Class: Assimp::Quaternion

Inherits:
FFI::Struct
  • Object
show all
Extended by:
StructAccessors
Defined in:
lib/assimp/quaternion.rb

Instance Method Summary collapse

Methods included from StructAccessors

extended, has_ref?, struct_array_attr_accessor, struct_array_attr_checker, struct_array_attr_reader, struct_array_attr_writer, struct_attr_accessor, struct_attr_reader, struct_attr_writer, struct_ref_array_attr_accessor, struct_ref_array_attr_reader, struct_ref_array_attr_writer

Instance Method Details

#*(other) ⇒ Object 



24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/assimp/quaternion.rb', line 24

def *(other)
  if other.kind_of?(Quaternion)
    q = Quaternion::new
    q.w = w*other.w - x*other.x - y*other.y - z*other.z
    q.x = w*other.x + x*other.w + y*other.z - z*other.y
    q.y = w*other.y + y*other.w + z*other.x - x*other.z
    q.z = w*other.z + z*other.w + x*other.y - y*other.x
    q
  elsif other.kind_of?(Vector3D)
    v = Vector3D::new
    q2 = Quaternion::new
    q2.x = other.x
    q2.y = other.y
    q2.z = other.z
    r = self * q2 * conjugate
    v.set(r.x, r.y, r.z)
  else
    raise "Unsupported operand: #{other.inspect}!"
  end
end

#conjugate ⇒ Object 



15
16
17
18
19
20
21
22
 
# File 'lib/assimp/quaternion.rb', line 15

def conjugate
  q = Quaternion::new
  q.w = w
  q.x = -x
  q.y = -y
  q.z = -z
  q
end

#to_s ⇒ Object 



11
12
13
 
# File 'lib/assimp/quaternion.rb', line 11

def to_s
  "{#{w}, #{x}, #{y}, #{z}}"
end