--- /dev/null
+// Created on: 2014-10-14
+// Created by: Anton POLETAEV
+// Copyright (c) 2013-2014 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
+
+#ifndef _StdPrs_Isolines_H__
+#define _StdPrs_Isolines_H__
+
+#include <BRepAdaptor_HSurface.hxx>
+#include <Geom_Surface.hxx>
+#include <Prs3d_Drawer.hxx>
+#include <Prs3d_Presentation.hxx>
+#include <Prs3d_LineAspect.hxx>
+#include <Prs3d_Root.hxx>
+#include <Prs3d_NListOfSequenceOfPnt.hxx>
+#include <Poly_Triangulation.hxx>
+#include <StdPrs_ToolTriangulatedShape.hxx>
+#include <TColStd_Array1OfInteger.hxx>
+#include <TColgp_Array1OfPnt2d.hxx>
+#include <TColStd_SequenceOfReal.hxx>
+
+class Poly_Triangle;
+class TopoDS_Face;
+class TopLoc_Location;
+
+//! Tool for computing isoline representation for a face or surface.
+//! Depending on a flags set to the given Prs3d_Drawer instance, on-surface (is used
+//! by default) or on-triangulation isoline builder algorithm will be used.
+//! If the given shape is not triangulated, on-surface isoline builder will be applied
+//! regardless of Prs3d_Drawer flags.
+class StdPrs_Isolines : public Prs3d_Root
+{
+public:
+
+ //! Computes isolines presentation for a TopoDS face.
+ //! This method chooses proper version of isoline builder algorithm : on triangulation
+ //! or surface depending on the flag passed from Prs3d_Drawer attributes.
+ //! This method is a default way to display isolines for a given TopoDS face.
+ //! @param thePresentation [in] the presentation.
+ //! @param theFace [in] the face.
+ //! @param theDrawer [in] the display settings.
+ //! @param theDeflection [in] the deflection for isolines-on-surface version.
+ inline static void Add (const Handle(Prs3d_Presentation)& thePresentation,
+ const TopoDS_Face& theFace,
+ const Handle(Prs3d_Drawer)& theDrawer,
+ const Standard_Real theDeflection)
+ {
+ if (theDrawer->IsoOnTriangulation() && StdPrs_ToolTriangulatedShape::IsTriangulated (theFace))
+ {
+ AddOnTriangulation (thePresentation, theFace, theDrawer);
+ }
+ else
+ {
+ AddOnSurface (thePresentation, theFace, theDrawer, theDeflection);
+ }
+ }
+
+ //! Computes isolines on triangulation and adds them to a presentation.
+ //! @param thePresentation [in] the presentation.
+ //! @param theFace [in] the face.
+ //! @param theDrawer [in] the display settings.
+ Standard_EXPORT static void AddOnTriangulation (const Handle(Prs3d_Presentation)& thePresentation,
+ const TopoDS_Face& theFace,
+ const Handle(Prs3d_Drawer)& theDrawer);
+
+ //! Computes isolines on triangulation and adds them to a presentation.
+ //! @param thePresentation [in] the presentation.
+ //! @param theTriangulation [in] the triangulation.
+ //! @param theSurface [in] the definition of triangulated surface. The surface
+ //! adapter is used to precisely evaluate isoline points using surface
+ //! law and fit them on triangulation. If NULL is passed, the method will
+ //! use linear interpolation of triangle node's UV coordinates to evaluate
+ //! isoline points.
+ //! @param theLocation [in] the location transformation defined for triangulation (surface).
+ //! @param theDrawer [in] the display settings.
+ //! @param theUIsoParams [in] the parameters of u isolines to compute.
+ //! @param theVIsoParams [in] the parameters of v isolines to compute.
+ Standard_EXPORT static void AddOnTriangulation (const Handle(Prs3d_Presentation)& thePresentation,
+ const Handle(Poly_Triangulation)& theTriangulation,
+ const Handle(Geom_Surface)& theSurface,
+ const TopLoc_Location& theLocation,
+ const Handle(Prs3d_Drawer)& theDrawer,
+ const TColStd_SequenceOfReal& theUIsoParams,
+ const TColStd_SequenceOfReal& theVIsoParams);
+
+ //! Computes isolines on surface and adds them to presentation.
+ //! @param thePresentation [in] the presentation.
+ //! @param theFace [in] the face.
+ //! @param theDrawer [in] the display settings.
+ //! @param theDeflection [in] the deflection value.
+ Standard_EXPORT static void AddOnSurface (const Handle(Prs3d_Presentation)& thePresentation,
+ const TopoDS_Face& theFace,
+ const Handle(Prs3d_Drawer)& theDrawer,
+ const Standard_Real theDeflection);
+
+ //! Computes isolines on surface and adds them to presentation.
+ //! @param thePresentation [in] the presentation.
+ //! @param theSurface [in] the surface.
+ //! @param theDrawer [in] the display settings.
+ //! @param theDeflection [in] the deflection value.
+ //! @param theUIsoParams [in] the parameters of u isolines to compute.
+ //! @param theVIsoParams [in] the parameters of v isolines to compute.
+ Standard_EXPORT static void AddOnSurface (const Handle(Prs3d_Presentation)& thePresentation,
+ const Handle(BRepAdaptor_HSurface)& theSurface,
+ const Handle(Prs3d_Drawer)& theDrawer,
+ const Standard_Real theDeflection,
+ const TColStd_SequenceOfReal& theUIsoParams,
+ const TColStd_SequenceOfReal& theVIsoParams);
+
+ //! Evalute sequence of parameters for drawing uv isolines for a given face.
+ //! @param theFace [in] the face.
+ //! @param theNbIsoU [in] the number of u isolines.
+ //! @param theNbIsoV [in] the number of v isolines.
+ //! @param theUVLimit [in] the u, v parameter value limit.
+ //! @param theUIsoParams [out] the sequence of u isoline parameters.
+ //! @param theVIsoParams [out] the sequence of v isoline parameters.
+ Standard_EXPORT static void UVIsoParameters (const TopoDS_Face& theFace,
+ const Standard_Integer theNbIsoU,
+ const Standard_Integer theNbIsoV,
+ const Standard_Real theUVLimit,
+ TColStd_SequenceOfReal& theUIsoParams,
+ TColStd_SequenceOfReal& theVIsoParams);
+
+private:
+
+ //! Find isoline segment on a triangle.
+ //! @param theSurface [in] the surface.
+ //! @param theIsoline [in] the isoline in uv coordinates.
+ //! @param theNodesXYZ [in] the XYZ coordinates of triangle nodes.
+ //! @param theNodesUV [in] the UV coordinates of triangle nodes.
+ //! @param theSegment [out] the XYZ points of crossed triangle's links.
+ //! @return TRUE if the isoline passes through the triangle.
+ Standard_EXPORT static Standard_Boolean findSegmentOnTriangulation (const Handle(Geom_Surface)& theSurface,
+ const gp_Lin2d& theIsoline,
+ const gp_Pnt* theNodesXYZ,
+ const gp_Pnt2d* theNodesUV,
+ gp_Pnt* theSegment);
+};
+
+#endif // _StdPrs_Isolines_H__
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