Rendering学習日記

Aqsis1.6では、
Attribute "autoshadows" "string shadowmapname" ["autoshadow.shad"] "integer res" [600]
を利用して、影の自動生成を行います。

これと、もう一つ
Option "Render" "integer multipass" [1]
がないと、シャドウマップは生成されません。


以下、Aqsis1.6.0のサンプルautoshadow.ribを参考にしました。

#!/usr/bin/guile -s

!#

(use-modules (rman rispec))

(use-modules (rman utilities))



(RiBegin "illum2.rib")

(RiOption "Render" (list "integer multipass" 1))

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

  (RiDisplay "illum2.tif" "file" "rgb")

  (RiFormat 512 384 1)

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

  (RiTranslate 0 0 3)

  (RiRotate -40 1 0 0)

  (RiRotate -20 0 1 0)

  (RiPixelFilter RiGaussianFilter 2 2)

  (RiWorldBegin)

      (RiLightSource "ambientlight" (list "intensity" 0.3))

  (RiAttributeBegin)

    (RiAttribute "autoshadows" (list "string shadowmapname" "autoshadow.shad" "integer res" 4096))

    (RiTranslate 5 5 -5)

    (RiRotate -45 0.0 1.0 0.0)

    (RiRotate 35 1.0 0.0 0.0)

    (define light1 (RiLightSource "shadowspot" (list "intensity" 300

                                  "coneangle" 0.5 

                                  "string shadowname" "autoshadow.shad" 

                                  )))

  (RiAttributeEnd)

   (RiIlluminate light1 1 )

      (RiAttributeBegin)



      (RiTransformBegin)

      (RiColor (Color 0.8 0.8 0.8))

      (RiSurface "plastic")

      (RiPolygon 4 (list "P" #f32(-1 0 -1 -1 0 1  1 0 1 1 0 -1)))

      (RiTransformEnd)



      (RiTransformBegin)

      (RiColor (Color 0.8 0.4 0.2))

      (RiSurface "plastic")

      (RiRotate -90 1 0 0)



      (RiScale 0.2 0.2 0.2)

      (RiGeometry "teapot")

      (RiTransformEnd)



      (RiAttributeEnd)

  (RiWorldEnd)

(RiEnd)

"integer res" 1024
"float blur" 0.008
と調整してみた。

(RiAttributeBegin)

    (RiAttribute "autoshadows" (list "string shadowmapname" "autoshadow.shad" "integer res" 1024))

    (RiTranslate 5 5 -5)

    (RiRotate -45 0.0 1.0 0.0)

    (RiRotate 35 1.0 0.0 0.0)

    (define light1 (RiLightSource "shadowspot" (list "intensity" 300

                                  "coneangle" 0.5 

                                  "float blur" 0.008 

                                  "string shadowname" "autoshadow.shad" 

                                  )))

  (RiAttributeEnd)

関数を定義し、繰り返し処理を行いました。

いろいろできそうです。

#!/usr/bin/guile -s

!#



(use-modules (rman rispec))

(use-modules (rman utilities))



(RiBegin "test6.rib")

  (RiDisplay "sphere6.tif" "file" "rgb")

  (RiFormat 640 480 1)

  (RiProjection "perspective" '("fov" 40.0))

  (RiTranslate 0 0 6)

  (RiPixelFilter RiBoxFilter 1 1)

  (RiWorldBegin)

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

      (RiLightSource "distantlight" (list "intensity" 1.2 

                                        "uniform point from"  (Point 3 3 -3)))



(define (test x)

    (define posx -3)

    (let ((n 0))

        (while (< n x)

    (RiTransformBegin)

    (set! posx (+ posx 1 ))

    (RiTranslate posx 0 0 )

    (RiColor (Color .9 .1 .1))

    (RiSurface "plastic")

    (RiSphere 0.5 -0.5 0.5 360)

    (set! n (+ n 1))

 (RiTransformEnd)

)))



(test 5)



  (RiWorldEnd)

(RiEnd)

(use-modules (rman ri2rib))
を使うと空のRIBが出るだけで、課題です。
以下、エラー。
guile: symbol lookup error: /usr/local/lib/libguile_rman_ri2rib.so: undefined symbol: RifGetDeclaration

球体の色を徐々に変化させてみた。
guile-rmanとAqsis1.6　(CentOS6.4 64bitで稼働。)

#!/usr/bin/guile -s

!#



(use-modules (rman rispec))

(use-modules (rman utilities))



(RiBegin "test7.rib")

  (RiDisplay "sphere7.tif" "file" "rgb")

  (RiFormat 640 480 1)

  (RiProjection "perspective" '("fov" 40.0))

  (RiTranslate 0 0 6)

  (RiPixelFilter RiBoxFilter 1 1)

  (RiWorldBegin)

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

      (RiLightSource "distantlight" (list "intensity" 1.2 

                                        "uniform point from"  (Point 3 3 -3)))



(define (test x)

    (define posx -3)

    (define col 0.2)

    (define col2 0.9)

    (let ((n 0))

        (while (< n x)

    (RiTransformBegin)

    (set! posx (+ posx 1 ))

    (RiTranslate posx 0 0 )

    (set! col (+ col .2))

    (set! col2 (- col2 .2))

    (RiColor (Color col .2 col2))

    (RiSurface "plastic")

    (RiSphere 0.5 -0.5 0.5 360)

    (set! n (+ n 1))

 (RiTransformEnd)

)))



(test 5)



  (RiWorldEnd)

(RiEnd)