texelstobluewithbias.nvp

来自「游戏编程精华02－含有几十个游戏编程例子」· NVP 代码 · 共 40 行

/*********************************************************************NVMH2****
Path:  C:\Dev\devrel\Nv_sdk_4\Dx8\NVEffectsBrowser\Effects\CA_GameOfLife
File:  TexelsToBlueWithBias.nvp

Copyright (C) 1999, 2000 NVIDIA Corporation
This file is provided without support, instruction, or implied warranty of any
kind.  NVIDIA makes no guarantee of its fitness for a particular purpose and is
not liable under any circumstances for any damages or loss whatsoever arising
from the use or inability to use this file or items derived from it.

Comments:

Renders tex0 * ( RGB = 0,0,1 ) + (0x00, 0x06, 0x06) to destination

The 0x06 are to offset the green & blue components by a small amount 
   for a later dependent green-blue texture fetch

******************************************************************************/


#include "PixelConstants.h"


// Declare pixel shader version
ps.1.1

//  Multiplicative factor to isolate blue
//   RGBA
def  c0, 0.0, 0.0, 1.0, 0.0

// Additive factor to bias the green-blue slightly
def  c1, 0.0, 0.0234, 0.0234, 0.0


// get color from tex0
tex t0

mad r0, t0, c0, c1		// select blue only & add bias