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Course 3D_MDX: 3D-Graphics with Managed DirectX 9.0
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 Project mesh_viewer1 Complete Program Exercises |
Main Menu after starting VS 2008: File → New Project... → Visual Studio installed templates: Windows Forms Application
Name: mesh_viewer1 → Location: C:\temp → Create directory for solution: switch it off → OK
Delete the files Program.cs and Form1.Designer.cs and the content of Form1.cs, as described in the chapters 2DCisC1 to 2DCisC4.
If You can't find a Solution Explorer-window, open it via the main menu: View → Solution Explorer.
Inside the Solution Explorer-window click the plus-sign in front of mesh_viewer1. A tree opens. Look for the branch "References". Right-click References and left-click Add Reference.... An Add Reference dialog box opens. Scroll down to the component name: Microsoft.DirectX Version 1.0.2902.0.
Highlight this reference by a left-click and (holding the Strg-key pressed) two more references:
Microsoft.DirectX.Direct3D Version 1.0.2902.0 and
Microsoft.DirectX.Direct3DX Version 1.0.2902.0 or 1.0.2903.0 or 1.0.2904.0.
Quit the Add Reference dialog box with OK.
Check if three references:
Microsoft.DirectX and
Microsoft.DirectX.Direct3D and
Microsoft.DirectX.Direct3DX are now visible inside the Solution Explorer window underneath
If You want to use DirectX Libs = References older than Version 1.0.2902.0 You'll obtain 3 error messages. The solution is simple: You have to delete the first parameter of the function calls in these lines:
mesh0 = Mesh.Clean( CleanType.Optimization, mesh0, adjacency, adjacency );
myfont.DrawText( null, "This mesh has " ...
myfont.DrawText( null, "divided into " ...
i.e. You have to delete the parameters CleanType.Optimization, null, and null, and the program will run.
This chapter requires that C:\DXSDK\Samples\Media\Tiger\tiger.x and C:\DXSDK\Samples\Media\Tiger\tiger.bmp and other 13 mesh- and texture-files are located in specific paths.. In case these files are somewhere else, You have to change the string static String s = @"C:\DXSDK\Samples\"; in the head of Form1.
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Write the following code into the empty Form1.cs:
using System;
using System.Drawing;
using System.Windows.Forms;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
public class Form1 : Form
{ [STAThread] static void Main() { Application.Run( new Form1() ); }
static Device device;
static float xAngle, yAngle, zAngle;
static Mesh mesh0, mesh1;
static ExtendedMaterial[] materials;
static Microsoft.DirectX.Direct3D.Font myfont;
struct m{ public String title; public String mesh; public String texture; public Int32 eyedistance;
public m(String a, String b, String c, Int32 d) //Constructor
{ title = a; mesh = b; texture = c; eyedistance = d; }
};
static String s = @"C:\DXSDK\Samples\";
static m[] meshes =
{ new m("tiger" ,s+@"Media\Tiger\tiger.x" ,s+@"Media\Tiger\tiger.bmp", 5),
new m("bigship",s+@"Media\misc\bigship1.x" ,s+@"Media\Tiger\tiger.bmp", 50),
new m("knot" ,s+@"Media\misc\knot.x" ,s+@"Media\Tiger\tiger.bmp", 5),
new m("shapes" ,s+@"Media\misc\shapes1.x" ,s+@"Media\Earth\earth.bmp", 50),
new m("scull" ,s+@"Media\misc\skullocc.x" ,s+@"Media\Tiger\tiger.bmp", 50),
new m("shark" ,s+@"Media\Prt Demo\LandShark.x" ,s+@"Media\Tiger\tiger.bmp",1000),
