Rendering学習日記

• Lightflow
• 2010.08.20 Friday

abnormal program termination

Lightflowでレンダリング中、以下のようなエラーが出た。

Microsoft Visual C++ Runtime Library
Runtime Error!
Program: C:\Program Files(x86)\python\python.exe

abnormal program termination

Rendering 720 x 400 pixels
00:00:42 - 73.2%
Error (LfFault):
LfSaveTGABlock()
error writing "to2_8f.tga"

続行するには何かキーを押してください . . .

tmp_ve_a03400などテンポラリーファイルが残ってしまう。
気になるので削除した。
ViX.exe を終了してから、Lightflowを起動するとうまく走ります。
59秒かかった。
使い方としては面倒だけど、いろいろと実験できて面白い。

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• Lightflow(Lightflow python script)
• 2010.08.20 Friday

Lightflowのcylinderには、ふたがしてない。RenderManで用意されているプリミティブと同じだ。X軸中心に30度傾ける。
s.transformBegin( transform().rotationAroundX( pi*30.0/180 )
Pythonで除算する時は、小数点をつけておかないと正しく計算しないから注意する必要がある。

#! /usr/bin/env python

from lightflowPM import *

from math import * 



s = scene()



s.lightOn( s.newLight( "point", [ "position", vector3( 5.0, -5.0, 3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



s.lightOn( s.newLight( "point", [ "position", vector3( -5.0, -5.0, 3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



s.lightOn( s.newLight( "point", [ "position", vector3( 5.0, -5.0, -3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



plastic = s.newMaterial( "standard", [ "kc", vector3( 0.096, 0.252, 0.504 ), "kd", 0.5, "km", 0.1 ] )





s.materialBegin( plastic )

s.transformBegin( transform().rotationAroundX( pi*30.0/180 ) )



s.addObject( s.newObject( "cylinder", [ "radius", 1.0 ,"height",2.4] ) )



s.transformEnd()

s.materialEnd()





saver = s.newImager( "tga-saver", [ "file", "bool01.tga" ] )



s.imagerBegin( saver )



camera = s.newCamera( "pinhole", [ "eye", vector3( 0, -4, 3 ), 

						"aim", vector3( 0, 1, 0 ),

						"aa-samples", 2,5

						 ] )



s.imagerEnd()



s.render( camera, 300, 300 )

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• Lightflow(Lightflow python script)
• 2010.08.20 Friday

disc,cylinderを使って、ふたをした円柱を原点で作成する。
capをしてグループ化してみた。

hole = s.newObject( "boundary", [ "surfaces", cyl, cap1, cap2 ] )

これでひとつにまとめ、レンダリングで画面に表示するためには、

s.addObject(hole)を行う。

サンプルファイルは次のようになる。

#! /usr/bin/env python

from lightflowPM import *

from math import * 



s = scene()



s.lightOn( s.newLight( "point", [ "position", vector3( 5.0, -5.0, 3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



s.lightOn( s.newLight( "point", [ "position", vector3( -5.0, -5.0, 3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



s.lightOn( s.newLight( "point", [ "position", vector3( 5.0, -5.0, -3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



plastic = s.newMaterial( "standard", [ "kc", vector3( 0.096, 0.252, 0.504 ), "kd", 0.5, "km", 0.1 ] )



s.materialBegin( plastic )

s.transformBegin( transform().rotationAroundX( pi*15.0/180 ) )

s.transformBegin( transform().translation( vector3( 0, 0, 2.4 ) ) )

cap1=s.newObject( "disc", [ "radius", 1.0 ] )

s.transformEnd()



s.transformBegin( transform().translation( vector3( 0, 0, 0 ) ) )

cap2=s.newObject( "disc", [ "radius", 1.0 ] )

s.transformEnd()





cyl=s.newObject( "cylinder", [ "radius", 1.0 ,"height",2.4] )

s.transformEnd()



hole = s.newObject( "boundary", [ "surfaces", cyl, cap1, cap2 ] )



s.materialEnd()



s.addObject(hole)





saver = s.newImager( "tga-saver", [ "file", "bool02.tga" ] )



s.imagerBegin( saver )



camera = s.newCamera( "pinhole", [ "eye", vector3( 0, -4, 3 ), 

									"aim", vector3( 0, 1, 0 ),

									"aa-samples", 2,5

									 ] )



s.imagerEnd()



s.render( camera, 300, 300 )

