565 lines
15 KiB
C++
565 lines
15 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSG_SHAPE
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#define OSG_SHAPE 1
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#include <osg/Object>
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#include <osg/Vec3>
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#include <osg/Quat>
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#include <osg/Plane>
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#include <osg/Array>
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namespace osg {
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// forward decare visitors.
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class ShapeVisitor;
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class ConstShapeVisitor;
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/** META_StateAttribute macro define the standard clone, isSameKindAs,
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* className and getType methods.
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* Use when subclassing from Object to make it more convinient to define
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* the standard pure virtual methods which are required for all Object
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* subclasses.*/
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#define META_Shape(library,name) \
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virtual osg::Object* cloneType() const { return new name(); } \
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virtual osg::Object* clone(const osg::CopyOp& copyop) const { return new name (*this,copyop); } \
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virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const name *>(obj)!=NULL; } \
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virtual const char* libraryName() const { return #library; } \
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virtual const char* className() const { return #name; } \
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virtual void accept(osg::ShapeVisitor& sv) { sv.apply(*this); } \
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virtual void accept(osg::ConstShapeVisitor& csv) const { csv.apply(*this); }
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/** Base class for all shape types.
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* Shapes are used to either for culling and collision detection or
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* to define the geometric shape of procedurally generate Geometry.
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*/
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class SG_EXPORT Shape : public Object
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{
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public:
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Shape() {}
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Shape(const Shape& sa,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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Object(sa,copyop) {}
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/** Clone the type of an attribute, with Object* return type.
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Must be defined by derived classes.*/
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virtual Object* cloneType() const = 0;
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/** Clone an attribute, with Object* return type.
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Must be defined by derived classes.*/
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virtual Object* clone(const CopyOp&) const = 0;
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/** return true if this and obj are of the same kind of object.*/
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virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const Shape*>(obj)!=NULL; }
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/** return the name of the attribute's library.*/
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virtual const char* libraryName() const { return "osg"; }
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/** return the name of the attribute's class type.*/
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virtual const char* className() const { return "Shape"; }
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/** accept a non const shape visitor which can be used on non const shape objects.
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Must be defined by derived classes.*/
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virtual void accept(ShapeVisitor&)=0;
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/** accept a const shape visitor which can be used on const shape objects.
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Must be defined by derived classes.*/
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virtual void accept(ConstShapeVisitor&) const =0;
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protected:
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virtual ~Shape() {}
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};
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// forward declartions of Shape types.
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class Sphere;
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class Box;
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class Cone;
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class Cylinder;
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class InfinitePlane;
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class TriangleMesh;
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class ConvexHull;
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class HeightField;
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class CompositeShape;
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class ShapeVisitor
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{
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public:
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ShapeVisitor() {}
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virtual void apply(Sphere&) {}
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virtual void apply(Box&) {}
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virtual void apply(Cone&) {}
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virtual void apply(Cylinder&) {}
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virtual void apply(InfinitePlane&) {}
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virtual void apply(TriangleMesh&) {}
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virtual void apply(ConvexHull&) {}
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virtual void apply(HeightField&) {}
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virtual void apply(CompositeShape&) {}
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};
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class ConstShapeVisitor
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{
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public:
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ConstShapeVisitor() {}
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virtual void apply(const Sphere&) {}
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virtual void apply(const Box&) {}
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virtual void apply(const Cone&) {}
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virtual void apply(const Cylinder&) {}
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virtual void apply(const InfinitePlane&) {}
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virtual void apply(const TriangleMesh&) {}
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virtual void apply(const ConvexHull&) {}
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virtual void apply(const HeightField&) {}
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virtual void apply(const CompositeShape&) {}
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};
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class Sphere : public Shape
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{
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public:
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Sphere():
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_center(0.0f,0.0f,0.0f),
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_radius(1.0f) {}
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Sphere(const osg::Vec3& center,float radius):
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_center(center),
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_radius(radius) {}
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Sphere(const Sphere& sphere,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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Shape(sphere,copyop),
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_center(sphere._center),
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_radius(sphere._radius) {}
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META_Shape(osg, Sphere);
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inline bool valid() const { return _radius>=0.0f; }
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inline void set(const Vec3& center,float radius)
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{
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_center = center;
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_radius = radius;
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}
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inline void setCenter(const Vec3& center) { _center = center; }
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inline const Vec3& getCenter() const { return _center; }
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inline void setRadius(float radius) { _radius = radius; }
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inline float getRadius() const { return _radius; }
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protected:
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virtual ~Sphere() {}
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Vec3 _center;
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float _radius;
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};
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class Box : public Shape
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{
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public:
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Box():
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_center(0.0f,0.0f,0.0f),
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_halfLengths(0.5f,0.5f,0.5f) {}
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Box(const osg::Vec3& center,float width):
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_center(center),
