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| Input Target Mass (TM) | Preserve Mass Distribution (PMD) | Scaled Model Mass |
|---|---|---|
| TM > 0 | PMD is checked | Each body mass is scaled by the product of its own scale factors, then each body is scaled again by the ratio of the target mass to the sum of the scaled masses. The scaled model mass will equal the input target mass. |
| TM > 0 | PMD is unchecked | The mass of each body is proportionally scaled by the ratio of the target mass to original mass. The scaled model mass will equal the input target mass. |
| TM <= 0 | PMD is checked | None of the body masses change. The scaled model mass will not have changedchange. |
| TM <= 0 | PMD is unchecked | Each body mass is scaled by the product of its own scale factors. The scaled model mass will equal the sum of all the newly scaled body masses. |
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