X軸中心に角度を-60度傾けてみた。


X軸中心に角度を30度傾けてみた。

ありがとうございます。

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• Lightflow(Lightflow python script)
• 2010.08.20 Friday

ブーリアン演算をするために、円柱は傾けたまま、立方体は回転させてみた。元ねたは、「はじめてのCG」POV-Ray本を参考にした。

まずは円柱と立方体を表示する。


サンプルファイルはこちら

#! /usr/bin/env python

from lightflowPM import *

from math import * 



s = scene()



s.lightOn( s.newLight( "point", [ "position", vector3( 5.0, -5.0, 3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



s.lightOn( s.newLight( "point", [ "position", vector3( -3.0, -3.0, 3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



s.lightOn( s.newLight( "point", [ "position", vector3( 3.0, 3.0, 3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



plastic = s.newMaterial( "standard", [ "kc", vector3( 0.096, 0.252, 0.504 ), "kd", 0.5, "km", 0.1 ] )



#cylinder

s.materialBegin( plastic )

s.transformBegin( transform().rotationAroundX( pi*5.0/180 ) )

s.transformBegin( transform().translation( vector3( 0, 0, 2.4 ) ) )

cap1=s.newObject( "disc", [ "radius", 1.0 ] )

s.transformEnd()



s.transformBegin( transform().translation( vector3( 0, 0, 0 ) ) )

cap2=s.newObject( "disc", [ "radius", 1.0 ] )

s.transformEnd()



cyl=s.newObject( "cylinder", [ "radius", 1.0 ,"height",2.4] )

s.transformEnd()

s.materialEnd()



#cylinder with double caps

hole = s.newObject( "boundary", [ "surfaces", cyl, cap1, cap2 ] )







plastic2 = s.newMaterial( "standard", [ "kc", vector3(0.556863,0.137255,0.137255), "kd", 0.5, "km", 0.1 ] )



#box

s.materialBegin( plastic2 )

s.transformBegin( transform().translation( vector3( 0, 0, 1.2 ) ) )

s.transformBegin( transform().rotationAroundY( pi*45.0/180 ) )

s.addObject( s.newObject( "box", [ "position",vector3( -1.0, -1.0, -1.0 ),vector3( 1.0, 1.0, 1.0 )] ) )

s.transformEnd()

s.transformEnd()

s.materialEnd()



s.addObject(hole)





saver = s.newImager( "tga-saver", [ "file", "bool03.tga" ] )



s.imagerBegin( saver )



camera = s.newCamera( "pinhole", [ "eye", vector3( -1.5, -4, 3 ), 

									"aim", vector3( 0, 0, 1 ),

									"aa-samples", 2,5

									 ] )



s.imagerEnd()



s.render( camera, 400, 400 )

面白いですね。ありがとうございます。

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• Lightflow(Lightflow python script)
• 2010.08.20 Friday

立方体からふたつき円柱を使ってくり貫いた。


csg1 = s.newObject( "solid",[ "type", "difference",
"solids", box1, hole ] )
"difference"差集合を表す。
box1-holeを行っている。

サンプルファイルはこちら

#! /usr/bin/env python

from lightflowPM import *

from math import * 



s = scene()



s.lightOn( s.newLight( "point", [ "position", vector3( 5.0, -5.0, 3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



s.lightOn( s.newLight( "point", [ "position", vector3( -3.0, -3.0, 3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



s.lightOn( s.newLight( "point", [ "position", vector3( 3.0, 3.0, 3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



plastic = s.newMaterial( "standard", [ "kc", vector3( 0.096, 0.252, 0.504 ), "kd", 0.5, "km", 0.1 ] )



#cylinder

s.materialBegin( plastic )

s.transformBegin( transform().rotationAroundX( pi*5.0/180 ) )

s.transformBegin( transform().translation( vector3( 0, 0, 2.4 ) ) )

cap1=s.newObject( "disc", [ "radius", 1.0 ] )

s.transformEnd()



s.transformBegin( transform().translation( vector3( 0, 0, 0 ) ) )

cap2=s.newObject( "disc", [ "radius", 1.0 ] )

s.transformEnd()



cyl=s.newObject( "cylinder", [ "radius", 1.0 ,"height",2.4] )

s.transformEnd()

s.materialEnd()



