Class: TinyGLTF::Accessor

Inherits:
Object
  • Object
show all
Includes:
Base
Defined in:
lib/tiny_gltf.rb,
ext/tiny_gltf/rb_tiny_gltf_init.c

Instance Attribute Summary

Attributes included from Base

#model

Instance Method Summary collapse

Methods included from Base

included, #inspect, #to_h, #to_json

Instance Method Details

#buffer_view ⇒ Object 



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# File 'lib/tiny_gltf.rb', line 172

def buffer_view
  model.buffer_views[buffer_view_index]
end

#byte_length ⇒ Object 



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# File 'lib/tiny_gltf.rb', line 157

def byte_length
  byte_stride * count
end

#byte_stride ⇒ Object 



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# File 'lib/tiny_gltf.rb', line 150

def byte_stride
  # stride in buffer view is optional, when 0 or omitted it's assumed to
  # be tightly packed, which == element_size
  stride = buffer_view.byte_stride
  stride && stride > 0 ? stride : element_size
end

#component_size ⇒ Object 



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# File 'lib/tiny_gltf.rb', line 123

def component_size
  case component_type
  when :byte,  :ubyte  then 1
  when :short, :ushort then 2
  when :int,   :uint   then 4
  when :float          then 4
  when :double         then 8
  else raise "Can't calculate component size for component type #{component_type.inspect}"
  end
end

#element_size ⇒ Object 



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# File 'lib/tiny_gltf.rb', line 146

def element_size
  component_size * num_components
end

#normalized? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/tiny_gltf.rb', line 168

def normalized?
  !!@normalized
end

#num_components ⇒ Object 



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# File 'lib/tiny_gltf.rb', line 134

def num_components
  case type
  when :scalar      then  1
  when :vec2        then  2
  when :vec3        then  3
  when :vec4, :mat2 then  4
  when :mat3        then  9
  when :mat4        then 16
  else raise "Can't calculate number of components for type #{type.inspect}"
  end
end

#to_ptr ⇒ Object 



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# File 'lib/tiny_gltf.rb', line 161

def to_ptr
  view_ptr = buffer_view.to_ptr
  length = byte_length
  length = view_ptr.size if length > view_ptr.size
  Fiddle::Pointer.new view_ptr + byte_offset, length
end