snap.h

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//
// Copyright 2010 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.  
//
//

#pragma once

#include "maxheap.h"
#include <WTypes.h>
#include "matrix3.h"
#include "point2.h"



#define SNAP_2D 1       //!< 2 dimensional Snap
#define SNAP_25D    2   //!< 2.5 dimensional Snap
#define SNAP_3D 3       //!< 3 dimensional Snap



#define SNAPMODE_RELATIVE   0   //!< Relative snap mode.
#define SNAPMODE_ABSOLUTE   1   //!< Absolute snap mode.



#define SNAP_IN_3D                              (0)         //!< Snap to all points.
#define SNAP_IN_PLANE                           (1<<0)      //!< Snap only to points on the construction (or optionally specified) plane.
#define SNAP_UNSEL_OBJS_ONLY            (1<<1)              //!< Ignore selected nodes when considering snap points.
#define SNAP_SEL_OBJS_ONLY              (1<<2)              //!< Ignore unselected nodes when considering snap points.
#define SNAP_UNSEL_SUBOBJ_ONLY      (1<<3)                  //!< Ignore selected sub-object geometry when considering snap points.
#define SNAP_SEL_SUBOBJ_ONLY            (1<<4)              //!< Ignore unselected sub-object geometry when considering snap points.
#define SNAP_FORCE_3D_RESULT            (1<<5)              //!< Override user settings to force snap in 3D

#define SNAP_OFF_PLANE                      (1<<6)          

#define SNAP_TRANSPARENTLY              (1<<7)              
#define SNAP_APPLY_CONSTRAINTS      (1<<8)                  //!< \internal Used internally to suppresses any display in the viewports.
#define SNAP_PROJ_XAXIS                     (1<<9)          //!< \internal Used internally to suppresses any display in the viewports.
#define SNAP_PROJ_YAXIS                     (1<<10)         //!< \internal Used internally to suppresses any display in the viewports.
#define SNAP_PROJ_ZAXIS                     (1<<11)         //!< \internal Used internally to suppresses any display in the viewports.
#define SNAP_XFORM_AXIS                     (1<<12)         //!< Informs the osnapmanager to invalidate the com axis
#define SNAP_BEGIN_SEQ                      (1<<13) 
#define SNAP_END_SEQ                        (1<<14) 

#define SNAP_USE_XFORM_AXIS_AS_START_SNAP_POINT (1<<16) 


struct SnapInfo: public MaxHeapOperators 
{
    int snapType;           
    int strength;           
    int vertPriority;       
    int edgePriority;       
    int gIntPriority;       
    int gLinePriority;      
    DWORD flags;            
    Matrix3 plane;          
    Point3 bestWorld;       
    Point2 bestScreen;      
    int bestDist;           
    int priority;           
};