Community

samhodge · 2009-02-24 21:51:50

I made a couple of shaders to debug something we are having an issue with on production

Indirect Diffuse

Code:

surface indirectDiffuseDebug
(
    uniform string lightSpace= "lightSpace";
    uniform string lightMap = "lightMap";
)
{
    normal _Nn = normalize(ntransform("current",lightSpace,normalize(N)));
    varying color indirectDiffuseDebug = indirectdiffuse ( lightMap, _Nn ) ;
    Oi = Os;
    Ci = Cs;
    Ci *= indirectDiffuseDebug;
    Ci *= Oi;
}

Reflection

Code:

surface reflectionDebug
(
    uniform string lightSpace= "lightSpace";
    uniform string lightMap = "lightMap";
)
{
    normal R = normalize(ntransform("current",lightSpace,normalize(reflect(I,normalize(N)))));
    varying color reflection = environment ( lightMap, R ) ;
    Oi = Os;
    Ci = Cs;
    Ci *= reflection;
    Ci *= Oi;
}

Two Nurbs Spheres and a Coordsystem and the shaders above
I will attach a maya scene if I can work out how to do that soon

The envGrey.tdl is a grey map created from a tif

Code:

tdlmake -envlatl input.tiff envGrey.tdl

There is a dark spot on the indirect diffuse sphere that is less than ideal

Here is the RIB, I hope I took out any specific customisation we are using

Code:

##RenderMan RIB-Structure 1.0
##Creator 3Delight 8.0.22 linux (Dec 12 2008) "Midnight Express"
##CreationDate Wed Feb 25 16:00:32 2009
# Scene cached for RIB output in 0.07s
#

Option "shutter" "float offset" [ 1 ]
#
# Start of geometry shader archives.
# {

ArchiveBegin "indirectDiffuseDebug1 surface"  # {
  Surface "/home/samh/dev/rspSVN/t4Shaders/share/delight/shaders/indirectDiffuseDebug"
    "uniform string lightSpace" [ "delightCoordinateSystemShape1" ]
    "uniform string lightMap" [ "envGrey.tdl" ]
ArchiveEnd  # }


ArchiveBegin "reflectionDebug1 surface"  # {
  Surface "/home/samh/dev/rspSVN/t4Shaders/share/delight/shaders/reflectionDebug"
    "uniform string lightSpace" [ "delightCoordinateSystemShape1" ]
    "uniform string lightMap" [ "envGrey.tdl" ]
ArchiveEnd  # }

