Environment mapping with DirectX8.1?

#1

I have a mesh loaded up like so

Public Sub Create350ZMesh()
    
    Dim xfName As String
    Dim nMaterials As Long
    Dim mtrlBuffer As D3DXBuffer
    Dim meshMat As D3DMATERIAL8
    Dim i As Long
    
    GameDebugger.WriteLine "Loading 350Z into memory"
    
    UpdateProgressbar "Loading 350Z Mesh", 0
    
    OnLoadStep = 0
    
    With Car350Z
        
        'load the body mesh to .body
        xfName = App.Path & "\Models\350Z.x"
        Set .Body = d3dx.LoadMeshFromX(xfName, D3DXMESH_MANAGED, d3dDevice, Nothing, mtrlBuffer, nMaterials)
        OnLoadStep = OnLoadStep + 1
        UpdateProgressbar "Loading 350Z Mesh", OnLoadStep
        
        'apply any textures the body requires
        ReDim .BodyTexture(nMaterials)
        ReDim .BodyTextureName(nMaterials)
        ReDim .BodyMaterial(nMaterials)
        .Bodymaterials = nMaterials
        For i = 0 To nMaterials - 1
            OnLoadStep = OnLoadStep + 1
            UpdateProgressbar "Loading 350Z Mesh", OnLoadStep
            d3dx.BufferGetMaterial mtrlBuffer, i, meshMat
            meshMat.Ambient = meshMat.diffuse
            .BodyMaterial(i) = meshMat
            xfName = d3dx.BufferGetTextureName(mtrlBuffer, i)
            .BodyTextureName(i) = xfName
            d3dDevice.SetTextureStageState 0, D3DTSS_COLOROP, D3DTOP_SELECTARG1
            If Len(xfName) > 0 Then
                Set .BodyTexture(i) = d3dx.CreateTextureFromFile(d3dDevice, App.Path & "\Models\" & xfName)
            End If
        Next i
    
    GameDebugger.WriteLine "Loaded 350Z into memory finished without error"
    
End Sub

The mesh is of the type

Private Type ModelMesh
    Body As D3DXMesh
    BackTires As D3DXMesh
    FrontPassengerTire As D3DXMesh
    FrontDriverTire As D3DXMesh
    BodyTexture() As Direct3DTexture8
    BodyReflection As Direct3DTexture8
    TireBump As Direct3DTexture8
    BackTiresTexture() As Direct3DTexture8
    FrontDriverTireTexture() As Direct3DTexture8
    FrontPassengerTexture() As Direct3DTexture8
    BodyTextureName() As String
    BackTiresTextureName() As String
    FrontDriverTireTextureName() As String
    FrontPassengerTextureName() As String
    BodyMaterial() As D3DMATERIAL8
    BackTiresMaterial() As D3DMATERIAL8
    FrontDriverMaterial() As D3DMATERIAL8
    FrontPassengerMaterial() As D3DMATERIAL8
    Bodymaterials As Long
    BackTiresmaterials As Long
    FrontDrivermaterials As Long
    FrontPassengermaterials As Long
    UnitMeshName As String
End Type

Its rendered in the render loop by

With Car350Z
            'draw the body
            D3DXMatrixIdentity matTemp
            D3DXMatrixRotationY matTemp, .Rotation
            D3DXMatrixTranslation matTrans, .X, .Y, .z
            D3DXMatrixMultiply matTemp, matTemp, matTrans
            d3dDevice.SetTransform D3DTS_WORLD, matTemp
            For i = 0 To .Bodymaterials - 1
                d3dDevice.SetMaterial .BodyMaterial(i)
                d3dDevice.SetTexture 0, .BodyTexture(i)
                .Body.DrawSubset i
            Next i
     End With

I’ve been looking around at the MSDN archive but its so elusive. Any ideas? I’m hoping I can load a environment map and apply it to the model much like a regular texture map. Is that possible?

#2

Maybe U will find the “sphere mapping” useful. There’s a sample in the Dx SDK named “SphereMap Sample”

#3

Wow this is even better then I was expecting. Except I was only able to dig up a .net version of the dx sdk. I guess its time to bone up on it so I can translate it to plain old vb. Thanks for the helping hand.

#4

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