Permalink
Browse files

[Examples] Improved MouseCursor example

  • Loading branch information...
1 parent 9ee728d commit 9bd94c1f13bef9abe1c4236e3a202fb13324ca62 @thefiddler thefiddler committed May 1, 2014
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
@@ -3,6 +3,7 @@
// It is provided "as is" without express or implied warranty of any kind.
using System;
+using System.Collections.Generic;
using System.Drawing;
using OpenTK;
using OpenTK.Graphics.OpenGL;
@@ -17,6 +18,7 @@ namespace Examples.Tutorial
public class MouseCursorSimple : GameWindow
{
readonly MouseCursor MyCursor;
+ List<Vector2> lines = new List<Vector2>();
public MouseCursorSimple()
: base(800, 600)
@@ -26,16 +28,57 @@ public MouseCursorSimple()
using (Bitmap bitmap = new Bitmap("Data/Textures/cursor.png"))
{
var data = bitmap.LockBits(
- new Rectangle(0, 0, bitmap.Width, bitmap.Height),
+ new Rectangle(2, 21, bitmap.Width, bitmap.Height),
System.Drawing.Imaging.ImageLockMode.ReadOnly,
System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
MyCursor = new OpenTK.MouseCursor(
0, 0, data.Width, data.Height, data.Scan0);
Cursor = MyCursor;
}
+
+ Mouse.Move += Mouse_Move;
+ Mouse.ButtonDown += Mouse_ButtonDown;
+ }
+
+ void AddLine(float x, float y)
+ {
+ // Scale mouse coordinates from
+ // (0, 0):(Width, Height) to
+ // (-1, -1):(+1, +1)
+ // Note, we must flip the y-coordinate
+ // since mouse is reported with (0, 0)
+ // at top-left and our projection uses
+ // (-1, -1) at bottom left.
+ x = (x- Width) / (float)Width;
+ y = (Height - y) / (float)Height;
+ lines.Add(new Vector2(2 * x + 1, 2 * y - 1));
+ }
+
+ #region Mouse_ButtonDown
+
+ void Mouse_ButtonDown(object sender, MouseButtonEventArgs e)
+ {
+ if (e.Button == MouseButton.Left)
+ {
+ AddLine(e.X, e.Y);
+ }
+ }
+
+ #endregion
+
+ #region Mouse_Move
+
+ void Mouse_Move(object sender, MouseMoveEventArgs e)
+ {
+ if (Mouse[MouseButton.Left])
+ {
+ AddLine(e.X, i.Y);
+ }
}
+ #endregion
+
#region Keyboard_KeyDown
/// <summary>
@@ -144,6 +187,14 @@ protected override void OnRenderFrame(FrameEventArgs e)
GL.End();
+ GL.Begin(PrimitiveType.LineStrip);
+ foreach (var p in lines)
+ {
+ GL.Color4(Color.White);
+ GL.Vertex2(p);
+ }
+ GL.End();
+
this.SwapBuffers();
}

0 comments on commit 9bd94c1

Please sign in to comment.