# Geometry shader archives output in -2.182698466e-13s
#

# }
# End of geometry shader archives.
#

#
# Start of geometry archives.
# {

ObjectBegin "|nurbsSphere1|nurbsSphereShape1"  # {
  # |nurbsSphere1|nurbsSphereShape1
  NuPatch
    7 4 # nu uorder
    [ 0 0 0 0 0.25 0.5 0.75 1 1 1 1 ] 0 1 # umin umax
    11 4 # nv vorder
    [ -0.25 -0.25 -0.125 0 0.125 0.25 0.375 0.5 0.625 0.75 0.875 1
      1.125 1.25 1.25 ] 0 1 # vmin vmax
    "vertex hpoint Pw" [ 9.596475e-17 -1 -2.5316185e-16 1 0.1999168 -1 0.1999168 1 0.61643 -0.7836116 0.61643 1
      0.86720247 4.4113033e-17 0.86720247 1 0.61643 0.7836116 0.61643 1 0.1999168 1 0.1999168 1
      1.2304236e-16 1 3.4154717e-17 1 9.596475e-17 -1 -2.5316185e-16 1 0.28272503 -1 -5.512922e-17 1
      0.87176364 -0.7836116 1.268959e-16 1 1.2264094 9.7213866e-17 3.2082685e-16 1 0.87176364 0.7836116 3.2920823e-16 1
      0.28272503 1 2.030501e-16 1 1.2304236e-16 1 3.4154717e-17 1 9.596475e-17 -1 -2.5316185e-16 1
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      0.61643 0.7836116 -0.61643 1 0.1999168 1 -0.1999168 1 1.2304236e-16 1 3.4154717e-17 1
      9.596475e-17 -1 -2.5316185e-16 1 -1.8991932e-16 -1 -0.28272503 1 -4.2954374e-16 -0.7836116 -0.87176364 1
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      -0.28272503 -1 9.820774e-17 1 -0.87176364 -0.7836116 2.8758069e-16 1 -1.2264094 9.7213866e-17 3.9726926e-16 1
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      -5.4972927e-17 1 0.28272503 1 1.2304236e-16 1 3.4154717e-17 1 9.596475e-17 -1 -2.5316185e-16 1
      0.1999168 -1 0.1999168 1 0.61643 -0.7836116 0.61643 1 0.86720247 4.4113033e-17 0.86720247 1
      0.61643 0.7836116 0.61643 1 0.1999168 1 0.1999168 1 1.2304236e-16 1 3.4154717e-17 1
      9.596475e-17 -1 -2.5316185e-16 1 0.28272503 -1 -5.512922e-17 1 0.87176364 -0.7836116 1.268959e-16 1
      1.2264094 9.7213866e-17 3.2082685e-16 1 0.87176364 0.7836116 3.2920823e-16 1 0.28272503 1 2.030501e-16 1
      1.2304236e-16 1 3.4154717e-17 1 9.596475e-17 -1 -2.5316185e-16 1 0.1999168 -1 -0.1999168 1
      0.61643 -0.7836116 -0.61643 1 0.86720247 1.503147e-16 -0.86720247 1 0.61643 0.7836116 -0.61643 1
      0.1999168 1 -0.1999168 1 1.2304236e-16 1 3.4154717e-17 1 ]
ObjectEnd  # }

ObjectBegin "|nurbsSphere2|nurbsSphereShape2"  # {
  # |nurbsSphere2|nurbsSphereShape2
  NuPatch
    7 4 # nu uorder
    [ 0 0 0 0 0.25 0.5 0.75 1 1 1 1 ] 0 1 # umin umax
    11 4 # nv vorder
    [ -0.25 -0.25 -0.125 0 0.125 0.25 0.375 0.5 0.625 0.75 0.875 1
      1.125 1.25 1.25 ] 0 1 # vmin vmax
    "vertex hpoint Pw" [ 9.596475e-17 -1 -2.5316185e-16 1 0.1999168 -1 0.1999168 1 0.61643 -0.7836116 0.61643 1
      0.86720247 4.4113033e-17 0.86720247 1 0.61643 0.7836116 0.61643 1 0.1999168 1 0.1999168 1
      1.2304236e-16 1 3.4154717e-17 1 9.596475e-17 -1 -2.5316185e-16 1 0.28272503 -1 -5.512922e-17 1
      0.87176364 -0.7836116 1.268959e-16 1 1.2264094 9.7213866e-17 3.2082685e-16 1 0.87176364 0.7836116 3.2920823e-16 1
      0.28272503 1 2.030501e-16 1 1.2304236e-16 1 3.4154717e-17 1 9.596475e-17 -1 -2.5316185e-16 1
      0.1999168 -1 -0.1999168 1 0.61643 -0.7836116 -0.61643 1 0.86720247 1.503147e-16 -0.86720247 1
      0.61643 0.7836116 -0.61643 1 0.1999168 1 -0.1999168 1 1.2304236e-16 1 3.4154717e-17 1
      9.596475e-17 -1 -2.5316185e-16 1 -1.8991932e-16 -1 -0.28272503 1 -4.2954374e-16 -0.7836116 -0.87176364 1
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      -0.1999168 1 -0.1999168 1 1.2304236e-16 1 3.4154717e-17 1 9.596475e-17 -1 -2.5316185e-16 1
      -0.28272503 -1 9.820774e-17 1 -0.87176364 -0.7836116 2.8758069e-16 1 -1.2264094 9.7213866e-17 3.9726926e-16 1
      -0.87176364 0.7836116 2.7719785e-16 1 -0.28272503 1 8.4957776e-17 1 1.2304236e-16 1 3.4154717e-17 1
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      9.290196e-17 -0.7836116 0.87176364 1 5.589015e-17 2.2117946e-17 1.2264094 1 -1.34456173e-17 0.7836116 0.87176364 1
      -5.4972927e-17 1 0.28272503 1 1.2304236e-16 1 3.4154717e-17 1 9.596475e-17 -1 -2.5316185e-16 1
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      1.2304236e-16 1 3.4154717e-17 1 9.596475e-17 -1 -2.5316185e-16 1 0.1999168 -1 -0.1999168 1
      0.61643 -0.7836116 -0.61643 1 0.86720247 1.503147e-16 -0.86720247 1 0.61643 0.7836116 -0.61643 1
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ObjectEnd  # }
#
# Start of instancer archives.
# End of instancer archives.
#

