renderer_opengl: Remove GLvec* types

* The common types already exist and provide all the functionality required, why invent new types?

src/common/vector_math.h

@@ -31,6 +31,7 @@
 #pragma once
 
 #include <cmath>
+#include <cstring>
 #include <type_traits>
 #include <boost/serialization/access.hpp>
 
@@ -60,6 +61,10 @@ public:
         return &x;
     }
 
+    const T* AsArray() const {
+        return &x;
+    }
+
     constexpr Vec2() = default;
     constexpr Vec2(const T& x_, const T& y_) : x(x_), y(y_) {}
 
@@ -123,6 +128,14 @@ public:
         return x * x + y * y;
     }
 
+    [[nodiscard]] constexpr bool operator!=(const Vec2& other) const {
+        return std::memcmp(AsArray(), other.AsArray(), sizeof(Vec2)) != 0;
+    }
+
+    [[nodiscard]] constexpr bool operator==(const Vec2& other) const {
+        return std::memcmp(AsArray(), other.AsArray(), sizeof(Vec2)) == 0;
+    }
+
     // Only implemented for T=float
     [[nodiscard]] float Length() const;
     [[nodiscard]] float Normalize(); // returns the previous length, which is often useful
@@ -184,6 +197,8 @@ template <typename T, typename V>
 }
 
 using Vec2f = Vec2<float>;
+using Vec2i = Vec2<int>;
+using Vec2u = Vec2<unsigned int>;
 
 template <>
 inline float Vec2<float>::Length() const {
@@ -216,6 +231,10 @@ public:
         return &x;
     }
 
+    const T* AsArray() const {
+        return &x;
+    }
+
     constexpr Vec3() = default;
     constexpr Vec3(const T& x_, const T& y_, const T& z_) : x(x_), y(y_), z(z_) {}
 
@@ -280,6 +299,14 @@ public:
         return *this;
     }
 
+    [[nodiscard]] constexpr bool operator!=(const Vec3& other) const {
+        return std::memcmp(AsArray(), other.AsArray(), sizeof(Vec3)) != 0;
+    }
+
+    [[nodiscard]] constexpr bool operator==(const Vec3& other) const {
+        return std::memcmp(AsArray(), other.AsArray(), sizeof(Vec3)) == 0;
+    }
+
     [[nodiscard]] constexpr T Length2() const {
         return x * x + y * y + z * z;
     }
@@ -412,6 +439,8 @@ inline float Vec3<float>::Normalize() {
 }
 
 using Vec3f = Vec3<float>;
+using Vec3i = Vec3<int>;
+using Vec3u = Vec3<unsigned int>;
 
 template <typename T>
 class Vec4 {
@@ -434,6 +463,10 @@ public:
         return &x;
     }
 
+    const T* AsArray() const {
+        return &x;
+    }
+
     constexpr Vec4() = default;
     constexpr Vec4(const T& x_, const T& y_, const T& z_, const T& w_)
         : x(x_), y(y_), z(z_), w(w_) {}
@@ -503,6 +536,14 @@ public:
         return *this;
     }
 
+    [[nodiscard]] constexpr bool operator!=(const Vec4& other) const {
+        return std::memcmp(AsArray(), other.AsArray(), sizeof(Vec4)) != 0;
+    }
+
+    [[nodiscard]] constexpr bool operator==(const Vec4& other) const {
+        return std::memcmp(AsArray(), other.AsArray(), sizeof(Vec4)) == 0;
+    }
+
     [[nodiscard]] constexpr T Length2() const {
         return x * x + y * y + z * z + w * w;
     }
@@ -623,6 +664,8 @@ template <typename T, typename V>
 }
 
 using Vec4f = Vec4<float>;
+using Vec4i = Vec4<int>;
+using Vec4u = Vec4<unsigned int>;
 
 template <typename T>
 constexpr decltype(T{} * T{} + T{} * T{}) Dot(const Vec2<T>& a, const Vec2<T>& b) {