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Microsoft DirectX 9.0

defb (Vertex Shader)


Defines a Boolean constant value, which should be loaded anytime a shader is set to a device.

Syntax

defb dest, booleanValue

where

Remarks

Vertex shader versions1_12_02_x2_sw3_03_sw
defbxxxxx

The defb (Vertex Shader) instruction defines a boolean shader constant whose value is loaded anytime a shader is set to a device. These are called immediate constants. Immediate constants take precedence over constants set by the application programming interface (API) method SetVertexShaderConstantB.

There are two ways to set a boolean constant in a shader.

  1. Use defb (Vertex Shader) to define the constant directly inside a shader.
  2. Use the API methods to set a constant.

Instruction Information

Minimum operating systemWindows 98

Related Topics



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