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#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
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