Module: RLSL::Prism::Builtins::SwizzleRules

Defined in:
lib/rlsl/prism/builtins/swizzle_rules.rb

Constant Summary collapse

SWIZZLE_COMPONENTS = 
{
  "x" => 0, "r" => 0, "s" => 0,
  "y" => 1, "g" => 1, "t" => 1,
  "z" => 2, "b" => 2, "p" => 2,
  "w" => 3, "a" => 3, "q" => 3
}.freeze
SINGLE_COMPONENT_FIELDS = 
%w[x y z w r g b a s t p q].freeze
SWIZZLE_PATTERNS = 
/\A[xyzwrgba]{2,4}\z/

Class Method Summary collapse

Class Method Details

.single_component_field?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rlsl/prism/builtins/swizzle_rules.rb', line 19

def single_component_field?(name)
  SINGLE_COMPONENT_FIELDS.include?(name.to_s)
end

.swizzle?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rlsl/prism/builtins/swizzle_rules.rb', line 23

def swizzle?(name)
  name.to_s.match?(SWIZZLE_PATTERNS)
end

.swizzle_type(components) ⇒ Object 



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# File 'lib/rlsl/prism/builtins/swizzle_rules.rb', line 27

def swizzle_type(components)
  case components.length
  when 2 then :vec2
  when 3 then :vec3
  when 4 then :vec4
  else :float
  end
end