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defb - vs

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

Syntax

defb dest, booleanValue

 

where

  • dst is the destination register.
  • booleanValue is a boolean value, either True or False.

Remarks

Vertex shader versions1_12_02_x2_sw3_03_sw
defbxxxxx

 

The defb - vs 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 API method SetVertexShaderConstantB.

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

  1. Use defb - vs to define the constant directly inside a shader.
  2. Use the API methods to set a constant.

Related topics

def - vs
defi - vs

 

 

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