Esempio n. 1
0
		public static TweenFunc<float> CubicBezier (float mx1, float my1, float mx2, float my2) {
			var curve = new BezierCurveCubic(
				            new Vector2(0f, 0f),
				            new Vector2(1f, 1f),
				            new Vector2(mx1, my1),
				            new Vector2(mx2, my2)
			            );
			return (from, to, t) => {
				return from + (to - from) * curve.CalculatePoint(t).Y;
			};
		}
Esempio n. 2
0
        /// <summary>
        /// Tessellates the path.
        /// </summary>
        /// <param name="path">The path.</param>
        public void TessellatePath(PathGeometry path)
        {
            _vertexList.Clear();
            _tesselator.EmptyCache();
            _tesselator.BeginPolygon();

            switch(path.FillRule)
            {
                case FillRule.EvenOdd:
                    _tesselator.WindingRule = Tesselator.Tesselator.WindingRuleType.Odd;
                    break;
                case FillRule.Nonzero:
                    _tesselator.WindingRule = Tesselator.Tesselator.WindingRuleType.NonZero;
                    break;
                default:
                    throw new ArgumentOutOfRangeException();
            }

            foreach (var figure in path.Figures)
            {
                _tesselator.BeginContour();

                foreach (var seg in figure.Segments)
                {
                    if (seg is PolyLineSegment)
                    {
                        var polyline = seg as PolyLineSegment;
                        polyline.Points.ForEach(AddPoint);
                    }
                    else if (seg is LineSegment)
                    {
                        AddPoint((seg as LineSegment).Point);
                    }
                    else if (seg is PolyBezierSegment)
                    {
                        var polybezier = (PolyBezierSegment) seg;

                        var bezierCurve = new BezierCurve(polybezier.Points.Select(p => new Vector2((float) p.X, (float) p.Y)));

                        Enumerable
                            .Range(1, 10)
                            .Select(i => bezierCurve.CalculatePoint(1.0f/i))
                            .ForEach(p => AddPoint(new Point(p.X, p.Y)));
                    }
                    else if (seg is BezierSegment)
                    {
                        var polybezier = (BezierSegment)seg;

                        var bezierCurve = new BezierCurveCubic(
                            LastPoint(),
                            new Vector2((float) polybezier.Point3.X, (float) polybezier.Point3.Y),
                            new Vector2((float) polybezier.Point1.X, (float) polybezier.Point1.Y),
                            new Vector2((float) polybezier.Point2.X, (float) polybezier.Point2.Y)
                            );

                        Enumerable
                            .Range(1, 10)
                            .Select(i => bezierCurve.CalculatePoint(1.0f / i))
                            .ForEach(p => AddPoint(new Point(p.X, p.Y)));
                    }
                    else
                    {
                        throw new ApplicationException(string.Format("segment type {0} not supported.", seg));
                    }
                }
                _tesselator.EndContour();
            }
            _tesselator.EndPolygon();
        }