# Geometry archives output in -2.182698466e-13s
#

# }
# End of geometry archives.
#

#
# Start of RIB options.
# {
Option "limits" "integer[2] bucketsize" [ 16 16 ]
Option "limits" "integer gridsize" [ 256 ]
Option "limits" "integer texturememory" [ 32768 ]
Option "limits" "integer eyesplits" [ 10 ]
Option "limits" "color othreshold" [ 0.99608 0.99608 0.99608 ]
Option "trace" "integer maxdepth" [ 1 ]
Option "render" "string bucketorder" [ "horizontal" ]
Option "searchpath" "string shader" [ "@:" ] "string texture" [ "@" ] "string procedural" [ "@" ]
Option "searchpath" "string procedural" [ "&:$DELIGHT/lib" ]
Option "user" "integer delight_curr_frame" [ 1 ]
Option "user" "string delight_shader_collection" [ "" ]
Option "user" "string delight_renderpass_name" [ "PreviewRenderPass" ]
Option "statistics" "integer endofframe" [ 0 ] "string filename" [ "" ]
Option "render" "integer standardatmosphere" [ 0 ]
Orientation "rh"
ShadingInterpolation "smooth"
# RIB options output in -2.182698466e-13s
#

# }
# End of RIB options.
#


FrameBegin 1  # {
  ShadingRate 1
  PixelSamples 3 3
  Hider "hidden"
    "integer jitter" [ 1 ]
  Display "bustedImage.tif" "tiff" "rgba"
    "float[2] exposure" [ 1 1 ]
    "float[4] quantize" [ 0 0 0 0 ]
    "float dither" [ 0.5 ]
    "string filter" [ "gaussian" ]
    "float[2] filterwidth" [ 2 2 ]
    "string cameraname" [ "perspShape" ]
  Format 1024 778 0.9999975
  Projection "perspective"
    "fov" [ 54.432225 ]
  ScreenWindow -1 1 -0.75976754 0.75976754
  Clipping 0.1 1e3
  Attribute "user" "float _3dfm_near_clipping_plane" [ 0.1 ]
  Attribute "user" "float _3dfm_far_clipping_plane" [ 1e3 ]
  Shutter 1 1
  Option "shutter" "float[2] efficiency" [ 1 1 ]
  CropWindow 0 1 0 1

  #
  # maya cameras named coordinate systems
  TransformBegin  # {
    Identity
    Perspective 54.432225
    Scale 1 1 -1
    ConcatTransform [ 0.745476 0.19641381 -0.63693578 0 -1.6154007e-17 0.95559598 0.29468005 0 0.66653245 -0.21967691 0.71237386 0
        1.0751489e-14 1.11310293e-13 -14.368383 1 ]
    CoordinateSystem "mayaCamera:persp"
    Option "user" "float persp_camera_aspectRatio" [ 1.5 ]
  TransformEnd  # }
  #
  # render camera: perspShape
  Scale 1 1 -1
  CoordinateSystem "mayaCamera"
  ConcatTransform [ 0.745476 0.19641381 -0.63693578 0 -1.6154007e-17 0.95559598 0.29468005 0 0.66653245 -0.21967691 0.71237386 0
      1.0751489e-14 1.11310293e-13 -14.368383 1 ]

  WorldBegin  # {
    #
    # start coordinate systems
    TransformBegin  # {
      Transform [ 1 0 -0 0 -0 1.7932704e-16 -1 0 0 1 1.7932704e-16 0
          0 0 0 1 ]
      CoordinateSystem "delightCoordinateSystemShape1"
    TransformEnd  # }
    #
    # end coordinate systems
    #
    # start lights

