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# Task 3 Report: [Hover Interaction (Visual Feedback)]
# Task: [Feature Name]
## Objective
When the user hovers over the 3D object, something changes visually (e.g., color, scale).
What is the feature trying to do?
## Vanilla Three.js
- Possible: **Yes**
- Notes: Requires setting up a `Raycaster`, calculating **Normalized Device Coordinates (NDC)** for the mouse, and manually toggling states inside a `mousemove` event listener.
- Key concepts: `THREE.Raycaster`, `mousemove`, `NDC calculation`, `Manual State Management`.
- Complexity: **Medium** (High math/boilerplate).
## Vanilla three.js
-Possible: Yes / Partial / No
-Notes:
-Key concepts:
-Complexity: Easy / Medium / Hard
## R3F
- Possible: **Yes**
- Notes: Extremely intuitive. Built-in `onPointerOver` and `onPointerOut` props handle everything declaratively. State management is simple with `useState`.
- What R3F abstracted: `Raycaster computation`, `Normalized Coordinates`, `Event-to-Mesh mapping`.
- Complexity: **Easy** (Very concise, 5-10 lines of code).
-Possible: Yes / Partial / No
-Notes:
-What R3F abstracted:
-Complexity: Easy / Medium / Hard
## Thob Page Builder
- Possible: **No (for hover interaction)**
-Possible: Yes / Partial / No
-Notes:
- Hover interaction is not supported in the current UI
- Click trigger exists but did not produce consistent results during testing
- Interaction system appears limited or unstable for dynamic visual feedback
- Complexity: **Limited** (interaction features not fully functional)
---
-Builder steps:
-Complexity: Easy / Medium / Hard
## Comparison Summary
- Possible in all 3? **No** (hover interaction not supported in builder)
-Possible in all 3? Yes / Partial / No
-Main differences:
- **Vanilla**: Powerful but requires manual setup
- **R3F**: Simplest and most reliable interaction system
- **Thob**: Limited interaction support; hover missing and click behavior unclear
-Where Thob is better:
- **Static visual prototyping**
-Where Thob is weaker:
- **Interaction system reliability**
- Lack of hover support
- Unclear event-to-property binding
-What feels awkward or unclear:
- Interaction triggers are visible but behavior is not always predictable
---
## Limitation Type
## Limitation Type (if any)
-[ ] Editor UX limitation
- [x] Runtime limitation (event execution unclear)
-[ ] Runtime limitation
-[ ] Schema / data model limitation
-[ ] Component limitation
- [x] Event system limitation
- [x] Property binding limitation
-[ ] Event system limitation
-[ ] Asset pipeline limitation
---
-[ ] Unknown / needs investigation
## Workaround
- No reliable workaround found for hover interaction
- Click interaction may require further investigation or configuration
---
-Is there a workaround?
-If yes, what is it?
## Suggested Improvement
-What should improve in Thob?
-Is it:
-editor
-runtime
-component
-UX
-schema/data
- Improve reliability of event execution (e.g., onClick behavior)
- Introduce hover interaction support (`onHoverStart`, `onHoverEnd`)
- Provide clearer feedback when event actions fail
## Difficulty Estimate
-Easy / Medium / Hard
---
## Business Value
-Low / Medium / High
## Recommendation
To enable interactive 3D experiences, the builder should strengthen its event system, ensuring reliable execution of click triggers and adding support for hover-based interactions.
Should Thob support this better? Why?

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# Builder Exploration Notes — Task 3: Hover Interaction
## Capability Gap Identified
- **Hover Events**: No visible support for `onPointerOver` / `onPointerOut` (hover) in the interaction panel
- **Click Behavior**: `onClick` trigger is present in UI, but actions did not produce visible results during testing
- **Visual Logic**: No clear way to connect user interaction to visual state changes (e.g., color/scale)
- **Interaction Experience**: Scene appears static due to lack of responsive feedback
---
## Observations
- Interaction UI exists but execution behavior is unclear or inconsistent
- Hover-based interaction is not exposed as a first-class concept
- Click interaction may require additional configuration or may be unstable in current environment
---
## Comparison vs Code
- **Vanilla**:
- Requires raycasting and mouse tracking
- Fully controllable but complex
- **R3F**:
- Hover interaction is simple using `onPointerOver` / `onPointerOut`
- Very intuitive and minimal code
- **Thob**:
- Hover interaction not available
- Click interaction present but did not behave as expected during testing
---
## Key Insight
The builder currently lacks clear support for continuous pointer-based interactions (like hover) and shows limitations in reliably executing event-based visual updates.
---
## Product Perspective
Hover interactions are essential for user feedback (highlighting, selection cues). The absence or instability of such interactions limits the builders ability to create engaging 3D experiences.
---
## Verdict
Strong for **static visual setup**
Limited for **interactive behavior (hover and dynamic feedback)**