new m("car" ,s+@"C++\Direct3D\EffectParam\car2.x",s+@"C++\Direct3D\EffectParam\EffectParam.jpg",2000),
new m("tiny" ,s+@"Media\Tiny\tiny.x" ,s+@"Media\Tiger\tiger.bmp",2000),
new m("dwarf" ,s+@"Media\Dwarf\dwarf.x" ,s+@"Media\Tiger\tiger.bmp", 10),
new m("airplan",s+@"Media\Airplane\airplane 2.x" ,s+@"Media\Airplane\bihull.bmp",50),
new m("headsad",s+@"Media\Prt Demo\Head_Sad.x" ,s+@"Media\Tiger\tiger.bmp",1000),
new m("virus" ,s+@"C++\Direct3D\EffectParam\cytovirus.x",s+@"Media\Tiger\tiger.bmp",2000)
};
String myMeshFile = meshes[0].mesh;
String myTextureFile = meshes[0].texture;
Bitmap myBitmap = null;
BaseTexture myTexture = null;
GraphicsStream adjacency = null;
GroupBox group = new GroupBox();
RadioButton[] radio = new RadioButton[meshes.Length];
TrackBar[] track = new TrackBar[2];
Label[] label = new Label[2];
TextBox[] text = new TextBox[2];
CheckBox check = new CheckBox();
Panel panel = new Panel();
Timer myTimer = new Timer();
public Form1()
{ Text = "Mesh Viewer";
for ( int i = 0; i < track.Length; i++ )
{ label[i] = new Label(); Controls.Add( label[i] );
track[i] = new TrackBar(); Controls.Add( track[i] );
text [i] = new TextBox(); Controls.Add( text [i] );
label[i].BackColor = track[i].BackColor = Color.Gray;
track[i].Minimum = 1;
track[i].TickStyle = TickStyle.None;
label[i].TextAlign = ContentAlignment.MiddleCenter;
text [i].TextAlign = HorizontalAlignment.Center;
}
Controls.Add( group );
for ( int i = 0; i < meshes.Length; i++ )
{ radio[i] = new RadioButton(); Controls.Add( radio[i] );
radio[i].Parent = group;
radio[i].Text = meshes[i].title;
radio[i].Location = new Point( 5, Convert.ToInt32((0.6 + i*1.2)*FontHeight) );
radio[i].Size = new Size( 60, Convert.ToInt32(1.2*Font.Height) );
radio[i].TextAlign = ContentAlignment.MiddleCenter;
radio[i].CheckedChanged += new EventHandler( radio_changed );
}
label[0].Text = "Reduce Vertices"; label[1].Text = "Eye Distance";
Controls.Add( check );
Controls.Add( panel );
track[0].MouseUp += new MouseEventHandler( track0_MouseUp );
track[1].MouseUp += new MouseEventHandler( track1_MouseUp );
check .CheckedChanged += new EventHandler( check_changed );
myTimer.Tick += new EventHandler( OnTimer );
myTimer.Interval = 1;
myBitmap = (Bitmap)Image.FromFile( meshes[0].texture );
track[1].Value = track[1].Maximum = meshes[0].eyedistance;
ClientSize = new Size( 1024, 800 ); //calls OnResize( ... )
}
protected override void OnResize( System.EventArgs e )
//Whenever the window changes we have to initialize Direct3D from scratch
{ myTimer.Stop();// stop the timer during initialization
for ( int i = 0; i < track.Length; i++ )
label[i].Width = track[i].Width = text[i].Width = ClientSize.Width / 10;
text[0].Text = "vertices = " + track[0].Value.ToString();
text[1].Text = "eye = - " + track[1].Value.ToString();
check .Text = "Wire Frame";
group.Size = new Size( ClientSize.Width / 10, meshes.Length*radio[0].Height + 6 );
check.Size = new Size( ClientSize.Width / 10, radio[0].Height );
panel.Size = new Size( ClientSize.Width - label[0].Width - 2, ClientSize.Height - 2 );
group .Location = new Point( 2, 1 );
label[0].Location = new Point( 2, group .Location.Y + group .Height + 20 );
track[0].Location = new Point( 2, label[0].Location.Y + label[0].Height + 1 );
text [0].Location = new Point( 2, track[0].Location.Y + track[0].Height + 2 );
