Moving Shape ⚡🅡🅞🅣🅘

Every other mask node in this pack starts from something - a video, an audio signal, motion, a color. Moving Shape starts from nothing. Give it a canvas size and a shape, and it draws a square, circle, or triangle that travels from one point to another over your sequence, with its own easing and optional growth. No image or mask input required at all - it's a pure generator, which makes it handy for wipes, spotlight reveals, synthetic test masks, or just something animated to drive a compositing effect when you don't have (or don't want to derive from) real footage.

How it works

frame_width/frame_height set the canvas, num_frames the sequence length, shape picks square/circle/triangle, and rgb sets its color as a literal string like (255,255,255). Size is set as a percentage of the frame (shape_width_percent/shape_height_percent), and position is relative too - shape_start_position_x/y and shape_end_position_x/y run from -100 to 100, not pixels, so the shape travels from a start point to an end point over the animation.

movement_type is the easing curve for that travel - linear, ease_in_out, bounce, elastic - note this is a separate, smaller list than the temporal_easing options you'll see elsewhere in the pack (no none option here; movement always happens). grow lets the shape expand as it moves. palindrome plays the whole animation forward then reverses it within the same frame count, rather than just moving one-way. delay holds the shape static for a number of frames before the movement starts - useful for a beat of stillness before a reveal begins.

The inputs and outputs that matter

• shape - square, circle, or triangle.
• shape_width_percent / shape_height_percent (default 50) - size as a percent of the frame.
• shape_start_position_x/y / shape_end_position_x/y (-100 to 100) - the travel path, relative to frame center, not pixels.
• movement_type - linear / ease_in_out / bounce / elastic.
• grow - expansion over the animation.
• palindrome / delay - reverse-and-repeat, and a static hold before motion starts.

Output is a single MASK - feed it straight into any masking or compositing node, or into FlexMaskWarp and friends if you want to layer the pack's other mask distortions on top of a clean synthetic shape.

How to install it

ComfyUI Manager: search "RyanOnTheInside", install, restart. Manually:

cd ComfyUI/custom_nodes
git clone https://github.com/ryanontheinside/ComfyUI_RyanOnTheInside
cd ComfyUI_RyanOnTheInside
pip install -r requirements.txt

then restart. Pure procedural drawing - no model download, and this node doesn't touch the pack's heavier audio or particle dependencies.

Common issues & troubleshooting

Shape doesn't move at all. shape_start_position_x/y and shape_end_position_x/y all default to 0 - if you leave the end position equal to the start, there's nothing to animate toward. Set an actual end position different from the start.

Shape ends up off-screen or clipped. The -100 to 100 position range is relative to the frame, not pixel coordinates, and it stacks with shape_width_percent/shape_height_percent - a large shape pushed to a position near ±100 will run off the visible canvas. Bring the position closer to 0 or shrink the shape if it's getting clipped.

Movement looks abrupt instead of smooth. That's movement_type set to linear (constant speed, no easing) - switch to ease_in_out for a gentler start/stop, or bounce/elastic if you want overshoot.