First Commit

memory-external/classes/vector.hpp

@@ -0,0 +1,105 @@
+#pragma once
+#include <numbers>
+#include <cmath>
+
+int screen_x = GetSystemMetrics(SM_CXSCREEN);
+int screen_y = GetSystemMetrics(SM_CYSCREEN);
+
+struct view_matrix_t {
+	float* operator[ ](int index) {
+		return matrix[index];
+	}
+
+	float matrix[4][4];
+};
+
+struct Vector3
+{
+	// constructor
+	constexpr Vector3(
+		const float x = 0.f,
+		const float y = 0.f,
+		const float z = 0.f) noexcept :
+		x(x), y(y), z(z) { }
+
+	// operator overloads
+	constexpr const Vector3& operator-(const Vector3& other) const noexcept
+	{
+		return Vector3{ x - other.x, y - other.y, z - other.z };
+	}
+
+	constexpr const Vector3& operator+(const Vector3& other) const noexcept
+	{
+		return Vector3{ x + other.x, y + other.y, z + other.z };
+	}
+
+	constexpr const Vector3& operator/(const float factor) const noexcept
+	{
+		return Vector3{ x / factor, y / factor, z / factor };
+	}
+
+	constexpr const Vector3& operator*(const float factor) const noexcept
+	{
+		return Vector3{ x * factor, y * factor, z * factor };
+	}
+
+	constexpr const bool operator>(const Vector3& other) const noexcept {
+		return x > other.x && y > other.y && z > other.z;
+	}
+
+	constexpr const bool operator>=(const Vector3& other) const noexcept {
+		return x >= other.x && y >= other.y && z >= other.z;
+	}
+
+	constexpr const bool operator<(const Vector3& other) const noexcept {
+		return x < other.x && y < other.y && z < other.z;
+	}
+
+	constexpr const bool operator<=(const Vector3& other) const noexcept {
+		return x <= other.x && y <= other.y && z <= other.z;
+	}
+
+	// utils
+	constexpr const Vector3& ToAngle() const noexcept
+	{
+		return Vector3{
+			std::atan2(-z, std::hypot(x, y)) * (180.0f / std::numbers::pi_v<float>),
+			std::atan2(y, x) * (180.0f / std::numbers::pi_v<float>),
+			0.0f };
+	}
+
+	float length() const {
+		return std::sqrt(x * x + y * y + z * z);
+	}
+
+	float length2d() const {
+		return std::sqrt(x * x + y * y);
+	}
+
+	constexpr const bool IsZero() const noexcept
+	{
+		return x == 0.f && y == 0.f && z == 0.f;
+	}
+
+	Vector3 world_to_screen(view_matrix_t matrix) const {
+		float _x = matrix[0][0] * x + matrix[0][1] * y + matrix[0][2] * z + matrix[0][3];
+		float _y = matrix[1][0] * x + matrix[1][1] * y + matrix[1][2] * z + matrix[1][3];
+
+		float w = matrix[3][0] * x + matrix[3][1] * y + matrix[3][2] * z + matrix[3][3];
+
+		float inv_w = 1.f / w;
+		_x *= inv_w;
+		_y *= inv_w;
+
+		float x = screen_x * .5f;
+		float y = screen_y * .5f;
+
+		x += 0.5f * _x * screen_x + 0.5f;
+		y -= 0.5f * _y * screen_y + 0.5f;
+
+		return { x, y, w };
+	}
+
+	// struct data
+	float x, y, z;
+};