);
+	
+	virtual void UpdateTransformInfo();
+	
+	GET_SET_DIRTY(float, Time, m_Time)
+	GET_SET_DIRTY(float, MinVertexDistance, m_MinVertexDistance)
+	GET_SET_DIRTY(float, StartWidth, m_LineParameters.startWidth)
+	GET_SET_DIRTY(float, EndWidth, m_LineParameters.endWidth)
+	GET_SET_DIRTY(bool, Autodestruct, m_Autodestruct)
+
+protected:
+	// from Renderer
+	virtual void UpdateRenderer();
+	
+private:
+	float GetHalfMaxLineWidth () const;
+
+	bool				m_TransformChanged;				// Has the transform changed since last render?
+	bool				m_WasRendered;					// Trail was rendered so enable autodestruct
+	std::list<Vector3f>	m_Positions;					// The positions for each of the centers
+	std::list<float>	m_TimeStamps;					// The timestamp for each position
+	int					m_CurrentLength;				// The current length in vertices
+	MinMaxAABB			m_AABB;							// The size in world coords
+
+	GradientDeprecated<k3DLineGradientSize> m_Colors;
+	LineParameters		m_LineParameters;
+	float				m_Time;							///< How long the tail should be (seconds). { 0, infinity}
+	float				m_MinVertexDistance;			///< The minimum distance to spawn a new point on the trail range { 0, infinity}
+	bool				m_Autodestruct;					///< Destroy GameObject when there is no trail?
+};
+
+#endif