Rendering学習日記

• python cgkit
• 2010.11.26 Friday

Essential RenderManを参考に、cgkitを利用して、Pointsのwidthを調整してみる。レンダリングは3Delightです。ありがとうございます。

RenderMan Procedual Primitives

#width.py - Create Particles of different sizes

import random, math

import cgkit.cri

from cgkit.cgtypes import *



# Load the RenderMan API.

# Replace the library name with whatever renderer you want to use.

ri = cgkit.cri.loadRI("3delight")

cgkit.cri.importRINames(ri, globals())



COUNT = 2000



def jitter(scale):

    val=random.random()*1000

    return (val/500-1)*scale



position=[]

constantwidth=0.5

fov=30

red=[1,0,0]

green=[0,1,0]

width=[]

constantwidth=1.0

fov=30





#/*Generate Particle Postions*/

for i in range(COUNT):

    x=math.sin(i*0.5)*50+jitter(2)

    y=math.cos(i*0.1)*50+jitter(2)

    z=math.cos(i*0.5)*100+jitter(2)

    w=jitter(1.0)+0.5

    position.append(vec3(x, y, z))

    width.append(w)



RiBegin(RI_NULL)

RiDisplay ("width.tiff","file","rgb",RI_NULL)

RiFormat(512, 384, -1.0)

RiPixelSamples( 4, 4)

RiShadingRate(0.5)

RiProjection ("perspective","fov",fov,RI_NULL)

RiWorldBegin()

RiLightSource("ambientlight","intensity",0.4)

RiLightSource("distantlight", "from",[0,0,1])

RiTranslate(0,0,250)

RiSurface("plastic")

RiColor(red)

RiPoints("P",position,"constantwidth", constantwidth,RI_NULL)

RiColor(green)

RiPoints("P",position,"width",width,RI_NULL)

RiWorldEnd()

RiEnd()

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• RenderMan
• 2010.11.27 Saturday

じっくり読んで、勉強します。
繰り返し繰り返しですね。
ありがとうございます。

In depth renderman

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• RenderMan
• 2010.11.27 Saturday

イギリスのbournemouth universityを参考にしました。ありがとうございます。Thank you.
import prman使ってます。

#ricurve_pr.py

#set PYTHONPATH=C:\Python25;C:\Python\Scripts;%RMANTREE%\bin

import prman

ri=prman.Ri()



filename="ricurve_pr.rib"



ri.Begin(ri.RENDER)

ri.Imager("background", {"color color":(.2,.4,.6)})

ri.Display ("ricurve_pr.png","file","rgb")

ri.Format(512, 384, -1.0)

ri.PixelSamples( 4, 4)

ri.ShadingRate(1)

ri.Projection(ri.PERSPECTIVE, {ri.FOV: 90})

ri.WorldBegin()

ri.LightSource("distantlight", {ri.HANDLEID: "1","to":[0,0,1]})

ri.LightSource("ambientlight", {ri.HANDLEID: "2", "intensity":[0.4]})

ri.Translate(0,0,1.8)

ri.Surface("plastic")



ri.Color([1,0,0])

points= [0, 0, 0 ,-1, -.5 ,1 ,2 ,.5 ,1 ,1 ,0, -1 ]

width=[0.01,0.04]

ri.Curves( "cubic",[4],"nonperiodic",{ri.P:points, ri.WIDTH : width})



ri.Color([0,0,1])

points2=[0,0,0,3,4,5,-1,-.5,1,2,.5,1,1,0,-1]

ri.Curves("linear",[5],"nonperiodic",{ ri.P:points2 , ri.CONSTANTWIDTH:[0.075]})



ri.WorldEnd()

ri.End()

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• python cgkit
• 2010.11.27 Saturday

3Delightとcgkitを使って、RiCurvesの表示の仕方を試してみる。スクリプトの#コメントアウトしている方法でも、表示はOK。cgkit便利ですね。
ありがとうございます。

