Rendering学習日記

「実践CGへの誘い」p.25
Listing 2.3

#list23.py

# Copyrighted Pixar 1989

# From the RenderMan Companion p. 25

# Listing 2.3   Control over viewer and color



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())



L= -.5      #* For x: left side     */

R=  .5      # /* For x: right side    */

D= -.5     #  /* For y: down side     */

U=  .5     #  /* For y: upper side    */

F=  .5     #  /* For z: far side      */

N= -.5     #  /* For z: near side     */



#/* UnitCube(): define a cube in the graphics environment */

def UnitCube():

    Cube=[

        [ [L,D,F],  [L,D,N],  [R,D,N],  [R,D,F] ],   #/* Bottom face  */

        [ [L,D,F],  [L,U,F],  [L,U,N],  [L,D,N] ],   #/* Left face    */

        [ [R,U,N],  [L,U,N],  [L,U,F],  [R,U,F] ],   #/* Top  face    */

        [ [R,U,N],  [R,U,F],  [R,D,F],  [R,D,N] ],   #/* Right face   */

        [ [R,D,F],  [R,U,F],  [L,U,F],  [L,D,F] ],   #/* Far face     */

        [ [L,U,N],  [R,U,N],  [R,D,N],  [L,D,N] ]    #/* Near face    */

    ];

    for i in range(6):

        RiPolygon(P=Cube[i])





#square=[.5,.5,.5,.5,-.5,.5,-.5,-.5,.5,-.5,.5,.5]



color=(.2,.4,.6)



RiBegin(RI_NULL)

RiDisplay("list23.tif", RI_FRAMEBUFFER, RI_RGB)

RiFormat(640,480, -1.0)

RiShadingRate(1.0)

RiLightSource("distantlight", RI_NULL)

RiProjection(RI_PERSPECTIVE)

RiWorldBegin()

RiTranslate(0.0, 0.0, 1.5)

RiRotate(40.0, -1.0, 1.0, 0.0)

RiSurface("matte",RI_NULL)

RiColor(color)

UnitCube()

#RiPolygon(P=square)

RiWorldEnd()

RiEnd()

Pixar RenderManのPython APIとcgkitでの記述を並べてみた。
import prmanでは、パラメータを辞書形式で記述。後はほとんど同じ感じてす。
以下は、ティーポットの表示
■import prman

#test2.py

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

import prman

ri=prman.Ri()

rendertarget="test2.rib"

ri.Begin(ri.RENDER)

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

ri.Display("teapot2.png", "file", "rgb")

ri.Format(640,480,1)

ri.Projection(ri.PERSPECTIVE, {ri.FOV: 45})

ri.Translate(0,0,10)

ri.WorldBegin()

ri.LightSource("pointlight", {ri.HANDLEID: "1", "from": [-10,10,-10],"intensity":[300]})

ri.LightSource("pointlight", {ri.HANDLEID: "2", "from": [10,10,-10],"intensity":[300]})

ri.LightSource("pointlight", {ri.HANDLEID: "3", "from": [-10,-10,-10],"intensity":[300]})

ri.Color((0.9,0,0.1))

ri.Surface("plastic")

ri.Translate(0,-1,0)

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

ri.Geometry("teapot")

ri.WorldEnd()

ri.End()

■cgkit
3Delightを利用した。

#min2.py

import cgkit.cri



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

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



RiBegin(RI_NULL)

RiImager("background", "color background",(.2,.4,.6))

RiDisplay("min2.png", RI_FILE, RI_RGB)

RiProjection(RI_PERSPECTIVE,RI_FOV,45)

RiTranslate(0,0,10)

RiWorldBegin()

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

#RiLightSource("distantlight")

RiLightSource("pointlight", RI_HANDLEID, "1", "from",[-10,10,-10],"intensity",[300])

RiLightSource("pointlight", RI_HANDLEID, "2", "from",[10,10,-10],"intensity",[300])

RiLightSource("pointlight", RI_HANDLEID, "3", "from",[-10,-10,-10],"intensity",[300])

RiSurface("plastic")

RiColor((1,0.2,0.2))

RiTranslate(0,-1,0)

RiRotate(-90,1,0,0)

RiReadArchive("teapot.rib")

RiWorldEnd()

RiEnd()

「実践CGへの誘い」p.28
Listing 2.5
TransformBegin()〜TransformEnd()を使ったサンプル
ありがたいです。

#list25.py

#/* Copyrighted Pixar 1989 */

#/* From the RenderMan Companion p. 28 */

#/* Listing 2.5  Another cube definition */



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())



#/* UnitCube(): Enter a unit cube into the scene */



def UnitCube():

    square = [ [.5,.5,.5], [-.5,.5,.5], [-.5,-.5,.5], [.5,-.5,.5] ]

    RiTransformBegin()

    #/* far square */

    RiPolygon( RI_P, square, RI_NULL)

    #/* right face */

    RiRotate(90.0, 0.0, 1.0, 0.0)

    RiPolygon( RI_P, square, RI_NULL)

    #/* near face */

    RiRotate(90.0, 0.0, 1.0, 0.0)

    RiPolygon( RI_P, square, RI_NULL)

    #/* left face */

    RiRotate(90.0, 0.0, 1.0, 0.0)

    RiPolygon( RI_P, square, RI_NULL)

    RiTransformEnd()

    

    RiTransformBegin()

    #/* bottom face */

    RiRotate(90.0, 1.0, 0.0, 0.0)

    RiPolygon( RI_P, square, RI_NULL)

    RiTransformEnd()

    

    RiTransformBegin()

    #/* top face */

    RiRotate(-90.0, 1.0, 0.0, 0.0)

    RiPolygon( RI_P, square, RI_NULL)

    RiTransformEnd()



color=(.9,.1,.2)



RiBegin(RI_NULL)

RiDisplay("list25.tif", RI_FRAMEBUFFER, RI_RGB)

RiFormat(640,480, -1.0)

RiShadingRate(1.0)

RiLightSource("distantlight", RI_NULL)

RiProjection(RI_PERSPECTIVE)

RiWorldBegin()

RiTranslate(0.0, 0.0, 1.5)

RiRotate(40.0, -1.0, 1.0, 0.0)

RiSurface("matte",RI_NULL)

RiColor(color)

UnitCube()

RiWorldEnd()

RiEnd()