diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c3b21d1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,37 @@
+# ---> C++
+# Prerequisites
+*.d
+
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
+
+Debug/
+x64/
+.vs/
diff --git a/.vs/raytracing/v15/.suo b/.vs/raytracing/v15/.suo
deleted file mode 100644
index 9caa949..0000000
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diff --git a/.vs/raytracing/v15/Browse.VC.db b/.vs/raytracing/v15/Browse.VC.db
deleted file mode 100644
index e85dc91..0000000
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diff --git a/.vs/raytracing/v15/Browse.VC.opendb b/.vs/raytracing/v15/Browse.VC.opendb
deleted file mode 100644
index 6c1f826..0000000
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diff --git a/.vs/raytracing/v15/ipch/AutoPCH/1f56dada07b33bee/MAIN.ipch b/.vs/raytracing/v15/ipch/AutoPCH/1f56dada07b33bee/MAIN.ipch
deleted file mode 100644
index 025ca29..0000000
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diff --git a/Debug/Scene.obj b/Debug/Scene.obj
deleted file mode 100644
index f0f95aa..0000000
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diff --git a/Debug/main.obj b/Debug/main.obj
deleted file mode 100644
index 8cc5b93..0000000
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diff --git a/Debug/raytracing.exe b/Debug/raytracing.exe
deleted file mode 100644
index e53c92b..0000000
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diff --git a/Debug/raytracing.ilk b/Debug/raytracing.ilk
deleted file mode 100644
index 4463b6e..0000000
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diff --git a/Debug/raytracing.log b/Debug/raytracing.log
deleted file mode 100644
index eefc8fe..0000000
--- a/Debug/raytracing.log
+++ /dev/null
@@ -1,9 +0,0 @@
-  Scene.cpp
-  main.cpp
-  util.cpp
-  正在生成代码...
-  LINK : 没有找到 D:\dev\cpp\raytracing\Debug\raytracing.exe 或上一个增量链接没有生成它；正在执行完全链接
-  raytracing.vcxproj -> D:\dev\cpp\raytracing\Debug\raytracing.exe
-  Microsoft (R) COFF/PE Editor Version 14.16.27043.0
-  Copyright (C) Microsoft Corporation.  All rights reserved.
-  
diff --git a/Debug/raytracing.pdb b/Debug/raytracing.pdb
deleted file mode 100644
index 519120b..0000000
Binary files a/Debug/raytracing.pdb and /dev/null differ
diff --git a/Debug/raytracing.tlog/CL.command.1.tlog b/Debug/raytracing.tlog/CL.command.1.tlog
deleted file mode 100644
index f46330c..0000000
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diff --git a/Debug/raytracing.tlog/CL.read.1.tlog b/Debug/raytracing.tlog/CL.read.1.tlog
deleted file mode 100644
index c1408ae..0000000
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diff --git a/Debug/raytracing.tlog/CL.write.1.tlog b/Debug/raytracing.tlog/CL.write.1.tlog
deleted file mode 100644
index 461f6ff..0000000
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diff --git a/Debug/raytracing.tlog/link.command.1.tlog b/Debug/raytracing.tlog/link.command.1.tlog
deleted file mode 100644
index a4a33fa..0000000
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diff --git a/Debug/raytracing.tlog/link.read.1.tlog b/Debug/raytracing.tlog/link.read.1.tlog
deleted file mode 100644
