kevinbadi/blender-skills

dolly-rotate

Camera moves forward while rotating around the product.

Quelltext ansehen

Verwendung

  1. Installationsbefehl kopieren und das Quellpaket vor der Installation in der eigenen Agentenumgebung prüfen.
  2. Benötigte Werkzeuge, Zugangsdaten und Hosts im Original prüfen.
  3. Eingabe und gewünschtes Ergebnis beschreiben und die Ausgabe mit den Quellen abgleichen.
npx skills add https://github.com/kevinbadi/blender-skills --skill dolly-rotate

Vor dem Start

  • Die Installation umfasst weder Modellabo noch API-Kontingent oder Dateizugriffsrechte.
  • Sterne und Installationen zeigen Aktivität, keine unabhängige Qualitäts- oder Sicherheitsprüfung.
Originales Skill-Dokument

Aus dem Quell-Repository gerendert; Überschriften, Beispiele, Code, Tabellen, Links und Bilder bleiben erhalten.

Dolly + Rotate Camera Animation

Camera dollies forward while simultaneously rotating around the product, creating a dynamic sweeping reveal that's more engaging than a straight zoom or static orbit.

When to Use

  • User wants a "dynamic" or "sweeping" shot
  • User says "dolly", "move and rotate", "sweeping reveal"
  • More cinematic than a simple turntable

Parameters

ParameterDefaultDescription
duration5Video length in seconds
fps24Frames per second
rotation_degrees90How far to rotate during the dolly
start_distance4.0Starting distance
end_distance2.5Ending distance
start_height2.0Starting height
end_height1.5Ending height

Flow

Step 1: Set Up Camera Rig

python
import bpy, math

bpy.ops.object.empty_add(type='PLAIN_AXES', location=(0, 0, 0.05))
tgt = bpy.context.active_object
tgt.name = 'DollyTarget'

bpy.ops.object.camera_add(location=(2.5, -START_DISTANCE, START_HEIGHT))
cam = bpy.context.active_object
cam.name = 'DollyCam'
cam.data.lens = 40

trk = cam.constraints.new(type='TRACK_TO')
trk.target = tgt
trk.track_axis = 'TRACK_NEGATIVE_Z'
trk.up_axis = 'UP_Y'

# Parent camera to target for orbital rotation
bpy.ops.object.select_all(action='DESELECT')
cam.select_set(True)
tgt.select_set(True)
bpy.context.view_layer.objects.active = tgt
bpy.ops.object.parent_set(type='OBJECT', keep_transform=True)

bpy.context.scene.camera = cam

Step 2: Animate Dolly + Rotation

python
TOTAL_FRAMES = DURATION * FPS

scene = bpy.context.scene
scene.frame_start = 1
scene.frame_end = TOTAL_FRAMES
scene.render.fps = FPS

# Frame 1: start position
tgt.rotation_euler = (0, 0, 0)
tgt.keyframe_insert(data_path='rotation_euler', frame=1)
cam.location = (2.5, -START_DISTANCE, START_HEIGHT)
cam.keyframe_insert(data_path='location', frame=1)
cam.data.lens = 40
cam.data.keyframe_insert(data_path='lens', frame=1)

# End: rotated + closer
tgt.rotation_euler = (0, 0, math.radians(ROTATION_DEGREES))
tgt.keyframe_insert(data_path='rotation_euler', frame=TOTAL_FRAMES)
cam.location = (1.5, -END_DISTANCE, END_HEIGHT)
cam.keyframe_insert(data_path='location', frame=TOTAL_FRAMES)
cam.data.lens = 50
cam.data.keyframe_insert(data_path='lens', frame=TOTAL_FRAMES)

# Default BEZIER interpolation for smooth cinematic feel

Step 3: Render + Encode

Same as turntable — PNG sequence with Cycles, encode to ProRes 4444.

bash
ffmpeg -y -framerate 24 \
  -i "~/Desktop/Blender Videos/dolly_rotate_frames/%04d.png" \
  -c:v prores_ks -profile:v 4444 -pix_fmt yuva444p10le \
  "~/Desktop/Blender Videos/dolly_rotate.mov"

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