Shader "Debugger"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {}
}
SubShader
{
Cull Off
Pass
{
CGPROGRAM
#pragma vertex VSMain
#pragma geometry GSMain
#pragma fragment PSMain
#pragma target 5.0
sampler2D _MainTex;
struct Data
{
float4 vertex : SV_Position;
float2 uv : TEXCOORD0;
float number : VALUE;
};
// "PrintValue" function by P.Malin
float PrintValue( float2 vCoords, float fValue, float fMaxDigits, float fDecimalPlaces )
{
if ((vCoords.y < 0.0) || (vCoords.y >= 1.0)) return 0.0;
bool bNeg = ( fValue < 0.0 );
fValue = abs(fValue);
float fBiggestIndex = max(floor(log2(abs(fValue)) / log2(10.0)), 0.0);
float fDigitIndex = fMaxDigits - floor(vCoords.x);
float fCharBin = 0.0;
if(fDigitIndex > (-fDecimalPlaces - 1.01))
{
if(fDigitIndex > fBiggestIndex)
{
if((bNeg) && (fDigitIndex < (fBiggestIndex+1.5))) fCharBin = 1792.0;
}
else
{
if(fDigitIndex == -1.0)
{
if(fDecimalPlaces > 0.0) fCharBin = 2.0;
}
else
{
float fReducedRangeValue = fValue;
if(fDigitIndex < 0.0) { fReducedRangeValue = frac( fValue ); fDigitIndex += 1.0; }
float fDigitValue = (abs(fReducedRangeValue / (pow(10.0, fDigitIndex))));
int x = int(floor(fDigitValue - 10.0 * floor(fDigitValue/10.0)));
fCharBin = x==0?480599.0:x==1?139810.0:x==2?476951.0:x==3?476999.0:x==4?350020.0:x==5?464711.0:x==6?464727.0:x==7?476228.0:x==8?481111.0:x==9?481095.0:0.0;
}
}
}
float result = (fCharBin / pow(2.0, floor(frac(vCoords.x) * 4.0) + (floor(vCoords.y * 5.0) * 4.0)));
return floor(result - 2.0 * floor(result/2.0));
}
Data VSMain( float4 vertex:POSITION, float2 uv:TEXCOORD0 )
{
Data VS;
VS.uv = uv;
VS.vertex = vertex;
VS.number = 12.34; //vertex shader variable value to print
return VS;
}
[maxvertexcount(9)]
void GSMain( triangle Data patch[3], inout TriangleStream<Data> stream, uint id:SV_PRIMITIVEID )
{
Data GS;
for (uint i = 0; i < 3; i++)
{
GS.vertex = UnityObjectToClipPos(patch[i].vertex);
GS.uv = patch[i].uv;
GS.number = patch[i].number;
stream.Append(GS);
}
stream.RestartStrip();
if (id == 0) // determine quad
{
for (uint i = 0; i < 6; i++)
{
float u = float(i) - 2.0 * floor(float(i)/2.0);
float v = sign(fmod(126.0,fmod(float(i),6.0)+6.0));
GS.uv = float2(u, 1.0 - v) + 10000.0; // UV offset
GS.vertex = float4(sign(u)+0.5, sign(v)+0.5, 0.3, 1.0);
GS.number = patch[0].number;
stream.Append(GS);
}
}
stream.RestartStrip();
}
float4 PSMain(Data PS) : SV_Target
{
float value = PS.number;
if (PS.uv.x > 9000.0) // determine quad
{
float2 font = float2(24.0, 30.0);
float2 position = float2(_ScreenParams.x - 250.0, 15.0);
float3 base = PrintValue( (PS.vertex.xy - position) / font, value, 6.0, 2.0).xxx;
return float4(base, 1.0);
}
else return tex2D(_MainTex, PS.uv);
}
ENDCG
}
}
}
