package template

import "gopkg.in/Knetic/govaluate.v3"

type Position struct {
	X        *Value
	Y        *Value
	Rotation *Value
}

func (p Position) evaluate(
	params govaluate.MapParameters,
	funcs map[string]govaluate.ExpressionFunction,
) (x, y, rotation float64, err error) {
	x, err = p.X.Evaluate(params, funcs)
	if err != nil {
		return 0, 0, 0, err
	}

	y, err = p.Y.Evaluate(params, funcs)
	if err != nil {
		return 0, 0, 0, err
	}

	rotation, err = p.Rotation.Evaluate(params, funcs)
	if err != nil {
		return 0, 0, 0, err
	}

	return
}