107 lines
3.9 KiB
C++
107 lines
3.9 KiB
C++
// Filename: nurbsCurveResult.h
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// Created by: drose (03Dec02)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) Carnegie Mellon University. All rights reserved.
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//
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// All use of this software is subject to the terms of the revised BSD
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// license. You should have received a copy of this license along
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// with this source code in a file named "LICENSE."
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//
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////////////////////////////////////////////////////////////////////
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#ifndef NURBSCURVERESULT_H
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#define NURBSCURVERESULT_H
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#include "pandabase.h"
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#include "referenceCount.h"
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#include "nurbsBasisVector.h"
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#include "vector_stdfloat.h"
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class NurbsVertex;
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////////////////////////////////////////////////////////////////////
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// Class : NurbsCurveResult
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// Description : The result of a NurbsCurveEvaluator. This object
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// represents a curve in a particular coordinate space.
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// It can return the point and/or tangent to the curve
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// at any point.
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//
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// This is not related to NurbsCurve, CubicCurveseg or
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// any of the ParametricCurve-derived objects in this
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// module. It is a completely parallel implementation
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// of NURBS curves, and will probably eventually replace
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// the whole ParametricCurve class hierarchy.
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////////////////////////////////////////////////////////////////////
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class EXPCL_PANDA_PARAMETRICS NurbsCurveResult : public ReferenceCount {
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public:
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NurbsCurveResult(const NurbsBasisVector &basis,
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const LVecBase4 vecs[], const NurbsVertex *verts,
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int num_vertices);
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PUBLISHED:
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INLINE ~NurbsCurveResult();
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INLINE PN_stdfloat get_start_t() const;
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INLINE PN_stdfloat get_end_t() const;
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INLINE bool eval_point(PN_stdfloat t, LVecBase3 &point);
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INLINE bool eval_tangent(PN_stdfloat t, LVecBase3 &tangent);
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INLINE PN_stdfloat eval_extended_point(PN_stdfloat t, int d);
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INLINE bool eval_extended_points(PN_stdfloat t, int d,
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PN_stdfloat result[], int num_values);
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INLINE int get_num_segments() const;
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void eval_segment_point(int segment, PN_stdfloat t, LVecBase3 &point) const;
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void eval_segment_tangent(int segment, PN_stdfloat t, LVecBase3 &tangent) const;
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PN_stdfloat eval_segment_extended_point(int segment, PN_stdfloat t, int d) const;
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void eval_segment_extended_points(int segment, PN_stdfloat t, int d,
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PN_stdfloat result[], int num_values) const;
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INLINE PN_stdfloat get_segment_t(int segment, PN_stdfloat t) const;
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void adaptive_sample(PN_stdfloat tolerance);
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INLINE int get_num_samples() const;
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INLINE PN_stdfloat get_sample_t(int n) const;
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INLINE const LPoint3 &get_sample_point(int n) const;
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MAKE_SEQ(get_sample_ts, get_num_samples, get_sample_t);
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MAKE_SEQ(get_sample_points, get_num_samples, get_sample_points);
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private:
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int find_segment(PN_stdfloat t);
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int r_find_segment(PN_stdfloat t, int top, int bot) const;
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void r_adaptive_sample(int segment, PN_stdfloat t0, const LPoint3 &p0,
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PN_stdfloat t1, const LPoint3 &p1, PN_stdfloat tolerance_2);
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static PN_stdfloat sqr_dist_to_line(const LPoint3 &point, const LPoint3 &origin,
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const LVector3 &vec);
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NurbsBasisVector _basis;
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const NurbsVertex *_verts;
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// We pre-compose the basis matrix and the geometry vectors, so we
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// have these handy for evaluation. There is one entry in the
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// _composed for each entry in basis._segments.
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typedef epvector<LMatrix4> ComposedGeom;
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ComposedGeom _composed;
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int _last_segment;
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PN_stdfloat _last_from;
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PN_stdfloat _last_to;
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class AdaptiveSample {
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public:
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INLINE AdaptiveSample(PN_stdfloat t, const LPoint3 &point);
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PN_stdfloat _t;
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LPoint3 _point;
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};
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typedef pvector<AdaptiveSample> AdaptiveResult;
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AdaptiveResult _adaptive_result;
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};
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#include "nurbsCurveResult.I"
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#endif
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