Summary
The issue at hand is keeping the eyelid line SVGs next to the eyelids SVGs regardless of the overall SVG proportion. This requires precise positioning of the eyelid lines in relation to the wipe line of the eyelids, which is controlled by the clipPath property and the mouse position.
Root Cause
The root cause of the issue is the incorrect calculation of the absolute Y position of the eyelid lines within their respective SVG containers. This leads to a mismatch between the intended position of the eyelid lines and their actual position, causing them to not stay next to the eyelids as desired.
Why This Happens in Real Systems
This issue occurs in real systems due to several factors:
- Complexity of SVG transformations: SVG transformations, such as
translateY, can be tricky to manage, especially when dealing with multiple elements and containers. - Dynamic positioning: The dynamic nature of the positioning, based on mouse movement and blinking animation, adds to the complexity of maintaining the correct relative positions of the elements.
- Units and scaling: The use of different units (e.g., pixels, percentages) and scaling factors can lead to discrepancies in the positioning calculations.
Real-World Impact
The impact of this issue includes:
- Visual inconsistencies: The eyelid lines may appear disconnected from the eyelids, creating an unnatural appearance.
- User experience: The inconsistency can be distracting and may affect the overall user experience, especially in applications where precise graphics are crucial.
Example or Code
const requiredTranslateYLeft = targetWipeLineAbsoluteY - defaultAbsYOfLeftLine + 1;
const requiredTranslateYRight = targetWipeLineAbsoluteY - defaultAbsYOfRightLine;
eyelidlineLeft.style.transform = `translateY(${requiredTranslateYLeft}px)`;
eyelidlineRight.style.transform = `translateY(${requiredTranslateYRight}px)`;How Senior Engineers Fix It
Senior engineers fix this issue by:
- Carefully reviewing the positioning calculations: Ensuring that all calculations are correct and taking into account the various factors that affect the positioning, such as SVG transformations, dynamic positioning, and units/scaling.
- Using debugging tools: Utilizing debugging tools to inspect the elements and their positions, allowing for a better understanding of the issue and the development of an effective solution.
- Implementing robust testing: Creating comprehensive tests to verify the correctness of the positioning under various scenarios, including different mouse positions, blinking animations, and SVG proportions.
Why Juniors Miss It
Junior engineers may miss this issue due to:
- Lack of experience with SVG transformations: Inadequate understanding of how SVG transformations work and how they interact with other elements and containers.
- Insufficient attention to detail: Overlooking the complexities of dynamic positioning and the potential for discrepancies in positioning calculations.
- Limited debugging skills: Inability to effectively use debugging tools to identify and diagnose the issue, leading to a prolonged and challenging resolution process.