Rendering学習日記

• RenderMan
• 2010.01.10 Sunday

googleコードだったか、PythonではしるShaderManで作成したシェーダをMacRenderManのShaderAppでコンパイルしようとしてみた。変数の宣言で難あり、書き換えたらなんとかコンパイルでき、レンダリングもできました。


シェーダはこちら。

surface garigari (float Km = 1;)

{

 point Nf1,Nf6;

 color Id6,Itr6;

 point PP1,temp_PP2;

 float temp_f2;

 

 Nf6 = faceforward( normalize(N), I );

 Id6 = 0.8 * diffuse(Nf6);



 Itr6 = 0;

 if (0 != 0) {

  illuminance(P, Nf6, PI)

  Itr6 += Cl;

  Itr6 *= 0;

 }



 temp_PP2 = (point(0.0,0.0,0.0) == point(0.0,0.0,0.0)) ? P : point(0.0,0.0

,0.0);

 temp_PP2=transform("shader", temp_PP2);

 temp_f2 = 2.0*noise(temp_PP2*10)-1.0;





 PP1 = P;



  Nf1 = normalize( ntransform("shader", N) );

  PP1 += vtransform("shader", "current",  Km * temp_f2 * vector Nf1);

  N = calculatenormal(PP1);

  P = PP1;



Ci = (color(0,0.5,1) * (Id6 + Itr6 + color(0,0,0))+temp_f2)+0;

Oi = 1;

}

こちらで実験してみた。レンダリング用のRIB。MacOS8.6、G3の300MHzで36秒でした。

#Option "searchpath" "shader" "@:c:/cutter/RmanNotes/"

Display "gari.tif" "file" "rgb"

#Display "gari" "framebuffer" "rgb"

Projection "perspective" "fov" 90 

Format 640 480 1

PixelSamples 2 2

ShadingRate 0.5

#PixelFilter "box" 1 1



Translate 0 0 3.5



WorldBegin

	LightSource "ambientlight" 1 "intensity" [0.2]

	LightSource "distantlight" 2 "from" [1 1 -2] "to" [0 0 0] "intensity" [2]

    	Color 0.2 0.4 0.6



    	#Surface "likemouse3" "float repeatC" 20 "float fuzz" 0.0 "color layer_color" [1 0 0]

	#Surface "kinta3" "float repeatC" 16 "color layer_color2" [1 0 1]

	Attribute "displacementbound" "sphere" [0.8] "coordinatesystem" ["shader"]

	Surface "garigari" "float Km" 0.8

	#Polygon "P" [-2 2 0 -2 -2 0 2 -2 0 2 2 0] "st" [0 0  0 1  1 1  1 0]

	#Rotate 90 1 0 0

	Sphere 2 -2 2 360



WorldEnd

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