FoliageReplicator Upgrades For TSE

Hello all. I was looking at this resource the other day from Jeff Loveless:

http://www.garagegames.com/index.php?sec=mg&mod=resource&page=view&qid=11963

which implemented clustering and multiple foliage textures for TGE. So I decided to port that resource to TSE. The clustering works in the same way though needed some code changes for the TSE version. Along the way though I decided to do the multi foliage types using a single texture. It works by using a flag to denote if your foliage is normal or a QuadTexture (the UseQuadTexture flag in Mission Editor). So you'd just make a PNG or DDS file and split it into 4 imaginary quadrants, and paste a foliage texture in each of the 4 quadrants. If you leave the quadtexture flag unchecked then it works as normal.

As another bonus I added in some simple color variations. This will allow you to take you texture and blend some different colors with it to give some variation so all your blades of grass aren't the same color for example. That works by setting three four fields: GradientTexture, UseBlend, BlendStart and BlendEnd. If you check the UseBlend flag then it will activate this effect. BlendStart and BlendEnd are a float value from 0.0 to 1.0, which reflects which parts of the gradient texture range you want to use. The GradientTexture is a texture file that you will need to create in photoshop or whatever that stores the color range vertically. It only uses the Y pixels, and is always using the first pixel X wise. So for example if you made a 64x64 texture, and the first line started with a green color, and moving down the Y axis by the time you reached the bottom line it was yellow, and you set the BlendStart to 0 and the BlendEnd to 1 then your foliage would be colored a random shade of green to yellow. If you set the blendEnd to 0.5 then it would start at green and end at a greenishyellow variant. If your using a grayscale image, this allows you to make some nice variations on your foliage colors.

I'm pasting the source code into here in it's entirety for the four files which require changes:

shaders/FxFoliageReplicatorP.hlsl

#include "shdrConsts.h"

//-----------------------------------------------------------------------------
// Structures                                                                  
//-----------------------------------------------------------------------------
struct ConnectData
{
   float2 texCoord        : TEXCOORD0;
   float4 lum		  : COLOR0;
   float4 groundAlphaCoeff : COLOR1;
   float2 alphaLookup	  : TEXCOORD1;
   float2 blendColor      : TEXCOORD2;
};

struct Fragout
{
   float4 col : COLOR0;
};

//-----------------------------------------------------------------------------
// Main                                                                        
//-----------------------------------------------------------------------------
Fragout main( ConnectData IN,
              uniform sampler2D diffuseMap      : register(S0),
              uniform sampler2D alphaMap		: register(S1),
              uniform sampler2D blendMap        : register(S2),
              uniform float4    groundAlpha     : register(C1)       
)
{
   Fragout OUT;

   float4 alpha = tex2D(alphaMap, IN.alphaLookup);
   OUT.col = IN.lum * (tex2D(diffuseMap, IN.texCoord) * tex2D(blendMap, IN.blendColor));
   OUT.col.a = OUT.col.a * min(alpha, groundAlpha + IN.groundAlphaCoeff.x);
   
   return OUT;
}