module main

import math.vec

pub struct Bezier {
pub mut:
    points [4]vec.Vec2[f32]
}

pub fn (b Bezier) h3() vec.Vec2[f32] {
    return b.points[2]
}

pub fn (b Bezier) h4() vec.Vec2[f32] {
    return b.points[3]
}

pub fn (b Bezier) end() vec.Vec2[f32] {
    return b.h4()
}

pub struct Path {
pub mut:
    segments [1024]Bezier
    len      int // should be read-only
}

pub fn (mut p Path) add(b Bezier) {
    assert p.len + 1 < 1024
    p.segments[p.len] = b
    p.len++
}

fn test_main() {
    b1 := Bezier{
        points: [vec.Vec2[f32]{100, 100}, vec.Vec2[f32]{120, 80},
            vec.Vec2[f32]{200, 70}, vec.Vec2[f32]{400, 200}]!
    }
    b2 := Bezier{
        points: [b1.end(), b1.h3() + vec.Vec2[f32]{0, 2 * 80}, vec.Vec2[f32]{200, 70},
            b1.end() + vec.Vec2[f32]{400, 200}]!
    }

    mut path := Path{}

    path.add(b1)
    path.add(b2)

    assert sizeof(path) == $if new_int ? && x64 {
        32776
    } $else {
        32772
    }
}