Skip to content

Latest commit

 

History

History
75 lines (62 loc) · 2.83 KB

recette.md

File metadata and controls

75 lines (62 loc) · 2.83 KB

STEPS TO CREATE IK FK SYSTEM

  1. Create a joint chain img_1.png

  2. Orient the axis of the joint chain in the correct direction with respect to the rotation order img_2.png

  3. Rename the joint chain correctly eg: joint_JNT
    img_3.png

  4. Duplicate the joint chain twice and rename the first joint chain by adding a suffix IK img_4.png

  5. Rename the second joint chain by adding a suffix FK
    img_5.png

  6. Following the joints in the caption, select arm_IK_JNT, arm_FK_JNT then arm_JNT respectfully, apply a parent_constraint img_6.png

  7. Repeat step 6 for forearm_IK_JNT, forearm_FK_JNT forearm_JNT and wrist_IK_JNT, wrist_FK_JNT, wrist_JNT. You should have your constraints create on the main joint chain img_9.png

  8. the constraint has the weighting of the 2 joints IK and FK img_7.png img_10.png

  9. FK Control rig creation Create a curve to represent the FK control rig Create a nurbs circle curve for each joint on the FK joint chain respectively: control rig | joint arm_FK_CTRL | arm_FK_JNT forearm_FK_CTRL| forearm_FK_JNT wrist_FK_CTRL | wrist__FK_JNT

  10. Control rig workflow To have a control rig that functions properly, the orientations of the nurbs curve has to match the orientation of the joint it is going to control, to achieve this we need to:

  • Choose the initial orientation you want for the nurbs curve
  • Select the nurbs curve then the joint and press P to parent the curve to the joint,
  • img_12.png
  • Freeze the transform of the control curve, this will give the transform of the joints to the control curve
  • unparent the control curve from the joint
  • Select the control curve then joint and apply a parent constraint wih the following settings for the parent constraint
  • img_11.png

Control rig organization We need to arrange the control curve properly in the outliner, but before doing so the transforms has to be neutralized to zero.

  • create an empty group and give it the name of the joint with the suffix "offset" img_13.png
  • parent this new group to the control curve
  • change the transform of the pivot of the group to match the control curve
  • and apply a freeze transform
  • unparent the group from the control curve and parent the control curve to the group
  • this should set the transforms of the control curve to 0.

img_14.png

  1. IK Control rig creation
  2. Create an ik handle with rotate plane solver by selecting arm_IK_JNT and wrist_IK_JNT img_15.png
  3. Create a curve to represent the IK control rig
  5. select the Ik control curve then the ik handle and apply a point constraint

Creating the IK FK Blend

  1. select the control curve that will have the attribute img_16.png img_17.png