1 files changed, 441 insertions, 0 deletions
diff --git a/Runtime/Physics2D/Collider2D.cpp b/Runtime/Physics2D/Collider2D.cpp
new file mode 100644
index 0000000..9e34e60
--- /dev/null
+++ b/Runtime/Physics2D/Collider2D.cpp
@@ -0,0 +1,441 @@
+#include "UnityPrefix.h"
+
+#if ENABLE_2D_PHYSICS
+#include "Runtime/Physics2D/Collider2D.h"
+#include "Runtime/Physics2D/RigidBody2D.h"
+#include "Runtime/Physics2D/Physics2DManager.h"
+#include "Runtime/Physics2D/Physics2DSettings.h"
+#include "Runtime/Physics2D/Physics2DMaterial.h"
+#include "Runtime/Graphics/Transform.h"
+#include "Runtime/Serialize/TransferFunctions/SerializeTransfer.h"
+#include "Runtime/Profiler/Profiler.h"
+#include "Runtime/Utilities/Utility.h"
+
+
+PROFILER_INFORMATION(gPhysics2DProfileColliderCleanup, "Physics2D.ColliderCleanup", kProfilerPhysics)
+PROFILER_INFORMATION(gPhysics2DProfileColliderShapeGeneration, "Physics2D.ColliderShapeGeneration", kProfilerPhysics)
+PROFILER_INFORMATION(gPhysics2DProfileColliderTransformChanged, "Physics2D.ColliderTransformChanged", kProfilerPhysics)
+PROFILER_INFORMATION(gPhysics2DProfileColliderTransformParentChanged, "Physics2D.ColliderTransformParentChanged", kProfilerPhysics)
+PROFILER_INFORMATION(gPhysics2DProfileColliderTransformScaleChanged, "Physics2D.ColliderTransformScaleChanged", kProfilerPhysics)
+PROFILER_INFORMATION(gPhysics2DProfileColliderTransformPositionRotationChanged, "Physics2D.ColliderTransformPositionRotationChanged", kProfilerPhysics)
+
+
+IMPLEMENT_CLASS_HAS_INIT (Collider2D)
+IMPLEMENT_OBJECT_SERIALIZE (Collider2D)
+INSTANTIATE_TEMPLATE_TRANSFER (Collider2D)
+
+// --------------------------------------------------------------------------
+
+
+Collider2D::Collider2D (MemLabelId label, ObjectCreationMode mode)
+:	Super(label, mode)
+,	m_IsTrigger(false)
+,	m_IsStaticBody(false)
+,	m_LocalTransformInitialized(false)
+{
+}
+
+
+Collider2D::~Collider2D ()
+{
+	Cleanup ();
+}
+
+
+void Collider2D::InitializeClass ()
+{
+	REGISTER_MESSAGE (Collider2D, kTransformChanged, TransformChanged, int);
+}
+
+
+template<class TransferFunction>
+void Collider2D::Transfer (TransferFunction& transfer) 
+{
+	Super::Transfer (transfer);
+
+	TRANSFER(m_Material);
+	transfer.Transfer (m_IsTrigger, "m_IsTrigger");
+	transfer.Align();
+}
+
+
+void Collider2D::Reset ()
+{
+	Super::Reset ();
+
+	m_Material = 0;
+	m_IsTrigger = false;
+}
+
+
+void Collider2D::AwakeFromLoad(AwakeFromLoadMode awakeMode)
+{
+	Super::AwakeFromLoad (awakeMode);
+
+	// Ignore if not active.
+	if (!IsActive())
+		return;
+
+	// (Re)create collider if appropriate.
+	Create ();
+}
+
+
+void Collider2D::Deactivate (DeactivateOperation operation)
+{
+	Super::Deactivate (operation);
+	Cleanup ();
+
+	// Destroy collider collisions immediately.
+	GetPhysics2DManager().DestroyColliderCollisions (this);
+}
+
+
+void Collider2D::Cleanup ()
+{
+	PROFILER_AUTO(gPhysics2DProfileColliderCleanup, NULL)
+
+	// Process any shapes.
+	if (m_Shapes.size() > 0)
+	{
+		if (m_IsStaticBody)
+		{
+			// Destroy the fixtures
+			b2Body* groundBody = GetPhysicsGroundBody ();
+			for (int i = 0; i < m_Shapes.size(); ++i)
+				groundBody->DestroyFixture(m_Shapes[i]);
+		}
+		else
+		{
+			Rigidbody2D* rigidBody = GetRigidbody();
+			if (rigidBody)
+			{
+				// Destroy the fixtures.
+				b2Body* body = rigidBody->GetBody ();
+				for (int i = 0; i < m_Shapes.size(); ++i)
+					body->DestroyFixture(m_Shapes[i]);
+
+				// Recalculate the collider body-mass.
+				rigidBody->CalculateColliderBodyMass ();
+			}
+		}
+
+		m_Shapes.clear();
+
+		// Invalidate any persisted contact information.
