geoClip.sha

//Cg


float unpackFloat(float3 h){
return h.x+h.y/256+h.z/(256*256);
}

float2 geoGlipUV(float2 vertxy, float2 tileOffset, float heightMapRez){
    float2 ftileGridPos=vertxy+tileOffset;
    return (ftileGridPos+.5)/heightMapRez;
}

float hight(sampler2D k_height,float2 l_uv){
    return unpackFloat(tex2D(k_height,l_uv).xyz);
}

void vshader(
    uniform float4x4 mat_modelproj,
    in float4 vtx_position : POSITION,
    //uniform float4 k_offset,
    uniform float4 k_tileOffset,
    uniform float4 k_tilePos, //tile.x,tile.y,tile.scale
    //uniform float4 k_n,
    uniform float4 k_heightMapRez,
    out float2 l_uv: TEXCOORD0,
    in uniform sampler2D k_height: TEXUNIT0,
    in uniform sampler2D k_grassData2: TEXUNIT3,
    out float l_height : TEXCOORD1,
    out float4 l_position : POSITION,
    out float2 l_worldPos: TEXCOORD2,
    out float l_bright: TEXCOORD3,
    uniform in float4 k_heightScale
    )
{
    l_uv=geoGlipUV(vtx_position.xy.xy,k_tileOffset.xy,k_heightMapRez.x);
    l_height=hight(k_height,l_uv);
    l_position = mul(mat_modelproj, float4(vtx_position.xy,l_height*k_heightScale.x,1));
    l_worldPos=l_uv*k_tilePos.z+k_tilePos.xy;
    l_bright=1.0-tex2D(k_grassData2,l_uv).w*1;
}


void fshader( 
  in float2 l_uv: TEXCOORD0,
  //uniform float4 k_n,
  in float l_height : TEXCOORD1,
  in uniform sampler2D k_tex2D_grass: TEXUNIT4, 
  in float2 l_worldPos: TEXCOORD2,
  in float l_bright: TEXCOORD3,
  out float4 o_color: COLOR) 
{
    //float2 uv=(l_pos//abs(round((l_pos))-(l_pos));///k_n.x;
    //o_color=float4(l_uv,0,0);
    //o_color=float4(sin(l_height*500)/(l_height*100+.05),l_height,0,0);
    //o_color=float4(tex2D(tex_height,l_uv).xyz,0);//float4(uv,0,0);
    if (l_height<=0){
        o_color=float4(.1,.1,.7,0);
        }else{
        o_color=tex2D(k_tex2D_grass,l_worldPos*0.05)*l_bright;//1*(tex2D(k_tex2D_grass,l_worldPos)*.5+.5)*
        o_color.w=0;
        }
}