My first commit with SVN, let's all hope I don't make some epic stupid mistake…

Add two shaders (if I did this right):
1. nightvision2scanlines - The nightvision2 shader with COD4-style scanlines added as requested in Issue 1. Should we keep the original nightvision2 as well?
2. sepia - An attempt at an old-timey sepia tone like in late 1800's video.

nightvision2scanlines.txt

@@ -0,0 +1,56 @@
+uniform samplerRECT samp0 : register(s0);
+
+void main(out float4 ocol0 : COLOR0, in float2 uv0 : TEXCOORD0)
+{
+  //variables
+  int internalresolution = 1278;
+  float4 c0 = texRECT(samp0, uv0).rgba;
+  //blur
+  float4 blurtotal = float4(0, 0, 0, 0);
+  float blursize = 1.5;
+  blurtotal += texRECT(samp0, uv0 + float2(-blursize, -blursize));
+  blurtotal += texRECT(samp0, uv0 + float2(-blursize,  blursize));
+  blurtotal += texRECT(samp0, uv0 + float2( blursize, -blursize));
+  blurtotal += texRECT(samp0, uv0 + float2( blursize,  blursize));
+  blurtotal += texRECT(samp0, uv0 + float2(-blursize,  0));
+  blurtotal += texRECT(samp0, uv0 + float2( blursize,  0));
+  blurtotal += texRECT(samp0, uv0 + float2( 0, -blursize));
+  blurtotal += texRECT(samp0, uv0 + float2( 0,  blursize));
+  blurtotal *= 0.125;
+  c0 = blurtotal;
+  //greyscale
+  float grey = ((0.3 * c0.r) + (0.4 * c0.g) + (0.3 * c0.b));
+  // brighten and apply horizontal scanlines
+  // This would have been much simpler if I could get the stupid modulo (%) to work
+  // If anyone who is more well versed in Cg knows how to do this it'd be slightly more efficient
+  // float lineIntensity = ((uv0[1] % 9) - 4) / 40;
+  float vPos = uv0[1] / 9;
+  float lineIntensity = (((vPos - (int)vPos) * 9) - 4) / 40;
+  grey = grey * 0.5 + 0.7 + lineIntensity;
+  // darken edges
+  float x = uv0[0];
+  float y = uv0[1];
+  if (x > internalresolution/2) x = internalresolution-x;
+  if (y > internalresolution/2) y = internalresolution-y;
+  if (x > internalresolution/2*0.95) x = internalresolution/2*0.95;
+  if (y > internalresolution/2*0.95) y = internalresolution/2*0.95;
+  x = -x+641;
+  y = -y+641;
+  /*****inline square root routines*****/
+  // bit of a performance bottleneck.
+  // neccessary to make the darkened area rounded
+  // instead of rhombus-shaped.
+  float sqrt=x/10;
+  while((sqrt*sqrt) < x) sqrt+=0.1;
+  x = sqrt;
+  sqrt=y/10;
+  while((sqrt*sqrt) < y) sqrt+=0.1;
+  y = sqrt;
+  /*****end of inline square root routines*****/
+  x *= 2;
+  y *= 2;
+  grey -= x/200;
+  grey -= y/200;
+  // output
+  ocol0 = float4(0, grey, 0, 1.0);
+}

sepia.txt

@@ -0,0 +1,12 @@
+uniform samplerRECT samp0 : register(s0);
+
+void main(out float4 ocol0 : COLOR0, in float2 uv0 : TEXCOORD0)
+{
+  float4 c0 = texRECT(samp0, uv0).rgba;
+  // Same coefficients as grayscale2 at this point
+  float avg = (0.222 * c0.r) + (0.707 * c0.g) + (0.071 * c0.b);
+  float red=avg;
+  float green=avg*.75;
+  float blue=avg*.5;
+  ocol0 = float4(red, green, blue, c0.a);
+}