+		GetPhysics2DManager().InvalidateColliderCollisions (this);
+	}
+
+	m_IsStaticBody = false;
+}
+
+
+void Collider2D::RecreateCollider (const Rigidbody2D* ignoreRigidbody)
+{
+	if (IsActive () && GetEnabled())
+		Create (ignoreRigidbody);
+	else
+		Cleanup ();
+}
+
+
+void Collider2D::AddToManager ()
+{
+	// Create the collider if not already created.
+	if (m_Shapes.size() == 0)
+		Create ();
+}
+
+
+void Collider2D::RemoveFromManager ()
+{
+	// Destroy the collider.
+	Cleanup ();
+}
+
+
+void Collider2D::SetIsTrigger (bool trigger)
+{
+	// Finish if no change.
+	if (m_IsTrigger == trigger)
+		return;
+
+	m_IsTrigger = trigger;
+
+	SetDirty();
+
+	if (IsActive () && GetEnabled())
+		Create ();
+}
+
+
+PPtr<PhysicsMaterial2D> Collider2D::GetMaterial ()
+{
+	return m_Material;
+}
+
+
+void Collider2D::SetMaterial (PPtr<PhysicsMaterial2D> material)
+{
+	if (m_Material == material)
+		return;
+
+	SetDirty ();
+	m_Material = material;
+}
+
+
+Rigidbody2D* Collider2D::GetRigidbody ()
+{
+	// Finish if a static body or no shapes.
+	if (m_IsStaticBody || m_Shapes.size() == 0)
+		return NULL;
+
+	// Fetch body from first shape.
+	b2Body* body = m_Shapes[0]->GetBody();
+
+	if (!body)
+		return NULL;
+
+	return (Rigidbody2D*)body->GetUserData();
+}
+
+
+bool Collider2D::OverlapPoint (const Vector2f& point) const
+{
+	// Cannot perform query if not active.
+	if (!IsActive ())
+		return false;
+
+	const b2Vec2 testPoint(point.x, point.y);
+
+	// Test all fixtures for the point.
+	for (FixtureArray::const_iterator fixtureItr = m_Shapes.begin (); fixtureItr != m_Shapes.end (); ++fixtureItr)
+	{
+		if ((*fixtureItr)->TestPoint (testPoint))
+			return true;
+	}
+
+	return false;
+}
+
+
+void Collider2D::TransformChanged (int changeMask)
+{
+	PROFILER_AUTO(gPhysics2DProfileColliderTransformChanged, NULL)
+
+	// Finish if transform message is disabled.
+	if (!GetPhysics2DManager().IsTransformMessageEnabled())
+		return;
+
+	// Recreate the collider if the parent body has changed.
+	if (changeMask & Transform::kParentingChanged)
+	{
+		PROFILER_AUTO(gPhysics2DProfileColliderTransformParentChanged, NULL)
+
+		Rigidbody2D* currentBody = GetRigidbody();
+		Rigidbody2D* newBody = Rigidbody2D::FindRigidbody (GetGameObjectPtr());
+		if (newBody != currentBody)
+		{
+			Create();
+			return;
+		}
+	}
+
+	// Recreate the collider if the scale has changed.
+	if (changeMask & Transform::kScaleChanged)
+	{
+		PROFILER_AUTO(gPhysics2DProfileColliderTransformScaleChanged, NULL)
+
+		Create();
+		return;
+	}
+
+	// Recreate the collider if the position or rotation has changed.
+	if (changeMask & (Transform::kPositionChanged | Transform::kRotationChanged))
+	{
+		PROFILER_AUTO(gPhysics2DProfileColliderTransformPositionRotationChanged, NULL)
+
+		// Always recreate static bodies but only recreate non-static bodies if the rigid-body exists
+		// on a parent GameObject i.e. this is a compound object.
+		if (!m_IsStaticBody && (QueryComponent (Rigidbody2D) != NULL || !HasLocalTransformChanged ()))
+			return;
+
+		Create();
+	}
+}
+
+
+// --------------------------------------------------------------------------
+
+
+void Collider2D::FinalizeCreate(b2FixtureDef& def, b2Body* body, const dynamic_array<b2Shape*>* shapes)
+{
+	Assert (m_Shapes.size() == 0);
+
+	PROFILER_AUTO(gPhysics2DProfileColliderShapeGeneration, NULL)
+
+	// Don't create the collider if not active and enabled.
+	if (!(IsActive () && GetEnabled ()))
+		return;
+
+	// Initialize fixture definition.
+	if (m_Material.IsNull ())
+	{
+		PhysicsMaterial2D* defaultMaterial = GetPhysics2DSettings ().GetDefaultPhysicsMaterial ();
+		if (defaultMaterial != NULL )
+		{
+			def.friction = defaultMaterial->GetFriction ();
+			def.restitution = defaultMaterial->GetBounciness ();
+		}
+		else
+		{
+			def.friction = 0.4f;
+			def.restitution = 0.0f;
+		}
+	}
+	else
+	{
+		def.friction = m_Material->GetFriction();
+		def.restitution = m_Material->GetBounciness();
+	}
+	def.density = 1.0f;	// Body mass is calculated based upon a mass calculation of each shape unit-density.
