Fix build and sloppy build errors

.gitignore

@@ -1,4 +1,5 @@
 exercise1/build/
 exercise2/build/
+exercise3/build/
 
 .vscode/ipch

.vscode/tasks.json

@@ -36,6 +36,27 @@
         "clear": true
       }
     },
+    {
+      "label": "Run Exercise 3",
+      "type": "shell",
+      "command": "exercise3/build/cmake/./exercise3",
+      "dependsOn": "Build Exercise 3",
+      "problemMatcher": []
+    },
+    {
+      "label": "Build Exercise 3",
+      "type": "shell",
+      "command": "cd exercise3/build/cmake && cmake . && make -j4",
+      "problemMatcher": [],
+      "presentation": {
+        "echo": true,
+        "reveal": "always",
+        "focus": false,
+        "panel": "shared",
+        "showReuseMessage": true,
+        "clear": true
+      }
+    },
     {
       "label": "Run Exercise 2",
       "type": "shell",

exercise3/build/cmake/CMakeLists.txt

@@ -21,7 +21,7 @@ set(HEADERS
 	../../include/recursive_cubes.h
 	../../dependencies/qdbmp/include/qdbmp.h
 )
-   
+
 # Definition der Sourcedateien
 set(SOURCES
 	../../src/abstract_scene.cpp
@@ -55,4 +55,4 @@ add_executable(exercise3
 )
 
 # Bibliotheken linken
-target_link_libraries(exercise3 ${OPENGL_LIBRARIES} ${GLUT_LIBRARY})
+target_link_libraries(exercise3 ${OPENGL_LIBRARIES} ${GLUT_LIBRARY}  -lpthread)

exercise3/include/tiny_vec.h

@@ -1,16 +1,16 @@
 //
-// This source code is property of the Computer Graphics and Visualization 
+// This source code is property of the Computer Graphics and Visualization
-// chair of the TU Dresden. Do not distribute in modified or unmodified form! 
+// chair of the TU Dresden. Do not distribute in modified or unmodified form!
 // Copyright (C) 2016 CGV TU Dresden - All Rights Reserved
 //
 /*************************************************************************
 Template class for vectors.
 This template class defines small vectors of a defined dimension with
 an arbitrary data type. Basic operations such as addition of vectors and
-multiplication of a vector and a scalar are supported via operator 
+multiplication of a vector and a scalar are supported via operator
-overloading. Also more advanced functions such as normalization and 
+overloading. Also more advanced functions such as normalization and
 iterating through the elements are implemented.
-At the end of this file the data types "point2d", "point3d" and 
+At the end of this file the data types "point2d", "point3d" and
 "point4d" are specified as a tinyvec of doubles with the according dimension.
 *************************************************************************/
 
@@ -22,9 +22,10 @@ At the end of this file the data types "point2d", "point3d" and
 #include <iostream>
 #include <algorithm>
 #include <cassert>
+#include <numeric>
 #include <math.h>
 
-#ifdef _MSC_VER 
+#ifdef _MSC_VER
 #pragma warning( push )
 #pragma warning( disable : 4996 )
 #endif
@@ -64,7 +65,7 @@ public:
 
 	tiny_vec(const T&x,const T&y, const T&z);
 
-	tiny_vec(const T&x, const T&y, const T&z,const T& w);	
+	tiny_vec(const T&x, const T&y, const T&z,const T& w);
 
 	int size() const;
 
@@ -87,7 +88,7 @@ public:
 	tiny_vec& operator=(const tiny_vec & v);
 
 	void fill(const T& s);
-	
+
 	void zeros();
 
 	void ones();
@@ -106,14 +107,14 @@ public:
 
 	const_reverse_iterator rbegin() const;
 
-	const_reverse_iterator rend() const;	
+	const_reverse_iterator rend() const;
 
 	bool operator==(const tiny_vec& v) const;
 
 	bool operator!=(const tiny_vec& v) const;
 
 	tiny_vec operator-() const;
-	
+
 
 
 	tiny_vec& operator+=(int s);
@@ -123,45 +124,45 @@ public:
 	tiny_vec& operator+=(double s);
 
 
-	
+
 	tiny_vec operator+(int s) const;
 
 	tiny_vec operator+(float s) const;
 
 	tiny_vec operator+(double s) const;
-	
+
-	
+
-	
+
 	tiny_vec& operator-=(int s);
 
 	tiny_vec& operator-=(float s);
-		
-	tiny_vec& operator-=(double s);
-	
 
-	
+	tiny_vec& operator-=(double s);
+
+
+
 	tiny_vec operator-(int s) const;
 
 	tiny_vec operator-(float s) const;
 
 	tiny_vec operator-(double s) const;
-	
+
-	
+
-	
+
 	tiny_vec& operator*=(int s);
 
 	tiny_vec& operator*=(float s);
 
 	tiny_vec& operator*=(double s);
-	
 
-		
+
+
 	tiny_vec operator*(int s) const;
 
 	tiny_vec operator*(float s) const;
 
 	tiny_vec operator*(double s) const;
-	
+
 
 
 	tiny_vec& operator/=(int s);
@@ -171,11 +172,11 @@ public:
 	tiny_vec& operator/=(double s);
 
 
-	
+
 	tiny_vec operator/(int s) const;
 
 	tiny_vec operator/(float s) const;
-	
+
 	tiny_vec operator/(double s) const;
 
 	tiny_vec& operator+=(const tiny_vec& v);
@@ -243,8 +244,8 @@ tiny_vec<T,N>::tiny_vec(){}
 
 template <typename T, int N>
 tiny_vec<T,N>::tiny_vec(size_t n,const T* marray)
-{			
+{
-	std::copy(marray,marray+N,begin());		
+	std::copy(marray,marray+N,begin());
 }
 
 template <typename T, int N>
@@ -363,7 +364,7 @@ void tiny_vec<T,N>::fill(const T& s)
 
 template <typename T, int N>
 void tiny_vec<T,N>::zeros()
-{	
+{
 	T zero;
 	zero=0;
 	std::fill(begin(), end(), zero);
@@ -794,7 +795,7 @@ size_t tiny_vec<T,N>::min_index() const
 }
 
 template <typename T, int N>
-T& tiny_vec<T,N>::max_elem() 
+T& tiny_vec<T,N>::max_elem()
 {
 	return *std::max_element(begin(),end());
 }