How To Draw Gravity And Magnetic Profiles

This is our final session working with the basic structure of the torso before we start clothing it in mankind. Nosotros take seen how it is proportioned and how those proportions vary within limits; now nosotros'll see how it counters gravity with posture – and how far posture can be pushed before it falls over (or, on paper, looks out of balance).

Balance: How to Stand (and Autumn)

The body's Center of Gravity (CoG) is roughly behind the belly push. The trunk is supported past whatever part touches the ground: mostly both anxiety, only information technology can exist i human foot, both anxiety and i paw, 2 hands, etc. The Center of Back up (CoS) is the mid-point between those points of contact with the basis, whether it'south a single point, or they form a line, a triangle or a foursquare.

The alignment of CoG and CoS determines residue, both in existent life and on paper, and this operates differently depending on whether the body is all the same or in move.

Residual in Stillness

Flick a vertical line shooting upwardly from the CoS. The trunk is balanced if the line runs through the CoG. Recall of it as balancing two cans on top of each other. They can simply be slightly unaligned earlier the acme one falls over.

Even if the trunk is holding a puzzling stance, nigh of the time you'll discover that the CoG is yet aligned with the CoS, holding it all together.

It is very difficult to agree an unaligned position like the one beneath for more than a few seconds. The alignment must exist reestablished, either by moving the CoG back in line, or by moving i human foot to re-position the CoS – otherwise a fall is inevitable.

More on the Eye of Support

At this point I must explain that my original definition of the middle of support, as mid-point between points of contact, was actually a simplification: locating it is not always such simple math, but actually requires some observation and intuition, every bit points of contact with the basis don't necessarily bear the aforementioned amount of weight! The heart of support is closer to the side that carries the most weight, proportionately to how much weight information technology carries. Classic example: when you're continuing around, you may find yourself putting all your weight on merely 1 leg (left, beneath). Find, when you exercise this, how your body is positioned over that leg, and how its motion back to the center if y'all distribute your weight equally between both legs once more (right, below).

We probably spend more time distributing our weight unequally than we practice equally, and we perceive this equally more natural: the best effigy artists are those who capture this counterbalanced-imbalance and thereby draw relaxed-looking characters, whereas someone who applies the constabulary of rest mathematically ends upwardly with potent, unnatural and above all non-dynamic looking characters.

Below is an illustration of this dynamism: the character on the left stopped mid-stride, when she had transferred her weight to her front foot and was well-nigh to lift the rear foot, which as a consequence carries trivial weight despite touching the ground. Her CoS is therefore close to her front end pes. Reading-wise, information technology is considering most of her weight is conspicuously on her front leg that nosotros can tell she's stopped in motion, as opposed to what is shown in the medallion. The figure on the right shows a CoG that's only slightly off-center, just this subtle visual clue in an otherwise symmetrical stance informs u.s.a. that the weight is shifted slightly to the left leg, saving the effigy from looking like a diagram in a martial arts text book.

An additional "complexity" is the musculus gene – countering gravity with strength–, which is why specially trained people amaze u.s.a. with stances that should be impossible. However, while in real life nosotros can sentry crazy feats and have no choice but to believe what we run into, they can fall rather flat on paper and look like the cartoon is off. It's important for an artist to learn to draw what looks correct, rather than what is right simply looks odd. The gravity-defying postures beneath are all genuine, but can y'all accept them equally such without seeing actual photos?

That said, the muscle factor comes into play in less extreme means all the time. For instance, the figures below are carrying the same weight. The taller one, having plenty of muscular mass, tin can carry it at arm's length fifty-fifty though this shifts the body's CoG. He has enough muscular power for that not to affect him. The smaller figure would topple right over, and so he has to hold the weight close and lean backwards to preserve the original CoG every bit much as possible.

This sounds complicated when described, merely nosotros do this all the time without thinking about it, and once again, the ability to internalize or feel what you're cartoon makes it easier to put it on paper without having to calculate the positioning of various centers!

