76 lines
1.9 KiB
C++
76 lines
1.9 KiB
C++
/**
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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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* @file nurbsBasisVector.h
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* @author drose
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* @date 2002-12-03
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*/
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#ifndef NURBSBASISVECTOR_H
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#define NURBSBASISVECTOR_H
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#include "pandabase.h"
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#include "luse.h"
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#include "epvector.h"
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#include "pmap.h"
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class NurbsVertex;
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/**
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* This encapsulates a series of matrices that are used to represent the
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* sequential segments of a NurbsCurveEvaluator.
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*
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* This is not related to NurbsCurve, CubicCurveseg or any of the
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* ParametricCurve-derived objects in this module. It is a completely
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* parallel implementation of NURBS curves, and will probably eventually
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* replace the whole ParametricCurve class hierarchy.
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*/
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class EXPCL_PANDA_PARAMETRICS NurbsBasisVector {
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public:
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INLINE NurbsBasisVector();
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INLINE ~NurbsBasisVector();
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INLINE int get_order() const;
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INLINE int get_num_segments() const;
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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 int get_vertex_index(int segment) const;
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INLINE PN_stdfloat get_from(int segment) const;
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INLINE PN_stdfloat get_to(int segment) const;
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INLINE const LMatrix4 &get_basis(int segment) const;
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INLINE PN_stdfloat scale_t(int segment, PN_stdfloat t) const;
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void clear(int order);
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void append_segment(int vertex_index, const PN_stdfloat knots[]);
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void transpose();
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private:
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static LVecBase4 nurbs_blending_function(int order, int i, int j,
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const PN_stdfloat knots[]);
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private:
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int _order;
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class Segment {
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public:
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int _vertex_index;
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PN_stdfloat _from;
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PN_stdfloat _to;
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LMatrix4 _basis;
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};
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typedef epvector<Segment> Segments;
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Segments _segments;
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};
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#include "nurbsBasisVector.I"
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#endif
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