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/* Copyright (C) 2023 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "precompiled.h"
#include "Unit.h"
#include "graphics/Model.h"
#include "graphics/ObjectBase.h"
#include "graphics/ObjectEntry.h"
#include "graphics/ObjectManager.h"
#include "graphics/SkeletonAnim.h"
#include "graphics/SkeletonAnimDef.h"
#include "graphics/UnitAnimation.h"
#include "ps/CLogger.h"
CUnit::CUnit(CObjectManager& objectManager, const CActorDef& actor, const entity_id_t id, const uint32_t seed)
: m_ObjectManager(objectManager), m_Actor(actor), m_ID(id), m_Seed(seed), m_Animation(nullptr)
{
/**
* When entity selections change, we might end up with a different layout in terms of variants/groups,
* which means the random key calculation might end up with different results for the same seed.
* This is bad, as it means entities randomly change appearence when changing e.g. animation.
* To fix this, we'll initially pick a random and complete specification based on our seed,
* and then pass that as the lowest priority selections. Thus, if the actor files are properly specified,
* we can ensure that the entities will look the same no matter what happens.
*/
SetActorSelections(m_Actor.PickSelectionsAtRandom(m_Seed)); // Calls ReloadObject().
}
CUnit::~CUnit()
{
delete m_Animation;
}
std::unique_ptr<CUnit> CUnit::Create(const CStrW& actorName, const entity_id_t id, const uint32_t seed, CObjectManager& objectManager)
{
auto [success, actor] = objectManager.FindActorDef(actorName);
UNUSED2(success);
std::unique_ptr<CUnit> unit{new CUnit(objectManager, actor, id, seed)};
if (!unit->m_Model)
return nullptr;
return unit;
}
void CUnit::UpdateModel(float frameTime)
{
if (m_Animation)
m_Animation->Update(frameTime*1000.0f);
}
void CUnit::SetEntitySelection(const CStr& key, const CStr& selection)
{
CStr selection_lc = selection.LowerCase();
if (m_EntitySelections[key] == selection_lc)
return;
m_EntitySelections[key] = selection_lc;
ReloadObject();
}
void CUnit::SetEntitySelection(const std::map<CStr, CStr>& selections)
{
for (const std::pair<const CStr, CStr>& s : selections)
m_EntitySelections[s.first] = s.second.LowerCase();
ReloadObject();
}
void CUnit::SetActorSelections(const std::set<CStr>& selections)
{
m_ActorSelections = selections;
ReloadObject();
}
void CUnit::ReloadObject()
{
std::set<CStr> entitySelections;
for (const std::pair<const CStr, CStr>& selection : m_EntitySelections)
entitySelections.insert(selection.second);
std::vector<std::set<CStr>> selections;
selections.push_back(entitySelections);
selections.push_back(m_ActorSelections);
// randomly select any remain selections necessary to completely identify a variation (e.g., the new selection
// made might define some additional props that require a random variant choice). Also, FindObjectVariation
// expects the selectors passed to it to be complete.
// see https://gitea.wildfiregames.com/0ad/0ad/issues/979
// If these selections give a different object, change this unit to use it
// Use the entity ID as randomization seed (same as when the unit was first created)
CObjectEntry* newObject = m_ObjectManager.FindObjectVariation(&m_Actor, selections, m_Seed);
if (!newObject)
{
LOGERROR("Error loading object variation (actor: %s)", m_Actor.GetPathname().string8());
// Don't delete the unit, don't override our current (valid) state.
return;
}
if (!m_Object)
{
m_Object = newObject;
m_Model = newObject->m_Model->Clone();
if (m_Model->ToCModel())
m_Animation = new CUnitAnimation(m_ID, m_Model->ToCModel(), m_Object);
}
else if (m_Object && newObject != m_Object)
{
// Clone the new object's base (non-instance) model
std::unique_ptr<CModelAbstract> newModel = newObject->m_Model->Clone();
// Copy the old instance-specific settings from the old model to the new instance
newModel->SetTransform(m_Model->GetTransform());
newModel->SetPlayerID(m_Model->GetPlayerID());
if (newModel->ToCModel() && m_Model->ToCModel())
{
newModel->ToCModel()->CopyAnimationFrom(m_Model->ToCModel());
// Copy flags that belong to this model instance (not those defined by the actor XML)
int instanceFlags = (ModelFlag::SILHOUETTE_DISPLAY | ModelFlag::SILHOUETTE_OCCLUDER | ModelFlag::IGNORE_LOS) & m_Model->ToCModel()->GetFlags();
newModel->ToCModel()->AddFlagsRec(instanceFlags);
}
m_Model = std::move(newModel);
m_Object = newObject;
if (m_Model->ToCModel())
{
if (m_Animation)
m_Animation->ReloadUnit(m_Model->ToCModel(), m_Object); // TODO: maybe this should try to preserve animation state?
else
m_Animation = new CUnitAnimation(m_ID, m_Model->ToCModel(), m_Object);
}
else
{
SAFE_DELETE(m_Animation);
}
}
}
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