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

---
 .../ParticleSystem/Modules/VelocityModule.cpp      | 127 +++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 Runtime/Graphics/ParticleSystem/Modules/VelocityModule.cpp

(limited to 'Runtime/Graphics/ParticleSystem/Modules/VelocityModule.cpp')

diff --git a/Runtime/Graphics/ParticleSystem/Modules/VelocityModule.cpp b/Runtime/Graphics/ParticleSystem/Modules/VelocityModule.cpp
new file mode 100644
index 0000000..edb7ed9
--- /dev/null
+++ b/Runtime/Graphics/ParticleSystem/Modules/VelocityModule.cpp
@@ -0,0 +1,127 @@
+#include "UnityPrefix.h"
+#include "VelocityModule.h"
+#include "Runtime/BaseClasses/ObjectDefines.h"
+#include "Runtime/Serialize/TransferFunctions/SerializeTransfer.h"
+#include "../ParticleSystemUtils.h"
+#include "Runtime/Math/Random/Random.h"
+#include "Runtime/Math/Matrix4x4.h"
+
+template<ParticleSystemCurveEvalMode mode>
+void UpdateTpl(const MinMaxCurve& x, const MinMaxCurve& y, const MinMaxCurve& z, ParticleSystemParticles& ps, const size_t fromIndex, const size_t toIndex, bool transform, const Matrix4x4f& matrix)
+{
+	for (size_t q = fromIndex; q < toIndex; ++q)
+	{
+		Vector3f random;
+		GenerateRandom3(random, ps.randomSeed[q] + kParticleSystemVelocityCurveId);
+
+		const float normalizedTime = NormalizedTime (ps, q);
+		Vector3f vel = Vector3f (Evaluate<mode> (x, normalizedTime, random.x), Evaluate<mode> (y, normalizedTime, random.y), Evaluate<mode> (z, normalizedTime, random.z));
+		if(transform)
+			vel = matrix.MultiplyVector3 (vel);
+		ps.animatedVelocity[q] += vel;
+	}
+}
+
+template<bool isOptimized>
+void UpdateProceduralTpl(const DualMinMax3DPolyCurves& curves, const MinMaxCurve& x, const MinMaxCurve& y, const MinMaxCurve& z, ParticleSystemParticles& ps, const Matrix4x4f& matrix, bool transform)
+{
+	const size_t count = ps.array_size ();
+	for (int q=0;q<count;q++)
+	{
+		Vector3f random;
+		GenerateRandom3(random, ps.randomSeed[q] + kParticleSystemVelocityCurveId);
+		const float time = NormalizedTime(ps, q);
+
+		Vector3f delta;
+		if(isOptimized)
+			delta = Vector3f(EvaluateIntegrated(curves.optX, time, random.x), EvaluateIntegrated(curves.optY, time, random.y), EvaluateIntegrated(curves.optZ, time, random.z)) * ps.startLifetime[q];
+		else
+			delta = Vector3f(EvaluateIntegrated(curves.x, time, random.x), EvaluateIntegrated(curves.y, time, random.y), EvaluateIntegrated(curves.z, time, random.z)) * ps.startLifetime[q];
+
+		Vector3f velocity (Evaluate(x, time, random.x), Evaluate(y, time, random.y), Evaluate(z, time, random.z));
+		if(transform)
+		{
+			delta = matrix.MultiplyVector3 (delta);
+			velocity = matrix.MultiplyVector3 (velocity);
+		}
+		ps.position[q] += delta;
+		ps.animatedVelocity[q] += velocity;
+	}
+}
+
+VelocityModule::VelocityModule () : ParticleSystemModule(false)
+,	m_InWorldSpace (false)
+{}
+
+void VelocityModule::Update (const ParticleSystemReadOnlyState& roState, const ParticleSystemState& state, ParticleSystemParticles& ps, const size_t fromIndex, const size_t toIndex)
+{
+	Matrix4x4f matrix;
