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DarkflameServer/dGame/dComponents/PhysicsComponent.cpp
Aaron Kimbrell 62f5f13846 feat(physics): simple and phantom physics objects register as movement blockers 
A fixed simple physics object, or a phantom volume, that its data marks as a
wall for enemies (a navmesh carver, or solid with a group only enemies touch)
adds its shape to the world's movement blockers, and takes it out again when it
goes away. Only shapes the server knows are used; an unknown asset's stand in
cube would be a guess, so it is logged and left out.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-29 17:52:02 -05:00

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#include "PhysicsComponent.h"
#include <algorithm>
#include <cctype>
#include "eReplicaComponentType.h"
#include "NiPoint3.h"
#include "NiQuaternion.h"
#include "CDComponentsRegistryTable.h"
#include "CDPhysicsComponentTable.h"
#include "dpEntity.h"
#include "dpWorld.h"
#include "dpMovementBlockers.h"
#include "dpShapeBox.h"
#include "dpShapeSphere.h"
#include "EntityInfo.h"
#include "Amf3.h"
#include "Entity.h"
#include "Logger.h"
PhysicsComponent::PhysicsComponent(Entity* parent, const int32_t componentID) : Component(parent, componentID) {
m_Position = NiPoint3Constant::ZERO;
m_Rotation = QuatUtils::IDENTITY;
m_DirtyPosition = false;
CDPhysicsComponentTable* physicsComponentTable = CDClientManager::GetTable<CDPhysicsComponentTable>();
if (physicsComponentTable) {
auto* info = physicsComponentTable->GetByID(componentID);
if (info) {
m_CollisionGroup = info->collisionGroup;
}
}
if (m_Parent->HasVar(u"CollisionGroupID")) m_CollisionGroup = m_Parent->GetVar<int32_t>(u"CollisionGroupID");
RegisterMsg(&PhysicsComponent::OnGetPosition);
}
PhysicsComponent::~PhysicsComponent() {
if (!m_MovementBlocker) return;
dpWorld::RemoveMovementBlocker(m_MovementBlocker);
delete m_MovementBlocker;
}
void PhysicsComponent::RegisterMovementBlocker(const eReplicaComponentType type, const bool solid, const float scale) {
if (m_MovementBlocker) return;
const auto filter = dpMovementBlockers::BlockingFilter(m_Parent->GetVar<bool>(u"navmesh_carver"), solid, static_cast<uint32_t>(m_CollisionGroup));
if (!filter) return;
// Some shapes move the object's position to line up with the client's; that is for the shape only
const auto placed = m_Position;
bool isFallback = false;
auto* const blocker = CreatePhysicsEntity(type, &isFallback);
const auto shapePosition = m_Position;
m_Position = placed;
if (!blocker) return;
if (isFallback) {
LOG_DEBUG("%llu (LOT %i) should block movement, but the server doesn't know its shape", m_Parent->GetObjectID(), m_Parent->GetLOT());
delete blocker;
return;
}
blocker->SetScale(scale);
blocker->SetRotation(m_Rotation);
blocker->SetPosition(shapePosition);
m_MovementBlocker = blocker;
dpWorld::AddMovementBlocker(m_MovementBlocker, *filter);
}
bool PhysicsComponent::OnGetPosition(GameMessages::GetPosition& msg) {
msg.pos = GetPosition();
return true;
}
void PhysicsComponent::Serialize(RakNet::BitStream& outBitStream, bool bIsInitialUpdate) {
outBitStream.Write(bIsInitialUpdate || m_DirtyPosition);
if (bIsInitialUpdate || m_DirtyPosition) {
outBitStream.Write(m_Position.x);
outBitStream.Write(m_Position.y);
outBitStream.Write(m_Position.z);
outBitStream.Write(m_Rotation.x);
outBitStream.Write(m_Rotation.y);
outBitStream.Write(m_Rotation.z);
outBitStream.Write(m_Rotation.w);
if (!bIsInitialUpdate) m_DirtyPosition = false;
}
}
dpEntity* PhysicsComponent::CreatePhysicsEntity(eReplicaComponentType type, bool* isFallback) {
if (isFallback) *isFallback = false;
CDComponentsRegistryTable* compRegistryTable = CDClientManager::GetTable<CDComponentsRegistryTable>();
auto componentID = compRegistryTable->GetByIDAndType(m_Parent->GetLOT(), type);
CDPhysicsComponentTable* physComp = CDClientManager::GetTable<CDPhysicsComponentTable>();
if (physComp == nullptr) return nullptr;
auto* info = physComp->GetByID(componentID);
if (info == nullptr || info->physicsAsset == "" || info->physicsAsset == "NO_PHYSICS") return nullptr;
// The file name alone, in lower case: some assets are named by another folder, or case, than the file has
const auto slash = info->physicsAsset.find_last_of("\\/");
auto assetFile = info->physicsAsset.substr(slash == std::string::npos ? 0 : slash + 1);
std::ranges::transform(assetFile, assetFile.begin(), [](const unsigned char c) { return static_cast<char>(std::tolower(c)); });
dpEntity* toReturn;
if (info->physicsAsset == "miscellaneous\\misc_phys_10x1x5.hkx") {
toReturn = new dpEntity(m_Parent->GetObjectID(), 10.0f, 5.0f, 1.0f);
} else if (info->physicsAsset == "miscellaneous\\misc_phys_640x640.hkx") {
// TODO Fix physics simulation to do simulation at high velocities due to bullet through paper problem...
