A phenomenon known as Sundeep Effect occurs when a body rotates about a fixed axis, but all the points in the body have the same amount of rotation. This effect is usually referred to as a twist.
The twist typically occurs at the waist, where rotation occurs most rapidly. This is because at this angle, there are more degrees to rotate!
It is similar to the teardrop shape that happens when people sit in one position for a long period of time, except this happens faster. It can occur with both living and nonliving bodies.
Rigidbodies are not supposed to have this effect, so most manufacturers do not market them for it. However, it can cause cosmetic issues such as shift or breakage if not accounted for.
This article will talk about some signs and tips for how to prevent or fix twistage.
When a body rotates about an axis, the points in the body have the same velocity. This is called vector velocity.
A body in water has a different velocity than a rock. The rock appears to move faster because it is more fluid and it sticks out more from the water.
When a body rotates about an axis, the points in the body have the same velocity. This is called vector motion. When this happens, there are two things that may happen.
The feet may either leave the floor or they may stay on top of the ground. Both options are valid because there is no change in velocity! The feet or feet leave or stay off of the ground depends on which side they rotate on!
There are two ways to improve vector motion: use lighter weights or use stronger bones.
When a body rotates about an axis, the body has the same amount of displacement at all points in the body. This phenomenon is called goaltender effect.
In a rotation about an axis, the apparent position of a body item can be varied by moving the item relative to other items. Thus, when a circular disk is rotated about its center line, it can be rotated about several others lines as it changes in size as it moves.
The linear motion of the disk is what transfers into a rotation about an axis. When this occurs, all of the points in the disk have the same amount of displacement around their center line. This effect is similar to having one person rotate around an axis and having all of the points in the body have the same amount of displacement around them.
Rigid body rotation
When a body rotates about a fixed axis, the body has the same amount of rotation for all of its points. This is referred to as non-rotational equilibrium.
A non-rotational equilibrium condition refers to a state in which something else cannot change or move without being altered in some way by something else. In this case, the something else is the axis on which the body rotates.
Non-rotation occurs when an axis is placed on a rock and thrown against a wall, for example. The wall does not change in size because of the rock’s effect on it.
When bodies do not have any points that are individually stable, this phenomenon occurs as noneffeilibrium.
Fixed axis of rotation
When a body rotates about an axis, the points in the body have the same angle to the axis. This is referred to as a parallel axis body.
The major difference between a rotating body and a fixed-axis body is that the rotating body has more degrees of rotation, and thus offset sides, than when it was at its initial position.
This article will discuss how to create a parallel-axis body that has no discernable roundness or slope, which cannot be achieved in an axial-body style. The only way to add thickness or solidity is by having more volume in the shape.
This article will also discuss how to create a fluid-looking volume unit, where shape changes quickly. This is important for showy shapes, so they do not seem fake or thin.
Point mass model for a rigid body
In order for a body to have the same point mass as a fluid body, the points in the body must be equal in size. This is referred to as point mass model for a rigid body.
In order for a fluid body to have the same point mass model as a rigid body, the densities of its particles must be equal. This is referred either through pressure or surface area.
Since rigid bodies can only have one pressure and one surface area at a time, this means that when it rotates, it must gain or lose some of these areas.
When pointing with your finger toward northeast, there is an increase in north and south pressure on that finger due to the movement of the rigidbody earth around its axis. There is also an increase in east and west pressure due to motion of the pointing finger.
Sum of moment of inertia for point mass model
When a body rotates about a fixed axis, the points in the body have a similar moment of inertia. This is referred to as the sum of the moment of inertia.
The principle behind this principle is that when two bodies with different masses collide, they will align their rotation vectors. Since these two bodies have similar moments of inertia, they will align their rotation vectors. This applies to planes, spacial materials, and even clothing!
This principle can be applied in modeling as well. When creating a new model concept or going from wireframe to 3D model, you should do the following: take a look at the sum of the moment of inertia, take some measurements yourself to make sure it is accurate, and compare it to your final model.
Rotating reference frame
When a body rotates about an axis, the points in the body have the same angle to the axis. This phenomenon is called constant reference frame.
A body in space is like a point on a circle, and a rotating reference frame is like an edge of a circle. When the body rotates, its points move across the circle in different directions, but it stays at one distance from it.
The principle is that when something changes, your brain calculates that change as soon as it arrives. When you move your head when someone speaks, you feel that person is closer to you because you perceive movement of your head and speech coming closer to you.
To experience this effect, it is important that the body in question has a constant reference frame.
True center of gravity
When a body rotates about an axis, the points in the body have the same circumference. This is referred to as true center of gravity (CCG).
In contrast, a body with no axis or a nonuniform circumference has variable CCG. The variable CCG is due to the fact that some points in the body have greater extent of rotation than others.
When training at extremes of scale, it is important to find the perfect point where the body perfectly rotates on its axis. This point is called the true maximum extent of rotation (METROS).