video/.agents/skills/manim-composer/references/visual-techniques.md

Visual Techniques for Math Animation

Effective visualization patterns for explaining mathematical concepts.

Core Principles

1. Progressive Disclosure

Never show everything at once. Build complexity gradually.

Bad: Show complete equation immediately Good: Build equation term by term, explaining each part

Scene flow:
1. Show simple case: f(x) = x²
2. Add complexity: f(x) = ax²
3. Full form: f(x) = ax² + bx + c

2. Transform, Don't Replace

When possible, morph objects into new forms rather than fading out/in.

Bad: FadeOut(equation1), FadeIn(equation2) Good: TransformMatchingTex(equation1, equation2)

This maintains visual continuity and shows the relationship between forms.

3. Color as Meaning

Use color consistently to encode meaning throughout the video.

Pattern:

• Input/given values: BLUE
• Output/results: GREEN
• Key terms being discussed: YELLOW highlight
• Errors/negatives: RED
• Neutral/supporting: WHITE/GREY

4. Spatial Relationships

Position encodes relationships:

• Left-to-right: transformation, time, causation
• Top-to-bottom: hierarchy, derivation
• Center: focus of attention
• Periphery: context, reference

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Animation Techniques

Highlighting & Focus

Indicate - Brief flash to draw attention

self.play(Indicate(term))

Circumscribe - Circle around important element

self.play(Circumscribe(equation, color=YELLOW))

FlashAround - Dramatic attention on revelation

self.play(FlashAround(result))

Equation Manipulation

Isolate terms - Color or move specific parts

equation.set_color_by_tex("x", BLUE)

Step-by-step derivation - Show each algebraic step

step1 = MathTex(r"2x + 4 = 10")
step2 = MathTex(r"2x = 6")
step3 = MathTex(r"x = 3")
# Transform between steps with alignment

Substitution - Show value being plugged in

# Animate the number moving into the variable's position

Geometric Intuition

Coordinate systems - Always label axes

axes = Axes(x_range=[-3, 3], y_range=[-2, 2])
labels = axes.get_axis_labels(x_label="x", y_label="f(x)")

Trace paths - Show how points move

trace = TracedPath(dot.get_center, stroke_color=YELLOW)

Area visualization - For integrals, sums

area = axes.get_area(graph, x_range=[a, b], color=BLUE, opacity=0.5)

3D Techniques

Camera orbiting - Reveal 3D structure

self.play(frame.animate.reorient(60, 70), run_time=3)

Projection - Show 3D object's 2D shadow

# Helps connect 3D intuition to 2D formulas

Slicing - Cut through 3D objects

# Show cross-sections to understand structure

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Common Visual Metaphors

Vectors as Arrows

• Position vectors: arrows from origin
• Addition: tip-to-tail
• Scaling: stretching/shrinking

Functions as Machines

• Input goes in one side
• Transformation happens
• Output comes out

Matrices as Transformations

• Show grid being transformed
• Track where basis vectors go
• Emphasize determinant as area scaling

Derivatives as Slopes

• Tangent line touching curve
• Zoom in to show local linearity
• Animate slope changing as point moves

Integrals as Accumulation

• Riemann sums with rectangles
• Width → 0 animation
• Area filling under curve

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Scene Composition

The Golden Layout

┌─────────────────────────────────┐
│           TITLE/CONTEXT         │  (top edge)
├─────────────────────────────────┤
│                                 │
│      MAIN VISUALIZATION         │  (center, largest area)
│                                 │
├─────────────────────────────────┤
│    EQUATION / FORMULA           │  (bottom third)
└─────────────────────────────────┘

Side-by-Side Comparison

┌───────────────┬───────────────┐
│   BEFORE /    │   AFTER /     │
│   CONCEPT A   │   CONCEPT B   │
└───────────────┴───────────────┘

Zoomed Detail

┌─────────────────────────────────┐
│  ┌─────┐                        │
│  │ZOOM │ ←── magnified detail   │
│  └─────┘                        │
│         Main context            │
└─────────────────────────────────┘

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Timing Guidelines

Action	Typical Duration
Simple shape creation	0.5-1s
Text/equation writing	1-2s
Transformation	1-2s
Camera movement	2-3s
Pause for absorption	0.5-1s
Complex animation	2-4s

Rhythm Pattern

Fast-fast-SLOW-fast-fast-SLOW

Quick animations for setup, slow down for key insights.

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Color Palettes

Classic 3b1b

• Background: #1C1C1C (dark grey)
• Primary: #58C4DD (blue)
• Secondary: #83C167 (green)
• Accent: #FFFF00 (yellow)
• Warning: #FF6666 (red)

High Contrast

• Background: #000000
• Primary: #FFFFFF
• Accent: #FFD700

Soft Academic

• Background: #2D2D2D
• Primary: #6ECFFF
• Secondary: #98E898
• Accent: #FFE66D