www.pudn.com > IntroductionTo3DGameEngineDesign.rar > SkyBox.cs
using System;
using System.Drawing;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
namespace GameEngine
{
///
/// Face class for SkyBox
///
public class SkyFace : IDisposable
{
#region Attributes
private CustomVertex.PositionNormalTextured[] m_Corners;
private VertexBuffer m_VB = null; // Vertex buffer
private Texture m_Texture; // image for face
private bool m_bValid = false;
private string m_sName;
public bool Valid { get { return m_bValid; } }
#endregion
public SkyFace( string sName, SkyBox.Face face )
{
m_sName = sName;
// create the vertices for the box
m_Corners = new CustomVertex.PositionNormalTextured[4];
switch ( face )
{
case SkyBox.Face.Top:
m_Corners[0].X = -100.0f;
m_Corners[0].Y = 100.0f;
m_Corners[0].Z = -100.0f;
m_Corners[0].Tu = 0.0f;
m_Corners[0].Tv = 1.0f;
m_Corners[0].Nx = 0.0f;
m_Corners[0].Ny = -1.0f;
m_Corners[0].Nz = 0.0f;
m_Corners[1].X = 100.0f;
m_Corners[1].Y = 100.0f;
m_Corners[1].Z = -100.0f;
m_Corners[1].Tu = 0.0f;
m_Corners[1].Tv = 0.0f;
m_Corners[1].Nx = 0.0f;
m_Corners[1].Ny = -1.0f;
m_Corners[1].Nz = 0.0f;
m_Corners[2].X = -100.0f;
m_Corners[2].Y = 100.0f;
m_Corners[2].Z = 100.0f;
m_Corners[2].Tu = 1.0f;
m_Corners[2].Tv = 1.0f;
m_Corners[2].Nx = 0.0f;
m_Corners[2].Ny = -1.0f;
m_Corners[2].Nz = 0.0f;
m_Corners[3].X = 100.0f;
m_Corners[3].Y = 100.0f;
m_Corners[3].Z = 100.0f;
m_Corners[3].Tu = 1.0f;
m_Corners[3].Tv = 0.0f;
m_Corners[3].Nx = 0.0f;
m_Corners[3].Ny = -1.0f;
m_Corners[3].Nz = 0.0f;
break;
case SkyBox.Face.Bottom:
m_Corners[0].X = -100.0f; // nw
m_Corners[0].Y = -100.0f;
m_Corners[0].Z = 100.0f;
m_Corners[0].Tu = 0.0f;
m_Corners[0].Tv = 0.0f;
m_Corners[0].Nx = 0.0f;
m_Corners[0].Ny = 1.0f;
m_Corners[0].Nz = 0.0f;
m_Corners[1].X = 100.0f; // ne
m_Corners[1].Y = -100.0f;
m_Corners[1].Z = 100.0f;
m_Corners[1].Tu = 1.0f;
m_Corners[1].Tv = 1.0f;
m_Corners[1].Nx = 0.0f;
m_Corners[1].Ny = 1.0f;
m_Corners[1].Nz = 0.0f;
m_Corners[2].X = -100.0f; // sw
m_Corners[2].Y = -100.0f;
m_Corners[2].Z = -100.0f;
m_Corners[2].Tu = 1.0f;
m_Corners[2].Tv = 0.0f;
m_Corners[2].Nx = 0.0f;
m_Corners[2].Ny = 1.0f;
m_Corners[2].Nz = 0.0f;
m_Corners[3].X = 100.0f; // se
m_Corners[3].Y = -100.0f;
m_Corners[3].Z = -100.0f;
m_Corners[3].Tu = 0.0f;
m_Corners[3].Tv = 1.0f;
m_Corners[3].Nx = 0.0f;
m_Corners[3].Ny = 1.0f;
m_Corners[3].Nz = 0.0f;
break;
case SkyBox.Face.Front:
m_Corners[0].X = -100.0f; // upper nw
m_Corners[0].Y = 100.0f;
m_Corners[0].Z = 100.0f;
m_Corners[0].Tu = 0.0f;
m_Corners[0].Tv = 0.0f;
m_Corners[0].Nx = 0.0f;
m_Corners[0].Ny = 0.0f;
m_Corners[0].Nz = -1.0f;
m_Corners[1].X = 100.0f; // upper ne
m_Corners[1].Y = 100.0f;
m_Corners[1].Z = 100.0f;
m_Corners[1].Tu = 1.0f;
m_Corners[1].Tv = 0.0f;
m_Corners[1].Nx = 0.0f;
m_Corners[1].Ny = 0.0f;
m_Corners[1].Nz = -1.0f;
m_Corners[2].X = -100.0f; // lower nw
m_Corners[2].Y = -100.0f;
m_Corners[2].Z = 100.0f;
m_Corners[2].Tu = 0.0f;
m_Corners[2].Tv = 1.0f;
m_Corners[2].Nx = 0.0f;
m_Corners[2].Ny = 0.0f;
m_Corners[2].Nz = -1.0f;
m_Corners[3].X = 100.0f; // lower ne
