ModelCtl.c

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#define WIN32_LEAN_AND_MEAN
#include        <windows.h>

#include        <math.h>
#include        <stdlib.h>
#include        <assert.h>

#define BUILD_MODELCTL
#include        "modelctl.h"
#include        "errorlog.h"

geBoolean ModelCtl_Init(void)
{
        return GE_TRUE;
}

geBoolean ModelCtl_Reset(geWorld *World)
{
        geEntity_EntitySet *    Set;
        geEntity *                              Entity;
 
        if      (World == NULL)
                return GE_TRUE;

        Set = geWorld_GetEntitySet(World, "ModelController");
        if      (Set == NULL)
                return GE_TRUE;

        Entity = geEntity_EntitySetGetNextEntity(Set, NULL);
        while   (Entity)
        {
                ModelController *               Controller;

                Controller = geEntity_GetUserData(Entity);
                Controller->LastTime = 0.0f;

                Entity = geEntity_EntitySetGetNextEntity(Set, Entity);
        }

        return GE_TRUE;
}

geBoolean ModelCtl_Shutdown(void)
{
        return GE_TRUE;
}

geBoolean ModelCtl_Frame(geWorld *World, const geXForm3d *XForm, geFloat DeltaTime)
{
        geEntity_EntitySet *    Set;
        geEntity *                              Entity;
 
        if      (World == NULL)
                return GE_TRUE;

        Set = geWorld_GetEntitySet(World, "ModelController");
        if      (Set == NULL)
                return GE_TRUE;

        Entity = geEntity_EntitySetGetNextEntity(Set, NULL);
        while   (Entity)
        {
                ModelController *       Controller;
                geMotion *                      Motion;
                gePath *                        Path;
                geFloat                         StartTime;
                geFloat                         EndTime;
                geXForm3d                       XForm;

                #define MAX_NAME 200
                char    EntityName[MAX_NAME];

                geEntity_GetName(Entity, EntityName, MAX_NAME-1);
                EntityName[MAX_NAME-1]=0;

                Controller = geEntity_GetUserData(Entity);
                if (Controller->Model==NULL)
                        {
                                geErrorLog_AddString(0,"ModelCtl_Frame: Model controller has no model:",EntityName);
                                return GE_FALSE;
                        }
                Motion = geWorld_ModelGetMotion(Controller->Model);
                if (Motion == NULL)
                        {
                                geErrorLog_AddString(0,"ModelCtl_Frame: Model controller has no motion:",EntityName);
                                return GE_FALSE;
                        }
                Path = geMotion_GetPath(Motion, 0);
                if (Path == NULL)
                        {
                                geErrorLog_AddString(0,"ModelCtl_Frame: Model controller has no path in its motion:",EntityName);
                                return GE_FALSE;
                        }
                gePath_GetTimeExtents(Path, &StartTime, &EndTime);
                gePath_Sample(Path, StartTime + Controller->LastTime, &XForm);

                geWorld_SetModelXForm(World, Controller->Model, &XForm);
                
                Controller->LastTime = (geFloat)fmod(Controller->LastTime + DeltaTime, EndTime - StartTime);

                Entity = geEntity_EntitySetGetNextEntity(Set, Entity);
        }

        return GE_TRUE;
}

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