uloop-simulate-mouse-input

name	uloop-simulate-mouse-input
description	Simulate mouse input in PlayMode via Input System. Injects button clicks, mouse delta, and scroll wheel directly into Mouse.current. Use when you need to: (1) Click in games that read Mouse.current.leftButton.wasPressedThisFrame, (2) Right-click for actions like block placement, (3) Inject mouse delta for FPS camera control, (4) Inject scroll wheel for hotbar switching or zoom. For UI elements with IPointerClickHandler, use simulate-mouse-ui instead.
context	fork

Task

Simulate mouse input via Input System in Unity PlayMode: $ARGUMENTS

Workflow

1. Ensure Unity is in PlayMode (use uloop control-play-mode --action Play if not)
2. For Click/LongPress: determine the target screen position (use uloop screenshot to find coordinates)
3. Execute the appropriate uloop simulate-mouse-input command
4. Take a screenshot to verify the result: uloop screenshot --capture-mode rendering
5. Report what happened

Tool Reference

uloop simulate-mouse-input --action <action> [options]

Parameters

Parameter	Type	Default	Description
--action	enum	Click	Click, LongPress, MoveDelta, SmoothDelta, Scroll
--x	number	0	Target X position (origin: top-left). Used by Click and LongPress.
--y	number	0	Target Y position (origin: top-left). Used by Click and LongPress.
--button	enum	Left	Mouse button: Left, Right, Middle. Used by Click and LongPress.
--duration	number	0	Hold duration for LongPress, or interpolation duration for SmoothDelta (seconds). For Click, 0 = one-shot tap.
--delta-x	number	0	Delta X in pixels for MoveDelta/SmoothDelta. Positive = right.
--delta-y	number	0	Delta Y in pixels for MoveDelta/SmoothDelta. Positive = up.
--scroll-x	number	0	Horizontal scroll delta for Scroll action.
--scroll-y	number	0	Vertical scroll delta for Scroll action. Typically 120 per notch.

Actions

Action	What it injects	Description
Click	Mouse.current button press → release	Inject a button click so game logic detects wasPressedThisFrame
LongPress	Mouse.current button press → hold → release	Hold a button for --duration seconds
MoveDelta	Mouse.current.delta	Inject mouse movement delta one-shot (e.g. for FPS camera look)
SmoothDelta	Mouse.current.delta (per-frame)	Inject mouse delta smoothly over --duration seconds (human-like camera pan)
Scroll	Mouse.current.scroll	Inject scroll wheel input (e.g. for hotbar or zoom)

Global Options (all optional, mutually exclusive)

Usually not needed — the CLI auto-detects the Unity project from the current working directory.

Option	Description
--project-path <path>	Override auto-detection to target a specific Unity project
-p, --port <port>	Specify Unity TCP port directly

When to use this vs simulate-mouse-ui

Scenario	Tool
Click a Unity UI Button (IPointerClickHandler)	simulate-mouse-ui
Destroy a block in Minecraft (reads Mouse.current.leftButton)	simulate-mouse-input
Place a block with right-click	simulate-mouse-input --button Right
Drag a UI slider	simulate-mouse-ui --action Drag
Look around with mouse (FPS camera)	simulate-mouse-input --action MoveDelta
Scroll hotbar slots	simulate-mouse-input --action Scroll

Examples

# Left-click at screen center (for game logic)
uloop simulate-mouse-input --action Click --x 400 --y 300

# Right-click at screen center (e.g. place block)
uloop simulate-mouse-input --action Click --x 400 --y 300 --button Right

# Hold left-click for 2 seconds (e.g. mine block)
uloop simulate-mouse-input --action LongPress --x 400 --y 300 --duration 2.0

# Look right (FPS camera)
uloop simulate-mouse-input --action MoveDelta --delta-x 100 --delta-y 0

# Scroll up (e.g. previous hotbar slot)
uloop simulate-mouse-input --action Scroll --scroll-y 120

# Scroll down (e.g. next hotbar slot)
uloop simulate-mouse-input --action Scroll --scroll-y -120

# Smooth camera pan right over 0.5 seconds
uloop simulate-mouse-input --action SmoothDelta --delta-x 300 --delta-y 0 --duration 0.5

Prerequisites

• Unity must be in PlayMode
• Input System package must be installed (com.unity.inputsystem)
• Active Input Handling must be set to Input System Package (New) or Both in Player Settings
• Game code must read input via Input System API (e.g. Mouse.current.leftButton.wasPressedThisFrame)