toReturn = new dpEntity(m_Parent->GetObjectID(), 1638.4f, 13.521004f * 2.0f, 1638.4f);
// Move this down by 13.521004 units so it is still effectively at the same height as before
m_Position = m_Position - NiPoint3Constant::UNIT_Y * 13.521004f;
} else if (info->physicsAsset == "env\\trigger_wall_tall.hkx") {
toReturn = new dpEntity(m_Parent->GetObjectID(), 10.0f, 25.0f, 1.0f);
} else if (info->physicsAsset == "env\\env_gen_placeholderphysics.hkx") {
toReturn = new dpEntity(m_Parent->GetObjectID(), 20.0f, 20.0f, 20.0f);
} else if (assetFile == "poi_trigger_wall.hkx") {
// test\POI_trigger_wall.hkx in the CDClient (e.g. "Clear threat list Trigger Wall"), env\ in the client's files:
// a box 1 wide, 12.98 tall from its base and 20.45 deep
toReturn = new dpEntity(m_Parent->GetObjectID(), 1.0f, 12.9755f, 20.45f);
} else if (assetFile == "trigger_rectangle_box.hkx") {
// "Trigger Rectangle Box": a box 8 wide, 8 tall from its base and 4 deep
toReturn = new dpEntity(m_Parent->GetObjectID(), 8.0f, 8.0f, 4.0f);
} else if (info->physicsAsset == "env\\NG_NinjaGo\\env_ng_gen_gate_chamber_puzzle_ceiling_tile_falling_phantom.hkx") {
toReturn = new dpEntity(m_Parent->GetObjectID(), 18.0f, 5.0f, 15.0f);
m_Position += QuatUtils::Forward(m_Rotation) * 7.5f;
} else if (info->physicsAsset == "env\\NG_NinjaGo\\ng_flamejet_brick_phantom.HKX") {
toReturn = new dpEntity(m_Parent->GetObjectID(), 1.0f, 1.0f, 12.0f);
m_Position += QuatUtils::Forward(m_Rotation) * 6.0f;
} else if (info->physicsAsset == "env\\Ring_Trigger.hkx") {
toReturn = new dpEntity(m_Parent->GetObjectID(), 6.0f, 6.0f, 6.0f);
} else if (info->physicsAsset == "env\\vfx_propertyImaginationBall.hkx") {
toReturn = new dpEntity(m_Parent->GetObjectID(), 4.5f);
} else if (info->physicsAsset == "env\\env_won_fv_gas-blocking-volume.hkx") {
toReturn = new dpEntity(m_Parent->GetObjectID(), 390.496826f, 111.467964f, 600.821534f, true);
m_Position.y -= (111.467964f * m_Parent->GetDefaultScale()) / 2;
// Leaving these out for now since they cause more issues than they solve in racing tracks without proper OBB checks.
} /* else if (info->physicsAsset == "env\\GFTrack_DeathVolume1_CaveExit.hkx") {
toReturn = new dpEntity(m_Parent->GetObjectID(), 112.416870f, 50.363434f, 87.679268f);
} else if (info->physicsAsset == "env\\GFTrack_DeathVolume2_RoadGaps.hkx") {
toReturn = new dpEntity(m_Parent->GetObjectID(), 48.386536f, 50.363434f, 259.361755f);
} */ else {
// LOG_DEBUG("This one is supposed to have %s", info->physicsAsset.c_str());
//add fallback cube:
toReturn = new dpEntity(m_Parent->GetObjectID(), 2.0f, 2.0f, 2.0f);
if (isFallback) *isFallback = true;
}
// Only touch what the client lets this group touch (e.g. POI walls ignore enemies, threat clearing walls ignore players)
toReturn->SetCollisionGroup(static_cast<uint32_t>(m_CollisionGroup));
return toReturn;
}
dpEntity* PhysicsComponent::CreatePhysicsLnv(const float scale, const eReplicaComponentType type) const {
int pcShapeType = -1;
float x = 0.0f;
float y = 0.0f;
float z = 0.0f;
float width = 0.0f; //aka "radius"
float height = 0.0f;
dpEntity* toReturn = nullptr;
if (m_Parent->HasVar(u"primitiveModelType")) {
pcShapeType = m_Parent->GetVar<int32_t>(u"primitiveModelType");
x = m_Parent->GetVar<float>(u"primitiveModelValueX");
y = m_Parent->GetVar<float>(u"primitiveModelValueY");
z = m_Parent->GetVar<float>(u"primitiveModelValueZ");
} else {
CDComponentsRegistryTable* compRegistryTable = CDClientManager::GetTable<CDComponentsRegistryTable>();
auto componentID = compRegistryTable->GetByIDAndType(m_Parent->GetLOT(), type);
CDPhysicsComponentTable* physComp = CDClientManager::GetTable<CDPhysicsComponentTable>();
if (physComp == nullptr) return nullptr;
auto info = physComp->GetByID(componentID);