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_halfLengths(width*0.5f,width*0.5f,width*0.5f) {}
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Box(const osg::Vec3& center,float lengthX,float lengthY, float lengthZ):
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_center(center),
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_halfLengths(lengthX*0.5f,lengthY*0.5f,lengthZ*0.5f) {}
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Box(const Box& box,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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Shape(box,copyop),
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_center(box._center),
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_halfLengths(box._halfLengths),
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_rotation(box._rotation) {}
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META_Shape(osg, Box);
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inline bool valid() const { return _halfLengths.x()>=0.0f; }
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inline void set(const Vec3& center,const Vec3& halfLengths)
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{
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_center = center;
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_halfLengths = halfLengths;
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}
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inline void setCenter(const Vec3& center) { _center = center; }
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inline const Vec3& getCenter() const { return _center; }
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inline void setHalfLengths(const Vec3& halfLengths) { _halfLengths = halfLengths; }
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inline const Vec3& getHalfLengths() const { return _halfLengths; }
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inline void setRotation(const Quat& quat) { _rotation = quat; }
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inline const Quat& getRotation() const { return _rotation; }
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inline Matrix getRotationMatrix() const { return Matrix(_rotation); }
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inline bool zeroRotation() const { return _rotation.zeroRotation(); }
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protected:
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virtual ~Box() {}
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Vec3 _center;
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Vec3 _halfLengths;
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Quat _rotation;
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};
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class Cone : public Shape
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{
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public:
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Cone():
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_center(0.0f,0.0f,0.0f),
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_radius(1.0f),
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_height(1.0f) {}
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Cone(const osg::Vec3& center,float radius,float height):
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_center(center),
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_radius(radius),
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_height(height) {}
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Cone(const Cone& cone,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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Shape(cone,copyop),
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_center(cone._center),
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_radius(cone._radius),
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_height(cone._height),
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_rotation(cone._rotation) {}
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META_Shape(osg, Cone);
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inline bool valid() const { return _radius>=0.0f; }
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inline void set(const Vec3& center,float radius, float height)
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{
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_center = center;
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_radius = radius;
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_height = height;
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}
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inline void setCenter(const Vec3& center) { _center = center; }
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inline const Vec3& getCenter() const { return _center; }
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inline void setRadius(float radius) { _radius = radius; }
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inline float getRadius() const { return _radius; }
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inline void setHeight(float height) { _height = height; }
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inline float getHeight() const { return _height; }
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inline void setRotation(const Quat& quat) { _rotation = quat; }
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inline const Quat& getRotation() const { return _rotation; }
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inline Matrix getRotationMatrix() const { return Matrix(_rotation); }
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inline bool zeroRotation() const { return _rotation.zeroRotation(); }
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inline float getBaseOffsetFactor() const { return 0.25f; }
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inline float getBaseOffset() const { return -getBaseOffsetFactor()*getHeight(); }
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protected:
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virtual ~Cone() {}
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Vec3 _center;
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float _radius;
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float _height;
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Quat _rotation;
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};
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class Cylinder : public Shape
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{
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public:
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Cylinder():
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_center(0.0f,0.0f,0.0f),
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_radius(1.0f),
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_height(1.0f) {}
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Cylinder(const osg::Vec3& center,float radius,float height):
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_center(center),
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_radius(radius),
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_height(height) {}
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Cylinder(const Cylinder& cylinder,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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Shape(cylinder,copyop),
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_center(cylinder._center),
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_radius(cylinder._radius),
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_height(cylinder._height),
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_rotation(cylinder._rotation) {}
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META_Shape(osg, Cylinder);
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inline bool valid() const { return _radius>=0.0f; }
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inline void set(const Vec3& center,float radius, float height)
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{
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_center = center;
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_radius = radius;
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_height = height;
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}
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inline void setCenter(const Vec3& center) { _center = center; }
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inline const Vec3& getCenter() const { return _center; }
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inline void setRadius(float radius) { _radius = radius; }
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inline float getRadius() const { return _radius; }
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inline void setHeight(float height) { _height = height; }
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inline float getHeight() const { return _height; }
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inline void setRotation(const Quat& quat) { _rotation = quat; }
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inline const Quat& getRotation() const { return _rotation; }
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inline Matrix getRotationMatrix() const { return Matrix(_rotation); }
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bool zeroRotation() const { return _rotation.zeroRotation(); }
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protected:
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virtual ~Cylinder() {}
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Vec3 _center;
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float _radius;
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float _height;
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Quat _rotation;
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};
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class InfinitePlane : public Shape, public Plane
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{
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public:
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InfinitePlane() {}
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InfinitePlane(const InfinitePlane& plane,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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Shape(plane,copyop),
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Plane(plane) {}
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META_Shape(osg, InfinitePlane);
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protected:
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virtual ~InfinitePlane() {}
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};
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class TriangleMesh : public Shape
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{
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public:
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TriangleMesh() {}
