Merge pull request #2 from swardle/sg14-from-swardle-master-compare-v…

…table-function

Add a C++ example of a entity inner loop

cpp_entity_example/cpp_entity_example.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 14
+VisualStudioVersion = 14.0.23107.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "cpp_entity_example", "cpp_entity_example\cpp_entity_example.vcxproj", "{824B9034-F61C-4936-A66C-C0D27C9C2923}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{824B9034-F61C-4936-A66C-C0D27C9C2923}.Debug|x64.ActiveCfg = Debug|x64
+		{824B9034-F61C-4936-A66C-C0D27C9C2923}.Debug|x64.Build.0 = Debug|x64
+		{824B9034-F61C-4936-A66C-C0D27C9C2923}.Debug|x86.ActiveCfg = Debug|Win32
+		{824B9034-F61C-4936-A66C-C0D27C9C2923}.Debug|x86.Build.0 = Debug|Win32
+		{824B9034-F61C-4936-A66C-C0D27C9C2923}.Release|x64.ActiveCfg = Release|x64
+		{824B9034-F61C-4936-A66C-C0D27C9C2923}.Release|x64.Build.0 = Release|x64
+		{824B9034-F61C-4936-A66C-C0D27C9C2923}.Release|x86.ActiveCfg = Release|Win32
+		{824B9034-F61C-4936-A66C-C0D27C9C2923}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

cpp_entity_example/cpp_entity_example/Debug/cpp_entity_example.log

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+Build started 2015-09-26 4:02:44 PM.
+     1>Project "C:\github\SG14\cpp_entity_example\cpp_entity_example\cpp_entity_example.vcxproj" on node 2 (Build target(s)).
+     1>ClCompile:
+         C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\CL.exe /c /ZI /nologo /W3 /WX- /sdl /Od /Oy- /D WIN32 /D _DEBUG /D _CONSOLE /D _UNICODE /D UNICODE /Gm /EHsc /RTC1 /MDd /GS /fp:precise /Zc:wchar_t /Zc:forScope /Zc:inline /Yu"stdafx.h" /Fp"Debug\cpp_entity_example.pch" /Fo"Debug\\" /Fd"Debug\vc140.pdb" /Gd /TP /analyze- /errorReport:prompt cpp_entity_example.cpp
+         cpp_entity_example.cpp
+     1>c:\github\sg14\cpp_entity_example\cpp_entity_example\cpp_entity_example.cpp(57): error C2065: 'default_random_engine': undeclared identifier
+     1>c:\github\sg14\cpp_entity_example\cpp_entity_example\cpp_entity_example.cpp(57): error C2146: syntax error: missing ';' before identifier 'generator'
+     1>c:\github\sg14\cpp_entity_example\cpp_entity_example\cpp_entity_example.cpp(57): error C2065: 'generator': undeclared identifier
+     1>c:\github\sg14\cpp_entity_example\cpp_entity_example\cpp_entity_example.cpp(58): error C2065: 'uniform_real_distribution': undeclared identifier
+     1>c:\github\sg14\cpp_entity_example\cpp_entity_example\cpp_entity_example.cpp(58): error C2062: type 'float' unexpected
+     1>c:\github\sg14\cpp_entity_example\cpp_entity_example\cpp_entity_example.cpp(59): error C2065: 'unique_ptr': undeclared identifier
+     1>c:\github\sg14\cpp_entity_example\cpp_entity_example\cpp_entity_example.cpp(59): error C2275: 'entity': illegal use of this type as an expression
+         c:\github\sg14\cpp_entity_example\cpp_entity_example\cpp_entity_example.cpp(32): note: see declaration of 'entity'
+     1>c:\github\sg14\cpp_entity_example\cpp_entity_example\cpp_entity_example.cpp(59): error C2974: 'std::vector': invalid template argument for '_Ty', type expected
+         c:\program files (x86)\microsoft visual studio 14.0\vc\include\vector(678): note: see declaration of 'std::vector'
+         c:\program files (x86)\microsoft visual studio 14.0\vc\include\vector(678): note: see declaration of 'std::vector'
+     1>c:\github\sg14\cpp_entity_example\cpp_entity_example\cpp_entity_example.cpp(59): error C2143: syntax error: missing ';' before '>'
+     1>c:\github\sg14\cpp_entity_example\cpp_entity_example\cpp_entity_example.cpp(59): error C2059: syntax error: '>'
+     1>c:\github\sg14\cpp_entity_example\cpp_entity_example\cpp_entity_example.cpp(60): error C2065: 'entity_vec': undeclared identifier
+     1>c:\github\sg14\cpp_entity_example\cpp_entity_example\cpp_entity_example.cpp(62): error C2059: syntax error: 'return'
+     1>Done Building Project "C:\github\SG14\cpp_entity_example\cpp_entity_example\cpp_entity_example.vcxproj" (Build target(s)) -- FAILED.
+
+Build FAILED.
+
+Time Elapsed 00:00:00.22

