134 lines
4.2 KiB
C++
134 lines
4.2 KiB
C++
/////////////////////////////////////////////////////
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/////////////////////////////////////////////////////
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//
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// FindPath
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//
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/////////////////////////////////////////////////////
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/////////////////////////////////////////////////////
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#include "CKAll.h"
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#include "N3dGraph.h"
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CKObjectDeclaration *FillBehaviorFindPathDecl();
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CKERROR CreateFindPathProto(CKBehaviorPrototype **);
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int FindPath(const CKBehaviorContext& behcontext);
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CKERROR FindPathCallback(const CKBehaviorContext& behcontext);
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CKObjectDeclaration *FillBehaviorFindPathDecl()
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{
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CKObjectDeclaration *od = CreateCKObjectDeclaration("Find Path");
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od->SetDescription("Returns a group of nodes to go by to reach a goal from a starting point.");
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/* rem:
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<SPAN CLASS=in>In: </SPAN>triggers the process.<BR>
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<BR>
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<SPAN CLASS=out>Path Found: </SPAN>is activated if a path is found.<BR>
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<SPAN CLASS=out>No Path Found: </SPAN>is activated if no path is found.<BR>
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<BR>
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<SPAN CLASS=pin>Nodal Path: </SPAN>group of nodal paths to search in.<BR>
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<SPAN CLASS=pin>Start Object: </SPAN>starting point.<BR>
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<SPAN CLASS=pin>Goal Object: </SPAN>destination to reach.<BR>
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<BR>
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<SPAN CLASS=pout>Object List: </SPAN>list of nodes passed though on way to destination. List will be empty if no path is found.<BR>
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<BR>
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<a href="nodal.htm">More information on Nodal Paths.</a><BR>
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See also : other Nodal related building blocks in the Nodal Path folder of 3D Transformations.<BR>
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*/
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od->SetType( CKDLL_BEHAVIORPROTOTYPE);
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od->SetGuid(CKGUID(0x78c60de,0x6c744614));
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od->SetAuthorGuid(VIRTOOLS_GUID);
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od->SetAuthorName("Virtools");
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od->SetVersion(0x00010000);
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od->SetCreationFunction(CreateFindPathProto);
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od->SetCompatibleClassId(CKCID_BEOBJECT);
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od->SetCategory("3D Transformations/Nodal Path");
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return od;
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}
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CKERROR CreateFindPathProto(CKBehaviorPrototype **pproto)
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{
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CKBehaviorPrototype *proto = NULL;
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proto = CreateCKBehaviorPrototype("Find Path");
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if(!proto) return CKERR_OUTOFMEMORY;
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proto->DeclareInput("In");
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proto->DeclareOutput("Path Found");
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proto->DeclareOutput("No Path Found");
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proto->DeclareInParameter("Nodal Path",CKPGUID_GROUP);
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proto->DeclareInParameter("Start Object",CKPGUID_3DENTITY);
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proto->DeclareInParameter("Goal Object",CKPGUID_3DENTITY);
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proto->DeclareOutParameter("Object List",CKPGUID_GROUP);
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proto->SetFlags(CK_BEHAVIORPROTOTYPE_NORMAL);
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proto->SetFunction( FindPath );
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proto->SetBehaviorCallbackFct( FindPathCallback );
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*pproto = proto;
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return CK_OK;
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}
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int FindPath(const CKBehaviorContext& behcontext)
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{
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CKBehavior* beh = behcontext.Behavior;
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CKContext* ctx = behcontext.Context;
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CKAttributeManager* attman = ctx->GetAttributeManager();
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beh->ActivateInput(0,FALSE);
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CKGroup* group = (CKGroup*)beh->GetInputParameterObject(0);
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if(!group) VXTHROW "No group given";
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CKParameterOut* param = group->GetAttributeParameter(attman->GetAttributeTypeByName(Network3dName));
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if(!param) VXTHROW "Given Group isn't a Network";
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N3DGraph* graph;
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param->GetValue(&graph);
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if(!graph) VXTHROW "There is no Graph attached";
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CK3dEntity* s = (CK3dEntity*)beh->GetInputParameterObject(1);
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if(graph->SeekPosition(CKOBJID(s))==-1) return CKBR_PARAMETERERROR;
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CK3dEntity* e = (CK3dEntity*)beh->GetInputParameterObject(2);
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if(graph->SeekPosition(CKOBJID(e))==-1) return CKBR_PARAMETERERROR;
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CKGroup* path = (CKGroup*)beh->GetOutputParameterObject(0);
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path->Clear();
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// the core code
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graph->FindPath(s,e,path);
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// Output Activation
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if(path->GetObjectCount() >0) beh->ActivateOutput(0); // Path found
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else beh->ActivateOutput(1); // No path found
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return CKBR_OK;
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}
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CKERROR FindPathCallback(const CKBehaviorContext& behcontext)
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{
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CKBehavior *beh = behcontext.Behavior;
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CKContext* ctx = beh->GetCKContext();
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switch(behcontext.CallbackMessage){
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case CKM_BEHAVIORCREATE:
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case CKM_BEHAVIORLOAD:
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{
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CKGroup* group = (CKGroup*)ctx->CreateObject(CKCID_GROUP,"FindPathGroup",beh->IsDynamic()?CK_OBJECTCREATION_DYNAMIC:CK_OBJECTCREATION_NONAMECHECK);
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group->ModifyObjectFlags(CK_OBJECT_NOTTOBELISTEDANDSAVED,0);
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beh->SetOutputParameterObject(0,group);
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}
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break;
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case CKM_BEHAVIORDELETE:
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{
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CKGroup* group = (CKGroup*)beh->GetOutputParameterObject(0);
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CKDestroyObject(group);
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}
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break;
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}
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return CKBR_OK;
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}
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