#include "stdafx.h"


#define BuildTangentSpace_GUID	CKGUID(0x1fb64cad,0x283e01bb)

//-----------------------------------------------------------------------------
int BuildTangentSpace(const CKBehaviorContext& behcontext)
{
	CKBehavior* beh = behcontext.Behavior;
	CKMesh* mesh = (CKMesh*)beh->GetTarget();
	if( !mesh ) return CKBR_PARAMETERERROR;

	CKBOOL remove = FALSE;
	beh->GetInputParameter(0)->GetValue( &remove );

	if( remove ){
		mesh->SetFlags(mesh->GetFlags() & ~VXMESH_GENTANSPACE);
	} else {
		mesh->SetFlags(mesh->GetFlags() | VXMESH_GENTANSPACE);
	}
	beh->ActivateOutput(0);

	return CKBR_OK;
}

//-----------------------------------------------------------------------------
CKERROR CreateBuildTangentSpaceProto(CKBehaviorPrototype **pproto)
{
	CKBehaviorPrototype *proto = CreateCKBehaviorPrototype("Build Tangent Space");
	if(!proto) return CKERR_OUTOFMEMORY;

	proto->DeclareInput("In");
	proto->DeclareOutput("Out");

	proto->DeclareInParameter( "Remove", CKPGUID_BOOL, "FALSE" );
	
	proto->SetFlags(CK_BEHAVIORPROTOTYPE_NORMAL);
	proto->SetFunction(BuildTangentSpace);
	proto->SetBehaviorFlags( (CK_BEHAVIOR_FLAGS)(CKBEHAVIOR_TARGETABLE) );

	*pproto = proto;
	return CK_OK;
}

//-----------------------------------------------------------------------------
CKObjectDeclaration	*FillBehaviorBuildTangentSpace()
{
	CKObjectDeclaration *od = CreateCKObjectDeclaration("Build Tangent Space");	
	od->SetDescription("Ask the mesh to build (or remove) tangent space (used for bump mapping for example).");
	od->SetCategory("Shaders/General");
	od->SetType(CKDLL_BEHAVIORPROTOTYPE);
	od->SetGuid(BuildTangentSpace_GUID);
	od->SetAuthorGuid(VIRTOOLS_GUID);
	od->SetAuthorName("Virtools");
	od->SetVersion(0x00010000);
	od->SetCreationFunction(CreateBuildTangentSpaceProto);
	od->SetCompatibleClassId(CKCID_MESH);
	return od;
}