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Improved the handling of osgManipulator::Constraint, DraggerCallbacks and Command so that they now use a Visitor Pattern

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to ensure the correct methods on constraints and callbaks are called for each Command.  Also fixed the handling of
Constraints when applied to composite Draggers.
This commit is contained in:
Robert Osfield
2012-01-31 10:56:52 +00:00
parent 0381914b42
commit 7664d90504
6 changed files with 107 additions and 30 deletions
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24
include/osgManipulator/Command
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@@ -15,7 +15,7 @@
#ifndef OSGMANIPULATOR_COMMAND
#define OSGMANIPULATOR_COMMAND 1
#include <osgManipulator/Export>
#include <osgManipulator/Constraint>
#include <osg/LineSegment>
#include <osg/Plane>
@@ -25,7 +25,6 @@
namespace osgManipulator {
class Constraint;
/** Base class for motion commands that are generated by draggers. */
class OSGMANIPULATOR_EXPORT MotionCommand : public osg::Referenced
@@ -59,6 +58,9 @@ class OSGMANIPULATOR_EXPORT MotionCommand : public osg::Referenced
*/
virtual osg::Matrix getMotionMatrix() const = 0;
virtual void accept(const Constraint& constraint) { constraint.constrain(*this); }
virtual void accept(DraggerCallback& callback) { callback.receive(*this); }
/**
* Sets the matrix for transforming the command's local coordinate
* system to the world/object coordinate system.
@@ -107,6 +109,9 @@ class OSGMANIPULATOR_EXPORT TranslateInLineCommand : public MotionCommand
TranslateInLineCommand(const osg::LineSegment::vec_type& s, const osg::LineSegment::vec_type& e);
virtual void accept(const Constraint& constraint) {constraint.constrain(*this); }
virtual void accept(DraggerCallback& callback) { callback.receive(*this); }
virtual MotionCommand* createCommandInverse();
inline void setLine(const osg::LineSegment::vec_type& s, const osg::LineSegment::vec_type& e) { _line->start() = s; _line->end() = e; }
@@ -141,6 +146,9 @@ class OSGMANIPULATOR_EXPORT TranslateInPlaneCommand : public MotionCommand
TranslateInPlaneCommand(const osg::Plane& plane);
virtual void accept(const Constraint& constraint) {constraint.constrain(*this); }
virtual void accept(DraggerCallback& callback) { callback.receive(*this); }
virtual MotionCommand* createCommandInverse();
inline void setPlane(const osg::Plane& plane) { _plane = plane; }
@@ -177,6 +185,9 @@ class OSGMANIPULATOR_EXPORT Scale1DCommand : public MotionCommand
Scale1DCommand();
virtual void accept(const Constraint& constraint) {constraint.constrain(*this); }
virtual void accept(DraggerCallback& callback) { callback.receive(*this); }
virtual MotionCommand* createCommandInverse();
inline void setScale(double s) { _scale = s; }
@@ -219,6 +230,9 @@ class OSGMANIPULATOR_EXPORT Scale2DCommand : public MotionCommand
Scale2DCommand();
virtual void accept(const Constraint& constraint) {constraint.constrain(*this); }
virtual void accept(DraggerCallback& callback) { callback.receive(*this); }
virtual MotionCommand* createCommandInverse();
inline void setScale(const osg::Vec2d& s) { _scale = s; }
@@ -261,6 +275,9 @@ class OSGMANIPULATOR_EXPORT ScaleUniformCommand : public MotionCommand
ScaleUniformCommand();
virtual void accept(const Constraint& constraint) {constraint.constrain(*this); }
virtual void accept(DraggerCallback& callback) { callback.receive(*this); }
virtual MotionCommand* createCommandInverse();
inline void setScale(double s) { _scale = s; }
@@ -294,6 +311,9 @@ class OSGMANIPULATOR_EXPORT Rotate3DCommand : public MotionCommand
Rotate3DCommand();
virtual void accept(const Constraint& constraint) {constraint.constrain(*this); }
virtual void accept(DraggerCallback& callback) { callback.receive(*this); }
virtual MotionCommand* createCommandInverse();
inline void setRotation(const osg::Quat& rotation) { _rotation = rotation; }

30
include/osgManipulator/Constraint
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@@ -29,6 +29,32 @@ class TranslateInPlaneCommand;
class Scale1DCommand;
class Scale2DCommand;
class ScaleUniformCommand;
class Rotate3DCommand;
class DraggerCallback : virtual public osg::Object
{
public:
DraggerCallback():
osg::Object(true) {}
DraggerCallback(const DraggerCallback&, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY):
osg::Object(true) {}
META_Object(osgManipulator, DraggerCallback);
/**
* Receive motion commands. Returns true on success.
*/
virtual bool receive(const MotionCommand&) { return false; }
virtual bool receive(const TranslateInLineCommand& command) { return receive((MotionCommand&)command); }
virtual bool receive(const TranslateInPlaneCommand& command) { return receive((MotionCommand&)command); }
virtual bool receive(const Scale1DCommand& command) { return receive((MotionCommand&)command); }
virtual bool receive(const Scale2DCommand& command) { return receive((MotionCommand&)command); }
virtual bool receive(const ScaleUniformCommand& command) { return receive((MotionCommand&)command); }
virtual bool receive(const Rotate3DCommand& command) { return receive((MotionCommand&)command); }
};
class OSGMANIPULATOR_EXPORT Constraint : public osg::Referenced
{
@@ -40,9 +66,11 @@ class OSGMANIPULATOR_EXPORT Constraint : public osg::Referenced
virtual bool constrain(Scale1DCommand& command) const { return constrain((MotionCommand&)command); }
virtual bool constrain(Scale2DCommand& command) const { return constrain((MotionCommand&)command); }
virtual bool constrain(ScaleUniformCommand& command) const { return constrain((MotionCommand&)command); }
virtual bool constrain(const Rotate3DCommand& command) { return constrain((MotionCommand&)command); }
protected:
protected:
Constraint() {}
Constraint(osg::Node& refNode) : _refNode(&refNode) {}
virtual ~Constraint() {}

22
include/osgManipulator/Dragger
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@@ -40,28 +40,6 @@ class Rotate3DCommand;
/** Computes the nodepath from the given node all the way upto the root. */
extern OSGMANIPULATOR_EXPORT void computeNodePathToRoot(osg::Node& node, osg::NodePath& np);
class DraggerCallback : virtual public osg::Object
{
public:
DraggerCallback():
osg::Object(true) {}
DraggerCallback(const DraggerCallback&, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY):
osg::Object(true) {}
META_Object(osgManipulator, DraggerCallback);
/**
* Receive motion commands. Returns true on success.
*/
virtual bool receive(const MotionCommand&) { return false; }
virtual bool receive(const TranslateInLineCommand& command) { return receive((MotionCommand&)command); }
virtual bool receive(const TranslateInPlaneCommand& command) { return receive((MotionCommand&)command); }
virtual bool receive(const Scale1DCommand& command) { return receive((MotionCommand&)command); }
virtual bool receive(const Scale2DCommand& command) { return receive((MotionCommand&)command); }
virtual bool receive(const ScaleUniformCommand& command) { return receive((MotionCommand&)command); }
virtual bool receive(const Rotate3DCommand& command) { return receive((MotionCommand&)command); }
};
class OSGMANIPULATOR_EXPORT DraggerTransformCallback : public DraggerCallback
{