m_Corners[3].Y = -100.0f;
m_Corners[3].Z = 100.0f;
m_Corners[3].Tu = 1.0f;
m_Corners[3].Tv = 1.0f;
m_Corners[3].Nx = 0.0f;
m_Corners[3].Ny = 0.0f;
m_Corners[3].Nz = -1.0f;
break;
case SkyBox.Face.Right:
m_Corners[0].X = 100.0f; // upper ne
m_Corners[0].Y = 100.0f;
m_Corners[0].Z = 100.0f;
m_Corners[0].Tu = 0.0f;
m_Corners[0].Tv = 0.0f;
m_Corners[0].Nx = -1.0f;
m_Corners[0].Ny = 0.0f;
m_Corners[0].Nz = 0.0f;
m_Corners[1].X = 100.0f; // upper se
m_Corners[1].Y = 100.0f;
m_Corners[1].Z = -100.0f;
m_Corners[1].Tu = 1.0f;
m_Corners[1].Tv = 0.0f;
m_Corners[1].Nx = -1.0f;
m_Corners[1].Ny = 0.0f;
m_Corners[1].Nz = 0.0f;
m_Corners[2].X = 100.0f; // lower ne
m_Corners[2].Y = -100.0f;
m_Corners[2].Z = 100.0f;
m_Corners[2].Tu = 0.0f;
m_Corners[2].Tv = 1.0f;
m_Corners[2].Nx = -1.0f;
m_Corners[2].Ny = 0.0f;
m_Corners[2].Nz = 0.0f;
m_Corners[3].X = 100.0f; // lower se
m_Corners[3].Y = -100.0f;
m_Corners[3].Z = -100.0f;
m_Corners[3].Tu = 1.0f;
m_Corners[3].Tv = 1.0f;
m_Corners[3].Nx = -1.0f;
m_Corners[3].Ny = 0.0f;
m_Corners[3].Nz = 0.0f;
break;
case SkyBox.Face.Back:
m_Corners[0].X = 100.0f; // upper se
m_Corners[0].Y = 100.0f;
m_Corners[0].Z = -100.0f;
m_Corners[0].Tu = 0.0f;
m_Corners[0].Tv = 0.0f;
m_Corners[0].Nx = 0.0f;
m_Corners[0].Ny = 0.0f;
m_Corners[0].Nz = -1.0f;
m_Corners[1].X = -100.0f; // upper sw
m_Corners[1].Y = 100.0f;
m_Corners[1].Z = -100.0f;
m_Corners[1].Tu = 1.0f;
m_Corners[1].Tv = 0.0f;
m_Corners[1].Nx = 0.0f;
m_Corners[1].Ny = 0.0f;
m_Corners[1].Nz = -1.0f;
m_Corners[2].X = 100.0f; // lower se
m_Corners[2].Y = -100.0f;
m_Corners[2].Z = -100.0f;
m_Corners[2].Tu = 0.0f;
m_Corners[2].Tv = 1.0f;
m_Corners[2].Nx = 0.0f;
m_Corners[2].Ny = 0.0f;
m_Corners[2].Nz = -1.0f;
m_Corners[3].X = -100.0f; // lower sw
m_Corners[3].Y = -100.0f;
m_Corners[3].Z = -100.0f;
m_Corners[3].Tu = 1.0f;
m_Corners[3].Tv = 1.0f;
m_Corners[3].Nx = 0.0f;
m_Corners[3].Ny = 0.0f;
m_Corners[3].Nz = -1.0f;
break;
case SkyBox.Face.Left:
m_Corners[0].X = -100.0f; // upper south
m_Corners[0].Y = 100.0f;
m_Corners[0].Z = -100.0f;
m_Corners[0].Tu = 0.0f;
m_Corners[0].Tv = 0.0f;
m_Corners[0].Nx = 1.0f;
m_Corners[0].Ny = 0.0f;
m_Corners[0].Nz = 0.0f;
m_Corners[1].X = -100.0f; // upper north
m_Corners[1].Y = 100.0f;
m_Corners[1].Z = 100.0f;
m_Corners[1].Tu = 1.0f;
m_Corners[1].Tv = 0.0f;
m_Corners[1].Nx = 1.0f;
m_Corners[1].Ny = 0.0f;
m_Corners[1].Nz = 0.0f;
m_Corners[2].X = -100.0f; // lower south
m_Corners[2].Y = -100.0f;
m_Corners[2].Z = -100.0f;
m_Corners[2].Tu = 0.0f;
m_Corners[2].Tv = 1.0f;
m_Corners[2].Nx = 1.0f;
m_Corners[2].Ny = 0.0f;
m_Corners[2].Nz = 0.0f;
m_Corners[3].X = -100.0f; // lower north
m_Corners[3].Y = -100.0f;
m_Corners[3].Z = 100.0f;
m_Corners[3].Tu = 1.0f;
m_Corners[3].Tv = 1.0f;
m_Corners[3].Nx = 1.0f;
m_Corners[3].Ny = 0.0f;
m_Corners[3].Nz = 0.0f;
break;
}
// load the texture for the face
try
{
m_Texture = GraphicsUtility.CreateTexture(CGameEngine.Device3D, sName);
m_bValid = true;
}
catch
{
Console.AddLine("Unable to create skybox texture for " + sName);
}
// Create a quad for rendering the face
