Class Vec

include/math.hpp:189–294

2-dimensional vector of floats, representing a point on the plane for graphics. */

/** 2-dimensional vector of floats, representing a point on the plane for graphics.
*/
struct Vec {
	float x = 0.f;
	float y = 0.f;

	Vec() {}
	Vec(float xy) : x(xy), y(xy) {}
	Vec(float x, float y) : x(x), y(y) {}

	float& operator[](int i) {
		return (i == 0) ? x : y;
	}
	const float& operator[](int i) const {
		return (i == 0) ? x : y;
	}
	/** Negates the vector.
	Equivalent to a reflection across the `y = -x` line.
	*/
	Vec neg() const {
		return Vec(-x, -y);
	}
	Vec plus(Vec b) const {
		return Vec(x + b.x, y + b.y);
	}
	Vec minus(Vec b) const {
		return Vec(x - b.x, y - b.y);
	}
	Vec mult(float s) const {
		return Vec(x * s, y * s);
	}
	Vec mult(Vec b) const {
		return Vec(x * b.x, y * b.y);
	}
	Vec div(float s) const {
		return Vec(x / s, y / s);
	}
	Vec div(Vec b) const {
		return Vec(x / b.x, y / b.y);
	}
	float dot(Vec b) const {
		return x * b.x + y * b.y;
	}
	float arg() const {
		return std::atan2(y, x);
	}
	float norm() const {
		return std::hypot(x, y);
	}
	Vec normalize() const {
		return div(norm());
	}
	float square() const {
		return x * x + y * y;
	}
	float area() const {
		return x * y;
	}
	/** Rotates counterclockwise in radians. */
	Vec rotate(float angle) {