#curves_test.py

import cgkit.cri

from cgkit.cgtypes import *



# Load the RenderMan API.

# Replace the library name with whatever renderer you want to use.

ri = cgkit.cri.loadRI("3delight")

cgkit.cri.importRINames(ri, globals())



red=(1,0,0)

curveWidth=0.3

fov=30



RiBegin(RI_NULL)

RiDisplay ("curves_test.tiff","framebuffer","rgb",RI_NULL)

RiProjection ("perspective","fov",fov,RI_NULL)

RiFormat(512, 384, -1.0)

RiWorldBegin()

RiTranslate(0,0,2)

RiColor(red)

RiRotate(45,1,0,0)

points=[-0.5,-0.5,0, 0.5,0.5,0]

curveWidth=0.1

RiCurves("linear",[2],"nonperiodic","P",points,"constantwidth",curveWidth,"Cs",[(1,0,0), (0,0,1)],RI_NULL)

#RiCurves(RI_LINEAR, [2], RI_NONPERIODIC, P=[-0.5,-0.5,0, 0.5,0.5,0], constantwidth=0.1, Cs=[(1,0,0), (0,0,1)])

RiWorldEnd()

RiEnd()

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• python cgkit
• 2010.11.27 Saturday

Essential RenderManのサンプルを参照して、Python cgkitで試してみました。RiCurvesの表記の仕方がわからなくて、最初エラーが出てしまいました。
RiCurves("linear",COUNT,"nonperiodic","P",points,"constantwidth",curveWidth
RI_NULL)
・・・
TypeError: 'int' object is not iterable

原因はCOUNTはいらないということでしょうか。スクリプト書き直したら、できました。ありがとうございます。

#/* curves2.py - create a set of curves */

import random, math

import cgkit.cri

from cgkit.cgtypes import *



# Load the RenderMan API.

# Replace the library name with whatever renderer you want to use.

ri = cgkit.cri.loadRI("3delight")

cgkit.cri.importRINames(ri, globals())



COUNT = 1000



def jitter(scale):

    val=random.random()*1000

    return (val/500-1)*scale



points=[]

pappend=points.append

nverts=[]

red=(1,0,0)

curveWidth=0.3

fov=30



#/*Generate Curve Postions*/

for i in range(COUNT):

    tx=(math.sin(i*0.3)*i*50)/COUNT+jitter(5)

    ty=(math.cos(i*0.3)*i*50)/COUNT+jitter(5)

    

    pappend(0)

    pappend(0)

    pappend(50)

    

    pappend(0.1*tx)

    pappend(0.1*ty)

    pappend(25)

    

    pappend(0.4*tx)

    pappend(0.4*ty)

    pappend(0)

    

    pappend(tx)

    pappend(ty)

    pappend(-25)

    

    nverts.append(4)

    



RiBegin(RI_NULL)

RiDisplay ("curves2.tiff","framebuffer","rgb",RI_NULL)

RiProjection ("perspective","fov",fov,RI_NULL)

RiWorldBegin()

RiTranslate(0,0,200)

RiColor(red)

RiRotate(45,1,0,0)



RiCurves("linear",nverts,"nonperiodic","P",points,"constantwidth",curveWidth,RI_NULL)



RiWorldEnd()

RiEnd()

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• python cgkit
• 2010.11.27 Saturday

cubicに書き換えてみました。
RiCurves("cubic",nverts,"nonperiodic","P",points,"constantwidth",curveWidth,RI_NULL)
勉強ですね。ありがとうございます。

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• RenderMan
• 2010.11.27 Saturday

イギリスのbournemouth universityを参考にしました。ありがとうございます。Thank you.
RenderManProServer-14からついているimport prmanを利用してます。
cubeを作成しました。

#cube_pr.py

#set PYTHONPATH=C:\Python25;C:\Python\Scripts;%RMANTREE%\bin

import getpass

import time

# import the python renderman library

import prman



def Cube(width,height,depth) :	

    w=width/2.0

    h=height/2.0

    d=depth/2.0

    ri.ArchiveRecord(ri.COMMENT, 'Cube Generated by Cube Function')

