lineManip/lineManip.h

//-
// ==========================================================================
// Copyright 2015 Autodesk, Inc.  All rights reserved.
//
// Use of this software is subject to the terms of the Autodesk
// license agreement provided at the time of installation or download,
// or which otherwise accompanies this software in either electronic
// or hard copy form.
// ==========================================================================
//+

#include <maya/MTypeId.h>
#include <maya/MTypes.h>
#include <maya/MPxManipulatorNode.h>
#include <maya/MFnPlugin.h>
#include <maya/MObjectHandle.h>
#include <maya/MPxCommand.h>
#include <maya/MSyntax.h>
#include <maya/MDagModifier.h>

#include <maya/M3dView.h>
#include <maya/MGLFunctionTable.h>

#include "manipulatorMath.h"


//
// Custom manipulator class
//
class lineManip : public MPxManipulatorNode
{
public:
    lineManip();
    ~lineManip() override;
    void postConstructor() override;

    // Viewport 2.0 manipulator draw overrides
    void preDrawUI( const M3dView &view ) override;
    void drawUI(
        MHWRender::MUIDrawManager& drawManager,
        const MHWRender::MFrameContext& frameContext ) const override;

    // Important virtuals
    MStatus doPress( M3dView& view ) override;
    MStatus doDrag( M3dView& view ) override;
    MStatus doRelease( M3dView& view ) override;

    // Standard API required methods
    static void* creator();
    static MStatus initialize();

    // Utility method
    MStatus updateDragInformation();

    // Node id
    static MTypeId id;

private:
    // GL component name for drawing and picking
    MGLuint lineName;
    // Simple class for plane creation, intersection. Although
    // the manipulator is just a line we want it to move
    // within a plane
    planeMath plane;
    // Modified mouse position used for updating manipulator
    MPoint mousePointGlName;

    // Some data used for viewport 2.0 manip draw
    MPoint fLineStart;
    MPoint fLineEnd;
    short   fLineColorIndex;
    short   fSelectedLineColorIndex;
    bool fDrawManip;
};