/usr/include/libwildmagic/Wm5CurveMesh.h is in libwildmagic-dev 5.13-1+b2.
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// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.0.1 (2010/10/01)
#ifndef WM5CURVEMESH_H
#define WM5CURVEMESH_H
#include "Wm5GraphicsLIB.h"
#include "Wm5Polysegment.h"
#include "Wm5CurveSegment.h"
#include "Wm5FloatArray.h"
namespace Wm5
{
class WM5_GRAPHICS_ITEM CurveMesh : public Polysegment
{
WM5_DECLARE_RTTI;
WM5_DECLARE_NAMES;
WM5_DECLARE_STREAM(CurveMesh);
public:
// Construction and destruction. The input 'vbuffer' has N >= 2 vertices
// which are assumed to be ordered to form a continuous curve of N-1
// curve segments. The curve segments are stored in 'segments', an
// array with N-1 elements. CurveMesh assumes responsibility for deleting
// this array, so it must be dynamically allocated. The array 'params'
// stores the parameter values for the curve segment endpoints. This
// array must have 2*(N-1) values. Curve segment P[i] has domain
// [params[2*i],params[2*i+1]]. Continuity requires that
// P[i](params[2*i+1]) = P[i+1](params[2*(i+1)]). The polysegment
// produced by the subdivision is flagged as open. If you want a closed
// polysegment, you should make certain that the first endpoint of
// P[0] matches the last endpoint of P[N-1].
//
// The parameter 'allowDynamicChange' should be set to 'true' when you
// plan to dynamically modify the curve segments. For example, you might
// modify the control points in a Bezier curve segment.
CurveMesh (VertexFormat* vformat, VertexBuffer* vbuffer,
CurveSegmentPtr* segments, FloatArray* params,
bool allowDynamicChange);
virtual ~CurveMesh ();
// Level of subdivision. The 'level' value must be nonnegative.
void SetLevel (int level);
int GetLevel () const;
// Call this function when one or more of your curve segments has
// dynamically changed.
void OnDynamicChange ();
// Free up all memory used by the object, other than the Polysegment data.
// The intent is that the curve mesh is in its final form. Once this
// function is called, SetLevel is ignored.
void Lock ();
bool IsLocked () const;
protected:
VertexBufferPtr mOrigVBuffer;
FloatArrayPtr mOrigParams;
CurveSegmentPtr* mSegments;
int mNumFullVertices, mNumSegments, mLevel;
private:
// Support for subdivision of the mesh.
class Edge
{
public:
Edge ();
// Curve for subdivision evaluations.
CurveSegmentPtr Segment;
// Indices for the vertices.
int V[2];
// Curve parameter values for the endpoints.
float Param[2];
};
void Allocate (int& numTotalVertices, int& numTotalEdges, Edge*& edges);
void Subdivide (int& numVertices, int& numEdges, Edge* edges);
// Support for dynamic changes in the curve segments.
class CurveInfo
{
public:
friend class Memory;
CurveInfo ();
CurveSegmentPtr Segment;
float Param;
};
void InitializeCurveInfo ();
bool mAllowDynamicChange;
CurveInfo* mCInfo;
};
WM5_REGISTER_STREAM(CurveMesh);
typedef Pointer0<CurveMesh> CurveMeshPtr;
}
#endif
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