    AttributeBegin  # {
      Attribute "identifier" "string name" [ "|persp|directionalLight1|directionalLightShape1" ]
      Transform [ 0.40645004 0.12453717 0.90514577 0 0.55511857 0.75319504 -0.35290306 0 -0.72570085 0.64590066 0.23700326 0
          -9.151737 4.234076 10.2356606 1 ]
      Scale 1 1 -1
      IfBegin "!defined(user:_3dfm_filter_lightsource) || $user:_3dfm_filter_lightsource == 0"
        LightSource "/film/setup/t4/hk/hk185/3d/maya/3delight/untitled/shaders/OBJ/directionalLightShape1" "directionalLightShape1"
          "string __category" [ "specular,diffuse" ]
          "string shadowmapname" [ "" ]
      IfEnd
    AttributeEnd  # }

    Illuminate "directionalLightShape1" 1
    #
    # end lights
    #
    # start geometry

    AttributeBegin  # {
      Attribute "identifier" "string name" [ "|nurbsSphere1|nurbsSphereShape1" ]
      Attribute "user" "string delight_shortest_unique_name" [ "nurbsSphereShape1" ]
      Transform [ 1 0 0 0 0 1 0 0 0 0 1 0
          0 0 0 1 ]
      # Start render stats {
      IfBegin "!defined(ShadowMapRendering)"
        # Casts Shadows render stats is on
        Attribute "visibility" "integer transmission" [ 1 ]
        Attribute "shade" "string transmissionhitmode" [ "opaque" ]
      IfEnd
      # Double Sided render stats
      Sides 2
      # } End render stats
      IfBegin "!defined(user:_3dfm_filter_surface) || $user:_3dfm_filter_surface == 0"
        ReadArchive "indirectDiffuseDebug1 surface"
      IfEnd
      ObjectInstance "|nurbsSphere1|nurbsSphereShape1"
    AttributeEnd  # }


    AttributeBegin  # {
      Attribute "identifier" "string name" [ "|nurbsSphere2|nurbsSphereShape2" ]
      Attribute "user" "string delight_shortest_unique_name" [ "nurbsSphereShape2" ]
      Transform [ 1 0 0 0 0 1 0 0 0 0 1 0
          -2.8038202 0 0 1 ]
      # Start render stats {
      IfBegin "!defined(ShadowMapRendering)"
        # Casts Shadows render stats is on
        Attribute "visibility" "integer transmission" [ 1 ]
        Attribute "shade" "string transmissionhitmode" [ "opaque" ]
      IfEnd
      # Double Sided render stats
      Sides 2
      # } End render stats
      IfBegin "!defined(user:_3dfm_filter_surface) || $user:_3dfm_filter_surface == 0"
        ReadArchive "reflectionDebug1 surface"
      IfEnd
      ObjectInstance "|nurbsSphere2|nurbsSphereShape2"
    AttributeEnd  # }

    #
    # end geometry
  WorldEnd  # }

  # World output (for frame 1) in 0.01s
  #

FrameEnd  # }
# Frame 1 output in 0.01s
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# All RIB output completed in 0.1s
#

samhodge · 2009-02-24 21:53:59

So I want to know, if I am using the indirect diffuse call wrong

And if not why is the dark spot occuring on the indirect sphere

Also why are the values so bright

Thanks in Advance

Sam

samhodge · 2009-02-24 22:06:04

illustration

http://www.hodge.net.au/sam/blog/?p=72

Last edited by samhodge (2009-02-24 22:27:04)

olivier · 2009-02-25 08:45:43

The dark spot is a bug which I've just fixed.

The values are bright overall because of the units and the convolution involved. This is not a simple lookup.

Forums

#1 2009-02-24 21:51:50

indirectdiffuse as an method for convolving a map?

Code:

Code:

Code:

Code:

#2 2009-02-24 21:53:59

Re: indirectdiffuse as an method for convolving a map?

#3 2009-02-24 22:06:04

Re: indirectdiffuse as an method for convolving a map?

#4 2009-02-25 08:45:43

Re: indirectdiffuse as an method for convolving a map?

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