動的オブジェクトを挿入する処理
obj->work = x + E_LENGTH/2 - x % E_LENGTH +
y + E_LENGTH/2 - y % E_LENGTH +
z + E_LENGTH/2 - z % E_LENGTH;

obj->px = 640/2-2*E_LENGTH + 2*(obj->x - obj->y);
obj->py = 480/2 + E_LENGTH + obj->x + obj->y - 2*obj->z;

drawObjNode *temp, *last=NULL;
for(temp = map->first; temp != NULL; temp = temp->next){
if(temp->work >= obj->work && temp->py > obj->py){
obj->next = temp;
if(last) last->next = obj;
else map->first = obj;
break;
}
last = temp;
}

if(temp == NULL){
last->next = obj;
obj->next = NULL;
}

アプリ↓
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