index a58dac8..0000000
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diff --git a/Debug/raytracing.tlog/link.write.1.tlog b/Debug/raytracing.tlog/link.write.1.tlog
deleted file mode 100644
index 69cd0c7..0000000
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diff --git a/Debug/raytracing.tlog/raytracing.lastbuildstate b/Debug/raytracing.tlog/raytracing.lastbuildstate
deleted file mode 100644
index 4c01143..0000000
--- a/Debug/raytracing.tlog/raytracing.lastbuildstate
+++ /dev/null
@@ -1,2 +0,0 @@
-#TargetFrameworkVersion=v4.0:PlatformToolSet=v141:EnableManagedIncrementalBuild=false:VCToolArchitecture=Native32Bit:WindowsTargetPlatformVersion=10.0.17763.0
-Debug|Win32|D:\dev\cpp\raytracing\|
diff --git a/Debug/util.obj b/Debug/util.obj
deleted file mode 100644
index 4020266..0000000
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diff --git a/Debug/vc141.idb b/Debug/vc141.idb
deleted file mode 100644
index f0c42d0..0000000
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diff --git a/Debug/vc141.pdb b/Debug/vc141.pdb
deleted file mode 100644
index 63af7bd..0000000
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diff --git a/glew32.dll b/glew32.dll
deleted file mode 100644
index c9414c2..0000000
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diff --git a/glew32.lib b/glew32.lib
deleted file mode 100644
index 9d4d880..0000000
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diff --git a/x64/Debug/Scene.obj b/x64/Debug/Scene.obj
deleted file mode 100644
index 964304f..0000000
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diff --git a/x64/Debug/main.obj b/x64/Debug/main.obj
deleted file mode 100644
index f732e6c..0000000
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diff --git a/x64/Debug/raytracing.Build.CppClean.log b/x64/Debug/raytracing.Build.CppClean.log
deleted file mode 100644
index ce5c04a..0000000
--- a/x64/Debug/raytracing.Build.CppClean.log
+++ /dev/null
@@ -1,16 +0,0 @@
-d:\dev\cpp\raytracing\x64\debug\vc141.pdb
-d:\dev\cpp\raytracing\x64\debug\vc141.idb
-d:\dev\cpp\raytracing\x64\debug\util.obj
-d:\dev\cpp\raytracing\x64\debug\scene.obj
-d:\dev\cpp\raytracing\x64\debug\main.obj
-d:\dev\cpp\raytracing\x64\debug\raytracing.pdb
-d:\dev\cpp\raytracing\x64\debug\raytracing.tlog\cl.command.1.tlog
-d:\dev\cpp\raytracing\x64\debug\raytracing.tlog\cl.read.1.tlog
-d:\dev\cpp\raytracing\x64\debug\raytracing.tlog\cl.write.1.tlog
-d:\dev\cpp\raytracing\x64\debug\raytracing.tlog\link-cvtres.read.1.tlog
-d:\dev\cpp\raytracing\x64\debug\raytracing.tlog\link-cvtres.write.1.tlog
-d:\dev\cpp\raytracing\x64\debug\raytracing.tlog\link-rc.read.1.tlog
-d:\dev\cpp\raytracing\x64\debug\raytracing.tlog\link-rc.write.1.tlog
-d:\dev\cpp\raytracing\x64\debug\raytracing.tlog\link.command.1.tlog
-d:\dev\cpp\raytracing\x64\debug\raytracing.tlog\link.read.1.tlog
-d:\dev\cpp\raytracing\x64\debug\raytracing.tlog\link.write.1.tlog
diff --git a/x64/Debug/raytracing.log b/x64/Debug/raytracing.log
deleted file mode 100644
index 317d63d..0000000
--- a/x64/Debug/raytracing.log
+++ /dev/null
@@ -1,7 +0,0 @@
-  main.cpp
-  Scene.cpp
-  util.cpp
-  正在生成代码...
