Rendering学習日記

guile-rmanでのRiPointsでは"constantwidth"を使う。ありがとうございます。

#!/usr/bin/guile -s

!#



(use-modules (rman rispec))

(use-modules (rman utilities))



(RiBegin "points4.rib")

  (RiDisplay "points4.tif" "file" "rgb")

  (RiFormat 640 480 1)

  (RiProjection "perspective" '("fov" 30))

  (RiTranslate 0 0 3)

  (RiPixelFilter RiBoxFilter 1 1)

  (RiWorldBegin)

      (RiLightSource "ambientlight" (list "intensity" 0.2))

      (RiLightSource "distantlight" (list "intensity" 1.2 ))

      (RiAttributeBegin)

      (RiColor (Color 1 0 0))

      (RiSurface "plastic")

      (RiTransformBegin)

      (RiTranslate -0.5 -0.5 0)

      (RiPoints 4 (list "P" #f32(0 0 0 0 1 0 1 1 0 1 0 0) "constantwidth" 0.4))

      (RiTransformEnd)

      (RiAttributeEnd)

  (RiWorldEnd)

(RiEnd)

やっと、わかりました。PixarのRenderMan C Bindingにヒントがありました。bulb.cを参考にしました。ありがとうございます。
guile-rmanでのRtLightHandleの記述例：

(define light2 (RiLightSource "distantlight" (list "intensity" 1.2 )))

(RiIlluminate light2 0 )

LightID、"light2"をRiIlluminateでオフ(0)にしています。
以下は、サンプルilluminate.scm
ambientlightのみの灯りになっています。

#!/usr/bin/guile -s

!#



(use-modules (rman rispec))

(use-modules (rman utilities))



(RiBegin "illum.rib")

  (RiDisplay "illum.tif" "file" "rgb")

  (RiFormat 640 480 1)

  (RiProjection "perspective" '("fov" 30))

  (RiTranslate 0 0 5)

;  (RiProgressHandler progress)

  (RiPixelFilter RiBoxFilter 1 1)

  (RiWorldBegin)

      (display (RiLightSource "ambientlight" (list "intensity" 0.2)))

       (newline)

      (define light2 (RiLightSource "distantlight" (list "intensity" 1.2 )))

       (newline)

      (RiIlluminate light2 0 )

      (RiAttributeBegin)

      (RiColor (Color 1.0 0.6 0.0))

      (RiSurface "plastic")

      (RiTransformBegin)

      (RiRotate 90 1 0 0)

      (RiSphere 1 -1 1 360)

      (RiTransformEnd)

      (RiAttributeEnd)

  (RiWorldEnd)

(RiEnd)

FramBegin〜Endを使ってAqsisサンプルのSoftshadowをguile-rmanで生成してみました。

#!/usr/bin/guile -s

!#

(use-modules (rman rispec))

(use-modules (rman utilities))



(RiBegin "illum3.rib")

;;(RiOption "limits" (list "bucketsize" #f32(32 32)))

(RiOption "limits" (list "eyesplits" 10))

(RiDeclare "bias" "float")

(RiHider "hidden" (list "depthfilter" "midpoint"))

(RiDisplay "softshadow.zfile" "zfile" "z")

(RiClipping 0.01 10)

(RiSides 2)

  (RiFormat 512 512 1)

  (RiPixelFilter RiBoxFilter 2 2)

(RiPixelSamples 1 1)

(RiShadingRate 2)



(RiFrameBegin 1)

(RiProjection "perspective" '("fov" 57.30))

(RiRotate -35.26 1.00 0.00 0.00)

(RiRotate 45.00 0.00 1.00 0.00)

(RiTranslate -5.00 -5.00 5.00)



(RiWorldBegin)

  (RiSurface "null")

  (RiSphere 1 -1 1 360)

(RiWorldEnd)

(RiFrameEnd)



(RiMakeShadow "softshadow.zfile" "softshadow.shad")





(RiDisplay "illum3.tif" "file" "rgba")

(RiFormat 512 384 1)



(RiPixelFilter RiGaussianFilter 2 2)

(RiPixelSamples 2 2)

(RiClipping 0.2 10)

(RiShadingRate 1)

(RiFrameBegin 2)



  (RiProjection "perspective" '("fov" 45))

  (RiTranslate 0 0 5)

  (RiRotate -25 1 0 0)



(RiWorldBegin)

(RiLightSource "ambientlight" (list "intensity" 0.2))

(RiLightSource "shadowspot" (list "intensity" 80

                              "from" (Point 5 5 -5)

                              "to" (Point 0 0 0)

                              "coneangle" 0.5

                              "float blur" 0.03 

                              "string shadowname" "softshadow.shad"))



(RiColor (Color 0.4 0.4 0.1))

(RiSurface "matte")

(RiSphere 1 -1 1 360)



(RiOrientation "rh")

(RiColor (Color 0.5 0 0))

(RiSurface "matte")

(RiPatch "bilinear" (list "P" #f32(-10 -1 -10

                         10 -1 -10

                        -10 -1  10

                         10 -1  10)))

(RiWorldEnd)

(RiFrameEnd)

(RiEnd)

Max eyesplits for object "unnamed" exceeded
Object "unnamed" spans the epsilon plane
Object "unnamed" spans the epsilon plane
Max eyesplits for object "unnamed" exceeded
Object "unnamed" spans the epsilon plane
Max eyesplits for object "unnamed" exceeded
が出ますがレンダリングできました。