m_VB = new VertexBuffer( typeof(CustomVertex.PositionNormalTextured), 4,
CGameEngine.Device3D, Usage.WriteOnly, CustomVertex.PositionNormalTextured.Format,
Pool.Default );
m_VB.Created += new System.EventHandler(this.CreateQuad);
CreateQuad(m_VB, null);
}
public void CreateQuad(object sender, EventArgs e)
{
VertexBuffer vb = (VertexBuffer)sender;
// Copy tree mesh data into vertexbuffer
vb.SetData(m_Corners, 0, 0);
}
public void Render()
{
if ( m_bValid )
{
Material mtrl = new Material();
mtrl.Ambient = Color.White;
mtrl.Diffuse = Color.White;
CGameEngine.Device3D.Material = mtrl;
CGameEngine.Device3D.SetStreamSource( 0, m_VB, 0 );
CGameEngine.Device3D.VertexFormat = CustomVertex.PositionNormalTextured.Format;
// Set the texture
CGameEngine.Device3D.SetTexture(0, m_Texture );
// Render the face
CGameEngine.Device3D.DrawPrimitives( PrimitiveType.TriangleStrip, 0, 2 );
}
}
public void Dispose()
{
m_Texture.Dispose();
if( m_VB != null )
m_VB.Dispose();
}
}
///
/// Summary description for SkyBox.
///
public class SkyBox : Object3D, IDisposable
{
#region Attributes
private SkyFace[] m_faces = new SkyFace[6];
public enum Face { Top, Bottom, Front, Right, Back, Left }
#endregion
public SkyBox( string sFront, string sRight, string sBack, string sLeft, string sTop, string sBottom )
: base( "SkyBox" )
{
// create the faces for the box
m_faces[0] = new SkyFace( sFront, Face.Front );
m_faces[1] = new SkyFace( sLeft, Face.Right );
m_faces[2] = new SkyFace( sBack, Face.Back );
m_faces[3] = new SkyFace( sRight, Face.Left );
m_faces[4] = new SkyFace( sTop, Face.Top );
m_faces[5] = new SkyFace( sBottom, Face.Bottom );
}
public override void Dispose()
{
for ( int i = 0; i < 6; i++ )
{
m_faces[i].Dispose();
}
}
public override void Render( Camera cam )
{
try
{
// Set the matrix for normal viewing
Matrix matWorld = new Matrix();
matWorld = Matrix.Identity;
// Center view matrix for skybox and disable zbuffer
Matrix matView;
matView = cam.View;
matView.M41 = 0.0f; matView.M42 = -0.3f; matView.M43 = 0.0f;
CGameEngine.Device3D.Transform.View = matView;
CGameEngine.Device3D.Transform.World = matWorld;
CGameEngine.Device3D.RenderState.ZBufferWriteEnable = false;
CGameEngine.Device3D.RenderState.CullMode = Microsoft.DirectX.Direct3D.Cull.None;
// pick faces based on camera attitude
if ( cam.Pitch > 0.0f )
{
m_faces[4].Render();
}
else if ( cam.Pitch < 0.0f )
{
m_faces[5].Render();
}
if ( cam.Heading > 0.0f && cam.Heading < 180.0 )
{
m_faces[1].Render();
}
if ( cam.Heading > 270.0f || cam.Heading < 90.0 )
{
m_faces[0].Render();
}
if ( cam.Heading > 180.0f && cam.Heading < 360.0 )
{
m_faces[3].Render();
}
if ( cam.Heading > 90.0f && cam.Heading < 270.0 )
{
m_faces[2].Render();
}
// Restore the render states
CGameEngine.Device3D.Transform.View = cam.View;
CGameEngine.Device3D.RenderState.ZBufferWriteEnable = true;
}
catch (DirectXException d3de)
{
Console.AddLine("Unable to render skybox ");
Console.AddLine(d3de.ErrorString);
}
catch ( Exception e )
{
Console.AddLine("Unable to render skybox ");
Console.AddLine(e.Message);
}
}
}
}