tins2023/src/engine/point.zig

const std = @import("std");
const PointF = @import("point_f.zig").PointF;

pub const Point = struct {
    x: i64,
    y: i64,

    pub const One = Point{ .x = 1, .y = 1 };
    pub const Zero = Point{ .x = 0, .y = 0 };

    pub fn init(x: i64, y: i64) Point {
        return Point{ .x = x, .y = y };
    }

    pub fn initUsize(x: usize, y: usize) Point {
        return Point.init(@as(i64, @intCast(x)), @as(i64, @intCast(y)));
    }

    pub fn add(self: Point, other: Point) Point {
        return Point{ .x = self.x + other.x, .y = self.y + other.y };
    }

    pub fn distance(self: Point, to: Point) i64 {
        return std.math.sqrt(self.distance2(to));
    }

    pub fn distance2(self: Point, to: Point) i64 {
        const dx = to.x - self.x;
        const dy = to.y - self.y;
        return dx * dx + dy * dy;
    }

    pub fn float(self: Point) PointF {
        return PointF{ .x = @as(f32, @floatFromInt(self.x)), .y = @as(f32, @floatFromInt(self.y)) };
    }

    pub fn multiply(self: Point, factor: i64) Point {
        return Point{ .x = self.x * factor, .y = self.y * factor };
    }

    pub fn subtract(self: Point, other: Point) Point {
        return Point{ .x = self.x - other.x, .y = self.y - other.y };
    }
};