string Description = "Decal Animate Shader";
#include "constantbuffers.fx"
#include "settings.fx" 
 
float4x4 WorldView : WorldView;
float4x4 WorldViewProj : WorldViewProjection;
float Time: Time;
float sintime : SinTime;
 
float SpriteRows : Power
<
    string UIName =  "Rows";
    string UIWidget = "slider";
    float UIMin = 1.0;
    float UIMax = 16.0;
    float UIStep = 1.0;
> = 4.000000;
 
float SpriteColumns : Power
<
    string UIName =  "Columns";
    string UIWidget = "slider";
    float UIMin = 1.0;
    float UIMax = 16.0;
    float UIStep = 1.0;
> = 4.000000;
 
float FramesPerSec : Power
<
    string UIName =  "Frames Per Second";
    string UIWidget = "slider";
    float UIMin = 0.0;
    float UIMax = 30.0;
    float UIStep = 0.5;
> = 25.000000;
 
float Looptime : Power
<
    string UIName =  "Loop Time";
    string UIWidget = "slider";
    float UIMin = 1.0;
    float UIMax = 200.0;
    float UIStep = 1.0;
> = 100.000000;
 
Texture2D DiffuseMap : register( t0 );
 
SamplerState SampleWrap
{
    Filter = MIN_MAG_MIP_LINEAR;
    AddressU = Wrap;
    AddressV = Wrap;
};
 
struct appdata 
{
    float3 Position : POSITION0;
    float3 Normal   : NORMAL0;
    float2 UV       : TEXCOORD0;
};
 
struct vertexOutput
{
    float4 Position    : POSITION;
    float2 atlasUV     : TEXCOORD0;
};
 
vertexOutput mainVS(appdata IN)   
{
    vertexOutput OUT;
    OUT.Position = mul(float4(IN.Position,1), WorldViewProj);
    float2 DimensionsXY = float2(SpriteRows,SpriteColumns); 
    float2 atlasUVtemp = IN.UV;                 
    float loopcounter  = floor(Time/Looptime);
    float offset = Looptime*loopcounter;
    float speed =(Time*FramesPerSec) - (offset*FramesPerSec);
    float index = floor( speed);
    float rowCount = floor( (index / DimensionsXY.y) );
    float2 offsetVector = float2(index, rowCount);
    float2 atlas = (1.0 / DimensionsXY) ;
    float2 move = (offsetVector + atlasUVtemp);
    OUT.atlasUV = (atlas.xy * move);
    return OUT;
}
 
float4 mainPS(vertexOutput IN) : COLOR
{
   float4 diffuse = DiffuseMap.SampleLevel(SampleWrap,IN.atlasUV,0);
   return diffuse;
}
 
technique11 Main
{
    pass MainPass
    {
        SetVertexShader(CompileShader(vs_5_0, mainVS()));
        SetPixelShader(CompileShader(ps_5_0, mainPS()));
        SetGeometryShader(NULL);
    }
}