Vertex Shader Source Register Modifiers

Source modifiers can be applied to modify the data read from a source register before the data is used by the instruction.

Negate

Negate the contents of the source register.

The negate modifier cannot be used on second source register of these instructions: m3x2 - vs, m3x3 - vs, m3x4 - vs, m4x3 - vs, m4x4 - vs.

Absolute Value

Take the absolute value of the register.

If any version 3 shader reads from one or more constant float registers (c#), one of the following must be true.

• All of the constant floating-point registers must use the abs modifier.
• None of the constant floating-point registers can use the abs modifier.