From 400410fcd436d5e4310bfa779f0309c5fae5b2c2 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sat, 16 Jan 2021 18:09:15 +0000
Subject: Initial commit

Stripped back and formatted from https://github.com/BennyQBD/ModernOpenGLTutorial/
---
 math3d.h | 180 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 180 insertions(+)
 create mode 100644 math3d.h

(limited to 'math3d.h')

diff --git a/math3d.h b/math3d.h
new file mode 100644
index 0000000..8cdb756
--- /dev/null
+++ b/math3d.h
@@ -0,0 +1,180 @@
+#ifndef MATH3D_INCLUDED_H
+#define MATH3D_INCLUDED_H
+
+#include <glm.hpp>
+/*
+namespace Math3D
+{
+	static const double PI = 3.1415926535897932384626433832795;
+	static const double PIOVER2 = PI / 2.0;
+	static const double PIOVER180 = PI / 180.0;
+
+	static inline double ToRadians(double x) { return PIOVER180 * x; }
+	static inline double ToDegrees(double x) { return 180.0 * x / PI; }
+};
+
+struct Vector3f
+{
+public:
+	Vector3f(float x = 0.0f, float y = 0.0f, float z = 0.0f)
+	{
+		data.x = x;
+		data.y = y;
+		data.z = z;
+	}
+
+	inline float GetX() const { return data.x; }
+	inline float GetY() const { return data.y; }
+	inline float GetZ() const { return data.z; }
+
+	inline void SetX(float x) { data.x = x; }
+	inline void SetY(float y) { data.y = y; }
+	inline void SetZ(float z) { data.z = z; }
+
+	inline glm::vec3& GetRawVector() const { return glm::vec3(data); }
+
+	inline float Length()
+	{
+		return sqrtf(this->Dot(*this));
+	}
+
+	inline Vector3f Normalized()
+	{
+		return *this / Length();
+	}
+
+	inline float Dot(const Vector3f& r) const
+	{
+		return glm::dot(data, r.GetRawVector());
+	}
+
+	inline Vector3f Cross(const Vector3f& r) const
+	{
+		return Vector3f(glm::cross(data, r.GetRawVector()));
+	}
+
+	inline Vector3f Rotate(const Vector3f& axis, float angle) const
+	{
+		float sinAngle = sinf(angle);
+		float cosAngle = cosf(angle);
+
+		return this->Cross(axis * sinAngle) +           //Rotation on local X
+			   (*this * cosAngle) +                     //Rotation on local Z
+			   axis * this->Dot(axis * (1 - cosAngle)); //Rotation on local Y
+	}
+
+	inline void operator+=(const Vector3f& r)
+	{
+		data.x += r.GetX();
+		data.y += r.GetY();
+		data.z += r.GetZ();
+	}
+
+	inline Vector3f operator+(const Vector3f& r) const
+	{
+		return Vector3f(data.x + r.GetX(),
+						data.y + r.GetY(),
+						data.z + r.GetZ());
+	}
+
+	inline Vector3f operator*(float r) const
+	{
+		return Vector3f(data.x * r,
+						data.y * r,
+						data.z * r);
+	}
+
+	inline Vector3f operator/(float r) const
+	{
+		return Vector3f(data.x / r,
+						data.y / r,
+						data.z / r);
+	}
+
+private:
+	Vector3f(glm::vec3& data)
+	{
+		this->data.x = data.x;
+		this->data.y = data.y;
+		this->data.z = data.z;
+	}
+	glm::vec3 data;
+};
+
+struct Vector2f
+{
+public:
+	Vector2f(float x = 0.0f, float y = 0.0f)
+	{
+		data.x = x;
+		data.y = y;
+	}
+
+	inline float GetX() const { return data.x; }
+	inline float GetY() const { return data.y; }
+
+	inline void SetX(float x) { data.x = x; }
+	inline void SetY(float y) { data.y = y; }
+
+private:
+	DirectX::XMFLOAT2 data;
+};
+
+struct Matrix4f
+{
+public:
+	static Matrix4f InitTranslation(const Vector3f& translation)
+	{
+		return Matrix4f(DirectX::XMMatrixTranslation(translation.GetX(), translation.GetY(), translation.GetZ()));
+	}
+
+	static Matrix4f InitRotation(const Vector3f& eulerAngles)
+	{
+		return Matrix4f(DirectX::XMMatrixRotationRollPitchYaw(eulerAngles.GetX(), eulerAngles.GetY(),
+eulerAngles.GetZ()));
+	}
+
+	static Matrix4f InitScale(const Vector3f& scale)
+	{
+		return Matrix4f(DirectX::XMMatrixScaling(scale.GetX(), scale.GetY(), scale.GetZ()));
+	}
+
+	static Matrix4f InitLookTo(const Vector3f& eye, const Vector3f& direction, const Vector3f& up)
+	{
+		return Matrix4f(DirectX::XMMatrixLookToLH(eye.GetDXVector(), direction.GetDXVector(), up.GetDXVector()));
+	}
+
+	static Matrix4f InitPerspective(float angle, float aspect, float zNear, float zFar)
+	{
+		return Matrix4f(DirectX::XMMatrixPerspectiveFovLH(angle, aspect, zNear, zFar));
+	}
+
+	Matrix4f()
+	{
+		m_Data = DirectX::XMMatrixIdentity();
+	}
+
+	Matrix4f Inverse() const
+	{
+		return Matrix4f(DirectX::XMMatrixInverse(NULL, m_Data));
+	}
+
+	Matrix4f Transpose() const
+	{
+		return Matrix4f(DirectX::XMMatrixTranspose(m_Data));
+	}
+
+	inline Matrix4f operator*(const Matrix4f& r) const
+	{
+		return Matrix4f(m_Data * r.m_Data);
+	}
+private:
+	Matrix4f(const DirectX::XMMATRIX& data)
+	{
+		m_Data = data;
+	}
+
+	DirectX::XMMATRIX m_Data;
+};
+*/
+#endif
\ No newline at end of file
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