label[1].Location = new Point( 2, text[ 0].Location.Y + text [0].Height + 20 );
track[1].Location = new Point( 2, label[1].Location.Y + label[1].Height + 1 );
text [1].Location = new Point( 2, track[1].Location.Y + track[1].Height + 2 );
check .Location = new Point( 2, text [1].Location.Y + text [1].Height + 20 );
panel .Location = new Point( 2 + group.Width + 2, group.Location.Y );
try
{ PresentParameters presentParams = new PresentParameters();
presentParams.Windowed = true;
presentParams.SwapEffect = SwapEffect.Discard;
presentParams.EnableAutoDepthStencil = true;
presentParams.AutoDepthStencilFormat = DepthFormat.D16;
if ( device != null ) device.Dispose();
device = new Device( 0, DeviceType.Hardware, panel,
CreateFlags.MixedVertexProcessing, presentParams );
//turn on some white directional light from left to right
device.Lights[0].Type = LightType.Directional;
device.Lights[0].Diffuse = Color.White;
device.Lights[0].Direction = new Vector3( 1, 0, 0 );
device.Lights[0].Enabled = true;
Material myMaterial = new Material();
myMaterial.Diffuse = myMaterial.Ambient = Color.White;
device.Material = myMaterial;
device.RenderState.Ambient = Color.FromArgb( 0x00303030 );
device.Transform.Projection = Matrix.PerspectiveFovLH( (float)Math.PI/4, 1f, 1f, 5000f );
device.Transform.View = Matrix.LookAtLH(
new Vector3( 0f, 0f, -track[1].Value ),
new Vector3( 0f,0f,0f ),
new Vector3( 0f,1f,0f ) );
device.RenderState.Lighting = true;
if ( check.Checked ) device.RenderState.FillMode = FillMode.WireFrame;
else device.RenderState.FillMode = FillMode.Solid;
myfont = new Microsoft.DirectX.Direct3D.Font(
device, new System.Drawing.Font( "Arial", 12, FontStyle.Bold ) );
SetUpMesh();
SetUpTexture();
myTimer.Start();
}
catch (DirectXException) { MessageBox.Show("Could not initialize Direct3D." ); return; }
}
private void SetUpMesh()
{ Cursor.Current = Cursors.WaitCursor; //change mouse pointer to hour glass
if ( mesh0 != null ) mesh0 .Dispose(); //free the old mesh if any
mesh0 = Mesh.FromFile( myMeshFile, MeshFlags.Managed, device, out adjacency, out materials );
mesh0 = Mesh.Clean( CleanType.Optimization, mesh0, adjacency, adjacency );
if ( mesh1 != null ) mesh1.Dispose(); //free the old mesh if any
//make a copy mesh1 from mesh0
mesh1 = mesh0.Clone( mesh0.Options.Value, mesh0.VertexFormat | VertexFormats.Normal, device );
//if mesh0 has no normals, compute them within mesh1 and copy them back to mesh0
if ( (mesh0.VertexFormat & VertexFormats.Normal) == 0 )
{ mesh1.ComputeNormals();
mesh0.Dispose();
mesh0 = mesh1.Clone( mesh1.Options.Value, mesh1.VertexFormat, device );
}
track[0].Value = track[0].Maximum = mesh0.NumberVertices;
text[0].Text = "vertices = " + track[0].Value.ToString();
Cursor.Current = Cursors.Arrow; //change mouse pointer back to normal arrow
}
private void SetUpTexture()
{ if ( myTexture != null ) myTexture.Dispose(); //free the old texture if any
myTexture = new Texture( device, myBitmap, 0, Pool.Managed );
device.SetTexture( 0, myTexture );
}
protected static void OnTimer( Object myObject, EventArgs myEventArgs )
{ device.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Gray, 1f, 0);
device.Transform.World = Matrix.RotationYawPitchRoll( yAngle += 0.02f,
xAngle += 0.02f,
zAngle += 0.02f );
device.BeginScene();
for ( int i=0; i < materials.Length; i++ ) mesh1.DrawSubset( i );
