Vector Angles
<UserControl x:Class='SilverlightApplication3.MainPage'
xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'
xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'
xmlns:d='http://schemas.microsoft.com/expression/blend/2008'
xmlns:mc='http://schemas.openxmlformats.org/markup-compatibility/2006'
mc:Ignorable='d'
d:DesignWidth='640' d:DesignHeight='480'>
<Canvas x:Name="LayoutRoot" Background="White" Width="800" Height="600">
<TextBlock Text="TextBlock" TextWrapping="Wrap" Width="228.695" Height="85.537" Canvas.Top="506.463" Canvas.Left="560.305" x:Name="msgBlock"/>
<Path Height="1" Width="91.109" Canvas.Left="365" Canvas.Top="527" Data="M160,167 L384.10934,167" Fill="#FFFFFFFF" Stretch="Fill" Stroke="#FF000000" RenderTransformOrigin="0.5,0.5" x:Name="testLine">
<Path.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform x:Name="testLineAngle" Angle="0"/>
<TranslateTransform/>
</TransformGroup>
</Path.RenderTransform>
</Path>
<Slider Width="151" Canvas.Top="32" Canvas.Left="638" Maximum="100" x:Name="p1XSlider" SmallChange="1"/>
<TextBlock Text="Point 1 X:" TextWrapping="Wrap" Canvas.Top="8" Canvas.Left="638" x:Name="msgP1XSlider"/>
<Slider Width="151" Canvas.Top="92" Canvas.Left="638" Maximum="100" x:Name="p1YSlider" SmallChange="1"/>
<TextBlock Text="Point 1 Y:" TextWrapping="Wrap" Canvas.Top="68" Canvas.Left="638" x:Name="msgP1YSlider"/>
<Slider Width="151" Canvas.Top="147" Canvas.Left="638" Maximum="100" x:Name="p2XSlider" SmallChange="1"/>
<TextBlock Text="Point 2 X:" TextWrapping="Wrap" Canvas.Top="123" Canvas.Left="638" x:Name="msgP2XSlider"/>
<Slider Width="151" Canvas.Top="200" Canvas.Left="638" Maximum="100" x:Name="p2YSlider" SmallChange="1"/>
<TextBlock Text="Point 2 Y:" TextWrapping="Wrap" Canvas.Top="176" Canvas.Left="638" x:Name="msgP2YSlider"/>
<Border Height="600" Width="800" BorderThickness="1,1,1,1" BorderBrush="#FF000000"/>
</Canvas>
</UserControl>
//File: Page.xaml.cs
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
namespace SilverlightApplication3
{
public partial class MainPage : UserControl
{
Line myLine = new Line();
Point p1 = new Point();
Point p2 = new Point();
Point vectorLength = new Point();
double angle;
public MainPage()
{
InitializeComponent();
p1.X = 0;
p1.Y = 0;
p2.X = 250;
p2.Y = 250;
myLine.X1 = p1.X;
myLine.Y1 = p1.Y;
myLine.X2 = p2.X;
myLine.Y2 = p2.Y;
myLine.StrokeThickness = 1;
SolidColorBrush stroke = new SolidColorBrush();
stroke.Color = Colors.Black;
myLine.Stroke = stroke;
doAngle();
LayoutRoot.Children.Add(myLine);
p1XSlider.Maximum = p2XSlider.Maximum = LayoutRoot.Width;
p1YSlider.Maximum = p2YSlider.Maximum = LayoutRoot.Height;
p1XSlider.Value = myLine.X1;
p1YSlider.Value = myLine.Y1;
p2XSlider.Value = myLine.X2;
p2YSlider.Value = myLine.Y2;
msgP1XSlider.Text = "Point 1 X: " + (Int16)myLine.X1;
msgP1YSlider.Text = "Point 1 Y: " + (Int16)myLine.Y1;
msgP2XSlider.Text = "Point 2 X: " + (Int16)myLine.X2;
msgP2YSlider.Text = "Point 2 Y: " + (Int16)myLine.Y2;
p1XSlider.ValueChanged += new RoutedPropertyChangedEventHandler<double>(p1XSlider_ValueChanged);
p1YSlider.ValueChanged += new RoutedPropertyChangedEventHandler<double>(p1YSlider_ValueChanged);
p2XSlider.ValueChanged += new RoutedPropertyChangedEventHandler<double>(p2XSlider_ValueChanged);
p2YSlider.ValueChanged += new RoutedPropertyChangedEventHandler<double>(p2YSlider_ValueChanged);
}
private void p2YSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
{
myLine.Y2 = p2YSlider.Value;
msgP2YSlider.Text = "Point 2 Y: " + Convert.ToInt16(p2YSlider.Value);
doAngle();
}
private void p2XSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
{
myLine.X2 = p2XSlider.Value;
msgP2XSlider.Text = "Point 2 X: " + Convert.ToInt16(p2XSlider.Value);
doAngle();
}
private void p1YSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
{
myLine.Y1 = p1YSlider.Value;
msgP1YSlider.Text = "Point 1 Y: " + Convert.ToInt16(p1YSlider.Value);
doAngle();
}
private void p1XSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
{
myLine.X1 = p1XSlider.Value;
msgP1XSlider.Text = "Point 1 X: " + Convert.ToInt16(p1XSlider.Value);
doAngle();
}
private void doAngle()
{
vectorLength.X = myLine.X2 - myLine.X1;
vectorLength.Y = myLine.Y2 - myLine.Y1;
double radians = Math.Atan2(vectorLength.Y, vectorLength.X);
angle = Convert.ToInt16(180 / Math.PI * radians);
testLineAngle.Angle = angle;
msgBlock.Text = "Vector X,Y: " + Convert.ToInt16(vectorLength.X) + ", " + Convert.ToInt16(vectorLength.Y) + "\nAngle: " + angle;
}
}
}
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