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#include "UnityPrefix.h"
#if ENABLE_TERRAIN && ENABLE_PHYSICS
#include "TerrainCollider.h"
#include "Runtime/Serialize/TransferFunctions/SerializeTransfer.h"
#include "Runtime/Dynamics/PhysicsManager.h"
///@TODO: THis should really only be ITerrain
#include "Runtime/Terrain/TerrainData.h"
#include "Runtime/Terrain/Heightmap.h"
#include "Runtime/Interfaces/ITerrainManager.h"
#include "Runtime/Dynamics/CapsuleCollider.h"
#include "Runtime/BaseClasses/IsPlaying.h"
#include "Runtime/Graphics/Transform.h"
#include "Runtime/Misc/BuildSettings.h"
#include "Runtime/BaseClasses/SupportedMessageOptimization.h"
#include "Runtime/Dynamics/NxWrapperUtility.h"
inline UInt32 GetLowMaterialIndex (UInt32 index)
{
return index & 0x7F;
}
inline UInt32 GetHighMaterialIndex (UInt32 index)
{
return index >> 7;
}
IMPLEMENT_CLASS_HAS_INIT(TerrainCollider)
IMPLEMENT_OBJECT_SERIALIZE(TerrainCollider)
TerrainCollider::TerrainCollider (MemLabelId label, ObjectCreationMode mode)
: Super(label, mode)
, m_Node (this)
{
m_CreateTreeColliders = true;
m_CachedInvSize = Vector3f(1.0F, 1.0F, 1.0F);
}
TerrainCollider::~TerrainCollider ()
{
}
void TerrainCollider::SetTerrainData (PPtr<TerrainData> map)
{
if (m_TerrainData != map)
{
m_TerrainData = map;
Create(NULL);
SetDirty();
}
}
TerrainData* TerrainCollider::GetTerrainData ()
{
return m_TerrainData;
}
void TerrainCollider::Cleanup ()
{
Super::Cleanup();
for (int i=0;i<m_TreeColliders.size();i++)
GetDynamicsScene ().releaseActor (m_TreeColliders[i]->getActor());
m_TreeColliders.clear();
m_Node.RemoveFromList();
}
void TerrainCollider::Create (const Rigidbody* ignoreAttachRigidbody)
{
Cleanup ();
if (!GetTerrainData())
return;
ITerrainManager* terrainManager = GetITerrainManager();
//////@TODO: Make this more directly just return the physx representation...
Heightmap* map = &GetTerrainData()->GetHeightmap();
if (map == NULL || terrainManager->Heightmap_GetNxHeightField(*map) == NULL)
return;
NxHeightFieldShapeDesc desc;
desc.heightField = terrainManager->Heightmap_GetNxHeightField(*map);
if (desc.heightField == NULL)
return;
m_CachedInvSize = Inverse(terrainManager->Heightmap_GetSize(*map));
Vector3f mapScale = map->GetScale ();
desc.heightScale = mapScale.y / (float)(Heightmap::kMaxHeight);
desc.columnScale = mapScale.z;
desc.rowScale = mapScale.x;
desc.holeMaterial = 1;
// Smooth sphere collisions on terrains are much better!
if (IS_CONTENT_NEWER_OR_SAME(kUnityVersion3_2_a1))
desc.meshFlags = NX_MESH_SMOOTH_SPHERE_COLLISIONS;
desc.materialIndexHighBits = GetHighMaterialIndex(terrainManager->Heightmap_GetMaterialIndex(*map));
FinalizeCreate(desc, true, ignoreAttachRigidbody);
if (m_Shape)
{
// Insert into front of terrain colliders. Create() may be called from inside
// of RecreateColliders, and inserting to back will result in eternal loop.
