//------------------------------------------------------------------------------
// Private Functions:
//------------------------------------------------------------------------------
GameObj* gameObjCreate(unsigned long type, float scale, Vector2D* pPos, Vector2D* pVel, float dir)
{
unsigned long i;
Vector2D zero = { 0.0f, 0.0f };
AE_ASSERT_PARM(type < sGameObjBaseNum);
// 找游戏对象列表中没用过的位置
for (i = 0; i < GAME_OBJ_NUM_MAX; i++)
{
GameObj* pInst = sGameObjList + i;
// 找非活动对象的位置
if (pInst->flag == 0)
{
// 找到了
pInst->pObject = sGameObjBaseList + type;
pInst->flag = FLAG_ACTIVE;
pInst->scale = scale;
pInst->posCurr = pPos ? *pPos : zero;
pInst->velCurr = pVel ? *pVel : zero;
pInst->dirCurr = dir;
// 返回新创建的对象实例
return pInst;
}
}
// 位置满了
return 0;
}
GameObjInst* gameObjInstCreate(u32 type, f32 scale, AEVec2* pPos, AEVec2* pVel, f32 dir, bool forceCreate, GameObjInst *parent )
{
AEVec2 zero = { 0.0f, 0.0f };
AE_ASSERT_PARM(type < sGameObjNum);
// loop through the object instance list to find a non-used object instance
for (u32 i = 0; i < GAME_OBJ_INST_NUM_MAX; i++)
{
GameObjInst* pInst = sGameObjInstList + i;
// check if current instance is not used
if (pInst->flag == 0)
{
// it is not used => use it to create the new instance
pInst->pObject = sGameObjList + type;
pInst->type = type;
pInst->score = 0;
pInst->flag = FLAG_ACTIVE;
pInst->life = 1.0f;
pInst->scale = scale;
pInst->posCurr = pPos ? *pPos : zero;
pInst->velCurr = pVel ? *pVel : zero;
pInst->dirCurr = dir;
pInst->parent = parent;
pInst->pUserData = NULL;
// keep track the number of asteroid
if (pInst->pObject->type == TYPE_ASTEROID)
sAstCtr++;
// return the newly created instance
return pInst;
}
}
if (forceCreate)
{
f32 scaleMin = FLT_MAX;
GameObjInst* pDst = 0;
// loop through the object instance list to find the smallest particle
for (u32 i = 0; i < GAME_OBJ_INST_NUM_MAX; i++)
{
GameObjInst* pInst = sGameObjInstList + i;
// check if current instance is a red particle
if ((TYPE_PTCL_RED <= pInst->pObject->type) && (pInst->pObject->type <= TYPE_PTCL_WHITE) && (pInst->scale < scaleMin))
{
scaleMin = pInst->scale;
pDst = pInst;
}
}
if (pDst)
{
pDst->pObject = sGameObjList + type;
pDst->type = type;
pDst->score = 0;
pDst->flag = FLAG_ACTIVE;
pDst->life = 1.0f;
pDst->scale = scale;
pDst->posCurr = pPos ? *pPos : zero;
pDst->velCurr = pVel ? *pVel : zero;
pDst->dirCurr = dir;
pDst->parent = parent;
pDst->pUserData = NULL;
// keep track the number of asteroid
if (pDst->pObject->type == TYPE_ASTEROID)
sAstCtr++;
// return the newly created instance
return pDst;
}
}
// cannot find empty slot => return 0
return 0;
}