if (info == nullptr) return nullptr;
pcShapeType = info->pcShapeType;
width = info->playerRadius;
height = info->playerHeight;
}
switch (pcShapeType) {
case 0: { // HKX type
break;
}
case 1: { //Make a new box shape
NiPoint3 boxSize(x, y, z);
if (x == 0.0f) {
//LU has some weird values, so I think it's best to scale them down a bit
if (height < 0.5f) height = 2.0f;
if (width < 0.5f) width = 2.0f;
//Scale them:
width = width * scale;
height = height * scale;
boxSize = NiPoint3(width, height, width);
}
toReturn = new dpEntity(m_Parent->GetObjectID(), boxSize);
toReturn->SetPosition({ m_Position.x, m_Position.y - (height / 2), m_Position.z });
break;
}
case 2: { //Make a new cylinder shape
break;
}
case 3: { //Make a new sphere shape
auto [x, y, z] = m_Position;
toReturn = new dpEntity(m_Parent->GetObjectID(), width);
toReturn->SetPosition({ x, y, z });
break;
}
case 4: { //Make a new capsule shape
break;
}
}
if (toReturn) {
toReturn->SetCollisionGroup(static_cast<uint32_t>(m_CollisionGroup));
dpWorld::AddEntity(toReturn);
}
return toReturn;
}
void PhysicsComponent::SpawnVertices(dpEntity* entity) const {
if (!entity) return;
LOG("Spawning vertices for %llu", m_Parent->GetObjectID());
EntityInfo info;
info.lot = 33;
info.spawner = nullptr;
info.spawnerID = m_Parent->GetObjectID();
info.spawnerNodeID = 0;
// These don't use overloaded methods as dPhysics does not link with dGame at the moment.
auto box = dynamic_cast<dpShapeBox*>(entity->GetShape());
if (box) {
for (auto vert : box->GetVertices()) {
LOG("Vertex at %f, %f, %f", vert.x, vert.y, vert.z);
info.pos = vert;
Entity* newEntity = Game::entityManager->CreateEntity(info);
Game::entityManager->ConstructEntity(newEntity);
}
}
auto sphere = dynamic_cast<dpShapeSphere*>(entity->GetShape());
if (sphere) {
auto [x, y, z] = entity->GetPosition(); // Use shapes position instead of the parent's position in case it's different
float plusX = x + sphere->GetRadius();
float minusX = x - sphere->GetRadius();
float plusY = y + sphere->GetRadius();
float minusY = y - sphere->GetRadius();
float plusZ = z + sphere->GetRadius();
float minusZ = z - sphere->GetRadius();
auto radius = sphere->GetRadius();
LOG("Radius: %f", radius);
LOG("Plus Vertices %f %f %f", plusX, plusY, plusZ);
LOG("Minus Vertices %f %f %f", minusX, minusY, minusZ);
info.pos = NiPoint3{ x, plusY, z };
Entity* newEntity = Game::entityManager->CreateEntity(info);
Game::entityManager->ConstructEntity(newEntity);
info.pos = NiPoint3{ x, minusY, z };
newEntity = Game::entityManager->CreateEntity(info);
Game::entityManager->ConstructEntity(newEntity);
info.pos = NiPoint3{ plusX, y, z };
newEntity = Game::entityManager->CreateEntity(info);
Game::entityManager->ConstructEntity(newEntity);
info.pos = NiPoint3{ minusX, y, z };
newEntity = Game::entityManager->CreateEntity(info);
Game::entityManager->ConstructEntity(newEntity);
info.pos = NiPoint3{ x, y, plusZ };
newEntity = Game::entityManager->CreateEntity(info);
Game::entityManager->ConstructEntity(newEntity);
info.pos = NiPoint3{ x, y, minusZ };
newEntity = Game::entityManager->CreateEntity(info);
Game::entityManager->ConstructEntity(newEntity);
info.pos = NiPoint3{ x, y, z };
newEntity = Game::entityManager->CreateEntity(info);
Game::entityManager->ConstructEntity(newEntity);
}
}
bool PhysicsComponent::OnGetObjectReportInfo(GameMessages::GetObjectReportInfo& reportInfo) {
auto& info = reportInfo.info->PushDebug("Physics");
reportInfo.subCategory = &info;
auto& pos = info.PushDebug("Position").PushDebug(m_Position);
auto& rot = info.PushDebug("Rotation").PushDebug(m_Rotation);
info.PushDebug<AMFIntValue>("Collision Group") = m_CollisionGroup;
return true;
}
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