Juice Box Polish:

1. More obvious stretching and squeezing, the strong contrast of poses makes the juice box look more vivid.
2. When the juice box jumps, pay attention to the timing and spacing to achieve a better sense of suspension.
3. Pay attention to the movement trajectory, the beauty of the arc shape.
4. Introduce more detailed variations.

Golden Pose:

Animating:

Feedback:

https://syncsketch.com/sketch/xJneLMUrthq3

Fix

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https://syncsketch.com/sketch/udqguLMcYX3B

Acting in Animation

• Animation needs creativity.
• The character must have a goal or desire in the scene. Good acting shows what the character wants and what’s stopping them.
• Every movement should reflect the character’s unique personality… and their relationship to the situation.
• Let your animation breath.

Key:

• Clear pose
• Interesting timing
• Staging

Golden Pose

Regret Pose

• Look for more real-life action references .
• pay attention to the details of the hand movements.

Juice Box

• Anticipation is a mechanical build up for force.
• It’s important to understand now that all movement is created by forces, either external or internal. Anticipation is the most natural way to build up internal force in order to execute dynamic motion.
• Bill Tytla, legendary animator, says “Any animation consists
  of anticipation, action, and reaction.”
• “An object in motion will remain in motion unless acted on
  by an unbalanced force.”
• This Law applies to everything in the universe, including us.
  It’s precisely because of this law that anticipating left before
  walking right results in a conservation of energy

• anticipation is the key to describing how much strength and force go into a movement, while squash and stretch is the key to selling the physical believability of an action.

1.0 Tail

Planning:

1. Study the form of tail energy accumulation.
2. Draw the key pose.
3. Add intermediate frames.
4. Note the S shape.

Feedback:

https://syncsketch.com/sketch/waKQdcesXTDC

Time Chart

A time chart (or timing chart) in animation is a planning chart that illustrates the timing, spacing, and placement of drawings between key poses to create well-timed movement. It serves as a roadmap showing how many frames to draw between keyframes, how to space them for different speeds, and the overall flow of action.

Timing and Spacing

• TIMING is the speed and the rhythm of your animation, how many frames you use to make a movement.
• SPACING is the variation of the speed during this movement.

Weight

• Lost weight: hair or body parts rise.
• Gain weight: hair or body parts sink.

	Light	Heavy
Posture range	narrow	wide
Distance between object and body	far	close

Golden Pose

1.0 Pendulum

• Follow Through: This type of overlapping action is generated by external forces like weight, wind, gravity etc. Follow through can be applied to loose extremities such as: hair, cloth, ears, tails etc. At its core, follow through can be animated after the primary animation is done. As the primary animation drives how these extremities will “follow through” the movement. Follow through obeys the key concepts of successive breaking of joints, drag and lead and follow.
• Successive Breaking of Joints: In the pendulum example with multiple sections, each section would be affected “successively” (one after the other) down the chain of events starting from the point where the pendulum connects to the base down through the tip. One section would lead as the subsequent sections would follow afterwards slightly delayed. This would give the feeling of overlapping action. This is what happens in the world around us is all “non-mechanical” movement.
• Drag (wave principle): Drag plays an essential part in how an object “overlaps.” If the base of a pendulum leads, each preceding section will “drag” being then catch up to the movement.
• Lead and Follow: One object leads as it pulls the other behind it. If there are more sections preceding the primary force, those sections will be followed successively down the chain from the top down to the tip.

Step 1: Planning

1. Design the motion trajectory to a curve.
2. Draw the keyframes.
3. Draw the swaying angles.

Step 2: Animating

1. Set keyframes for the movement of the main model.
2. When the pendulum moves to the left, the tail points to the right. And when it moves to the right, the tail points to the left.
3. When the pendulum stops, the angle of its swing gradually decreases.

2.0 Pendulum

Note:

Note that each segment of the tail id driven by the previous segment, and the movement of the next segment is delayed compared to the previous one.

