public ProceduralTexture(int w, int h, string exp)
: base(w, h)
{
this.expression = exp;
if (texFunc == null)
{
var evaluator = new GenericExpressionEvaluator<RgbSpectrum>((i) =>
{
if (i is float)
{
return new RgbSpectrum((float)i);
}
if (i is double)
{
return new RgbSpectrum((float)((double)i));
}
return (RgbSpectrum)i;
},
RgbSpectrum.FromStringData);
texFunc = evaluator.Compile(expression);
}
}
private static void TestExpressions()
{
/* Wood
double s = pow ( SineWave ( RingSpacing*sqrt ( x*x+y*y ) + TurbScale * Turbulence ( p, 3 ) ), Squeeze );
t.Color = ( 1 - s ) * LightWood + s * DarkWood;
string wood = "unit-$pow<$saw<3*sqrt<x*x+y*y*>+1.8*$t<c,3>>,5>";
*/
string wood = "(unit-($saw<3*$sqrt<x*x+y*y*>>+$t<c,3>))*lw + ( ($saw<3*$sqrt<x*x+y*y*>>+$t<c,3>)*dw)";
string expression = wood;
//@"unit*$sqrt<x*x+y*y>";
float x = 0.5f;
float y = 0.7f;
var p = new Vector(x, y, 2 - x - y);
var p0 = new Vector(x, y, 0);
var u = new RgbSpectrum(1f);
var rnd = new FastRandom();
var c = new RgbSpectrum(NoiseProvider.Instance.Noise3D(p));
var evaluator = new GenericExpressionEvaluator<RgbSpectrum>((i) =>
{
if (i is float)
{
return new RgbSpectrum((float)i);
}
if (i is double)
{
return new RgbSpectrum((float)((double)i));
}
if (i is int)
{
return new RgbSpectrum((int)i);
}
if (i is Int64)
{
return new RgbSpectrum((int)i);
}
return (RgbSpectrum)i;
}, RgbSpectrum.FromStringData);
var func = evaluator.Compile(expression);
var f = rnd.NextDouble();
Console.WriteLine("Script version: {0}", func(new
{
e = f,
c,
u,
unit = RgbSpectrum.UnitSpectrum(),
lw = new RgbSpectrum(0.5f, 0.2f, 0.3f),
dw = new RgbSpectrum(0.3f, 0.1f, 0.1f),
x,
y,
arr = new[] { 0.5, 0.6, 0.6 },
n = c * 0.5f,
}));
Console.WriteLine("C# version : {0}", c * Math.Sqrt(x * x + y * y));
return;
}
