// Mesh.cpp



#include <windows.h>

//#include <stdio.h>



#include "Types.h"

#include "Math.h"

#include "Misc.h"

#include "Object.h"

#include "Model.h"

#include "Box.h"

#include "Mesh.h"





extern CModel

	Model;





CMesh::CMesh()

{

	Obj = NULL;

	Used = NULL;



	NumVerts = 0;

	NumFaces = 0;

	NumNodes = 0;



	VertList = NULL;

	FaceList = NULL;

	NodeList = NULL;

}





CMesh::~CMesh()

{

	Obj = NULL;

	delete [] Used;

	Used = NULL;



	NumVerts = 0;

	NumFaces = 0;

	NumNodes = 0;



	delete [] VertList;

	delete [] FaceList;

	delete [] NodeList;



	VertList = NULL;

	FaceList = NULL;

	NodeList = NULL;

}





void CMesh::Object( const char *name )

{

	s32

		i;



	Obj = Model.Find( name );

	if (!Obj)

	{

		Error( "Cannot find object: '%s'", name );

		return;

	}





	Used = new s8[Obj->NumFaces];

	for (i=0; i<Obj->NumFaces; i++)

		Used[i] = FALSE;





	NumVerts = Obj->NumVerts;

	VertList = new CTwinVert[NumVerts];



	for (i=0; i<NumVerts; i++)

	{

		VertList[i].Set( 0, Obj->GetVert( 0, i ) );

		VertList[i].Set( 1, Obj->GetVert( 1, i ) );

	}

}





void CMesh::Tag( const char *name )

{

	CObject

		*obj;

	CBox

		box;

	SFace

		*face;

	s32

		i,

		j,

		count;



	if (!Obj)

		return;





	obj = Model.Find( name );

	if (!obj)

	{

		Error( "Cannot find object: '%s'", name );

		return;

	}



	box.Load( obj );





	for (i=0; i<Obj->NumFaces; i++)

	{

		face = Obj->GetFace( i );



		count = 0;

		for (j=0; j<3; j++)

		{

			if (box.ContainsPoint( Obj->GetVert( 0, face->vtx[j] )))

				count++;

		}



		if (count == 3)

			Used[i] = TRUE;

	}

}





void CMesh::UnTag( const char *name )

{

	CObject

		*obj;

	CBox

		box;

	SFace

		*face;

	s32

		i,

		j,

		count;



	if (!Obj)

		return;





	obj = Model.Find( name );

	if (!obj)

	{

		Error( "Cannot find object: '%s'", name );

		return;

	}



	box.Load( obj );





	for (i=0; i<Obj->NumFaces; i++)

	{

		face = Obj->GetFace( i );



		count = 0;

		for (j=0; j<3; j++)

		{

			if (box.ContainsPoint( Obj->GetVert( 0, face->vtx[j] )))

				count++;

		}



		if (count == 3)

			Used[i] = FALSE;

	}

}





void CMesh::TagAll()

{

	s32

		i;



	if (!Obj)

		return;





	for (i=0; i<Obj->NumFaces; i++)

		Used[i] = TRUE;

}





void CMesh::Grab()

{

	s32

		i,

		j;



	if (!Obj)

		return;





	NumFaces = 0;

	for (i=0; i<Obj->NumFaces; i++)

	{

		if (Used[i])

			NumFaces++;

	}





	FaceList = new SFace[NumFaces];

	j = 0;

	for (i=0; i<Obj->NumFaces; i++)

	{

		if (Used[i])

		{

			FaceList[j] = *Obj->GetFace( i );

			j++;

		}

	}

}





Vector3 *CMesh::GetVert( const s32 frame, const s32 index )

{

	return( VertList[index].Get( frame ) );

}