Feedback:

https://syncsketch.com/sketch/horuWrdMes29

1.0 Happy Pose Challenge

• In 3D animation production, “golden pose” refers to the action posture used to tell the story, and it is also known as a key pose.
• It is the most crucial pose in an animation sequence, capable of conveying the emotions, feelings and key information of the entire scene and shot. It is a single-frame pose that can be easily remembered by the audience. Animators usually first determine these golden poses, and then add intermediate frames and other details to refine the animation movements. The quality of the golden poses directly affects the emotional expression and aesthetic presentation of the animation performance, and plays a crucial role in the overall quality of the animation.

Key Points

• Clear Silhouette

1. Clear black or white silhouettes.
2. No confusing overlapping parts or blurry shapes.
3. Clearly expressing emotions and moods.

• Line of Action

1. Smooth and dynamic curves.
2. Usually in the shape of C or S.
3. Guide the line of sight.

• Balance & Weight

1. Locate the center of gravity and determine the center line. The shadow areas on both sides of the center line for the figure should be equal.
2. Determine the support base, such as the range of support provided by the feet. The center line should pass vertically through the core area of the support base.

• Asymmetry

1. The asymmetry of the characters’ movements makes them more vivid and realistic.

• Exaggeration
• Emotion
• Personality

Step1: Search for References

Usually, one can seek references from 2D animation, 3D animation, models, live-action videos or illustrations. Here, I have chosen to use illustration references.

Step2: Posing

1. Adjust the model’s movements according to the reference.
2. Check whether the posture meets the key points of the Golden Pose.
3. Create a 360° presentation animation and export it.

Note:

The entire sole of the foot should make full contact with the ground, and it should not be supported only by the toes.

Feedback:

https://syncsketch.com/sketch/fiQYmTjMdIY5

1.0 First Production

Step1: Making plan

First, understand the principle of the falling motion of the bouncing ball. The core of this process revolves around the four stages: falling – collision – rebound – attenuation.

• Fall: When a small ball falls from a height, it is subject to the force of gravity, resulting in an increasing speed and larger distance in the falling stage.
• Collision: This demonstrates the Squash and Stretch in 12 Principles of Animation. The ball will be stretched by the force of gravity when it approaches the ground (as shown in the blue part of the picture), and compressed by the impact when it touches the ground (as shown in the pink part of the picture).
• Bounce: The ball bounces back after colliding with the ground.
• Damping: After each collision, the kinetic energy of the ball decreases due to friction and deformation, causing the rebound height to gradually decrease and the speed in the horizontal direction to gradually slow down.

Note:

The trajectory of the small ball is a smooth parabola. Due to energy loss, the parabola gradually becomes smaller, and the moving distance of the ball in the horizontal direction decreases.

Step2: Animating

• Set keyframes for the movement trajectory of the small ball:

First, adjust the screen to the front view. Then, set keyframes at the highest and lowest points of each movement trajectory of the small ball. Open the curve editor, cut off the keyframe of the lowest point, adjust each parabolic curve, so that the movement trajectory of the small ball is smooth.

• Set keyframes for the rotation of the small ball:

During the bouncing process of the small ball, it will keep rotating. After stopping bouncing, it will continue to roll for a certain distance.

• Set keyframes for the deformation of the small ball:

According to the plan, the small ball will stretch when approaching the ground and squash when colliding with the ground. Each deformation is weaker than the previous one. When it no longer bounces, it will roll without deformation.

Note:

When the small ball collides with the ground, it must not go beyond the ground; otherwise, it will cause a collision through the model.

2.0 Revised

Step1: Planning

As a plan, I need to label the data as precisely as possible. Therefore, during the revision process, I added specific key frame plans, as well as when the ball squash and stretch, and also drew the deceleration movement of the ball at the end of the roll.

Step2: Animating

• Added the ground.
• Due to the poor elasticity of the ball in the real scene, I reduced the deformation degree of the ball.
• When the ball stops bouncing, its rolling speed decreases gradually until it stops.
• Turned off the controller to observe the ball animation.

Feedback:

https://syncsketch.com/sketch/GJefV8npFc9z