Heightmap::TerrainColliderList& colliders = map->GetTerrainColliders();
colliders.insert(colliders.begin(), m_Node);
}
// Dont create trees in edit mode,its too slow to recreate all those trees when adding new trees
if (m_CreateTreeColliders && IsWorldPlaying())
CreateTrees();
}
void TerrainCollider::CreateTrees ()
{
const float kMinSize = 0.00001F;
int prototypeCount = m_TerrainData->GetTreeDatabase().GetTreePrototypes().size();
const TreePrototype* prototypes = prototypeCount > 0 ? &m_TerrainData->GetTreeDatabase().GetTreePrototypes()[0] : NULL;
int instanceCount = m_TerrainData->GetTreeDatabase().GetInstances().size();
const TreeInstance* instances = instanceCount > 0 ? &m_TerrainData->GetTreeDatabase().GetInstances()[0] : NULL;
int supportedMessages = GetGameObject ().GetSupportedMessages ();
NxActorDesc actorDesc;
NxCapsuleShapeDesc shapeDesc;
actorDesc.userData = NULL;
actorDesc.shapes.push_back (&shapeDesc);
shapeDesc.materialIndex = GetMaterialIndex ();
if (supportedMessages & kHasCollisionStay)
actorDesc.group = kContactTouchGroup;
else if (supportedMessages & (kHasCollisionStay | kHasCollisionEnterExit))
actorDesc.group = kContactEnterExitGroup;
else
actorDesc.group = kContactNothingGroup;
shapeDesc.userData = this;
shapeDesc.group = GetGameObject ().GetLayer ();
Vector3f terrainPositionOffset = GetComponent(Transform).GetPosition();
Vector3f scale = GetITerrainManager()->Heightmap_GetSize(m_TerrainData->GetHeightmap());
NxMat33 id33;
id33.id();
for (int i=0;i<instanceCount;i++)
{
const TreeInstance& instance = instances[i];
if (instance.index >= prototypeCount)
{
ErrorString("Prototype for tree missing.");
continue;
}
const TreePrototype& proto = prototypes[instance.index];
Vector3f pos = Scale(scale, instance.position) + terrainPositionOffset;;
GameObject* prefab = proto.prefab;
if (prefab == NULL)
continue;
CapsuleCollider* capsule = prefab->QueryComponent(CapsuleCollider);
if (capsule == NULL)
continue;
float absoluteHeight = max (Abs (capsule->GetHeight() * instance.heightScale), kMinSize);
float absoluteRadius = Abs (instance.widthScale) * capsule->GetRadius();
float height = absoluteHeight - absoluteRadius * 2.0F;
height = max (height, kMinSize);
absoluteRadius = max (absoluteRadius, kMinSize);
shapeDesc.height = height;
shapeDesc.radius = absoluteRadius;
shapeDesc.group = prefab->GetLayer();
pos += Scale(capsule->GetCenter(), Vector3f(instance.widthScale, instance.heightScale, instance.widthScale));
actorDesc.globalPose = NxMat34(id33, Vec3ToNx(pos ));
NxActor* actor = GetDynamicsScene ().createActor (actorDesc);
if (actor == NULL)
{
ErrorString ("Could not create tree colliders. Maybe there are more Trees then PhysX can handle?");
for (int i=0;i<m_TreeColliders.size();i++)
GetDynamicsScene ().releaseActor (m_TreeColliders[i]->getActor());
m_TreeColliders.clear();
return;
}
NxShape* shape = actor->getShapes ()[0];
m_TreeColliders.push_back(shape);
}
}
template<class TransferFunc>
void TerrainCollider::Transfer (TransferFunc& transfer)
{
Super::Transfer (transfer);
transfer.Align();
TRANSFER(m_TerrainData);
TRANSFER(m_CreateTreeColliders);
}
void TerrainCollider::FetchPoseFromTransform ()
{
NxQuat quat; quat.id();
Vector3f pos = GetComponent(Transform).GetPosition();
NxMat34 shapeMatrix (quat, (const NxVec3&)pos);
m_Shape->setGlobalPose(shapeMatrix);
}
void TerrainCollider::InitializeClass ()
{
REGISTER_MESSAGE (TerrainCollider, kTerrainChanged, TerrainChanged, int);
}
void TerrainCollider::TransformChanged (int changeMask)
{
Super::TransformChanged(changeMask);
if (m_Shape)
FetchPoseFromTransform ();
}
void TerrainCollider::TerrainChanged (int changeMask)
{
if (changeMask == TerrainData::kWillBeDestroyed)
Cleanup();
}
#endif
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