From 15740faf9fe9fe4be08965098bbf2947e096aeeb Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Wed, 14 Aug 2019 22:50:43 +0800
Subject: +Unity Runtime code

---
 Runtime/Filters/Misc/TrailRenderer.cpp | 197 +++++++++++++++++++++++++++++++++
 1 file changed, 197 insertions(+)
 create mode 100644 Runtime/Filters/Misc/TrailRenderer.cpp

(limited to 'Runtime/Filters/Misc/TrailRenderer.cpp')

diff --git a/Runtime/Filters/Misc/TrailRenderer.cpp b/Runtime/Filters/Misc/TrailRenderer.cpp
new file mode 100644
index 0000000..c6208ee
--- /dev/null
+++ b/Runtime/Filters/Misc/TrailRenderer.cpp
@@ -0,0 +1,197 @@
+#include "UnityPrefix.h"
+#include "TrailRenderer.h"
+#include "Runtime/Input/TimeManager.h"
+#include "Runtime/Graphics/Transform.h"
+#include "Runtime/Camera/Camera.h"
+#include "Runtime/GameCode/DestroyDelayed.h"
+#include "Runtime/Serialize/TransferFunctions/SerializeTransfer.h"
+#include "Runtime/BaseClasses/IsPlaying.h"
+#include "Runtime/Camera/RenderManager.h"
+#include "Runtime/Shaders/VBO.h"
+#include "Runtime/GfxDevice/GfxDevice.h"
+#include "Runtime/Profiler/Profiler.h"
+
+const float kMinSqrDistance = 0.1f * 0.1f;
+
+IMPLEMENT_CLASS_INIT_ONLY (TrailRenderer)
+IMPLEMENT_OBJECT_SERIALIZE (TrailRenderer)
+
+void TrailRenderer::InitializeClass ()
+{
+	REGISTER_MESSAGE (TrailRenderer, kTransformChanged, TransformChanged, int);
+}
+
+TrailRenderer::TrailRenderer (MemLabelId label, ObjectCreationMode mode)
+:	Super(kRendererTrail, label, mode)
+,	m_TransformChanged(false)
+,	m_WasRendered(false)
+,	m_CurrentLength(0)
+,	m_Time(0)
+,	m_MinVertexDistance(0)
+,	m_Autodestruct(false)
+{
+	m_AABB = MinMaxAABB (Vector3f::zero, Vector3f::zero);
+}
+
+TrailRenderer::~TrailRenderer ()
+{
+}
+
+void TrailRenderer::Reset () {
+	Super::Reset ();
+	m_Colors[0].Set (255,255,255,255);
+	m_Colors[1].Set (255,255,255,255);
+	m_Colors[2].Set (255,255,255,255);
+	m_Colors[3].Set (255,255,255,255);
+	m_Colors[4].Set (255,255,255,0);
+	m_Time = 5.0f;
+	m_TransformChanged = true;
+	m_MinVertexDistance = 0.1F;
+	m_Positions.clear();
+	m_TimeStamps.clear();
+}
+
+void TrailRenderer::UpdateRenderer()
+{
+	Super::UpdateRenderer();
+
+	float now = GetCurTime ();
+	// Remove last vertrices if neccessary
+	while (!m_TimeStamps.empty() && now > m_TimeStamps.back() + m_Time) {
+		m_Positions.pop_back();
+		m_TimeStamps.pop_back();
+	}
+
+	// Add a vertex to the object
+	if (m_TransformChanged) {
+		Vector3f position = GetComponent (Transform).GetPosition ();
+		if( m_Positions.empty () || SqrMagnitude (m_Positions.front () - position) > m_MinVertexDistance*m_MinVertexDistance )
+		{
+			m_Positions.push_front (position);
+			m_TimeStamps.push_front (now);
+		}
+
+		float halfWidth = GetHalfMaxLineWidth ();
+		AABB newPosAABB (m_Positions.front (), Vector3f(halfWidth, halfWidth, halfWidth));
+
+		// Expand the BBox with the new transform position.
+		m_AABB.Encapsulate (newPosAABB);
+		BoundsChanged ();
+	}
+	
+	if (m_Positions.size() < 2) {
+		if (m_Autodestruct && m_WasRendered && IsWorldPlaying ())
+			DestroyObjectDelayed (GetGameObjectPtr());
+	}
+	else
+		m_WasRendered = true;
+
+	// Important: update manager state after calling any SetVisible() above. Fixes an issue
+	// where trails would stop be rendered when object is disabled or stops moving.
+	UpdateManagerState( true );
