Created
December 17, 2022 17:35
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| struct Vector3 { | |
| union { float x; float r; }; | |
| union { float y; float g; }; | |
| union { float z; float b; }; | |
| // return a normalized vector | |
| static Vector3 Normalize(const Vector3& v) { | |
| float magnitude = Vector3::Magnitude(v); | |
| return v * (1 / magnitude); | |
| } | |
| // return the magnitude of v | |
| static float Magnitude(const Vector3& v) { | |
| return std::sqrt(v.x * v.x + v.y * v.y + v.z * v.z); | |
| } | |
| // return the dot product of a and b | |
| static float DotProduct(const Vector3& a, const Vector3& b) { | |
| return a.x * b.x + a.y * b.y + a.z * b.z; | |
| } | |
| // return the cross product of a and b | |
| static Vector3 CrossProduct(const Vector3& a, const Vector3& b) { | |
| return Vector3 { | |
| a.y * b.z - a.z * b.y, | |
| a.z * b.x - a.x * b.z, | |
| a.x * b.y - a.y * b.x | |
| }; | |
| } | |
| Vector3 operator+(const Vector3& other) const { | |
| return Vector3{ | |
| x + other.x, | |
| y + other.y, | |
| z + other.z, | |
| }; | |
| } | |
| Vector3 operator-(const Vector3& other) const { | |
| return Vector3{ | |
| x - other.x, | |
| y - other.y, | |
| z - other.z, | |
| }; | |
| } | |
| // return a vector scaled by scalar | |
| Vector3 operator*(const float& scalar) const { | |
| return Vector3{ | |
| x * scalar, | |
| y * scalar, | |
| z * scalar, | |
| }; | |
| } | |
| friend std::ostream& operator<<(std::ostream& out, const Vector3& v) { | |
| return (out << "Vector3(x=" << v.x << ", y=" << v.y << ", z=" << v.z << ")"); | |
| } | |
| }; |
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