-MSVCRTD.lib(exe_main.obj) : error LNK2019: 无法解析的外部符号 main，该符号在函数 "int __cdecl invoke_main(void)" (?invoke_main@@YAHXZ) 中被引用
-glew32.lib : warning LNK4272: 库计算机类型“x86”与目标计算机类型“x64”冲突
-D:\dev\cpp\raytracing\x64\Debug\raytracing.exe : fatal error LNK1120: 1 个无法解析的外部命令
diff --git a/x64/Debug/raytracing.pdb b/x64/Debug/raytracing.pdb
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index ba169fe..0000000
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diff --git a/x64/Debug/raytracing.tlog/CL.command.1.tlog b/x64/Debug/raytracing.tlog/CL.command.1.tlog
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index aaf1d85..0000000
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diff --git a/x64/Debug/raytracing.tlog/CL.read.1.tlog b/x64/Debug/raytracing.tlog/CL.read.1.tlog
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diff --git a/x64/Debug/raytracing.tlog/CL.write.1.tlog b/x64/Debug/raytracing.tlog/CL.write.1.tlog
deleted file mode 100644
index 2228443..0000000
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diff --git a/x64/Debug/raytracing.tlog/link-cvtres.read.1.tlog b/x64/Debug/raytracing.tlog/link-cvtres.read.1.tlog
deleted file mode 100644
index 46b134b..0000000
--- a/x64/Debug/raytracing.tlog/link-cvtres.read.1.tlog
+++ /dev/null
@@ -1 +0,0 @@
-��
\ No newline at end of file
diff --git a/x64/Debug/raytracing.tlog/link-cvtres.write.1.tlog b/x64/Debug/raytracing.tlog/link-cvtres.write.1.tlog
deleted file mode 100644
index 46b134b..0000000
--- a/x64/Debug/raytracing.tlog/link-cvtres.write.1.tlog
+++ /dev/null
@@ -1 +0,0 @@
-��
\ No newline at end of file
diff --git a/x64/Debug/raytracing.tlog/link-rc.read.1.tlog b/x64/Debug/raytracing.tlog/link-rc.read.1.tlog
deleted file mode 100644
index 46b134b..0000000
--- a/x64/Debug/raytracing.tlog/link-rc.read.1.tlog
+++ /dev/null
@@ -1 +0,0 @@
-��
\ No newline at end of file
diff --git a/x64/Debug/raytracing.tlog/link-rc.write.1.tlog b/x64/Debug/raytracing.tlog/link-rc.write.1.tlog
deleted file mode 100644
index 46b134b..0000000
--- a/x64/Debug/raytracing.tlog/link-rc.write.1.tlog
+++ /dev/null
@@ -1 +0,0 @@
-��
\ No newline at end of file
diff --git a/x64/Debug/raytracing.tlog/link.command.1.tlog b/x64/Debug/raytracing.tlog/link.command.1.tlog
deleted file mode 100644
index 46b134b..0000000
--- a/x64/Debug/raytracing.tlog/link.command.1.tlog
+++ /dev/null
@@ -1 +0,0 @@
-��
\ No newline at end of file
diff --git a/x64/Debug/raytracing.tlog/link.read.1.tlog b/x64/Debug/raytracing.tlog/link.read.1.tlog
deleted file mode 100644
index 46b134b..0000000
--- a/x64/Debug/raytracing.tlog/link.read.1.tlog
+++ /dev/null
@@ -1 +0,0 @@
-��
\ No newline at end of file
diff --git a/x64/Debug/raytracing.tlog/link.write.1.tlog b/x64/Debug/raytracing.tlog/link.write.1.tlog
deleted file mode 100644
index 46b134b..0000000
--- a/x64/Debug/raytracing.tlog/link.write.1.tlog
+++ /dev/null
@@ -1 +0,0 @@
-��
\ No newline at end of file
diff --git a/x64/Debug/raytracing.tlog/raytracing.lastbuildstate b/x64/Debug/raytracing.tlog/raytracing.lastbuildstate
deleted file mode 100644
index 24550f6..0000000
--- a/x64/Debug/raytracing.tlog/raytracing.lastbuildstate
+++ /dev/null
@@ -1,2 +0,0 @@
-#TargetFrameworkVersion=v4.0:PlatformToolSet=v141:EnableManagedIncrementalBuild=false:VCToolArchitecture=Native32Bit:WindowsTargetPlatformVersion=10.0.17763.0
-Debug|x64|D:\dev\cpp\raytracing\|
diff --git a/x64/Debug/raytracing.tlog/unsuccessfulbuild b/x64/Debug/raytracing.tlog/unsuccessfulbuild
deleted file mode 100644
index e69de29..0000000
diff --git a/x64/Debug/util.obj b/x64/Debug/util.obj
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index 383622c..0000000
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diff --git a/x64/Debug/vc141.idb b/x64/Debug/vc141.idb
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diff --git a/x64/Debug/vc141.pdb b/x64/Debug/vc141.pdb
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