【发布时间】:2012-10-03 14:28:03
【问题描述】:
我的编程技术不太好,他们对 C# 还是很业余 我想问一下 Draw_Context 我在这里做的是找出关节之间的角度......我想做的是当角度在 70 到 90 之间时计时器开始并使用 Drawcontext.DrawText 方法在屏幕上显示任何消息 但如您所见,我无法访问 on_time_event 中的绘图变量 如果我尝试引入 DrawContext 的新变量并为其分配 draw 值...它给出了异常...因为 Draw 上下文的新变量从未分配过值 我应该怎么办? 请在这方面提供任何帮助,我将非常有帮助
class angle
{
System.Timers.Timer timer = new System.Timers.Timer();
bool timer_start = false;
int index = 5;
public DrawingContext draw_contex;
public void angle_between_left_shoulder(Skeleton sk1, DrawingContext draw, JointType
Shoulder_cntre,
JointType Shoulder_left, JointType Elbow_left, KinectSensor sen)
{
//draw_contex= draw;
Joint sh_cntr = sk1.Joints[Shoulder_cntre];
Joint sh_left = sk1.Joints[Shoulder_left];
Joint elb_left = sk1.Joints[Elbow_left];
Vector3 v_shoulder = new Vector3(sh_cntr.Position.X, sh_left.Position.Y,
sh_cntr.Position.Z);
Vector3 v_should_l = new Vector3(sh_left.Position.X, sh_left.Position.Y,
sh_left.Position.Z);
Vector3 v_elbow_l = new Vector3(elb_left.Position.X, elb_left.Position.Y,
elb_left.Position.Z);
Vector3 va = v_shoulder - v_should_l;
Vector3 vb = v_elbow_l - v_should_l;
va = Vector3.Normalize(va);
vb = Vector3.Normalize(vb);
float len_prod = va.Length() * va.Length();
float dot_pro = Vector3.Dot(va, vb);
double angle = Math.Acos(dot_pro);
angle = angle * 180 / Math.PI;
angle = 180 - angle;
System.Windows.Point shoul_l = this.point_toScreen(sh_left.Position, sen);
draw.DrawText(new FormattedText(angle.ToString("0"), new
System.Globalization.CultureInfo("en-us"),
FlowDirection.LeftToRight,
new Typeface("Verdana"), 16, Brushes.OrangeRed),
new System.Windows.Point(shoul_l.X+10, shoul_l.Y +20));
if (angle > 70 && angle < 90)
{
if (timer_start == false)
{
timer.Interval = 2000;
timer.Start();
timer.Elapsed += new ElapsedEventHandler(on_time_event);
}
}
}
void on_time_event(object sender, ElapsedEventArgs e)
{
--index;
if (index != 0)
{
MessageBox.Show(index.ToString());
/*
draw_contex.DrawText(new FormattedText(index.ToString("0"), new
System.Globalization.CultureInfo("en-us"),
FlowDirection.LeftToRight,
new Typeface("Verdana"), 16, Brushes.OrangeRed),
new System.Windows.Point(10, 120));
}
else
{
timer.Stop();
}
【问题讨论】:
标签: c# kinect drawingcontext