X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?p=CreaPhase.git;a=blobdiff_plain;f=octave_packages%2Fquaternion-2.0.0%2Fdoc-cache;fp=octave_packages%2Fquaternion-2.0.0%2Fdoc-cache;h=1f0e50a0f9af0b0028cd6f73d295510a2526c8f0;hp=0000000000000000000000000000000000000000;hb=c880e8788dfc484bf23ce13fa2787f2c6bca4863;hpb=1705066eceaaea976f010f669ce8e972f3734b05

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+# Created by Octave 3.6.1, Mon Apr 02 12:18:12 2012 UTC <root@t61>
+# name: cache
+# type: cell
+# rows: 3
+# columns: 5
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 5
+q2rot
+
+
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 814
+ -- Function File: [AXIS, ANGLE] = q2rot (Q)
+     Extract vector/angle form of a unit quaternion Q.
+
+     *Inputs*
+    Q
+          Unit quaternion describing the rotation.
+
+     *Outputs*
+    AXIS
+          Eigenaxis as a 3-d unit vector `[x, y, z]'.
+
+    ANGLE
+          Rotation angle in radians.  The positive direction is
+          determined by the right-hand rule applied to AXIS.
+
+     *Example*
+          octave:1> axis = [0, 0, 1]
+          axis =
+             0   0   1
+          octave:2> angle = pi/4
+          angle =  0.78540
+          octave:3> q = rot2q (axis, angle)
+          q = 0.9239 + 0i + 0j + 0.3827k
+          octave:4> [vv, th] = q2rot (q)
+          vv =
+             0   0   1
+          th =  0.78540
+          octave:5> theta = th*180/pi
+          theta =  45.000
+          octave:6>
+
+
+
+
+
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 49
+Extract vector/angle form of a unit quaternion Q.
+
+
+
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 2
+qi
+
+
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 355
+ @deftypefn {Function File} {} qi
+ Create x-component of a quaternion's vector part.
+
+ @example
+ q = w + x*qi + y*qj + z*qk
+ @end example
+
+ @strong{Example}
+ @example
+ @group
+ octave:1> q1 = quaternion (1, 2, 3, 4)
+ q1 = 1 + 2i + 3j + 4k
+ octave:2> q2 = 1 + 2*qi + 3*qj + 4*qk
+ q2 = 1 + 2i + 3j + 4k
+ octave:3> 
+ @end group
+ @end example
+
+ @end deftypefn
+
+
+
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 80
+ @deftypefn {Function File} {} qi
+ Create x-component of a quaternion's vector p
+
+
+
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 2
+qj
+
+
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 355
+ @deftypefn {Function File} {} qj
+ Create y-component of a quaternion's vector part.
+
+ @example
+ q = w + x*qi + y*qj + z*qk
+ @end example
+
+ @strong{Example}
+ @example
+ @group
+ octave:1> q1 = quaternion (1, 2, 3, 4)
+ q1 = 1 + 2i + 3j + 4k
+ octave:2> q2 = 1 + 2*qi + 3*qj + 4*qk
+ q2 = 1 + 2i + 3j + 4k
+ octave:3> 
+ @end group
+ @end example
+
+ @end deftypefn
+
+
+
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 80
+ @deftypefn {Function File} {} qj
+ Create y-component of a quaternion's vector p
+
+
+
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 2
+qk
+
+
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 355
+ @deftypefn {Function File} {} qk
+ Create z-component of a quaternion's vector part.
+
+ @example
+ q = w + x*qi + y*qj + z*qk
+ @end example
+
+ @strong{Example}
+ @example
+ @group
+ octave:1> q1 = quaternion (1, 2, 3, 4)
+ q1 = 1 + 2i + 3j + 4k
+ octave:2> q2 = 1 + 2*qi + 3*qj + 4*qk
+ q2 = 1 + 2i + 3j + 4k
+ octave:3> 
+ @end group
+ @end example
+
+ @end deftypefn
+
+
+
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 80
+ @deftypefn {Function File} {} qk
+ Create z-component of a quaternion's vector p
+
+
+
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 5
+rot2q
+
+
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 1058
+ -- Function File: Q = rot2q (AXIS, ANGLE)
+     Create unit quaternion Q which describes a rotation of ANGLE
+     radians about the vector AXIS.  This function uses the active
+     convention where the vector AXIS is rotated by ANGLE radians.  If
+     the coordinate frame should be rotated by ANGLE radians, also
+     called the passive convention, this is equivalent to rotating the
+     AXIS by -ANGLE radians.
+
+     *Inputs*
+    AXIS
+          Vector `[x, y, z]' describing the axis of rotation.
+
+    ANGLE
+          Rotation angle in radians.  The positive direction is
+          determined by the right-hand rule applied to AXIS.
+
+     *Outputs*
+    Q
+          Unit quaternion describing the rotation.
+
+     *Example*
+          octave:1> axis = [0, 0, 1];
+          octave:2> angle = pi/4;
+          octave:3> q = rot2q (axis, angle)
+          q = 0.9239 + 0i + 0j + 0.3827k
+          octave:4> v = quaternion (1, 1, 0)
+          v = 0 + 1i + 1j + 0k
+          octave:5> vr = q * v * conj (q)
+          vr = 0 + 0i + 1.414j + 0k
+          octave:6>
+
+
+
+
+
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: 80
+Create unit quaternion Q which describes a rotation of ANGLE radians
+about the v
+
+
+
+
+