Rendering学習日記

次のサイトを参考にして、組んでみました。
横浜国立大学教育人間科学部マルチメディア文化課程の西村研究室参考
http://nishimulabo.edhs.ynu.ac.jp/~povray/beginner/p4-14.html
情報B：POV-Rayが教材になるか？
http://arashi50.cocolog-nifty.com/blog/2008/04/bpovray_8e8d.html

#nishimura_pov.pyg

from math import *



Output ("nishimura_pov.tif", "tiff", "rgb", "camera", "float gain", 1, "float gamma",

 1, "string filter", "gaussian", "float[2] filterwidth", (2, 2))

Attribute ("float shadingquality",1.2)

Attribute ("string projection", "perspective")

Attribute ("float fov", 80)

Attribute ("int[2] resolution", (640, 480))

#placecam 0 6 -9 0 0 0

Rotate (-33.69, 1.00, 0.00, 0.00)

Translate (0.00, -6.00, 9.00)



Attribute ("string geometryset", "+shadows")

Attribute ("string geometryset", "+reflection")



World ()

Light ( "light0", "ambientlight", "float intensity", 0.2 )

Light ("light1", "pointlight", "float intensity", 1400, "point from", (-20, 20, -20),"string shadowname", "shadows")



PushTransform ()

Attribute ("color C", (0.2, 0.4, 0.75))

Sphere (100, -100, 100, 360)

PopTransform ()



PushTransform ()

Attribute ("color C", (1, 1, 1))

Shader ("surface", "metal", "string envname", "reflection",

        "float Kd", 0.05, "float roughness", 0.1, "float Kr", 0.75,

        "float Ka", 0.5,

#        "float samples", 4, "float blur", 0.05,

        "float twosided", 1

        )

Sphere (2, -2, 2, 360)

PopTransform ()



T = -360

while (T <= 360):

    PushTransform ()

    Attribute ("color C", (0.001*T, 1-0.001*T, 0.8))

    Shader ("surface", "plastic")

    Rotate (T,0,1,0)

    Translate (3.5,0.01*T,0)

    Scale (1,0.5,3.5)

    Input ("BoxGeom.rib")

    PopTransform ()

    T = T + 45





Translate (0, -5, 0)

Rotate (90.00, 1.00, 0.00, 0.00)

Scale (10,10,10)

ShaderGroupBegin ()

Attribute ("color C", (1, 1, 1))

Shader ("surface", "checker", "checklayer","float stilesize",0.01,"float ttilesize",0.01,"color color2", ( 0.6, 0.6, 1.0 ))

Shader ("surface", "plastic", "plasticlayer")

ConnectShaders ("checklayer", "Cout", "plasticlayer", "C")

ConnectShaders ("checklayer", "fout", "plasticlayer", "Ks")

ShaderGroupEnd ()

Input("PlaneGeom.rib")

Render()

以下、POV-Rayチュートリアルを参考にNVIDIA Gelatoでつくりました。
ありがとうございます。
これだけで大丈夫　「情報」におけるグラフィック
http://izumi-math.jp/sanae/cg/pov/pov.htm

【第１回】最初のシーンファイル
例題１　基本の３要素
立方体を作成せよ。

#box_kore1.pyg

Output ("box_kore01.tif", "tiff", "rgb", "camera", "float gain", 1, "float gamma",

 1, "string filter", "gaussian", "float[2] filterwidth", (2, 2))

Attribute ("string projection", "perspective")

Attribute ("float fov", 10)

Attribute ("int[2] resolution", (320, 240))

#placecam 0 0 -10 0 0 0

#Rotate (-19.47, 1.00, 0.00, 0.00)

#Rotate (45.00, 0.00, 1.00, 0.00)

Translate (0.00, 0.00, 10.00)

World ()

Light ("light1", "pointlight", "float intensity", 1000, "point from", (-10, 3, -20))



PushTransform ()

Attribute ("color C", (1, 0, 0))

Shader ("surface", "plastic")

Input ("BoxGeom.rib")

PopTransform ()



Render()

例題２　図形の変換(1)　回転
例題１の立方体を回転させよ。

回転した表示が微妙に違います。
rotate <-30,20,0>
X軸、Y軸の順番だと思いましたが、
クォータニオン、オイラー角など
少し厳密にやらないといけないかな。
ありがとうございます。

#box_kore2.pyg

Output ("box_kore02.tif", "tiff", "rgb", "camera", "float gain", 1, "float gamma",

 1, "string filter", "gaussian", "float[2] filterwidth", (2, 2))

Attribute ("string projection", "perspective")

Attribute ("float fov", 10)

Attribute ("int[2] resolution", (320, 240))

#placecam 0 0 -10 0 0 0

#Rotate (-19.47, 1.00, 0.00, 0.00)

#Rotate (45.00, 0.00, 1.00, 0.00)

Translate (0.00, 0.00, 10.00)

World ()

Light ("light1", "pointlight", "float intensity", 800, "point from", (-10, 3, -20))

Light ("light2", "pointlight", "float intensity", 350, "point from", (10, 10, -10))



PushTransform ()

Attribute ("color C", (1, 0, 0))

Shader ("surface", "plastic")

Rotate (20,0,1,0)

Rotate (-30,1,0,0)

Input ("BoxGeom.rib")

PopTransform ()



Render()