cpp_entity_example/cpp_entity_example/ReadMe.txt

@@ -0,0 +1,40 @@
+========================================================================
+    CONSOLE APPLICATION : cpp_entity_example Project Overview
+========================================================================
+
+AppWizard has created this cpp_entity_example application for you.
+
+This file contains a summary of what you will find in each of the files that
+make up your cpp_entity_example application.
+
+
+cpp_entity_example.vcxproj
+    This is the main project file for VC++ projects generated using an Application Wizard.
+    It contains information about the version of Visual C++ that generated the file, and
+    information about the platforms, configurations, and project features selected with the
+    Application Wizard.
+
+cpp_entity_example.vcxproj.filters
+    This is the filters file for VC++ projects generated using an Application Wizard. 
+    It contains information about the association between the files in your project 
+    and the filters. This association is used in the IDE to show grouping of files with
+    similar extensions under a specific node (for e.g. ".cpp" files are associated with the
+    "Source Files" filter).
+
+cpp_entity_example.cpp
+    This is the main application source file.
+
+/////////////////////////////////////////////////////////////////////////////
+Other standard files:
+
+StdAfx.h, StdAfx.cpp
+    These files are used to build a precompiled header (PCH) file
+    named cpp_entity_example.pch and a precompiled types file named StdAfx.obj.
+
+/////////////////////////////////////////////////////////////////////////////
+Other notes:
+
+AppWizard uses "TODO:" comments to indicate parts of the source code you
+should add to or customize.
+
+/////////////////////////////////////////////////////////////////////////////