#cylinder with double caps

hole = s.newObject( "boundary", [ "surfaces", cyl, cap1, cap2 ] )







plastic2 = s.newMaterial( "standard", [ "kc", vector3(0.556863,0.137255,0.137255), "kd", 0.5, "km", 0.1 ] )



#box1

s.materialBegin( plastic2 )

s.transformBegin( transform().translation( vector3( 0, 0, 1.2 ) ) )

s.transformBegin( transform().rotationAroundY( pi*45.0/180 ) )

box1=s.newObject( "box", [ "position",vector3( -1.0, -1.0, -1.0 ),vector3( 1.0, 1.0, 1.0 )] )

s.transformEnd()

s.transformEnd()

s.materialEnd()





csg1 = s.newObject( "solid",

		    [ "type", "difference",

		      "solids", box1, hole ] )



s.addObject(csg1)





saver = s.newImager( "tga-saver", [ "file", "bool04.tga" ] )



s.imagerBegin( saver )



camera = s.newCamera( "pinhole", [ "eye", vector3( -1.5, -4, 3 ), 

									"aim", vector3( 0, 0, 1 ),

									"aa-samples", 2,5

									 ] )



s.imagerEnd()



s.render( camera, 400, 400 )

逆にすれば形も変わる。
csg1 = s.newObject( "solid",[ "type", "difference",
"solids", hole, box1 ] )

ありがとうございます。

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• Lightflow(Lightflow python script)
• 2010.08.20 Friday

ブーリアン演算を使って、お互いの物体の重なっている部分を表示するには、"intersection"を使う。Lightflowの設定では3つの物体でもまとめて計算できるようだ。便利かも。
csg1 = s.newObject( "solid",
[ "type", "intersection",
"solids", box1, hole ] )

以下はサンプルファイル参考にしてみてください。

#! /usr/bin/env python

from lightflowPM import *

from math import * 



s = scene()



s.lightOn( s.newLight( "point", [ "position", vector3( 5.0, -5.0, 3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



s.lightOn( s.newLight( "point", [ "position", vector3( -3.0, -3.0, 3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



s.lightOn( s.newLight( "point", [ "position", vector3( 3.0, 3.0, 3.0 ), "color", vector3( 300.0, 300.0, 300.0 ) ] ) )



plastic = s.newMaterial( "standard", [ "kc", vector3( 0.096, 0.252, 0.504 ), "kd", 0.5, "km", 0.1 ] )



#cylinder

s.materialBegin( plastic )

s.transformBegin( transform().rotationAroundX( pi*5.0/180 ) )

s.transformBegin( transform().translation( vector3( 0, 0, 2.4 ) ) )

cap1=s.newObject( "disc", [ "radius", 1.0 ] )

s.transformEnd()



s.transformBegin( transform().translation( vector3( 0, 0, 0 ) ) )

cap2=s.newObject( "disc", [ "radius", 1.0 ] )

s.transformEnd()



cyl=s.newObject( "cylinder", [ "radius", 1.0 ,"height",2.4] )

s.transformEnd()

s.materialEnd()



#cylinder with double caps

hole = s.newObject( "boundary", [ "surfaces", cyl, cap1, cap2 ] )







plastic2 = s.newMaterial( "standard", [ "kc", vector3(0.556863,0.137255,0.137255), "kd", 0.5, "km", 0.1 ] )



#box1

s.materialBegin( plastic2 )

s.transformBegin( transform().translation( vector3( 0, 0, 1.2 ) ) )

s.transformBegin( transform().rotationAroundY( pi*45.0/180 ) )

box1=s.newObject( "box", [ "position",vector3( -1.0, -1.0, -1.0 ),vector3( 1.0, 1.0, 1.0 )] )

s.transformEnd()

s.transformEnd()

s.materialEnd()





csg1 = s.newObject( "solid",

		    [ "type", "intersection",

		      "solids", box1, hole ] )



s.addObject(csg1)





saver = s.newImager( "tga-saver", [ "file", "bool04in.tga" ] )



s.imagerBegin( saver )



camera = s.newCamera( "pinhole", [ "eye", vector3( -1.5, -4, 3 ), 

									"aim", vector3( 0, 0, 1 ),

									"aa-samples", 2,5

									 ] )



s.imagerEnd()



s.render( camera, 400, 400 )

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