#include "C:\XNA\Projects\2D\Game Engines\Softwork Engine\EngineGame\Content\Quad.fxh"

float Script : STANDARDSGLOBAL <
  string UIWidget = "none";
  string ScriptClass = "scene";
  string ScriptOrder = "postprocess";
  string ScriptOutput = "color";
  string Script = "Technique=Technique?spot:bumpy;";
> = 0.8; // version #

float4 ClearColor : DIFFUSE <string UIName="Background";> = {0.5,0.5,0.5,1.0};
float ClearDepth < string UIWidget = "none"; > = 1.0;

//////////////////////////////////

float3 SpotColor <
  string UIName = "Spotlight";
  string UIWidget = "Color";
> = {1.0f, 0.95f, 0.85f};

float3 Ambient <
  string UIName = "Ambient";
  string UIWidget = "Color";
> = {0.05f, 0.05f, 0.1f};

//////////

float Angle <
  string UIWidget = "slider";
  string UIName = "Spin";
  float UIMin = 0.0;
  float UIMax = 360.0;
  float UIStep = 0.01;
> = 220.0f;

float Azimuth <
  string UIWidget = "slider";
  string UIName = "Azimuth";
  float UIMin = 0.0;
  float UIMax = 90.0;
  float UIStep = 0.01;
> = 20.0f;

float CenterX <
  string UIWidget = "slider";
  string UIName = "Center X";
  float UIMin = 0.0;
  float UIMax = 1.0;
  float UIStep = 0.01;
> = 0.5f;

float CenterY <
  string UIWidget = "slider";
  string UIName = "Center Y";
  float UIMin = 0.0;
  float UIMax = 1.0;
  float UIStep = 0.01;
> = 0.5f;

float Distance <
  string UIWidget = "slider";
  string UIName = "Distance";
  float UIMin = 0.1;
  float UIMax = 5.0;
  float UIStep = 0.01;
> = 0.8f;

float ConeAngle <
  string UIWidget = "slider";
  string UIName = "Cone Angle";
  float UIMin = 0.1;
  float UIMax = 90.0;
  float UIStep = 0.01;
> = 28.0f;

float Intensity <
  string UIWidget = "slider";
  string UIName = "Spot Intensity";
  float UIMin = 0.1;
  float UIMax = 10.0;
  float UIStep = 0.01;
> = 0.6f;

float Bump <
  string UIWidget = "slider";
  string UIName = "Bumpiness";
  float UIMin = 0.1;
  float UIMax = 10.0;
  float UIStep = 0.01;
> = 3.0f;

/// VM Globals /////////////////

static float CosCone = cos(radians(ConeAngle));

float3 spot_vector() {
  float zr = radians(Angle);
  float yr = radians(Azimuth);
  float3 dir = -sin(yr);
  float a = cos(yr);
  dir.x = a * cos(zr);
  dir.y = a * sin(zr);
  return normalize(dir);
}

static float3 SpotDir = -spot_vector();

float3 spot_location() {
  float3 ctr = float3(CenterX,CenterY,0);
  return ctr - Distance*SpotDir;
}

static float3 SpotPos = spot_location();
///////////////////////////// Normal Map //////////////////

texture normalTexture : NORMAL <
    string ResourceName = "default_bump_normal.dds";
    string ResourceType = "2D";
>;

sampler2D normalSampler = sampler_state {
  Texture = <normalTexture>;
  MinFilter = Linear;
  MagFilter = Linear;
  MipFilter = Linear;
  AddressU = Wrap;
  AddressV = Wrap;
};
///////////////////////////// Render-to-Texture Data //////
/*** Shaders ****************************/

float4 spotPS(QuadVertexOutput IN) : COLOR
{
    float3 delta = SpotPos - float3(IN.UV.xy,0);
    float fall = Intensity / dot(delta,delta);
  float3 dn = normalize(delta);
  float cone = -dot(dn,SpotDir);
    cone = max((float)0,((cone-CosCone)/(((float)1.0)-CosCone)));
  float4 lit = float4((fall * cone * SpotColor) + Ambient,1);
  return (lit);
}

float4 bumpspotPS(QuadVertexOutput IN) : COLOR
{
    float3 delta = SpotPos - float3(IN.UV.xy,0);
    float fall = Intensity / dot(delta,delta);
  float3 dn = normalize(delta);
  float cone = -dot(dn,SpotDir);
    cone = max((float)0,((cone-CosCone)/(((float)1.0)-CosCone)));
    float2 b = tex2D(normalSampler,IN.UV).xy-float2(0.5,0.5);
    float3 N = float3((Bump*b),1);
    N = normalize(N);
    float diff = dot(N,SpotDir);
  float4 lit = float4((diff*fall * cone * SpotColor) + Ambient,1);
  return (lit);
}
/*** Technique **************************/

technique spot <
  string Script =
      "RenderColorTarget0=;"
          "RenderDepthStencilTarget=;"
          "ClearSetColor=ClearColor;"
          "ClearSetDepth=ClearDepth;"
         "Clear=Color;"
      "Clear=Depth;"
      "ScriptExternal=color;"
          "Pass=p0;";
> {
    pass p0 <
      string Script = "RenderColorTarget0=;"
                "Draw=Buffer;";
    > {
    VertexShader = compile vs_1_1 ScreenQuadVS();
    ZEnable = false;
    ZWriteEnable = false;
    CullMode = None;
    AlphaBlendEnable = true;
    SrcBlend = DestColor;
    DestBlend = zero;
    PixelShader  = compile ps_2_a spotPS();
  }
}

technique bumpy <
  string Script =
      "RenderColorTarget0=;"
          "RenderDepthStencilTarget=;"
          "ClearSetColor=ClearColor;"
          "ClearSetDepth=ClearDepth;"
         "Clear=Color;"
      "Clear=Depth;"
      "ScriptExternal=color;"
          "Pass=p0;";
> {
    pass p0 <
      string Script = "RenderColorTarget0=;"
                "Draw=Buffer;";
    > {
    VertexShader = compile vs_1_1 ScreenQuadVS();
    ZEnable = false;
    ZWriteEnable = false;
    CullMode = None;
    AlphaBlendEnable = true;
    SrcBlend = DestColor;
    DestBlend = zero;
    PixelShader  = compile ps_2_a bumpspotPS();
  }
}