cpp_entity_example/cpp_entity_example/cpp_entity_example.cpp

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+// cpp_entity_example.cpp : Defines the entry point for the console application.
+//
+
+#include "stdafx.h"
+#include "entity.h"
+#include "lerp.h"
+#include "hermite.h"
+
+#include <vector>
+#include <memory>
+#include <random>
+#include <iostream>
+#include <assert.h>
+#include <chrono>
+#include <ctime>
+#include <algorithm>
+using namespace std;
+
+#define ARRAY_SIZE(array) (sizeof((array))/sizeof((array[0])))
+float dummyOut[100];
+int dummyOutIndex = 0;
+vector<std::chrono::duration<double, std::ratio<1, 1000>>> gSlowSimpleUpdateExampleTimers;
+vector<std::chrono::duration<double, std::ratio<1, 1000>>> gSlowComplicatedUpdateExampleTimers;
+vector<std::chrono::duration<double, std::ratio<1, 1000>>> gFastUpdateExampleTimers;
+
+
+class mytimer
+{
+public:
+	std::chrono::time_point<std::chrono::high_resolution_clock> m_start;
+	std::chrono::time_point<std::chrono::high_resolution_clock> m_end;
+	mytimer()
+	{
+		m_start = std::chrono::high_resolution_clock::now();
+	}
+	std::chrono::duration<double> stop()
+	{
+		m_end = std::chrono::high_resolution_clock::now();
+		return m_end - m_start;
+	}
+};
+
+
+void SlowUpdateExample()
+{
+#ifdef PRINT
+	cout << "SlowUpdateExample" << endl;
+#endif
+	default_random_engine generator;
+	uniform_real_distribution<float> distribution(0, 1);
+
+	int number_of_lerp = 400;
+	int number_of_hermite = 1000;
+	vector<long long> create_types;
+	for (int i = 0; i < number_of_lerp; i++)
+	{
+		create_types.emplace_back(entity_lerp_slow::type);
+	}
+	for (int i = 0; i < number_of_hermite; i++)
+	{
+		create_types.emplace_back(entity_hermite::type);
+	}
+
+	shuffle(create_types.begin(), create_types.end(), generator);
+
+	vector<unique_ptr<entity>> entity_vec;
+	for (auto &create_type : create_types)
+	{
+		if (create_type == entity_hermite::type)
+		{
+			unique_ptr<entity> a(create_entity_hermite(distribution(generator), distribution(generator), distribution(generator), distribution(generator)));
+			entity_vec.emplace_back(std::move(a));
+		}
+		else
+		{
+			unique_ptr<entity> a(create_entity_lerp_slow(distribution(generator), distribution(generator)));
+			entity_vec.emplace_back(std::move(a));
+		}
+	}
+
+	{
+		mytimer a;
+		for (float t = 0.0f; t < 1.0; t += 0.05f)
+		{
+			for (auto &a : entity_vec)
+			{
+				a->Update(t);
+#ifdef PRINT
+				cout << endl;
+#endif
+			}
+		}
+		gSlowSimpleUpdateExampleTimers.emplace_back(a.stop());
+	}
+}
+
+void SlowComplicatedUpdateExample()
+{
+#ifdef PRINT
+	cout << "SlowComplicatedUpdateExample" << endl;
+#endif
+	default_random_engine generator;
+	uniform_real_distribution<float> distribution(0, 1);
+
+	int number_of_lerp = 400;
+	int number_of_hermite = 1000;
+	vector<long long> create_types;
+	for (int i = 0; i < number_of_lerp; i++)
+	{
+		create_types.emplace_back(entity_lerp_fast::type);
+	}
+	for (int i = 0; i < number_of_hermite; i++)
+	{
+		create_types.emplace_back(entity_hermite::type);
+	}
+
+	shuffle(create_types.begin(), create_types.end(), generator);
+
+	vector<unique_ptr<entity>> entity_vec;
+	for (auto &create_type : create_types)
+	{
+		if (create_type == entity_hermite::type)
+		{
+			unique_ptr<entity> a(create_entity_hermite(distribution(generator), distribution(generator), distribution(generator), distribution(generator)));
+			entity_vec.emplace_back(std::move(a));
+		}
+		else
+		{
+			unique_ptr<entity> a(create_entity_lerp_fast(distribution(generator), distribution(generator)));
+			entity_vec.emplace_back(std::move(a));
+		}
+	}
+
+
+	{
+		mytimer a;
+		for (float t = 0.0f; t < 1.0; t += 0.05f)
+		{
+			for (auto &a : entity_vec)
+			{
+				if (a->GetType() != entity_lerp_fast::type)
+				{
+					a->Update(t);
+#ifdef PRINT
+					cout << endl;
+#endif
+				}
+			}
+			entity_lerp_fast::UpdateAll(t);
+		}
+		gSlowComplicatedUpdateExampleTimers.emplace_back(a.stop());
+	}
+}
+
+void FastUpdateExampleTimers()
+{
+#ifdef PRINT
+	cout << "FastUpdateExampleTimers" << endl;
+#endif
+	default_random_engine generator;
+	uniform_real_distribution<float> distribution(0, 1);
+
+	int number_of_lerp = 400;
+	int number_of_hermite = 1000;
+	vector<long long> create_types;
+	for (int i = 0; i < number_of_lerp; i++)
+	{
+		create_types.emplace_back(entity_lerp_fast::type);
+	}
+	for (int i = 0; i < number_of_hermite; i++)
+	{
+		create_types.emplace_back(entity_hermite::type);
+	}
+
+	shuffle(create_types.begin(), create_types.end(), generator);
+
+	vector<unique_ptr<entity>> entity_vec;
+	for (auto &create_type : create_types)
+	{
+		if (create_type == entity_hermite::type)
+		{
+			unique_ptr<entity> a(create_entity_hermite(distribution(generator), distribution(generator), distribution(generator), distribution(generator)));
+			entity_vec.emplace_back(std::move(a));
+		}
+		else
+		{
+			unique_ptr<entity> a(create_entity_lerp_fast(distribution(generator), distribution(generator)));
+			entity_vec.emplace_back(std::move(a));
+		}
+	}
+
+
+	{
+		mytimer a;
+		for (float t = 0.0f; t < 1.0; t += 0.05f)
+		{
+			for (auto &a : entity_vec)
+			{
+				if (*a->m_typedata != entity_lerp_fast::type)
+				{
+					a->Update(t);
+#ifdef PRINT
+					cout << endl;
+#endif
+				}
+			}
+			entity_lerp_fast::UpdateAll(t);
+		}
+		gFastUpdateExampleTimers.emplace_back(a.stop());
+	}
+}
+
+int main()
+{
+	SlowUpdateExample();
+	SlowComplicatedUpdateExample();
+	FastUpdateExampleTimers();
+
+	for (auto a : dummyOut)
+	{
+		cout << "dummyOut " << a << endl;
+	}
+
+	for (auto & t : gSlowSimpleUpdateExampleTimers)
+	{
+		cout << "gSlowUpdateExample ms " << t.count() << endl;
+	}
+	for (auto & t : gSlowComplicatedUpdateExampleTimers)
+	{
+		cout << "gSlowComplicatedUpdateExampleTimers ms " << t.count() << endl;
+	}
+	for (auto & t : gFastUpdateExampleTimers)
+	{
+		cout << "gFastUpdateExampleTimers ms " << t.count() << endl;
+	}
+	return 0;
+}
+