aego/modules/physics/res/docs/try/PolygonCollider2D.aes

package demo

import (
    "aego/debug"
    "aego/physics"
)

// The outline follows the three actual polygon corners. The fixed-speed
// collision makes a change of restitution visible without changing the shape.
script PolygonImpact {
    func Ready() {
        node.Get<Body2D>().SetVelocity(Vec2{0, 15})
    }

    func Update(dt float) {
        p := node.WorldPosition()
        top := Vec2{p.X, p.Y - 0.8}
        right := Vec2{p.X + 0.8, p.Y + 0.6}
        left := Vec2{p.X - 0.8, p.Y + 0.6}
        color := Color{1, 0.65, 0.1, 1}
        // Several closely spaced strokes keep the exact outline readable in
        // the small embedded Game View as well as the native editor.
        for i := -2; i <= 2; i++ {
            x := float(i) * 0.08
            debug.Line(Vec2{top.X + x, top.Y}, Vec2{right.X + x, right.Y}, color)
            debug.Line(Vec2{right.X + x, right.Y}, Vec2{left.X + x, left.Y}, color)
            debug.Line(Vec2{left.X + x, left.Y}, Vec2{top.X + x, top.Y}, color)
        }
    }
}