+	def.userData = this;
+	def.isSensor = m_IsTrigger;	
+
+	// Fetch the associated rigid-body.
+	// NOTE: There won't be one if the body is the ground-body!
+	Rigidbody2D* rigidBody = (Rigidbody2D*)body->GetUserData ();
+
+	// Do we have any shapes?
+	if (shapes)
+	{
+		// Yes, so add shape to existing set.
+		const int shapeCount = shapes->size();
+
+		Assert(shapeCount > 0);
+		Assert(def.shape == 0);
+
+		m_Shapes.resize_uninitialized(shapeCount);
+		for (int i = 0; i < shapeCount; ++i)
+		{
+			b2FixtureDef prototype = def;
+			prototype.shape = (*shapes)[i];
+			m_Shapes[i] = body->CreateFixture(&prototype);
+		}
+	}
+	else
+	{
+		// No, so add new shape to set.
+		m_Shapes.resize_uninitialized(1);
+		m_Shapes[0] = body->CreateFixture(&def);
+	}
+
+	// Calculate the collider body mass.
+	if (rigidBody != NULL)
+		rigidBody->CalculateColliderBodyMass ();
+
+	// Update the local transform.
+	UpdateLocalTransform ();
+}
+
+
+void Collider2D::CalculateColliderTransformation (const Rigidbody2D* ignoreRigidbody, b2Body** attachedBody, Matrix4x4f& matrix)
+{
+	// Fetch the transform.
+	const Transform& transform = GetComponent(Transform);
+
+	// Do we have a rigid-body on the same game object?
+	Rigidbody2D* rigidBody = QueryComponent (Rigidbody2D);
+	if (rigidBody && rigidBody != ignoreRigidbody && rigidBody->IsActive () && rigidBody->GetBody () != NULL)
+	{
+		// Yes, so no transformation.
+		matrix.SetIdentity();
+
+		// Ensure the rigid-body is available.
+		Assert (rigidBody->GetBody() != NULL);
+
+		// Set attached body.
+		*attachedBody = rigidBody->GetBody();
+
+		// Flag as non-static.
+		m_IsStaticBody = false;
+
+		return;
+	}
+
+	// Find valid rigid-body parent transform.
+	Transform* parentTransform = transform.GetParent ();
+
+	while(parentTransform)
+	{
+		// Fetch the grandparent transform.
+		Transform* grandParentTransform = parentTransform->GetParent ();
+
+		// Fetch the parent game object.
+		GameObject* go = parentTransform->GetGameObjectPtr ();
+		if (go)
+		{
+			// Fetch any rigid-body.
+			rigidBody = go->QueryComponent (Rigidbody2D);
+
+			// Is the rigid-body valid or we're at the transform root?
+			if (rigidBody && rigidBody != ignoreRigidbody && rigidBody->IsActive () && rigidBody->GetBody () != NULL)
+			{
+				// Yes, so calculate its relative transformation.
+				Vector3f childPosition = transform.GetPosition ();
+				Quaternionf childRotation = transform.GetRotation ();
+				Matrix4x4f childMatrix, parentMatrix;	
+				childMatrix.SetTR (childPosition, childRotation);
+				parentMatrix = parentTransform->GetWorldToLocalMatrixNoScale ();
+				MultiplyMatrices4x4 (&parentMatrix, &childMatrix, &matrix);
+
+				// Ensure the rigid-body is available.
+				Assert (rigidBody->GetBody() != NULL);
+
+				// Set attached body.
+				*attachedBody = rigidBody->GetBody();
+
+				// Flag as non-static.
+				m_IsStaticBody = false;
+
+				return;
+			}
+		}
+
+		// Move up hierarchy.
+		parentTransform = grandParentTransform;
+	}
+
+	// Fetch the transformation from the origin (ground-body position).
+	matrix = transform.GetLocalToWorldMatrixNoScale();
+
+	// Set attached body (ground-body).
+	*attachedBody = GetPhysicsGroundBody();
+	
+	// Flag as static.
+	m_IsStaticBody = true;
+}
+
+
+bool Collider2D::HasLocalTransformChanged () const
+{
+	// Fetch the transform.
+	const Transform& transform = GetComponent(Transform);
+
+	return !m_LocalTransformInitialized || m_LocalPosition != transform.GetLocalPosition () ||	m_LocalRotation != transform.GetLocalRotation ();
+}
+
+
+void Collider2D::UpdateLocalTransform ()
+{
+	// Fetch the transform.
+	const Transform& transform = GetComponent(Transform);
+
+	m_LocalPosition = transform.GetLocalPosition ();
+	m_LocalRotation = transform.GetLocalRotation ();
+	m_LocalTransformInitialized = true;
+}
+
+
+#endif // #if ENABLE_2D_PHYSICS