#X3D V3.0 utf8
PROFILE Interchange
COMPONENT Texturing:2
COMPONENT Text:1

# MultiTexture with separate modes and sources for RGB/alpha.
# Expected result:
# - On RGB: we subtract "pattern texture - squirrel texture".
# - On Alpha: we set constant alpha (ignoring alpha from textures
#   and alpha from material).
#   We set alpha = 0.6 and you should see a red box behind the quad.

Shape {
  appearance Appearance {
    texture MultiTexture {
      mode [
        # Note that it doesn't matter what 1st texture unit does with alpha
        # channel, because 2nd alpha channel will just replace it (SELECTARG2).
        "REPLACE"
        "SUBTRACT / SELECTARG2"
      ]
      source [
        ""           # equivalent to "DIFFUSE" or "DIFFUSE / DIFFUSE"
        " / FACTOR"  # equivalent to "DIFFUSE / FACTOR"
      ]

      # This is the actual alpha (opacity) of the expected result.
      # Changing this *has* an effect (how much transparent is the quad).
      alpha 0.6

      # This color is unused. You should *not* see anything blue
      # in the result, and changing this color has no effect.
      # Although "source" field uses "FACTOR", but it's only used for alpha channel.
      color 0 0 1

      texture [
        ImageTexture { url "data/pattern.png" }
        ImageTexture { url "data/squirrel.png" }
      ]
    }
    material Material {
      # Use some non-trivial transparency value, to use blending.
      # The actual transparency value given here will be ignored
      # (multitexturing above says to use MultiTexture.alpha).
      transparency 0.1
    }
  }
  geometry IndexedFaceSet {
    coord Coordinate { point [ 0 0 0, 1 0 0, 1 1 0, 0 1 0 ] }
    coordIndex [ 0 1 2 3 ]
    texCoord TextureCoordinate {
      point [ 0 0, 1 0, 1 1, 0 1, 0 0, 1 0, 1 1, 0 1, ]
    }
    solid FALSE
  }
}

Transform {
  translation 0.5 0.5 -2
  children Shape {
    appearance Appearance {
      material Material { diffuseColor 1 0 0 }
    }
    geometry Box { size 0.5 0.5 0.5 }
  }
}

# Viewpoint ------------------------------------------------------------------

# Camera settings "encoded" in the VRML/X3D declaration below :
# direction 0 0 -1
# up 0 1 0
# gravityUp 0 1 0
Viewpoint {
  position 0.5 0.5 1.4520823955535889
  orientation 0 0 1 0
}