+	bool transform = GetTransformationMatrix(matrix, !roState.useLocalSpace, m_InWorldSpace, state.localToWorld);	
+	
+	bool usesScalar = (m_X.minMaxState == kMMCScalar) && (m_Y.minMaxState == kMMCScalar) && (m_Z.minMaxState == kMMCScalar);
+	bool isOptimized = m_X.IsOptimized() && m_Y.IsOptimized() && m_Z.IsOptimized();
+	bool usesMinMax = m_X.UsesMinMax() && m_Y.UsesMinMax() && m_Z.UsesMinMax();
+	if(usesScalar)
+		UpdateTpl<kEMScalar>(m_X, m_Y, m_Z, ps, fromIndex, toIndex, transform, matrix);
+	else if(isOptimized && usesMinMax)
+		UpdateTpl<kEMOptimizedMinMax>(m_X, m_Y, m_Z, ps, fromIndex, toIndex, transform, matrix);
+	else if(isOptimized)
+		UpdateTpl<kEMOptimized>(m_X, m_Y, m_Z, ps, fromIndex, toIndex, transform, matrix);
+	else
+		UpdateTpl<kEMSlow>(m_X, m_Y, m_Z, ps, fromIndex, toIndex, transform, matrix);
+
+}
+
+void VelocityModule::UpdateProcedural (const ParticleSystemReadOnlyState& roState, const ParticleSystemState& state, ParticleSystemParticles& ps)
+{
+	Matrix4x4f matrix;
+	bool transform = GetTransformationMatrix(matrix, !roState.useLocalSpace, m_InWorldSpace, state.localToWorld);
+
+	DualMinMax3DPolyCurves curves;
+	if(m_X.IsOptimized() && m_Y.IsOptimized() && m_Z.IsOptimized())
+	{
+		curves.optX = m_X.polyCurves; curves.optX.Integrate();
+		curves.optY = m_Y.polyCurves; curves.optY.Integrate();
+		curves.optZ = m_Z.polyCurves; curves.optZ.Integrate();
+		UpdateProceduralTpl<true>(curves, m_X, m_Y, m_Z, ps, matrix, transform);
+	}
+	else
+	{
+		DebugAssert(CurvesSupportProcedural (m_X.editorCurves, m_X.minMaxState));
+		DebugAssert(CurvesSupportProcedural (m_Y.editorCurves, m_Y.minMaxState));
+		DebugAssert(CurvesSupportProcedural (m_Z.editorCurves, m_Z.minMaxState));
+		BuildCurves(curves.x, m_X.editorCurves, m_X.GetScalar(), m_X.minMaxState); curves.x.Integrate();
+		BuildCurves(curves.y, m_Y.editorCurves, m_Y.GetScalar(), m_Y.minMaxState); curves.y.Integrate();
+		BuildCurves(curves.z, m_Z.editorCurves, m_Z.GetScalar(), m_Z.minMaxState); curves.z.Integrate();
+		UpdateProceduralTpl<false>(curves, m_X, m_Y, m_Z, ps, matrix, transform);
+	}
+}
+
+void VelocityModule::CalculateProceduralBounds(MinMaxAABB& bounds, const Matrix4x4f& localToWorld, float maxLifeTime)
+{
+	Vector2f xRange = m_X.FindMinMaxIntegrated();
+	Vector2f yRange = m_Y.FindMinMaxIntegrated();
+	Vector2f zRange = m_Z.FindMinMaxIntegrated();
+	bounds.m_Min = Vector3f(xRange.x, yRange.x, zRange.x) * maxLifeTime;
+	bounds.m_Max = Vector3f(xRange.y, yRange.y, zRange.y) * maxLifeTime;
+	if(m_InWorldSpace)
+	{
+		Matrix4x4f matrix;
+		Matrix4x4f::Invert_General3D(localToWorld, matrix);
+		matrix.SetPosition(Vector3f::zero);
+		AABB aabb = bounds;
+		TransformAABBSlow(aabb, matrix, aabb);
+		bounds = aabb;
+	}
+}
+
+template<class TransferFunction>
+void VelocityModule::Transfer (TransferFunction& transfer)
+{
+	ParticleSystemModule::Transfer (transfer);
+	transfer.Transfer (m_X, "x");
+	transfer.Transfer (m_Y, "y");
+	transfer.Transfer (m_Z, "z");
+	transfer.Transfer (m_InWorldSpace, "inWorldSpace"); transfer.Align();
+}
+INSTANTIATE_TEMPLATE_TRANSFER(VelocityModule)
-- 
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