public static IEnumerable <VertexData> GetVertexIter(this Curve4Div curve)
{
ArrayList <Vector2> m_points = curve.GetInternalPoints();
VertexData vertexData = new VertexData();
vertexData.command = VertexCmd.MoveTo;
vertexData.position = m_points[0];
yield return(vertexData);
vertexData.command = VertexCmd.LineTo;
for (int i = 1; i < m_points.Count; i++)
{
vertexData.position = m_points[i];
yield return(vertexData);
}
vertexData.command = VertexCmd.NoMore;
vertexData.position = new Vector2();
yield return(vertexData);
}
static void CreateBezierVxs4(VertexStore vxs,
double x0, double y0,
double x1, double y1,
double x2, double y2,
double x3, double y3)
{
//1. subdiv technique
s_curve4Div.Init(x0, y0, x1, y1, x2, y2, x3, y3);
ArrayList <Vector2> points = s_curve4Div.GetInternalPoints();
int n = 0;
for (int i = points.Length - 1; i >= 0; --i)
{
Vector2 p = points[n++];
vxs.AddLineTo(p.x, p.y);
}
//----------------------------------------
//2. old tech -- use incremental
//var curve = new VectorMath.BezierCurveCubic(
// start, end,
// control1, control2);
//vxs.AddLineTo(start.x, start.y);
//float eachstep = (float)1 / NSteps;
//float stepSum = eachstep;//start
//for (int i = NSteps - 1; i >= 0; --i)
//{
// var vector2 = curve.CalculatePoint(stepSum);
// vxs.AddLineTo(vector2.x, vector2.y);
// stepSum += eachstep;
//}
//vxs.AddLineTo(end.x, end.y);
}