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TriangleMesh(const TriangleMesh& mesh,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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Shape(mesh,copyop),
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_vertices(mesh._vertices),
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_indices(mesh._indices) {}
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META_Shape(osg, TriangleMesh);
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void setVertices(Vec3Array* vertices) { _vertices = vertices; }
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Vec3Array* getVertices() { return _vertices.get(); }
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const Vec3Array* getVertices() const { return _vertices.get(); }
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void setIndices(IndexArray* indices) { _indices = indices; }
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IndexArray* getIndices() { return _indices.get(); }
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const IndexArray* getIndices() const { return _indices.get(); }
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protected:
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~TriangleMesh() {}
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ref_ptr<Vec3Array> _vertices;
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ref_ptr<IndexArray> _indices;
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};
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class ConvexHull : public TriangleMesh
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{
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public:
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ConvexHull() {}
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ConvexHull(const ConvexHull& hull,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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TriangleMesh(hull,copyop) {}
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META_Shape(osg, TriangleMesh);
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protected:
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~ConvexHull() {}
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};
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class SG_EXPORT HeightField : public Shape
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{
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public:
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HeightField() {}
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HeightField(const HeightField& mesh,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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Shape(mesh,copyop),
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_columns(0),
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_rows(0),
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_origin(0.0f,0.0f,0.0f),
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_dx(1.0f),
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_dy(1.0f) {}
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virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const HeightField*>(obj)!=NULL; }
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virtual const char* libraryName() const { return "osg"; }
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virtual const char* className() const { return "HeightField"; }
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virtual void accept(osg::ShapeVisitor& sv) { sv.apply(*this); }
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virtual void accept(osg::ConstShapeVisitor& csv) const { csv.apply(*this); }
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inline unsigned int getNumColumns() const { return _columns; }
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inline unsigned int getNumRows() const { return _rows; }
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inline void setOrigin(const osg::Vec3& origin) { _origin = origin; }
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inline const osg::Vec3& getOrigin() const { return _origin; }
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inline void setXInterval(float dx) { _dx = dx; }
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inline float getXInterval() const { return _dx; }
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inline void setYInterval(float dy) { _dy = dy; }
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inline float getYInterval() const { return _dy; }
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virtual float getHeight(unsigned int c,unsigned int r) const = 0;
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virtual Vec3 getNormal(unsigned int c,unsigned int r) const;
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inline void setRotation(const Quat& quat) { _rotation = quat; }
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inline const Quat& getRotation() const { return _rotation; }
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inline Matrix getRotationMatrix() const { return Matrix(_rotation); }
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inline bool zeroRotation() const { return _rotation.zeroRotation(); }
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protected:
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~HeightField() {}
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unsigned int _columns,_rows;
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osg::Vec3 _origin;
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float _dx;
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float _dy;
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Quat _rotation;
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};
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class SG_EXPORT Grid : public HeightField
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{
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public:
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Grid();
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Grid(const Grid& mesh,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
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META_Shape(osg,Grid);
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void allocateGrid(unsigned int numColumns,unsigned int numRows);
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void setHeight(unsigned int c,unsigned int r,float value)
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{
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_heights[c+r*_columns] = value;
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}
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virtual float getHeight(unsigned int c,unsigned int r) const
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{
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return _heights[c+r*_columns];
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}
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protected:
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~Grid();
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typedef std::vector<float> HeightList;
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HeightList _heights;
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};
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class CompositeShape : public Shape
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{
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public:
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typedef std::vector< ref_ptr<Shape> > ChildList;
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CompositeShape() {}
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CompositeShape(const CompositeShape& cs,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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Shape(cs,copyop),
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_children(cs._children) {}
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META_Shape(osg, CompositeShape);
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/** Set the shape that encloses all of the children.*/
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void setShape(Shape* shape) { _shape = shape; }
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/** Get the shape that encloses all of the children.*/
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Shape* getShape() { return _shape.get(); }
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/** Get the const shape that encloses all of the children.*/
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const Shape* getShape() const { return _shape.get(); }
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/** Get the number of children of this composite shape.*/
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unsigned int getNumChildren() const { return _children.size(); }
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/** Get a child.*/
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Shape* getChild(unsigned int i) { return _children[i].get(); }
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/** Get a const child.*/
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const Shape* getChild(unsigned int i) const { return _children[i].get(); }
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/** Add a child to the list.*/
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void addChild(Shape* shape) { _children.push_back(shape); }
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/** remove a child from the list.*/
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void removeChild(unsigned int i) { _children.erase(_children.begin()+i); }
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/** find the index number of child, if child is not found then it returns getNumChildren(),
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* so should be used in similar sytle of STL's result!=end().*/
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unsigned int findChildNo(Shape* shape) const
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{
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for (unsigned int childNo=0;childNo<_children.size();++childNo)
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{
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if (_children[childNo]==shape) return childNo;
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}
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return _children.size(); // node not found.
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}
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protected:
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~CompositeShape() {}
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ref_ptr<Shape> _shape;
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ChildList _children;
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};
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}
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#endif
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