Effect.Technique Property (Microsoft.DirectX.Direct3D)

How Do I...?

• Using an Effect

Retreives and sets the active technique.

Definition

Visual Basic	Public Property Technique As EffectHandle
C#	public EffectHandle Technique { get; set; }
C++	public: property EffectHandle^ Technique {         EffectHandle^ get();         void set(EffectHandle^ value); }
JScript	public function get Technique() : EffectHandle public function set Technique(EffectHandle);

Property Value

Microsoft.DirectX.Direct3D.EffectHandle
An EffectHandle object that is a unique identifier for the active technique.

This property is read/write. 

How Do I...?

Using an Effect

This example demonstrates how to use an effect technique that was loaded from a file.

Add effects code to your rendering method, such as OnRender(), in-between calls to Device.BeginScene and Device.EndScene.

1. Create or obtain access to a high-level shader language (HLSL) file (.fx).
2. Load the HLSL file using Effect.FromFile.
3. Set Effect.Technique with the effect's technique.
4. Use Effect.Begin to obtain the number of passes for the effect.
5. Create a loop to iterate through all of the effect's passes. Rendering an effect occurs within a loop between calls to Effect.BeginPass and Effect.EndPass. The loop itself is nested between calls to Effect.Begin and Effect.End.
6. Render each pass within the loop with calls to Effect.BeginPass, Device.DrawPrimitives, and Effect.EndPass.

In the following C# code example, device is assumed to be the rendering Device.

              [C#]
              

public void OnRender ()
{
    .
    .
    .

    // Load the effect from file.
    Effect effect = Effect.FromFile(device, "shadercode.fx", null,
                                    ShaderFlags.None, null);
    // Set the technique.
    effect.Technique = "ShaderTechnique";

    // Note: Effect.Begin returns the number of
    // passes required to render the effect.
    int passes = effect.Begin(0);
    
    // Loop through all of the effect's passes.
    for (int i = 0; i < passes; i++)
    {
        // Set a shader constant
        effect.SetValue("WorldMatrix", worldMatrix);

        // Set state for the current effect pass.
        effect.BeginPass(i);
        
        // Render some primitives.
        device.DrawPrimitives(PrimitiveType.TriangleList, 0, 1);
        
        // End the effect pass
        effect.EndPass();
    }

    // Must call Effect.End to signal the end of the technique.
    effect.End();

    .
    .
    .
}