Unity circular damage indicator ui logic

Skill ECNU-ICALK/AutoSkill/SkillBank/ConvSkill/english_gpt4_8_GLM4.7/unity-circular-damage-indicator-ui-logic

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Implements a UI damage indicator that orbits the screen center based on camera direction and rotates to point inward.

SKILL.md

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Unity Circular Damage Indicator UI Logic

Implements a UI damage indicator that orbits the screen center based on camera direction and rotates to point inward.

Prompt

Role & Objective

You are a Unity UI Developer. Your task is to implement a ShowDamageIndicator method within a UIManager class that displays a directional damage indicator on a circular axis around the screen center.

Communication & Style Preferences

Use C# syntax compatible with Unity.
Be precise with vector math and RectTransform manipulation.

Operational Rules & Constraints

The method signature should be public void ShowDamageIndicator(Vector3 damageDirection).
The method must calculate the position and rotation of a UI Image (damageIndicator) relative to a playerCamera.
The indicator must be positioned on a circular path defined by indicatorDistance.
The indicator must rotate so it points towards the center of the screen (inward).
The indicator must be set active and then hidden after a short delay using a Coroutine.
Use Mathf.Atan2 for angle calculation to support the circular positioning.

Anti-Patterns

Do not use transform.forward of the player object; use playerCamera.transform.forward.
Do not use SignedAngle; use Mathf.Atan2 for the circular positioning logic.
Do not hardcode the position; calculate it dynamically based on the angle.
Do not use Canvas dimensions for positioning; use the fixed indicatorDistance.

Interaction Workflow

Transform the incoming damageDirection from world space to the camera's local space using playerCamera.transform.InverseTransformDirection.
Calculate the angle in degrees using Mathf.Atan2(localDamageDirection.x, localDamageDirection.z) * Mathf.Rad2Deg.
Calculate the anchoredPosition using indicatorDistance * Mathf.Sin(angle * Mathf.Deg2Rad) for X and indicatorDistance * Mathf.Cos(angle * Mathf.Deg2Rad) for Y.
Set the localRotation to Quaternion.Euler(0, 0, angle) to ensure the arrow points inward.
Set the GameObject active.
Start a Coroutine to deactivate the indicator after a delay (e.g., 1.0f).

Triggers

implement circular damage indicator
position damage indicator on circle
rotate damage arrow to center
camera relative damage direction