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PythonからRenderMan　その12

Jon Macey Computer Animation Pages参考にしています。Thank you.
Torus animationです。
ProcGeom001.jpg
ProcGeom002.jpg
ProcGeom003.jpg
ProcGeom014.jpg
ProcGeom029.jpg



#proc_geom.py

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

import getpass

import time

# import the python renderman library

import prman



def TorusWave(ri,nwaves,thetamax) :

    if(nwaves < 1) :

        print "need positive number of waves"

        return

    innerrad = 2.0/(8.0 * nwaves +2)

    ri.Rotate(90.0,1.0,0.0,0.0)

    ri.Sphere(innerrad,-innerrad,0,thetamax)

    outerrad =0.0

    for wave in range(1,nwaves) :

        outerrad=outerrad+(innerrad*2)

        ri.Torus(outerrad,innerrad,0.0,180.0,thetamax)

        outerrad=outerrad+(innerrad*2)

        ri.Torus(outerrad,innerrad,180.0,360.0,thetamax)

    





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

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





for frame in range(1,30) :

    filename = "Wave.%03d.rib" %(frame)

    ri.Begin(ri.RENDER)

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

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

    # 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("ProcGeom%03d.tif" %(frame), "file", "rgb")

    # Specify PAL resolution 1:1 pixel Aspect ratio

    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.Translate(0,0,2)

    

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

    

    ri.TransformBegin()

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

    TorusWave(ri,frame,360.0)

    ri.TransformEnd()

    ri.WorldEnd()

    

    # and finally end the rib file

    ri.End()

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