+	
+	m_TransformChanged = false;
+}
+
+float TrailRenderer::GetHalfMaxLineWidth () const
+{
+	return std::max (m_LineParameters.endWidth, m_LineParameters.startWidth) * 0.5f;
+}
+
+PROFILER_INFORMATION(gTrailRenderProfile, "TrailRenderer.Render", kProfilerRender)
+PROFILER_INFORMATION(gSubmitVBOProfileTrail, "Mesh.SubmitVBO", kProfilerRender)
+
+void TrailRenderer::Render (int materialIndex, const ChannelAssigns& channels)
+{
+	PROFILER_AUTO(gTrailRenderProfile, this)
+
+	int size = m_Positions.size();
+	if( size < 2 )
+		return;
+
+	Vector3f* trailInVerts = NULL;
+	ALLOC_TEMP(trailInVerts, Vector3f, size);
+	int idx = 0;
+	for (std::list<Vector3f>::iterator j = m_Positions.begin(); j != m_Positions.end(); ++j, ++idx)
+	{
+		trailInVerts[idx] = *j;
+	}
+	trailInVerts[0] = GetComponent(Transform).GetPosition();
+	
+	// Get VBO chunk
+	int stripCount = size * 2;
+	GfxDevice& device = GetGfxDevice();
+	DynamicVBO& vbo = device.GetDynamicVBO();
+	LineVertex* vbPtr;
+	if( !vbo.GetChunk( (1<<kShaderChannelVertex) | (1<<kShaderChannelTexCoord0) | (1<<kShaderChannelColor),
+		stripCount, 0,
+		DynamicVBO::kDrawTriangleStrip,
+		(void**)&vbPtr, NULL ) )
+	{
+		return;
+	}
+	
+	// Generate line into the chunk
+	MinMaxAABB aabb;
+	m_LineParameters.outVertices = vbPtr;
+	m_LineParameters.gradient = &m_Colors;
+	m_LineParameters.cameraTransform = GetCurrentCamera().GetWorldToCameraMatrix();	
+	m_LineParameters.outAABB = &aabb;
+	Build3DLine( &m_LineParameters, trailInVerts, size );
+	
+	vbo.ReleaseChunk( stripCount, 0 );
+
+	aabb.Expand (GetHalfMaxLineWidth ());
+
+	if (!CompareMemory (m_AABB, aabb))
+	{
+		m_AABB = aabb;
+		BoundsChanged ();
+	}
+
+	// We can't set the view matrix since that breaks shadow maps (case 490315)
+	// Set the world matrix instead so it cancels out the usual view matrix
+	// i.e. it transforms from camera space back to world space
+	device.SetWorldMatrix(GetCurrentCamera().GetCameraToWorldMatrix().GetPtr());
+
+	if (m_CustomProperties)
+		device.SetMaterialProperties (*m_CustomProperties);
+	
+	PROFILER_BEGIN(gSubmitVBOProfileTrail, this)
+	vbo.DrawChunk (channels);
+	GPU_TIMESTAMP();
+	PROFILER_END
+}
+
+void TrailRenderer::TransformChanged (int changeMask)
+{
+	Renderer::TransformChanged (changeMask);
+	m_TransformChanged = true;
+}
+
+void TrailRenderer::UpdateTransformInfo()
+{
+	const Transform& t = GetComponent (Transform);
+
+	TransformType type = t.CalculateTransformMatrix (m_TransformInfo.worldMatrix);
+	m_TransformInfo.transformType = type;
+	m_TransformInfo.invScale = 1.0f;
+
+	m_TransformInfo.worldAABB = m_AABB;
+	InverseTransformAABB( m_TransformInfo.worldAABB, t.GetPosition(), t.GetRotation(), m_TransformInfo.localAABB );
+}
+
+template<class TransferFunction> inline
+void TrailRenderer::Transfer (TransferFunction& transfer) {
+	Super::Transfer (transfer);
+	transfer.Transfer (m_Time, "m_Time", kSimpleEditorMask);
+	transfer.Transfer (m_LineParameters.startWidth, "m_StartWidth", kSimpleEditorMask);
+	transfer.Transfer (m_LineParameters.endWidth, "m_EndWidth", kSimpleEditorMask);
+	TRANSFER_SIMPLE (m_Colors);
+
+	TRANSFER(m_MinVertexDistance);
+	
+	transfer.Transfer (m_Autodestruct, "m_Autodestruct");
+	if (transfer.IsReading () && !m_Autodestruct)
+		m_WasRendered = false;
+}
-- 
cgit v1.1-26-g67d0