Initial commit

src/math/Vector.h

@@ -0,0 +1,129 @@
+#pragma once
+
+class CVector : public RwV3d
+{
+public:
+	CVector(void) {}
+	CVector(float x, float y, float z)
+	{
+		this->x = x;
+		this->y = y;
+		this->z = z;
+	}
+
+	CVector(const RwV3d &v)
+	{
+		x = v.x;
+		y = v.y;
+		z = v.z;
+	}
+	// (0,1,0) means no rotation. So get right vector and its atan
+	float Heading(void) const { return Atan2(-x, y); }
+	float Magnitude(void) const { return Sqrt(x*x + y*y + z*z); }
+	float MagnitudeSqr(void) const { return x*x + y*y + z*z; }
+	float Magnitude2D(void) const { return Sqrt(x*x + y*y); }
+	float MagnitudeSqr2D(void) const { return x*x + y*y; }
+	void Normalise(void);
+	
+	void Normalise2D(void) {
+		float sq = MagnitudeSqr2D();
+		float invsqrt = RecipSqrt(sq);
+		x *= invsqrt;
+		y *= invsqrt;
+	}
+
+	const CVector &operator+=(CVector const &right) {
+		x += right.x;
+		y += right.y;
+		z += right.z;
+		return *this;
+	}
+
+	const CVector &operator-=(CVector const &right) {
+		x -= right.x;
+		y -= right.y;
+		z -= right.z;
+		return *this;
+	}
+
+	const CVector &operator*=(float right) {
+		x *= right;
+		y *= right;
+		z *= right;
+		return *this;
+	}
+
+	const CVector &operator/=(float right) {
+		x /= right;
+		y /= right;
+		z /= right;
+		return *this;
+	}
+
+	CVector operator-() const {
+		return CVector(-x, -y, -z);
+	}
+
+	const bool operator==(CVector const &right) {
+		return x == right.x && y == right.y && z == right.z;
+	}
+
+	const bool operator!=(CVector const &right) {
+		return x != right.x || y != right.y || z != right.z;
+	}
+
+	bool IsZero(void) const { return x == 0.0f && y == 0.0f && z == 0.0f; }
+};
+
+inline CVector operator+(const CVector &left, const CVector &right)
+{
+	return CVector(left.x + right.x, left.y + right.y, left.z + right.z);
+}
+
+inline CVector operator-(const CVector &left, const CVector &right)
+{
+	return CVector(left.x - right.x, left.y - right.y, left.z - right.z);
+}
+
+inline CVector operator*(const CVector &left, float right)
+{
+	return CVector(left.x * right, left.y * right, left.z * right);
+}
+
+inline CVector operator*(float left, const CVector &right)
+{
+	return CVector(left * right.x, left * right.y, left * right.z);
+}
+
+inline CVector operator/(const CVector &left, float right)
+{
+	return CVector(left.x / right, left.y / right, left.z / right);
+}
+
+inline float
+DotProduct(const CVector &v1, const CVector &v2)
+{
+	return v1.x*v2.x + v1.y*v2.y + v1.z*v2.z;
+}
+
+CVector CrossProduct(const CVector &v1, const CVector &v2);
+
+inline float
+Distance(const CVector &v1, const CVector &v2)
+{
+	return (v2 - v1).Magnitude();
+}
+
+inline float
+Distance2D(const CVector &v1, const CVector &v2)
+{
+	float x = v2.x - v1.x;
+	float y = v2.y - v1.y;
+	return Sqrt(x*x + y*y);
+}
+
+class CMatrix;
+
+CVector Multiply3x3(const CMatrix &mat, const CVector &vec);
+CVector Multiply3x3(const CVector &vec, const CMatrix &mat);
+CVector operator*(const CMatrix &mat, const CVector &vec);