LightFixed Class

Represents a set of lighting properties. This class cannot be inherited.

Namespace: Microsoft.WindowsMobile.DirectX.Direct3D
Assembly: Microsoft.WindowsMobile.DirectX (in microsoft.windowsmobile.directx.dll)

Syntax

'Declaration
Public NotInheritable Class LightFixed
'Usage
Dim instance As LightFixed

public sealed class LightFixed

public ref class LightFixed sealed

public final class LightFixed

public final class LightFixed

Not applicable.

Remarks

This class provides support for fixed-point math operations.

Example

The following code example shows how to use LightFixed structures.

' This code example is from the 
' Direct3D Mobile Fixed Point Lighting Sample
' of the .NET Compact Framework Samples in the SDK.

' The FrameMove method is called once per frame, 
' and is the entry point for animating the scene.

Public Sub FrameMove()
    lightData = device.LightsFixed(2)

    ' Rotate through the various light types
    If Fix(appTime) Mod 20 < 10 Then
        device.LightsFixed(2).Type = LightType.Point
    Else
        device.LightsFixed(2).Type = LightType.Directional
    End If

    ' Make sure the light type is supported by the device.  If 
    ' VertexProcessingCaps.PositionAllLights is not set, the device
    ' does not support point or spot lights, so change light #2's
    ' type to a directional light.
    If Not _
     device.DeviceCaps.VertexProcessingCaps.SupportsPositionalLights _
        Then
        If device.LightsFixed(2).Type = LightType.Point Then
            device.LightsFixed(2).Type = LightType.Directional
        End If
    End If

    ' Values for the light position, direction, and color
    Dim x As Single = System.Convert.ToSingle(Math.Sin(appTime * 2.0F))
    Dim y As Single = System.Convert.ToSingle( _
        Math.Sin(appTime * 2.246F))
    Dim z As Single = System.Convert.ToSingle( _
        Math.Sin(appTime * 2.64F))

    Dim r As Byte = System.Convert.ToByte((0.5F + 0.5F * x) * &HFF)
    Dim g As Byte = System.Convert.ToByte((0.5F + 0.5F * y) * &HFF)
    Dim b As Byte = System.Convert.ToByte((0.5F + 0.5F * z) * &HFF)
    device.LightsFixed(2).DiffuseColor = _
        ColorValueFixed.FromColor( _
        System.Drawing.Color.FromArgb(r, g, b))
    device.LightsFixed(2).Range = 100.0F

    Select Case device.LightsFixed(2).Type
        Case LightType.Point
            device.LightsFixed(2).Position = _
                New Vector3Fixed(4.5F * x, 4.5F * y, 4.5F * z)
            device.LightsFixed(2).Attenuation1 = 0.4F
        Case LightType.Directional
            device.LightsFixed(2).Direction = _
                New Vector3Fixed(x, y, z)
    End Select
    device.LightsFixed(2).Update()
End Sub

// This code example is from the
// Direct3D Mobile Fixed Point Lighting Sample
// of the .NET Compact Framework Samples in the SDK.

// The FrameMove method is called once per frame,
// and is the entry point for animating the scene.

public void FrameMove()
{
    lightData = device.LightsFixed[2];
    // Rotate through the various light types
    if (((int)appTime % 20) < 10)
        device.LightsFixed[2].Type = LightType.Point;
    else
        device.LightsFixed[2].Type = LightType.Directional;

    // Make sure the light type is supported by the device. If
    // VertexProcessingCaps.PositionAllLights is not set, the
    // device does not support point or spot lights, so change
    // light #2's type to a directional light.
    if
    (!device.DeviceCaps.VertexProcessingCaps.SupportsPositionalLights)
    {
        if (device.LightsFixed[2].Type == LightType.Point)
            device.LightsFixed[2].Type = LightType.Directional;
    }

    // Values for the light position, direction, and color
    float x = (float)Math.Sin(appTime*2.000f);
    float y = (float)Math.Sin(appTime*2.246f);
    float z = (float)Math.Sin(appTime*2.640f);

    byte r = (byte)((0.5f + 0.5f * x) * 0xff);
    byte g = (byte)((0.5f + 0.5f * y) * 0xff);
    byte b = (byte)((0.5f + 0.5f * z) * 0xff);
    device.LightsFixed[2].DiffuseColor =
        ColorValueFixed.FromColor(System.Drawing.Color.FromArgb(r,
        g, b));
    device.LightsFixed[2].Range = 100.0f;

    switch(device.LightsFixed[2].Type)
    {
        case LightType.Point:
            device.LightsFixed[2].Position =
                new Vector3Fixed(4.5f * x, 4.5f * y, 4.5f * z);
            device.LightsFixed[2].Attenuation1  = 0.4f;
            break;
        case LightType.Directional:
            device.LightsFixed[2].Direction =
                new Vector3Fixed(x, y, z);
            break;
    }
    device.LightsFixed[2].Update();
}

Inheritance Hierarchy

System.Object
   Microsoft.WindowsMobile.DirectX.Direct3D.BaseMesh
    Microsoft.WindowsMobile.DirectX.Direct3D.LightFixed

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Platforms

Windows CE, Windows Mobile for Pocket PC, Windows Mobile for Smartphone

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

Version Information

.NET Compact Framework

Supported in: 2.0

See Also

Reference

LightFixed Members
Microsoft.WindowsMobile.DirectX.Direct3D Namespace

Other Resources

Direct3D Programming