class SFML::TransformableObject

Standalone transformable — a pure CSFML transform container (no geometry attached). Useful as a base for custom drawables that combine a transform with their own rendering: parent the child’s vertices to this object’s transform and you get position / rotation / scale / origin for free.

Most users want the Graphics::Transformable mixin instead — this standalone class exists for symmetry with the C++ API.

t = SFML::TransformableObject.new(position: [400, 300], rotation: 45) t.transform #=> SFML::C::Graphics::Transform (use via RenderStates)

Constants

CSFML_PREFIX

Public Class Methods

new (**opts)

Source

# File lib/sfml/graphics/transformable_object.rb, line 17
def initialize(**opts)
  ptr = C::Graphics.sfTransformable_create
  raise GraphicsError, "sfTransformable_create returned NULL" if ptr.null?
  @handle = FFI::AutoPointer.new(ptr, C::Graphics.method(:sfTransformable_destroy))

  self.position = opts[:position] if opts.key?(:position)
  self.origin   = opts[:origin]   if opts.key?(:origin)
  self.rotation = opts[:rotation] if opts.key?(:rotation)
  self.scale    = opts[:scale]    if opts.key?(:scale)
end

Public Instance Methods

clone ()

Alias for: dup

dup ()

Source

# File lib/sfml/graphics/transformable_object.rb, line 39
def dup
  ptr = C::Graphics.sfTransformable_copy(@handle)
  raise GraphicsError, "sfTransformable_copy returned NULL" if ptr.null?
  copy = self.class.allocate
  copy.instance_variable_set(:@handle,
    FFI::AutoPointer.new(ptr, C::Graphics.method(:sfTransformable_destroy)))
  copy
end

Returns the dup.

Also aliased as: clone

inverse_transform ()

Source

# File lib/sfml/graphics/transformable_object.rb, line 34
def inverse_transform
  C::Graphics.sfTransformable_getInverseTransform(@handle)
end

Returns the inverse transform.

transform ()

Source

# File lib/sfml/graphics/transformable_object.rb, line 29
def transform
  C::Graphics.sfTransformable_getTransform(@handle)
end

Returns the transform.