C#

public sealed class EffectParameter

Creating and assigning a EffectParameter instance for each technique in your Effect is significantly faster than using the Parameters indexed property on Effect.

To use a EffectParameter you must:

1. Create a EffectParameter for each parameter in your Effect that you will be setting in Draw or Update.

   C#

   public EffectParameter mWorld;
   public EffectParameter mCameraView;
   public EffectParameter CameraPos;
   public EffectParameter mCameraProj;

2. Assign an Effect parameter to your EffectParameter.

   C#

   mWorld = effect.Parameters["g_mWorld"];
   mCameraView = effect.Parameters["g_mCameraView"];
   CameraPos = effect.Parameters["g_CameraPos"];
   mCameraProj = effect.Parameters["g_mCameraProj"];

3. Call SetValue on your EffectParameter to change the parameter value.

   C#

   MyEffect.CameraPos.SetValue(CameraPos);
   MyEffect.mCameraView.SetValue(view);
   MyEffect.mCameraProj.SetValue(projection);
   MyEffect.LightPos.SetValue(LightPos);
   MyEffect.mLightView.SetValue(Matrix.CreateLookAt(LightPos, 
       bounds.Center, Vector3.Up));

Tasks

Reference

Xbox 360, Windows XP SP2, Windows Vista