namespace VisionCommon {
    public class TransformScaleTranslation {
        public double ScaleX { get; set; } = 1;
        public double ScaleY { get; set; } = 1;
        public double TranslationX { get; set; } = 0;
        public double TranslationY { get; set; } = 0;

        public TransformScaleTranslation() {
        }

        public TransformScaleTranslation(
            double sourceWidth, double sourceHeight,
            double targetWidth, double targetHeight) {
            this.ScaleX = targetWidth / sourceWidth;
            this.ScaleY = targetHeight / sourceHeight;

            if (ScaleX < ScaleY) {
                ScaleY = ScaleX;
                TranslationX = 0;
                TranslationY = (targetHeight - (sourceHeight * ScaleX)) * 0.5;
            }
            else {
                ScaleX = ScaleY;
                TranslationX = (targetWidth - (sourceWidth * ScaleY)) * 0.5;
                TranslationY = 0;
            }
        }
    }
}