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2. **Executable Causal Mechanism (ECM)** — each segment 0–10 |
A score of 0 indicates complete failure in the corresponding evaluation unit, with no meaningful valid structure or execution demonstrated. |
Judge only from the provided specifications and visible evidence. Do not assume invisible structures, interactions, or motions. Inspect all frames and the temporal changes across the full sequence. |
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1. VISUAL STRUCTURE |
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Evaluate whether the static mechanical system is complete, mechanically valid, physically plausible, and capable of supporting the intended behaviors. |
### A. Component Completeness & Geometry |
Check whether: |
* all specified components are present and recognizable; |
* each component has geometry appropriate for its `label` and `action`; |
* any structures are missing, malformed, incorrectly proportioned, or clearly unreasonable. |
### B. Mechanical Structural Validity |
Components must have meaningful mechanical structures, not merely appear to move correctly. |
For example: |
* levers/seesaws require reasonable pivots; |
* articulated rods require appropriate joints; |
* pendulums require suspension points; |
* paddle wheels require rotational axes; |
* tracks, funnels, and chutes must physically support or constrain moving objects. |
Successful scripted motion alone does not imply correct mechanical structure. |
### C. Initial Physical Validity |
Except for the first source component, downstream components should begin in physically plausible static states before being triggered. |
Penalize unsupported floating objects, unconstrained balls stationary on slopes, unbalanced mechanisms held without support, displaced pendulums without holding mechanisms, downstream objects already moving, or other clear violations of gravity, contact, support, or equilibrium. |
### D. Spatial Arrangement & Assembly |
Check whether component positions, heights, orientations, distances, contacts, and alignments support the intended mechanical process. |
Penalize disconnected or misaligned components, unreasonable gaps, interpenetration, overlap, or impossible geometry. |
### E. Camera & Visual Quality |
Important components, structures, and interactions should be sufficiently visible for reliable evaluation. |
Penalize severe cropping, occlusion, blur, deformation, broken geometry, or rendering artifacts. |
Photorealism is not required. |
### Visual Structure Score (0–10) |
**10** = The mechanical structure is complete and fully correct, with all major components fully visible in the frame. Geometry, topology, connectivity, spatial relationships, and relationships between mechanical components closely match the reference. All contacts, joints, engagements, and relative placements are mech... |
**9** = The mechanical structure and relationships between components are fully correct and clearly visible, with no physically implausible relationships. All major components are fully visible. Only very minor shortcomings exist in aesthetics, lighting, materials, 3D presentation, or camera placement, while the overal... |
**8** = The mechanical structure and relationships between components are correct and physically plausible, with no clear interpenetration, unintended overlap, floating components, incorrect engagement, or other mechanically implausible relationships. All important relationships can be visually verified. The main limit... |
**7** = No clear physically or mechanically incorrect relationship is visible, but some relationships between components are difficult to verify because of camera angle, occlusion, or visual-quality limitations. Most important connections and spatial relationships remain observable, with only limited uncertainty. |
**6** = The visible structure remains mechanically plausible, with no clearly observed interpenetration, floating components, incorrect engagement, or other physical errors. However, several important relationships between components cannot be reliably verified because of camera angle, occlusion, poor visibility, or re... |
**5** = The overall structure remains mostly correct, but a small number of clear physical or mechanical relationship errors appear, typically limited to 1–2 local cases or a few frames. Examples include two components visibly intersecting, a ball or component unnaturally floating without support, components that shoul... |
**4** = Physical or mechanical relationship errors become more frequent or substantial, with multiple cases of interpenetration, floating components, incorrect engagement, implausible connections, or other invalid component relationships. Important components may also be substantially cropped or occluded, although the ... |
**3** = Severe structural or physical errors are widespread across multiple components. Interpenetration, floating, incorrect connections, implausible component relationships, or incomplete components occur extensively, or the component modeling, mechanical topology, and connectivity themselves are clearly incorrect, p... |
**2** = Most of the mechanical structure contains severe problems. Many major components are missing, severely malformed, misplaced, disconnected, or unobservable, with only limited structure corresponding to the reference. |
**1** = Only minimal recognizable structure related to the reference remains. Most major components and mechanical relationships are missing or severely incorrect, and the result largely fails to form a meaningful mechanical device. |
**0** = No meaningful valid mechanical structure corresponding to the reference is present or observable. |
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2. EXECUTABLE CAUSAL MECHANISM |
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Evaluate whether the system forms a genuine, continuous, complete, and mechanically plausible execution process. |
ECM jointly considers: |
* **Mechanism Execution:** whether each component correctly and completely performs its specified `action`. |
* **Causal Connectivity:** whether each component genuinely and mechanically triggers the next component. |
These are internal evaluation criteria, not separate output scores. |
The component order is already provided. |
For: |
C1 → C2 → C3 → C4 |
evaluate: |
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