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hermes-agent/skills/creative/manim-video/references/camera-and-3d.md
SHL0MS 9d885b266c feat(skills): add manim-video skill for mathematical and technical animations 
Production pipeline for creating 3Blue1Brown-style animated videos
using Manim Community Edition. The agent handles the full workflow:
creative planning, Python code generation, rendering, scene stitching,
audio muxing, and iterative refinement.

Modes: concept explainers, equation derivations, algorithm
visualizations, data stories, architecture diagrams, paper explainers,
3D visualizations.

9 reference files, setup verification script, README.
All API references verified against ManimCommunity/manim source.
2026-04-05 19:09:37 -04:00

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Camera and 3D Reference

MovingCameraScene (2D Camera Control)

class ZoomExample(MovingCameraScene):
    def construct(self):
        circle = Circle(radius=2, color=BLUE)
        self.play(Create(circle))
        # Zoom in
        self.play(self.camera.frame.animate.set(width=4).move_to(circle.get_top()), run_time=2)
        self.wait(2)
        # Zoom back out
        self.play(self.camera.frame.animate.set(width=14.222).move_to(ORIGIN), run_time=2)

Camera Operations

self.camera.frame.animate.set(width=6)     # zoom in
self.camera.frame.animate.set(width=20)    # zoom out
self.camera.frame.animate.move_to(target)  # pan
self.camera.frame.save_state()             # save
self.play(Restore(self.camera.frame))      # restore

ThreeDScene

class ThreeDExample(ThreeDScene):
    def construct(self):
        self.set_camera_orientation(phi=60*DEGREES, theta=-45*DEGREES)
        axes = ThreeDAxes()
        surface = Surface(
            lambda u, v: axes.c2p(u, v, np.sin(u) * np.cos(v)),
            u_range=[-PI, PI], v_range=[-PI, PI], resolution=(30, 30)
        )
        surface.set_color_by_gradient(BLUE, GREEN, YELLOW)
        self.play(Create(axes), Create(surface))
        self.begin_ambient_camera_rotation(rate=0.2)
        self.wait(5)
        self.stop_ambient_camera_rotation()

Camera Control in 3D

self.set_camera_orientation(phi=70*DEGREES, theta=-45*DEGREES)
self.move_camera(phi=45*DEGREES, theta=30*DEGREES, run_time=2)
self.begin_ambient_camera_rotation(rate=0.2)

3D Mobjects

sphere = Sphere(radius=1).set_color(BLUE).set_opacity(0.7)
cube = Cube(side_length=2, fill_color=GREEN, fill_opacity=0.5)
arrow = Arrow3D(start=ORIGIN, end=[2, 1, 1], color=RED)
# 2D text facing camera:
label = Text("Label", font_size=30)
self.add_fixed_in_frame_mobjects(label)

Parametric Curves

helix = ParametricFunction(
    lambda t: [np.cos(t), np.sin(t), t / (2*PI)],
    t_range=[0, 4*PI], color=YELLOW
)

When to Use 3D

  • Surfaces, vector fields, spatial geometry, 3D transforms

When NOT to Use 3D

  • 2D concepts, text-heavy scenes, flat data (bar charts, time series)