本文整理汇总了C#中CGContext.AddCurveToPoint方法的典型用法代码示例。如果您正苦于以下问题：C# CGContext.AddCurveToPoint方法的具体用法？C# CGContext.AddCurveToPoint怎么用？C# CGContext.AddCurveToPoint使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类CGContext的用法示例。
在下文中一共展示了CGContext.AddCurveToPoint方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: DrawInContext
public override void DrawInContext (CGContext context)
{
// Drawing with a white stroke color
context.SetStrokeColor (1, 1, 1, 1);
// Draw them with a 2 stroke width so they are a bit more visible.
context.SetLineWidth (2);
// Draw a bezier curve with end points s,e and control points cp1,cp2
var s = new CGPoint (30, 120);
var e = new CGPoint (300, 120);
var cp1 = new CGPoint (120, 30);
var cp2 = new CGPoint (210, 210);
context.MoveTo (s.X, s.Y);
context.AddCurveToPoint (cp1.X, cp1.Y, cp2.X, cp2.Y, e.X, e.Y);
context.StrokePath ();
// Show the control points.
context.SetStrokeColor (1, 0, 0, 1);
context.MoveTo (s.X, s.Y);
context.AddLineToPoint (cp1.X, cp1.Y);
context.MoveTo (e.X, e.Y);
context.AddLineToPoint (cp2.X, cp2.Y);
context.StrokePath ();
// Draw a quad curve with end points s,e and control point cp1
context.SetStrokeColor (1, 1, 1, 1);
s = new CGPoint (30, 300);
e = new CGPoint (270, 300);
cp1 = new CGPoint (150, 180);
context.MoveTo (s.X, s.Y);
context.AddQuadCurveToPoint (cp1.X, cp1.Y, e.X, e.Y);
context.StrokePath ();
// Show the control point.
context.SetStrokeColor (1, 0, 0, 1);
context.MoveTo (s.X, s.Y);
context.AddLineToPoint (cp1.X, cp1.Y);
context.StrokePath ();
}示例2: make_arc
/*
* Based on the algorithm described in
* http://www.stillhq.com/ctpfaq/2002/03/c1088.html#AEN1212
*/
static void make_arc(CGContext graphics, bool start, float x, float y, float width,
float height, float startAngle, float endAngle, bool antialiasing, bool isPieSlice)
{
float delta, bcp;
double sin_alpha, sin_beta, cos_alpha, cos_beta;
float PI = (float)Math.PI;
float rx = width / 2;
float ry = height / 2;
/* center */
float cx = x + rx;
float cy = y + ry;
/* angles in radians */
float alpha = startAngle * PI / 180;
float beta = endAngle * PI / 180;
/* adjust angles for ellipses */
alpha = (float)Math.Atan2(rx * Math.Sin(alpha), ry * Math.Cos(alpha));
beta = (float)Math.Atan2(rx * Math.Sin(beta), ry * Math.Cos(beta));
if (Math.Abs(beta - alpha) > PI)
{
if (beta > alpha)
beta -= 2 * PI;
else
alpha -= 2 * PI;
}
delta = beta - alpha;
bcp = (float)(4.0 / 3.0 * (1 - Math.Cos(delta / 2)) / Math.Sin(delta / 2));
sin_alpha = Math.Sin(alpha);
sin_beta = Math.Sin(beta);
cos_alpha = Math.Cos(alpha);
cos_beta = Math.Cos(beta);
/* don't move to starting point if we're continuing an existing curve */
if (start)
{
/* starting point */
double sx = cx + rx * cos_alpha;
double sy = cy + ry * sin_alpha;
if (isPieSlice)
graphics.AddLineToPoint((float)sx,(float)sy);
else
graphics.MoveTo((float)sx,(float)sy);
}
graphics.AddCurveToPoint(cx + rx * (float)(cos_alpha - bcp * sin_alpha),
cy + ry * (float)(sin_alpha + bcp * cos_alpha),
cx + rx * (float)(cos_beta + bcp * sin_beta),
cy + ry * (float)(sin_beta - bcp * cos_beta),
cx + rx * (float)cos_beta, cy + ry * (float)sin_beta);
}