mirror of
https://github.com/ptitSeb/Serious-Engine
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229 lines
9.0 KiB
C
229 lines
9.0 KiB
C
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/*
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* LWSDK Header File
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* Copyright 1999, NewTek, Inc.
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*
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* LWMESHES.H -- LightWave Geometry Services
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*
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* This header contains the declarations for globals for accessing
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* common geometric information.
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*/
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#ifndef LWSDK_MESHES_H
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#define LWSDK_MESHES_H
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#include <lwtypes.h>
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/*
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* Meshes are composed of points and polygons given by their internal
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* ID reference.
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*/
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typedef struct st_GCoreVertex * LWPntID;
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typedef struct st_GCorePolygon * LWPolID;
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/*
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* Polygon types are an extensible set of ID codes. Some common ones
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* are included here.
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*/
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#define LWPOLTYPE_FACE LWID_('F','A','C','E')
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#define LWPOLTYPE_CURV LWID_('C','U','R','V')
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#define LWPOLTYPE_PTCH LWID_('P','T','C','H')
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#define LWPOLTYPE_MBAL LWID_('M','B','A','L')
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#define LWPOLTYPE_BONE LWID_('B','O','N','E')
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/*
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* Polygon tags are indexed by an extensible set of ID codes. Some
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* common ones are included here.
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*/
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#define LWPTAG_SURF LWID_('S','U','R','F')
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#define LWPTAG_PART LWID_('P','A','R','T')
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#define LWPTAG_TXUV LWID_('T','X','U','V')
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/*
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* VMAPs are identifed by an extensible set of ID codes. Some common
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* ones are included here.
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*/
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#define LWVMAP_PICK LWID_('P','I','C','K')
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#define LWVMAP_WGHT LWID_('W','G','H','T')
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#define LWVMAP_MNVW LWID_('M','N','V','W')
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#define LWVMAP_TXUV LWID_('T','X','U','V')
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#define LWVMAP_MORF LWID_('M','O','R','F')
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#define LWVMAP_SPOT LWID_('S','P','O','T')
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#define LWVMAP_RGB LWID_('R','G','B',' ')
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#define LWVMAP_RGBA LWID_('R','G','B','A')
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/*
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* Scan callbacks allow the client to traverse the elements of the
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* mesh and get information about each one.
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*/
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typedef int LWPntScanFunc (void *, LWPntID);
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typedef int LWPolScanFunc (void *, LWPolID);
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/*
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* A LWMeshInfo is an allocated object that allows a mesh to be examined
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* through a set of query callbacks.
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*
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* priv private data for the mesh info implementation. Hands off!
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*
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* destroy destroy the mesh when done. A mesh should only be freed
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* by the client that created it.
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*
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* numPoints these functions return the size of the mesh as a count of
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* numPolygons its points and polygons.
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*
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* scanPoints iterate through elements in the mesh. The scan function
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* scanPolygons callback is called for each element in the mesh. If the
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* callback returns non-zero, the iteration stops and the
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* value is returned.
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*
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* pntBasePos return the base position of a point. This is the position
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* of the point at rest in the basic object coordinate system.
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*
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* pntOtherPos return an alternate position for the point. This many be
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* the same as the base position or it may be the position of
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* the point after some transformation. The nature of the
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* alternate position depends on how the mesh info was created.
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*
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* pntVLookup selects a vmap for reading vectors. The vmap is given by
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* an ID code for the type and a name string. The function
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* returns a pointer that may be used to select this same vmap
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* again quickly, or null for none.
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*
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* pntVSelect selects a vmap for reading vectors. The vmap is given by
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* the pointer returned from pntVLookup above. The function
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* returns the dimension of the vmap.
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*
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* pntVGet reads the vector value of the selected vmap for the given
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* point. The vmap can be set using either of the two
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* functions above. The vector must at least be as large as
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* the dimension of the vmap. The function returns true if
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* the point is mapped.
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*
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* pntVPGet just like the above, but reads the vector value of the
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* selected vmap for the given point and polygon.
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*
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* polType returns the type of a polygon as an LWPOLTYPE_* code.
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*
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* polSize returns the number of vertices that the polygon has.
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*
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* polVertex returns the point ID for the given vertex of the polygon.
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* Vertices are indexed starting from zero.
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*
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* polTag returns the tag string of the given type associated with the
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* polygon. A null string pointer means that the polygon does
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* not have a tag of that type.
