def - vs
Microsoft DirectX 9.0 SDK Update (October 2004)

def - vs


Defines vertex shader constants.

Syntax

def dst, float1, float2, float3, float4

where

Remarks

Vertex shader versions1_12_02_x2_sw3_03_sw
defxxxxxx

The def instruction defines a 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 application programming interface (API) methods SetVertexShaderConstantF.

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

  1. Use def - vs to define the constant directly inside a shader.

    def - vs can only define floating-point constants.

  2. Use the API methods to set a constant.

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