Residue in Motion

For a trunk in motion, we look at things differently. Imbalance is the motor of any motion, in fact you could say motion is a controlled loss of balance. And so for this nosotros are going to set aside these ii centers as less relevant, only bearing in mind that the further a stance is from the idea of balance described higher up, the faster, more than dynamic, more dramatic the movement it expresses. The following are pointers for kinds of motion that often come up in illustration.

Running or Moving Forrad

The faster nosotros run, the more we bend forward. The rule here is that, at its fullest extension, the front human foot must hit the ground in alignment with the head (or close). If the head is mode alee of the legs, this is an uncontrolled run that can but cease apartment on its face up!

Moving Backward

Contrary to moving forward, the body leans astern, at least if nosotros're trying to move faster than a walk. Nevertheless in that location is very lilliputian range here. The heel needs to hit the ground in alignment with the back-leaning upper body, and if you lot try you'll see yous can only take a very short pace back this fashion without stopping the motion altogether.

Throwing

Whether you lot're throwing an object or a punch, the movement is the aforementioned and it is invariably followed by stepping forwards with the leg opposite the arm used to throw. This is the natural, unconscious reaction to stop the body from toppling forrard following a powerful throw. Martial artists and similar trained athletes sometimes step forward with the same-side leg, but behave in heed this is a trained and conscious movement, not something you lot'd run across in a bar brawl and such. Here's a trick to brand your throwing look more dynamic, or captured in the heat of action: describe it as the foot steps forward simply before it actually hits the ground, every bit that (as shown hither) captures the end of the motility.

Receiving

When catching something, blocking a punch, or dodging, nosotros have a pace back to lessen the affect of the coming forcefulness – or because the bear upon forced the states to. Only a trained fighter would step forward while blocking, it is completely unnatural. Note that this is a movement we exercise not want to wait fluid or dynamic.

Jumping vs. Falling

This one's a bit obvious, but the difference between jumping (controlled, volition country well) and falling (uncontrolled, will end in pain) can be subtle, every bit in the superlative row. The first pose feels like a jump with a proper landing coming upwardly. This is because the feet are suitably placed nether the CoG to reach a balanced alignment upon landing. The second pose is the exact aforementioned but I rotated it slightly so the feet can no longer catch the CoG. What a difference! It no longer looks controlled at all. The last two are fifty-fifty worse and even more expressive of a disarrayed fall.

Kicking

Below are 3 distinct kicks: a "natural" or untrained one, a football kick, and a martial arts kick.

When someone randomly kicks something, the natural reaction is to lean back to oppose the force of the kick, and and so remain standing. This creates a high chance of falling on i's bottom if the kick is likewise strong, or the footing non business firm enough! But this is what nosotros all practise innately, and information technology is quite impossible, afterward such a kicking, to movement in any direction without first bringing the raised pes back to the footing to regain full balance.

The football game kick sketched here, while non the just variety by whatsoever means, is distinctly designed for the thespian to not lose balance despite its power, and to exist able to continue running without a moment'southward pause. You can meet it in the forward curve of the body and the swing of the arms to remainder it; when that foot returns to the ground the whole body will already be in a running posture. The martial art side kick shows similar command, with a slight deliberate imbalance: you can see from the forward position of the CoG that the trunk is pressing forward. This fighter is counting on the bear on with his target to cease what would otherwise be a fall, and putting all his body weight into the kick to give it its power. Do note that this abandon is reserved either for an inert target (sandbag) or an easy opponent; when sparring with a skilled opponent, he would take much more care not to push all his weight forward, as a dodge or catch from the other would sweep him off his supporting foot altogether.

Practise Time

Observe people, and photos capturing athletes in motion, with the to a higher place notions in mind. To preserve them in your mental library, sketch additional details you may notice in the trunk.
Practise sketching people in diverse still postures without reference. Do they experience balanced? If not, locate your two centers and check their alignment.
Trace the basic construction over some photos of athletes in motion. Y'all'll detect the result actually lacks dynamism, which is inevitable when tracing from photos. But basing yourself on these, redraw the postures while exaggerating the motility to brand them properly expressive.