    #rear

    face=[-w,-h,d,-w,h,d,w,-h,d,w,h,d]

    ri.Patch("bilinear",{'P':face})

    #front

    face=[-w,-h,-d,-w,h,-d,w,-h,-d,w,h,-d]

    ri.Patch("bilinear",{'P':face})

    #left

    face=[-w,-h,-d,-w,h,-d,-w,-h,d,-w,h,d]

    ri.Patch("bilinear",{'P':face})

    #right

    face=[w,-h,-d,w,h,-d,w,-h,d,w,h,d]

    ri.Patch("bilinear",{'P':face})

    #bottom

    face=[w,-h,d,w,-h,-d,-w,-h,d,-w,-h,-d]

    ri.Patch("bilinear",{'P':face})

    #top

    face=[w,h,d,w,h,-d,-w,h,d,-w,h,-d]

    ri.Patch("bilinear",{'P':face})

    ri.ArchiveRecord(ri.COMMENT, '--End of Cube Function--')





ri = prman.Ri() # create an instance of the RenderMan interface

ri.Option("rib", {"string asciistyle": "indented"})



filename = "Cube.rib"

# this is the begining of the rib archive generation we can only

# make RI calls after this function else we get a core dump

ri.Begin("__render") #filename)

# ArchiveRecord is used to add elements to the rib stream in this case comments

# note the function is overloaded so we can concatinate output

ri.ArchiveRecord(ri.COMMENT, 'File ' +filename)

ri.ArchiveRecord(ri.COMMENT, "Created by " + getpass.getuser())

ri.ArchiveRecord(ri.COMMENT, "Creation Date: " +time.ctime(time.time()))



# now we add the display element using the usual elements

# FILENAME DISPLAY Type Output format

ri.Display("cube_pr.png", "file", "rgb")

ri.Format(512, 384, -1.0)

ri.PixelSamples( 4, 4)

ri.ShadingRate(1)

# now set the projection to perspective

ri.Projection(ri.PERSPECTIVE,{ri.FOV:50}) 



# now we start our world

ri.WorldBegin()

ri.LightSource("distantlight", {ri.HANDLEID: "1","to":[0,0,1]})

ri.LightSource("ambientlight", {ri.HANDLEID: "2", "intensity":[0.4]})



ri.Surface("plastic")

ri.Translate(0,0,5)



ri.TransformBegin() 

ri.Translate(-2,0,0)

ri.Rotate(25,0,1,0)

ri.Color([0,0,1])

Cube(1,1,1)

ri.TransformEnd()



ri.TransformBegin() 

ri.Translate( 0,0,0)

ri.Rotate( 25,1,1,0)

ri.Color([1,0,0])

Cube(1,1,1)

ri.TransformEnd()



ri.TransformBegin() 

ri.Translate(2,0,0)

ri.Rotate(-25,1,1,1)

ri.Color([0,1,0])

Cube(0.2,2,0.2);

ri.TransformEnd()



ri.WorldEnd()

ri.End()

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• RenderMan
• 2010.11.28 Sunday

イギリスのbournemouth universityを参考にしてます。ありがとうございます。Thank You.
RenderManProServer-14からついているimport prmanを利用します。

#inlinearchive_pr.py

#set PYTHONPATH=C:\Python25;C:\Python\Scripts;%RMANTREE%\bin

import getpass

import time

# import the python renderman library

import prman



ri = prman.Ri() # create an instance of the RenderMan interface

ri.Option("rib", {"string asciistyle": "indented"})



filename = "InlineArchive.rib"



ri.Begin(ri.RENDER)



ri.ArchiveBegin("Wave")

ri.Rotate(90,1,0,0)

ri.Sphere(0.030303,-0.030303,0,360) 

ri.Torus(0.0606061,0.030303,0,180,360) 

ri.Torus(0.121212,0.030303,180,360,360) 

ri.Torus(0.181818,0.030303,0,180,360) 

ri.Torus(0.242424,0.030303,180,360,360) 

ri.Torus(0.30303,0.030303,0,180,360) 

