defb - vs

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

Syntax

where

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

Remarks

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.
   • Use IDirect3DDevice9::SetVertexShaderConstantB to set a Boolean constant.

See Also

def - vs, defi - vs