056avatar: one of the solutions (Sevecek), will be modified.

git-svn-id: svn://cgg.mff.cuni.cz/grcis/trunk@209 c021de9b-3f10-4dc4-9d02-502951e1e0de

Author: pepcape

056avatar/Avatar-original.cs

@@ -0,0 +1,229 @@
+using System;
+using System.Drawing;
+using System.Windows.Forms;
+using OpenTK;
+using OpenTK.Graphics.OpenGL;
+
+namespace _056avatar
+{
+  public partial class Form1
+  {
+    // Realtime based animation:
+    private bool animate = true;
+    private double timeInSeconds = 0.0;
+    private double timeOffset = 0.0;
+
+    #region Camera attributes
+
+    /// <summary>
+    /// Current camera position.
+    /// </summary>
+    private Vector3 eye = new Vector3( 1.0f, 2.0f, 10.0f );
+
+    /// <summary>
+    /// Current point to look at.
+    /// </summary>
+    private Vector3 pointAt = Vector3.Zero;
+
+    /// <summary>
+    /// Current "up" vector.
+    /// </summary>
+    private Vector3 up = Vector3.UnitY;
+
+    /// <summary>
+    /// Vertical field-of-view angle in radians.
+    /// </summary>
+    private float fov = 1.0f;
+
+    /// <summary>
+    /// Camera's far point.
+    /// </summary>
+    private float far = 200.0f;
+
+    #endregion
+
+    #region Dynamics
+
+    private double lastFrameTime = DateTime.Now.Ticks * 1.0e-7;
+
+    /// <summary>
+    /// Current camera speed vector [1/sec].
+    /// </summary>
+    private Vector3 dEye = new Vector3( 0.4f, 0.0f, -0.8f );
+
+    /// <summary>
+    /// Second derivative of the camera position (used in mouse-wheel handler).
+    /// </summary>
+    private Vector3 ddEye = new Vector3( 0.2f, 0.0f, -0.4f );
+
+    /// <summary>
+    /// Current point-at speed vector [1/sec].
+    /// </summary>
+    private Vector3 dPointAt = Vector3.Zero;
+
+    #endregion
+
+    /// <summary>
+    /// Called in case the GLcontrol geometry changes.
+    /// </summary>
+    private void SetupViewport ()
+    {
+      int wid = glControl1.Width;
+      int hei = glControl1.Height;
+
+      // 1. set ViewPort transform:
+      GL.Viewport( 0, 0, wid, hei );
+
+      // 2. set projection matrix
+      GL.MatrixMode( MatrixMode.Projection );
+      Matrix4 proj = Matrix4.CreatePerspectiveFieldOfView( fov, wid / (float)hei, 0.1f, far );
+      GL.LoadMatrix( ref proj );
+    }
+
+    /// <summary>
+    /// Setup of a camera called for every frame prior to any rendering.
+    /// </summary>
+    private void SetCamera ()
+    {
+      // !!!{{ TODO: add camera setup here
+
+      // Animation based on simple linear dynamics:
+      timeInSeconds = DateTime.Now.Ticks * 1.0e-7;
+      if ( animate )
+      {
+        float dTime = (float)(timeInSeconds - lastFrameTime);
+        eye += dEye * dTime;
+        pointAt += dPointAt * dTime;
+      }
+      lastFrameTime = timeInSeconds;
+
+      // Current modelview matrix based on eye and pointAt position:
+      GL.MatrixMode( MatrixMode.Modelview );
+      Matrix4 lookAt = Matrix4.LookAt( eye, pointAt, up );
+      GL.LoadMatrix( ref lookAt );
+
+      // !!!}}
+    }
+
+    /// <summary>
+    /// Rendering of one frame.
+    /// </summary>
+    private void Render ()
+    {
+      if ( !loaded ) return;
+
+      frameCounter++;
+      GL.Clear( ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit );
+      GL.ShadeModel( checkSmooth.Checked ? ShadingModel.Smooth : ShadingModel.Flat );
+      GL.PolygonMode( MaterialFace.FrontAndBack, checkWireframe.Checked ? PolygonMode.Line : PolygonMode.Fill );
+
+      SetCamera();
+
+      // Scene rendering:
+      RenderScene();
+
+      glControl1.SwapBuffers();
+    }
+
+    #region 2D variant
+
+    private void SetupViewport2D ()
+    {
+      int wid = glControl1.Width;
+      int hei = glControl1.Height;
+
+      GL.MatrixMode( MatrixMode.Projection );
+      GL.LoadIdentity();
+      GL.Ortho( 0, wid, 0, hei, -1, 1 );
+      GL.Viewport( 0, 0, wid, hei );
+    }
+
+    private void Render2D ()
+    {
+      if ( !loaded ) return;
+
+      frameCounter++;
+      GL.Clear( ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit );
+
+      GL.MatrixMode( MatrixMode.Modelview );
+      GL.LoadIdentity();
+      GL.Translate( 200.0f, 200.0f, 0.0f );
+
+      // Animation:
+      if ( animate )
+        timeInSeconds = DateTime.Now.Ticks * 1.0e-7;
+      GL.Rotate( (float)Math.IEEERemainder( timeInSeconds * 45.0, 360.0 ), Vector3.UnitZ );
+
+      triangleCounter++;
+      GL.Color3( Color.Yellow );
+      GL.Begin( BeginMode.Triangles );
+      GL.Vertex3( -20.0f, -20.0f, 0.0f );
+      GL.Vertex3( 30.0f, -25.0f, 0.0f );
+      GL.Vertex3( 0.0f, 40.0f, 0.0f );
+      GL.End();
+
+      glControl1.SwapBuffers();
+    }
+
+    #endregion
+
+    private void glControl1_MouseDown ( object sender, MouseEventArgs e )
+    {
+      // !!!{{ TODO: add the event handler here
+      // !!!}}
+    }
+
+    private void glControl1_MouseUp ( object sender, MouseEventArgs e )
+    {
+      // !!!{{ TODO: add the event handler here
+      // !!!}}
+    }
+
+    private void glControl1_MouseMove ( object sender, MouseEventArgs e )
+    {
+      // !!!{{ TODO: add the event handler here
+      // !!!}}
+    }
+
+    private void glControl1_MouseWheel ( object sender, MouseEventArgs e )
+    {
+      // !!!{{ TODO: add the event handler here
+
+      if ( e.Delta != 0 )
+      {
+        float notches = e.Delta / 120.0f;
+        dEye += ddEye * notches;
+      }
+
+      // !!!}}
+    }
+
+    private void glControl1_KeyDown ( object sender, KeyEventArgs e )
+    {
+      // !!!{{ TODO: add the event handler here
+      // !!!}}
+    }
+
+    private void glControl1_KeyUp ( object sender, KeyEventArgs e )
+    {
+      // !!!{{ TODO: add the event handler here
+
+      if ( e.KeyCode == Keys.R )              // R => reset camera position
+      {
+        eye  = new Vector3( 1.0f, 2.0f, 10.0f );
+        dEye = Vector3.Zero;
+      }
+
+      if ( e.KeyCode == Keys.Space )          // space => toggle animation mode
+      {
+        if ( !animate )        // restart the animation
+          timeOffset += DateTime.Now.Ticks * 1.0e-7 - timeInSeconds;
+        animate = !animate;
+      }
+
+      // !!!}}
+    }
+
+  }
+
+}