ri.Torus(0.363636,0.030303,180,360,360) 

ri.Torus(0.424242,0.030303,0,180,360)

ri.Torus(0.484848,0.030303,180,360,360) 

ri.Torus(0.545455,0.030303,0,180,360)

ri.Torus(0.606061,0.030303,180,360,360) 

ri.Torus(0.666667,0.030303,0,180,360)

ri.Torus(0.727273,0.030303,180,360,360) 

ri.Torus(0.787879,0.030303,0,180,360) 

ri.Torus(0.848485,0.030303,180,360,360) 

ri.ArchiveEnd()



#ArchiveRecord is used to add elements to the rib stream in this case comments

# note the function is overloaded so we can concatinate output

ri.ArchiveRecord(ri.COMMENT, 'File ' +filename)

ri.ArchiveRecord(ri.COMMENT, "Created by " + getpass.getuser())

ri.ArchiveRecord(ri.COMMENT, "Creation Date: " +time.ctime(time.time()))



# now we add the display element using the usual elements

# FILENAME DISPLAY Type Output format

ri.Display("InlineArchive.png", "file", "rgb")

ri.Format(512, 384, -1.0)

ri.Projection(ri.PERSPECTIVE,{ri.FOV:30}) 



# now we start our world

colours ={

	"red":[1,0,0],

	"white":[1,1,1],

	"green":[0,1,0],

	"blue":[0,0,1],

	"black":[0,0,0],

	"yellow":[1,1,0]

	}



# start our world

ri.WorldBegin()

ri.LightSource("distantlight", {ri.HANDLEID: "1","to":[0,0,1]})

ri.LightSource("ambientlight", {ri.HANDLEID: "2", "intensity":[0.4]})



ri.Translate(0,0,9) #move the global view position

ri.Surface("plastic")



ri.TransformBegin()

ri.Rotate(40,1,0,0)

ri.Color(colours["red"])

ri.Attribute ("identifier",{"name": "Wave1"})

ri.ReadArchive("Wave")

ri.TransformEnd()



ri.TransformBegin()

ri.Rotate(55,1,0,0)

ri.Color(colours["green"]) 

ri.Translate(2.2,0,0)

ri.Attribute( "identifier",{ "name" :"Wave2"})

ri.ReadArchive("Wave")

ri.TransformEnd()



ri.TransformBegin()

ri.Rotate(35,1,0,0)

ri.Color(colours["blue"])

ri.Translate(-2.2,0,0)

ri.Attribute("identifier",{ "name" : "Wave3"})

ri.ReadArchive("Wave")

ri.TransformEnd()

#end our world



ri.WorldEnd()

ri.End()

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• RenderMan
• 2010.11.28 Sunday

引き続き、イギリスのbournemouth universityを参考にしてます。ありがとうございます。勉強になります。Csを球にセットしてます。
RenderManProServer-14からついているimport prmanを利用します。

#param_pr.py

#set PYTHONPATH=C:\Python25;C:\Python\Scripts;%RMANTREE%\bin

import getpass

import time

# import the python renderman library

import prman



ri = prman.Ri() # create an instance of the RenderMan interface

ri.Option("rib", {"string asciistyle": "indented"})



filename = "Param.rib"

ri.Begin(ri.RENDER)

# ArchiveRecord is used to add elements to the rib stream in this case comments

# note the function is overloaded so we can concatinate output

ri.ArchiveRecord(ri.COMMENT, 'File ' +filename)

ri.ArchiveRecord(ri.COMMENT, "Created by " + getpass.getuser())

ri.ArchiveRecord(ri.COMMENT, "Creation Date: " +time.ctime(time.time()))



# now we add the display element using the usual elements

# FILENAME DISPLAY Type Output format

ri.Display("Param.png", "file", "rgb")

ri.Format(512, 384, -1.0)

# now set the projection to perspective

ri.Projection(ri.PERSPECTIVE,{ri.FOV:50}) 



