How to do the attacking action in the game-Advanced tutorial

Transferred from: http://www.gamelook.com.cn/2015/05/214071

Gamelook reported/Before Gamelook released the "Simple Good game" attack action "3 tips" a lot of students welcome, today we on the basis of a previous article on the role of the game character Attack Action essence-body movement principle, I hope we can help you in future development work.

Today we from the joint and skeletal muscle movement , action and reaction Law , reaction action , rotational speed control , movement linkage principle , These 5 aspects to detail the character attack action production in the attention point.

From Bandai South Dream Palace Studio et Development Headquarters Animation Room animation division in Cedec 2013 of the lecture, content by Gamelook finishing:

1. Movement of joints and skeletal muscles

People do exercise by shrinking their muscles, and sometimes these movements can even reflect the character's feelings and personality traits. So, how realistic the muscle movement is, determines how natural and smooth the final character moves. Of course, this view applies not only to "people", but to all muscular animals.

In many people's eyes, joints are a key part of muscle movement. But in fact the joints are located at the bone and bone connections, each joint requires a minimum of 2 muscles to truly achieve movement , muscle movement to drive joints, adjust the speed. So the most important thing to note in character animation is not the bone, the key, but the movement of the muscles .

The nature of muscle movement

However, the muscles are contracted to achieve movement . We take the curved arm as an example, the muscle contraction in this action, the lateral muscle stretching. muscles do not stretch themselves, muscle stretching generally occurs in the condition of relaxation, external traction and so on.

With the movement of the muscles and the bending of more than 2 joints, we give the characters a variety of images. For example, the "C" type in the English alphabet usually gives the impression of being strong, cold and hostile. and the "S" type, it gives people a soft, flexible, confusing feeling. A muscular character appears vainly disobey in action, probably because of an S-shaped motion.

C-Type action show

S-type action show

2. Action and reaction laws

Action and reaction is a relative set of relations, used properly can let the character's movements to show a beautiful balance or full of power attacks. On the other hand, if there is no such rule, do not say the movement of the characters, even standing motionless to the feelings are very awkward.

To jump, for example, the force on the ground is a force, the ground to the person will have a reaction, "jumping" is actually through this reaction forces to achieve. It should be noted that the reaction force is the same size as the action, in the opposite direction.

So how do you use this rule in the game? Let's take a look at the following case. For example, the following right hand straight fist, the left hand quickly retract is for the "role", while the right hand uses its "reaction" quickly hit out. The right leg before kicking is the same, as for the body in front of the left hand back to produce a "role", use reaction forward forward. In the "action" and "reaction" of the law, the timing is very important, when the time-point stagger character action will appear unnatural .

Use case for action and reaction (straight line)

The principle of action and reaction in the rotation of the same application, such as a person sitting on the swivel chair to raise their hands and legs, hands in the case of maintaining the level of movement, this time the reaction will make the chair to the arm movement in the opposite direction, and the body stability is not high.

But if both hands do stretching and cross-motion, the reaction of the left hand and the reaction of the right hand will counteract each other, the chair will not rotate, and the stability of the body is higher. A pair of opposing forces is important to enable a character to achieve strong rotational motion in a stable state .

Action in the rotation action in the reaction

In the "left-handed backhand punch", in order to let the left hand hit the power greater, the right hand needs to be vigorously back. The most important thing in the attack of a rotating system is to do the opposite force of the attack to stabilize the body .

Rotating system Attack action (hands and feet)

And in the whole body rotation action, the ground reaction is also very important. When the character of the full-body rotation action, the ground will be counterproductive, if the character's knees, torso is a relaxed state, the force will not be able to smoothly transfer to the upper body. So in this type of action, the lower body, torso part of the muscle must not be relaxed.

Rotation system Attack Action (systemic)

3. Reaction action

This is actually gamelook in the last article, the action game in the role of jumping, hitting and other actions, the attack site will have a moving in the opposite direction of the preparation action. This gesture will make the character's attack more authentic, even if there is no real-life action can not give a clear sense of vainly disobey.

We still take "jumping" as an example, the upright standing posture can not get the reaction force generated by weight, people will not jump up, so people in the jump before all have a squat action. Squat in the moment the human body is in weightlessness, the body's own weight at this time will be on the ground force, the ground at the same time on the body to produce reaction, and then complete the jumping action.

The reaction action in jumping

In addition, the thigh muscles also release a lot of power in jumping movements. In the "squat" stage, the back of the thigh is contracted and the thigh is stretched on the front, at which point the thighs accumulate elastic energy, which is released after the legs are stretched, and the characters get a stronger jump force.

The use of the game is very similar to the one mentioned in the previous article, in the role of the attack before the action, adding a body to the opposite direction of the action of contraction. It is important to note that this reaction can only be performed before the attack is initiated, and that the time to increase the counter-action in real life (that is, the "charge time" in the game) does not increase strength.

Reaction action in the fight

After understanding the reaction action, we also need to know that a complete action will have multiple groups of muscle appearance and reaction relationship, for example, in the right hand of the above figure has at least 4 groups of action and reaction muscles, respectively:

Dorsal muscle-thoracic muscle

Thigh back muscles-thigh frontal muscles

Arm bending muscles-arm stretching muscles

Body right turn muscle-body left turn muscle

After the action of the muscle and reaction muscles are defined, the movements of the characters are also basically shaped.

4. Control the speed of rotation

The concept of "rotational speed" is also very important for "attack", and in addition to hand, foot, and body, there are sometimes weapons that rotate in action games.

For example, in the initial stage of rotation, the hands of the character are unfolded, but as the speed of rotation increases, the hands gradually tighten and eventually become a chest-hugging posture. A friend who knows a lot about figure skating may find it familiar, because the player in the aerial rotation of figure skating is also in this position.

Control of rotational speed

Simply explained, this is because the smaller the radius of the arm movement, the smaller the inertia force, and the easier it is to rotate.

Let's take a look at the specific use of this principle in the game, such as the right back kick, the foot is not opened directly after leaving the ground, but immediately put away (heel toward the buttocks). In this way, the rotation radius of the lumbar axis is reduced, and the rotational speed (kick speed) is further improved. When the speed of rotation reaches a certain level, the attacking position is expanded, and the attacking action of the character will be more daring.

Application of rotation in attack action

It is also important to note that when the role of the upper body rotation in the air attack, the lower part will be reversed because of counter-clockwise rotation, so that the stability of the physical decline, it is difficult to exert a strong attack. In this case, in order to exert a strong attack, generally stretching legs to increase the body's inertia force, so that the lower body is not prone to rotation, it is more stable.

A strong attack on the air

5. Chain of Action

The action chain principle, which is associated with all attack actions, is called kinetic chain in English. Only by being familiar with the action chain principle can your character get rid of the simple muscular contraction action.

We continue to take the right fist for example, this set of movements starts from the lower body, the left foot moves forward, and stops after the fixed position. At this time the face of the left side of the reaction, and because the left foot to stop the forward movement, the speed of the knee will rise, when the knee stopped after the waist speed, and then the chest, shoulder. Power and speed are constantly moving upward toward the attacking site with time and movement, eventually passing to the punch face of the character and attacking.

The chain of attack actions 1

The chain of attack actions 2

The chain of attack actions 3

There are two tricks in this chain of action, the first of which is the location center. In his speech, Yuanmei said that the strength of the lower body and torso was not enough, and the power of the final blow would fall.

The second trick is that the joints and muscles should be fixed at the right point in time. When the next part starts to accelerate, the first part must be able to support the middle of the reaction, so the other parts of the deceleration and stop are very necessary.

How to do the attacking action in the game-Advanced tutorial