#include "VertexShader.h"
// Theirs:
// v0 = pos
// c0 = viewproj
// c4 = m_matWorld
// c15 = (1,-1,-1,0.5)
// c16 = m_vTexCoordScale
// c17 = v4EyePos
// c18 = g_vFog
// c94 = vLightReflectDir
// c95 = vLightDir

// Ours:
// v0 = pos
// c6 = worldviewproj
// c10 = world
// c15 = (1,-1,-1,0.5)
// c16 = m_vTexCoordScale
// c17 = v4EyePos
// c18 = g_vFog
// c19 = vLightReflectDir
// c20 = vLightDir
// c21 = vSpecularColor

//Mesh:
m4x4 r7, vPos, c10
m4x4 r0, vPos, c6

mov  OPOS,r0 
FIXUP_OPOS

//Water:
mul r8.xy,r7.xz,c16.x
add oT0.xy,r8,c16.y

mad r1,r0.wwww,c15.xzxx,r0

//For Nvidia cards:
mul r2,r1,c15.xyxx
rcp r2.w,r2.w
mul oT1,r2,r2.w
sge oT1.w,r2,r2

//Allow separate scale on refraction tex                
mul r9.xy, r7.xz, c16.z
add oT2.xy, r8, c16.w

//Fresnel factor
sub r3,c17,r7

dp3 r3.w,r3,r3
rsq r3.w,r3.w
mul r3.xyz,r3,r3.w

mul r3,r3,c17.w
add oT3.xy,r3.xz,c17.w

mov oD0,c19

mad oFog,r0.w,c18.x,c18.y