# now we start our world

ri.WorldBegin()

ri.LightSource("distantlight", {ri.HANDLEID: "1","to":[0,-1,1]})

ri.LightSource("ambientlight", {ri.HANDLEID: "2", "intensity":[0.4]})



ri.Translate(0,0,3)

ri.TransformBegin()

colours=[1,0,0,0,0,1,1,0,0,0,1,0]

ri.Rotate(90,1,1,1)

ri.Surface("plastic")

ri.Sphere(1,-1,1,360,{"Cs":colours})

ri.TransformEnd()

ri.WorldEnd()

ri.End()

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• RenderMan
• 2010.11.28 Sunday

ケッソン先生のCG References & Tutorials(fundza.com)の RenderMan Procedural Primitives、Randomnessのサンプルをimport prmanでできるようにしてみた。ありがとうございます。
ri.Points({ri.P:points,ri.CS:colour,ri.CONSTANTWIDTH:size})
TypeError: Problem parsing parameterlist entry: varying color Cs
とエラーが出ていたが、pointsのリスト表記を[[1,2,3],[4,5,6],・・・]としていたのが原因だった。[1,2,3,4,5,6,・・・]となるように書き換えた。

Pointsを50000個、直方体に配置してみました。さらに勉強します。

#rectangularbox_pr2.py

#Modified from RenderMan Procedural Primitives/ Randomness Examples

# in CG References & Tutorials(fundza.com) 



#set PYTHONPATH=C:\Python25;C:\Python\Scripts;%RMANTREE%\bin

import getpass

import time

# import the python renderman library

import prman



import random,math



def randBetween(min, max):

    return random.random() * (max - min) + min 



def length(x, y, z):

    return math.sqrt(x*x + y*y + z*z)



def normalize(x, y, z):

    len = length(x, y, z)

    return x/len, y/len, z/len 



def scaleVector(x, y, z, sc):

    return x*sc, y*sc, z*sc



def box(width, height, depth, num, size):

    points=[]

    pappend=points.append

    for n in range(num):

        x = randBetween(-width/2, width/2)

        y = randBetween(-height/2, height/2)

        z = randBetween(-depth/2, depth/2)

        pappend(x)

        pappend(y)

        pappend(z)

    colour=[]

    for n in range(num):

        r = randBetween(0, 1)

        g = randBetween(0, 1)

        b = randBetween(0, 1)

        colour.append(r)

        colour.append(g)

        colour.append(b)

        

    

    ri.Points({ri.P:points,ri.CS:colour,ri.CONSTANTWIDTH:size})





ri = prman.Ri() # create an instance of the RenderMan interface

ri.Option("rib", {"string asciistyle": "indented"})



filename = "rectangularbox.rib"

ri.Begin(ri.RENDER)

#ri.Begin(filename)

# ArchiveRecord is used to add elements to the rib stream in this case comments

# note the function is overloaded so we can concatinate output

ri.ArchiveRecord(ri.COMMENT, 'File ' +filename)

ri.ArchiveRecord(ri.COMMENT, "Created by " + getpass.getuser())

ri.ArchiveRecord(ri.COMMENT, "Creation Date: " +time.ctime(time.time()))



# now we add the display element using the usual elements

# FILENAME DISPLAY Type Output format

ri.Display("rectangularbox.png", "file", "rgb")

ri.Format(512, 384, -1.0)

ri.Imager("background", {"color color":(.76,.79,.82)})

# now set the projection to perspective

ri.Projection(ri.PERSPECTIVE,{ri.FOV:50}) 



# now we start our world

ri.WorldBegin()

ri.LightSource("distantlight", {ri.HANDLEID: "1","to":[0,1,1]})

ri.LightSource("ambientlight", {ri.HANDLEID: "2", "intensity":[0.4]})



ri.Translate(0,0.25,3)

ri.Rotate(-40,1,0,0)

ri.TransformBegin()

ri.Rotate(35,0,1,0)

ri.Surface("plastic")

box(2.0, 1.0, 2.0, 50000, 0.02)

ri.TransformEnd()

ri.WorldEnd()

ri.End()

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