102 lines
3.6 KiB
C++
102 lines
3.6 KiB
C++
// Filename: nurbsSurfaceResult.h
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// Created by: drose (10Oct03)
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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 NURBSSURFACERESULT_H
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#define NURBSSURFACERESULT_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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class NurbsVertex;
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////////////////////////////////////////////////////////////////////
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// Class : NurbsSurfaceResult
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// Description : The result of a NurbsSurfaceEvaluator. This object
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// represents a surface in a particular coordinate space.
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// It can return the point and/or normal to the surface
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// at any point.
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////////////////////////////////////////////////////////////////////
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class EXPCL_PANDA_PARAMETRICS NurbsSurfaceResult : public ReferenceCount {
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public:
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NurbsSurfaceResult(const NurbsBasisVector &u_basis,
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const NurbsBasisVector &v_basis,
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const LVecBase4 vecs[], const NurbsVertex *verts,
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int num_u_vertices, int num_v_vertices);
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PUBLISHED:
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INLINE ~NurbsSurfaceResult();
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INLINE PN_stdfloat get_start_u() const;
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INLINE PN_stdfloat get_end_u() const;
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INLINE PN_stdfloat get_start_v() const;
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INLINE PN_stdfloat get_end_v() const;
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INLINE bool eval_point(PN_stdfloat u, PN_stdfloat v, LVecBase3 &point);
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INLINE bool eval_normal(PN_stdfloat u, PN_stdfloat v, LVecBase3 &normal);
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INLINE PN_stdfloat eval_extended_point(PN_stdfloat u, PN_stdfloat v, int d);
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INLINE bool eval_extended_points(PN_stdfloat u, PN_stdfloat v, int d,
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PN_stdfloat result[], int num_values);
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INLINE int get_num_u_segments() const;
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INLINE int get_num_v_segments() const;
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void eval_segment_point(int ui, int vi, PN_stdfloat u, PN_stdfloat v, LVecBase3 &point) const;
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void eval_segment_normal(int ui, int vi, PN_stdfloat u, PN_stdfloat v, LVecBase3 &normal) const;
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PN_stdfloat eval_segment_extended_point(int ui, int vi, PN_stdfloat u, PN_stdfloat v, int d) const;
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void eval_segment_extended_points(int ui, int vi, PN_stdfloat u, PN_stdfloat v, int d,
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PN_stdfloat result[], int num_values) const;
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INLINE PN_stdfloat get_segment_u(int ui, PN_stdfloat u) const;
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INLINE PN_stdfloat get_segment_v(int vi, PN_stdfloat v) const;
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private:
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INLINE int verti(int ui, int vi) const;
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INLINE int segi(int ui, int vi) const;
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int find_u_segment(PN_stdfloat u);
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int r_find_u_segment(PN_stdfloat u, int top, int bot) const;
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int find_v_segment(PN_stdfloat v);
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int r_find_v_segment(PN_stdfloat v, int top, int bot) const;
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NurbsBasisVector _u_basis;
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NurbsBasisVector _v_basis;
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const NurbsVertex *_verts;
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int _num_u_vertices;
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int _num_v_vertices;
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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 u_basis._segments *
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// v_basis._segments.
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class ComposedMats {
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public:
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LMatrix4 _x, _y, _z, _w;
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};
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typedef epvector<ComposedMats> ComposedGeom;
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ComposedGeom _composed;
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int _last_u_segment;
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PN_stdfloat _last_u_from;
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PN_stdfloat _last_u_to;
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int _last_v_segment;
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PN_stdfloat _last_v_from;
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PN_stdfloat _last_v_to;
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};
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#include "nurbsSurfaceResult.I"
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#endif
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