Edit

dp4 - vs

  • Article

Computes the four-component dot product of the source registers.

Syntax

dp4 dst, src0, src1

 

where

  • dst is the destination register.
  • src0 is a source register.
  • src1 is a source register.

Remarks

Vertex shader versions 1_1 2_0 2_x 2_sw 3_0 3_sw
dp4 x x x x x x

 

The following code fragment shows the operations performed:

dest.w = (src0.x * src1.x) + (src0.y * src1.y) + 
         (src0.z * src1.z) + (src0.w * src1.w);
dest.x = dest.y = dest.z = dest.w;

Vertex Shader Instructions