Rendering学習日記

PythonプログラムをRenderMan RIBで実行するテスト
RIBの出力:

import sys

args = sys.stdin.readline()

while args:

    values = args.split()

    pixels = float(values[0])

    rad = float(values[1])

    print 'TransformBegin'

    print 'Sphere %s %s %s 360' % (rad, -rad, rad)

    print 'TransformEnd'



    sys.stdout.write('\377')

    sys.stdout.flush()

    

    # read the next set of inputs

    args = sys.stdin.readline()

RunProgram例:

Display "untitled" "framebuffer" "rgb"

Format 400 400 1

Projection "perspective" "fov" 30

ShadingRate 5



LightSource "distantlight" 1 "intensity" 1.5 "from" [0 0 0] "to" [0 0 1]



Translate  0 0 5

Rotate -30 1 0 0

Rotate 20   0 1 0

Scale 1 1 -1



WorldBegin

       TransformBegin

               Surface "plastic" "Ks" 0.6

               Procedural "RunProgram" ["python pytest.py"  "1.0"] [-1 1 -1 1 -1 1]

       TransformEnd

WorldEnd

ケッソン先生のサイト参考になります。ありがとうございます。

RIBの出力:

#sp_rect2.py

import sys

import random



while sys.stdin.readline():



    dist = 1

    x = 0.0

    distx = 10.0

    disty = 10.0

    distz = 10.0

    while x <= distx:

        z = 0.0

        while z <= distz:

            y = 0.0

            while y <= disty:

                r = random.random() * .5

                sys.stdout.write("TransformBegin\n")

                sys.stdout.write("Translate " + str(x - 5.0) + " " + str(y - 5.0) + " " + str(z - 5.0) + "\n")

                sys.stdout.write('Sphere [' + str(r) + ' -1 1 360]\n')

                sys.stdout.write("TransformEnd\n")

                y += dist

            z += dist

        x += dist

    sys.stdout.write('\377')

    sys.stdout.flush()

いろいろと調整してみる。実行RIB:

Display "untitled" "framebuffer" "rgb"

Format 640 480 1

Projection "perspective" "fov" 30

ShadingRate 5



LightSource "distantlight" 1 "intensity" 1.5 "from" [0 0 0] "to" [0 0 1]



Translate  0 0 30

Rotate -30 1 0 0

Rotate 20   0 1 0

Scale 1 1 -1



WorldBegin

        TransformBegin

                Surface "plastic" "Ks" 0.6

                Procedural "RunProgram" ["python sp_rect2.py"  ""] [-9.91912 9.91912 -9.91912 9.91912 -9.91912 9.91912]

        TransformEnd

WorldEnd

Python Cgkitも勉強。面白いところです。(2008.8/4記事)
別ブログが転居するので転載しました。ありがとうございます。感謝しています。

cgkitへRIBを呼び出す。

r=RIBArchive(

filename = 'butu.rib', pos = (0,0,0) )

r.rib='Color 0.9 0.9 1.0\nSurface "plastic"' #r.rib='Surface "check_ref'



t=RIBArchive(

filename = 'butu.rib', pos = (0.5,0,0) )

t.rib='Color 1 0.9 0.9\nSurface "plastic"'



Plane(

lx = 50, ly = 50, pos = (0,0,0.6), material = GLMaterial(diffuse=(0.8, 0.7, 0.7)) )

Plane(

lx = 50, ly = 50, pos = (0,-0.44,0), rot= mat3().fromEulerXYZ(radians(90), 0, 0), material = GLMaterial(diffuse=(0.8, 0.6, 0.6)) )

s=RIBArchive(

filename = 'butu.rib', pos = (-0.5,0,0) )

s.rib='ShadingRate 0.25\nAttribute "trace" "int displacements" [1]\nAttribute "displacementbound" "float sphere" [0.001] "string cordinatesystem" ["shader"]\nDeclare "Km" "uniform float"\nDisplacement "dented" "Km" 0.05\nSurface "metal" "Ks" [1.5] "roughness" [1.0]\nColor [ 0.8 0.8 0.8 ]'

ありがとうございます。。(2009.8/16記事)