myfont.DrawText( null, "This mesh has " + mesh1.NumberVertices.ToString() + " vertices",
new Rectangle( 0, 0, 100, 20 ), DrawTextFormat.NoClip, Color.Red );
myfont.DrawText( null, "divided into " + materials.Length.ToString() + " subsets",
new Rectangle( 0, 20, 100, 20 ), DrawTextFormat.NoClip, Color.Red );
device.EndScene();
device.Present(); //show the canvas
}
private void radio_changed( Object sender, EventArgs e )
{ RadioButton radio = (RadioButton)sender;
Int32 i;
for ( i = 0; i < meshes.Length; i++ )
if ( meshes[i].title == radio.Text ) break;
if ( myMeshFile != meshes[i].mesh )
{ myMeshFile = meshes[i].mesh;
SetUpMesh();
}
if ( myTextureFile != meshes[i].texture )
{ myBitmap = (Bitmap)Image.FromFile( myTextureFile = meshes[i].texture );
SetUpTexture();
}
track[1].Value = track[1].Maximum = meshes[i].eyedistance;
text [1].Text = "eye = - " + track[1].Value.ToString();
device.Transform.View = Matrix.LookAtLH(
new Vector3( 0f, 0f, -meshes[i].eyedistance ),
new Vector3( 0f,0f,0f ),
new Vector3( 0f,1f,0f ) );
}
private void track0_MouseUp(object sender, System.EventArgs e) //Reduce no. of vertices
{ if ( materials.Length > 1 )
{ MessageBox.Show( "This mesh has more than one subset. It can't be simplified !" );
track[0].Value = track[0].Maximum;
return;
}
Cursor.Current = Cursors.WaitCursor;
if ( mesh1 != null ) mesh1.Dispose();
try { mesh1 = Mesh.Simplify( mesh0, adjacency, null, track[0].Value, MeshFlags.SimplifyVertex ); }
catch { mesh1 = mesh0.Clone( mesh0.Options.Value, mesh0.VertexFormat, device );
MessageBox.Show( "This mesh cannot be simplified !" );
}
track[0].Value = mesh1.NumberVertices;
text[0].Text = "vertices = " + mesh1.NumberVertices.ToString();
Cursor.Current = Cursors.Default;
}
private void track1_MouseUp(object sender, System.EventArgs e)//Eye Distance
{ device.Transform.View = Matrix.LookAtLH(
new Vector3( 0f, 0f, -track[1].Value ), //eye point in front of the canvas
new Vector3( 0f, 0f, 0f ), //camera looks at point 0,0,0
new Vector3( 0f, 1f, 0f ) ); //world's up direction is the y-axis
text[1].Text = "eye = - " + track[1].Value.ToString();
}
private void check_changed( Object sender, EventArgs e ) //Wire Frame on/off
{ if ( check.Checked ) device.RenderState.FillMode = FillMode.WireFrame;
else device.RenderState.FillMode = FillMode.Solid;
}
}
Click Debug → Start Without Debugging Ctrl F5.
If You used DirectX Libs = References older than Version 1.0.2902.0 You obtain 3 error messages. The solution is simple: You have to delete the first parameter of the function calls in these lines:
mesh0 = Mesh.Clean( CleanType.Optimization, mesh0, adjacency, adjacency );
myfont.DrawText( null, "This mesh has " ...
myfont.DrawText( null, "divided into " ...
i.e. You have to delete the parameters CleanType.Optimization, null, and null, and the program will run.
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1. Add another trackbar which shifts the x-axis rotation increment between 0 and 0.02.
2. Add another two trackbars which shift the y-axis and z-axis rotation increment between 0 and 0.02.
3. Add fourth trackbar which shifts the eye point in z-direction from -2000 to +2000.
4. Reduce automatically the no. of vertices, when the eye point moves away and the level of details can be reduced
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