Class: Rgltf::Extensions::KHRTextureTransform

Inherits:
Rgltf::Extension show all
Defined in:
lib/rgltf/extensions/khr_texture_transform.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Rgltf::Extension

decode_primitive, register, serialize_properties

Constructor Details

#initialize(json) ⇒ KHRTextureTransform

Returns a new instance of KHRTextureTransform.



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# File 'lib/rgltf/extensions/khr_texture_transform.rb', line 8

def initialize(json)
  @offset = json.fetch('offset', [0.0, 0.0]).freeze
  @rotation = json.fetch('rotation', 0.0)
  @scale = json.fetch('scale', [1.0, 1.0]).freeze
  @tex_coord = json['texCoord']
end

Instance Attribute Details

#offset ⇒ Object (readonly)

Returns the value of attribute offset.



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# File 'lib/rgltf/extensions/khr_texture_transform.rb', line 6

def offset
  @offset
end

#rotation ⇒ Object (readonly)

Returns the value of attribute rotation.



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# File 'lib/rgltf/extensions/khr_texture_transform.rb', line 6

def rotation
  @rotation
end

#scale ⇒ Object (readonly)

Returns the value of attribute scale.



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# File 'lib/rgltf/extensions/khr_texture_transform.rb', line 6

def scale
  @scale
end

#tex_coord ⇒ Object (readonly)

Returns the value of attribute tex_coord.



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# File 'lib/rgltf/extensions/khr_texture_transform.rb', line 6

def tex_coord
  @tex_coord
end

Class Method Details

.parse(json, owner:, doc:) ⇒ Object 



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# File 'lib/rgltf/extensions/khr_texture_transform.rb', line 25

def self.parse(json, owner:, doc:)
  new(json)
end

.serialize(object, doc:) ⇒ Object 



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# File 'lib/rgltf/extensions/khr_texture_transform.rb', line 29

def self.serialize(object, doc:)
  value = {}.tap do |json|
    json['offset'] = object.offset unless object.offset == [0.0, 0.0]
    json['rotation'] = object.rotation unless object.rotation == 0.0
    json['scale'] = object.scale unless object.scale == [1.0, 1.0]
    json['texCoord'] = object.tex_coord unless object.tex_coord.nil?
  end
  serialize_properties(value, handled_keys: %w[offset rotation scale texCoord])
end

Instance Method Details

#uv_matrix ⇒ Object 



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# File 'lib/rgltf/extensions/khr_texture_transform.rb', line 15

def uv_matrix
  cosine = Math.cos(rotation)
  sine = Math.sin(rotation)
  [
    cosine * scale[0], sine * scale[0], 0.0,
    -sine * scale[1], cosine * scale[1], 0.0,
    offset[0], offset[1], 1.0
  ].freeze
end