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*
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* polFlags returns the polygon flags, matching those used by the MeshEdit
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* polygin info structure in modeler.
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*/
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typedef struct st_LWMeshInfo * LWMeshInfoID;
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typedef struct st_LWMeshInfo {
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void *priv;
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void (*destroy) (LWMeshInfoID);
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int (*numPoints) (LWMeshInfoID);
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int (*numPolygons) (LWMeshInfoID);
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int (*scanPoints) (LWMeshInfoID, LWPntScanFunc *, void *);
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int (*scanPolys) (LWMeshInfoID, LWPolScanFunc *, void *);
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void (*pntBasePos) (LWMeshInfoID, LWPntID, LWFVector pos);
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void (*pntOtherPos) (LWMeshInfoID, LWPntID, LWFVector pos);
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void * (*pntVLookup) (LWMeshInfoID, LWID, const char *);
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int (*pntVSelect) (LWMeshInfoID, void *);
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int (*pntVGet) (LWMeshInfoID, LWPntID, float *vector);
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LWID (*polType) (LWMeshInfoID, LWPolID);
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int (*polSize) (LWMeshInfoID, LWPolID);
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LWPntID (*polVertex) (LWMeshInfoID, LWPolID, int);
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const char * (*polTag) (LWMeshInfoID, LWPolID, LWID);
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int (*pntVPGet) (LWMeshInfoID, LWPntID, LWPolID, float *vector);
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unsigned int (*polFlags) (LWMeshInfoID, LWPolID);
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int (*pntVIDGet) (LWMeshInfoID, LWPntID, float *vector, void *);
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int (*pntVPIDGet) (LWMeshInfoID, LWPntID, LWPolID, float *vector, void *);
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} LWMeshInfo;
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/*
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* LightWave maintains a database which is essentially an image of
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* all the LWO2 object files loaded into the application. Each object
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* contains some number of layers which can be scanned. The functions
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* for accessing this information is the "Scene Objects" global.
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*
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* numObjects returns the total number of objects in the scene.
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* These are the unique object files which are loaded,
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* which may have nothing to do with the animatable
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* items in the scene.
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*
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* filename returns the name of the source object file. Objects
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* are indexed from 0 to numObjects - 1.
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*
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* userName returns the name of the object as seen by the user.
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* This is typically the base filename without path or
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* extension, or "Unnamed N" for unsaved objects. These
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* are not guaranteed to be unique.
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*
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* refName returns an internal reference name for this object.
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* The reference name is guaranteed to be unique and
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* unchanging for the lifetime of the object. This
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* string contains control characters so it cannot be
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* confused with a filename.
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*
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* maxLayers returns a value one greater than the largest index of
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* any existing layer.
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*
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* layerExists returns true if the layer with the given index exists.
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* Layers are indexed from 0 to maxLayers - 1.
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*
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* pivotPoint fills in the postion vector with the pivot point for
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* the given layer.
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*
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* layerMesh returns a mesh info structure for the given layer. The
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* mesh will reference vertices in their rest positions.
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*
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* layerName returns the name string assigned to the layer, or null
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* if none.
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*
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* layerVis returns true if the layer is marked as visible.
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*
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* numVMaps returns the total number of vmaps in the scene with the
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* given type code. A code of zero selects all vmaps of
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* every type.
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*
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* vmapName returns the name of the vmap with the given index, from
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* 0 to numVMaps - 1.
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*
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* vmapDim returns the dimension of the vmap vector.
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*
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* vmapType returns the type code of the vmap. The index is into the
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* list of all vmaps given by numVMap with type code zero.
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*/
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#define LWOBJECTFUNCS_GLOBAL "Scene Objects 4"
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typedef struct st_LWObjectFuncs {
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int (*numObjects) (void);
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const char * (*filename) (int obj);
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int (*maxLayers) (int obj);
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int (*layerExists) (int obj, int lnum);
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void (*pivotPoint) (int obj, int lnum, LWFVector pos);
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LWMeshInfo * (*layerMesh) (int obj, int lnum);
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int (*numVMaps) (LWID);
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const char * (*vmapName) (LWID, int index);
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int (*vmapDim) (LWID, int index);
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LWID (*vmapType) (int index);
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const char * (*layerName) (int obj, int lnum);
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int (*layerVis) (int obj, int lnum);
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const char * (*userName) (int obj);
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const char * (*refName) (int obj);
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} LWObjectFuncs;
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#endif
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