| Table of Contents |
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1. Calculation on first star facet example highlighted with pink
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| Note |
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| All calculation are performed in 2D. Model is projected on table facet plane |
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1.3 Find most distant point on girdle (call it D) from line a, point should belong to β half-plane. C is point, where perpendicular from point D is crossing line a:
1.4 Star Upper Star ratio is |AB| length divided by |CD| length and transferred to percentage view.
1.5 Upper ratio is equal to expression result (100% - Star ratio).
2. Calculation on second star facet example highlighted with pink
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| Note |
|---|
| All calculation are performed in 2D. Model is projected on table facet plane |
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2.5 Upper ratio is equal to expression result (100% - Star ratio).
3. Star \ Upper ratio parameters in report
3.1 Star \ Upper ratio can be found in Main and Detailed Parameter part of full report, for example:
Main parameters:
Parameter |
| Avg | Min | Max | Dev |
|---|---|---|---|---|---|
Star : Upper ratio | % | 61.39 : 38.61 | 53.29 : 46.71 | 71.25 : 28.75 | 17.96 |
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- UPPER_RATIO_PC
- UPPER_RATIO_PC_1 - UPPER_RATIO_PC_8
- UPPER_RATIO_PC_DEV
- UPPER_RATIO_PC_MIN
- UPPER_RATIO_PC_MAX
3.4 Start Star \ Upper ratio can be found in following report types:
- 8-Facet report
- Full report
- Illustrated report
3.5 Start Star \ Upper ratio is calculated for following cutting types:
- Round brilliant (RBC)
- Round fancies (oval, marquise, heart, pear and etc)
- Cushion
4. Notes
- If you have any question, please ask it in comments or send e-mail to developer.
- If you find mistake, please describe it in comments or send e-mail to developer.