KhronosGroup/glTF

Question about Accessor's Min-Max bounds with normalized data.

vpenades opened this issue · 1 comments

vpenades commented

Lets say I have an array of bytes and an accessor that has the normalization flag enabled, so the byte values are scaled to values between 0 and 1.

In that scenario, if the accessor has min-max bounds defined, should the values be set

  • Between 0 and 255 as per the accessor's input?
  • Between 0 and 1 as per the accessor's output?

Right now gltf-validator seems to be checking the bounds as per the accessor's input, that is, 0 and 255. Is that correct?

lexaknyazev commented

Here's the spec language for min/max: https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#_accessor_max

normalized property has no effect on array values: they always correspond to the actual values stored in the buffer.

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