gmtk24/scripts/Util.cs

using Godot;

namespace Gmtk24 {
    public static class Util {
        public static RaycastResult? RaycastFromMouse(Camera3D camera, uint mask = 0b11000) {
            var viewport = camera.GetViewport();
            var origin = camera.ProjectRayOrigin(viewport.GetMousePosition());
            var normal = camera.ProjectRayNormal(viewport.GetMousePosition()) * 10000;
            var ray = new PhysicsRayQueryParameters3D {
                From = origin,
                To = normal,
                CollideWithBodies = true,
                CollisionMask = mask,
                HitBackFaces = false,
                HitFromInside = false,
            };
            var results = camera.GetWorld3D().DirectSpaceState.IntersectRay(ray);
            if (results.ContainsKey("position")) {
                return new RaycastResult() {
                    Collider = (GodotObject)results["collider"],
                    Position = (Vector3)results["position"],
                    Normal = (Vector3)results["normal"],
                };
            }
            return null;
        }

    }

    public struct RaycastResult {
        public Vector3 Position;
        public Vector3 Normal;
        public GodotObject Collider;
    }
}