Kinematics is the branch of mechanics that studies the motion of a body or a system without consideration given to its masses or the forces acting on it, or the study of the positions, angles, velocities, and accelerations of body segments and joints during motion. In kinematic studies of the body, there are specifically defined parts. Profiles, involve the contours of the body, or the most exterior and visible character of movement. Skeletal Vectors, or rigid portions of the body, being the arm, forearm, or leg for example. Joints between adjacent segments explain the range of motion within the kinematics as control points. Lastly, but often the first laid out in a the study is a Construction Framework, or all of the guidelines and primitive shapes required to generate a more complex construction.

It seems easy at first to diagram a bone and a joint, but to develop this three-dimensional motion as a 2d representation is a highly complex lattice of motion, trajectory, and rotation. Movement in space, and movement in elevation are two completely different images. Think of the iconic photos of Edweard Muybridge, without digital post process at his disposal, he placed his subject in front of a datum. These photos are a perfect representation of linear movement. Across a plane and along one axis, these movements seem to move parallel to a flat surface. However, there is movement along several axes in this image. You can image there is movement along the axis running towards us – the woman’s gait causes her to sway from side to side. These sub-motions are critical to understanding the whole kinematic diagram.

Theoretically, we can talk about these general movements as a difference in kind and a difference in degree. Mapping the variety of movements in your images will become a quantitative analysis of difference in kind and in degree. Think of making a fist, each finger moves in the same motion, this would be an example of a difference in degree. As the skeletal vectors and joints are similar, they only differ in degree, such as distance. While the closing motion of the thumb in this instance is a difference in kind – it is making an entirely different movement. Yet while they are all fingers, they do not all act the same in principle.
Another example to consider is Gilles Deleuze's of the racehorse being more closely related to the greyhound than a draft horse. While both of the same species, their functions are completely different. The draft horse, using this model, is more closely related to the oxen. Consider this philosophy when attempting to dissect your images. You will find many similarities in motion, but determine which are similar in kind and those which act only the same in degree.

Rhino will help us to define these mechanic characteristics using primitives - consider primitives as simplistic geometry. In the same way that we learned that Illustrator acts intelligently, such that it knows the image as a 1:1 projection and that the geometric values and equations are embedded within the ‘shapes’ you draw. Rhino acts in the same way. This is not an exercise in tracing…you are NOT to place your photographs as backgrounds in Rhinoceros. Instead, you will need to build a series of construction lines for each image to set up all of the reference information needed to build the 3 remaining conditions:
Skeletal Vectors –lines that notate the internal structure / rigging that supports the movement
Profiles – contour information of the body part / body parts being explored
Range of Motion – the degrees of flexibility dictated by the type of joint / joints
Start with the skeletal vectors first, notating the vectors present. Then move onto the profile information, using primitive shapes as the basis for your profiles. This is also not an exercise in reduction. Turning the profiles of your body parts into a series of iconographic or symbolic traces is strictly forbidden. Your goal is to notate the qualitative conditions of the profiles through primitive shapes. This IS a multi-week assignment that will require patience and concentration in order to be completed successfully. Predetermining the results in your head and trying to tackle too much information at one time will cause you to miss critical information. For Tuesday, you must set up the framework and drawings for at least 2 images.
Submission: One 11x17 progress file, generated in Rhinoceros, composed in Illustrator, saved in .PDF format. You will need to post process the line work in Illustrator to emphasize information you find critical in your study. Use lineweight and linetype to notate these conditions. You may uses shades of gray to assign values to your lines, but may NOT use color. Again, use the filing nomenclature: for student BobSmith, “A05_Smith_B.pdf.” All .pdf files are due in your backpack by 12:00 PM on Tuesday 18 March. Late work will not be accepted.