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Apr 13, 2025
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Add 2024 Gaomon driver conversion formula #217

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FAQ/General: Add 2024 Gaomon driver conversion formula
gonX Nov 9, 2024
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gonX Nov 9, 2024
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45 changes: 34 additions & 11 deletions site/_wiki/FAQ/General.md
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Expand Up @@ -134,18 +134,20 @@ You can see the progress on GitHub here:

Use this reference chart for the upcoming formulas:

| Term | Definition |
| :-----: | :--------- |
| Width | The width of the area in millimeters
| Height | The height of the area in millimeters
| TWidth | The width of the tablet's digitizer in millimeters. Can be found in the tablet's configuration file.
| THeight | The height of the tablet's digitizer in millimeters. Can be found in the tablet's configuration file.
| XOffset | The X offset of the center of the area in millimeters
| YOffset | The Y offset of the center of the area in millimeters
| LPI | Lines per inch, this is commonly 5080 or 2540
| Term | Definition |
| :---------: | :--------- |
| Width | The width of the area in millimeters
| Height | The height of the area in millimeters
| XOffset | The X offset of the center of the area in millimeters
| YOffset | The Y offset of the center of the area in millimeters
| LPI | Lines per inch, this is commonly 5080 or 2540
| TWidth | The width of the tablet's digitizer in millimeters.
| THeight | The height of the tablet's digitizer in millimeters.
| THorizontal | The width of the tablet's digitizer in number of lines.
| TVertical | The height of the tablet's digitizer in number of lines.
{: .table .table-dark }

`TWidth` and `THeight` can be found in the tablet's configuration file.
`TWidth`, `THeight`, `THorizontal`, and `TVertical` can be found in the tablet's configuration file.

Use the following formulas to get values for OpenTabletDriver's area editor's `Width`, `Height`, `XOffset`, and `YOffset` fields:

Expand Down Expand Up @@ -187,7 +189,9 @@ XOffset = (Width / 2) + (XPX / 3.937)
YOffset = (Height / 2) + (XPY / 3.937)
```

#### Huion and Gaomon
#### Huion and Gaomon {#gaomon-v1}

Newer Gaomon drivers use another formula. Please see [Gaomon 2024 and up](#gaomon-v2) for those.

| Term | Definition |
| :----: | --- |
Expand All @@ -205,3 +209,22 @@ Height = (Bottom - Top) * THeight
XOffset = (Width / 2) + (Left * TWidth)
YOffset = (Height / 2) + (Top * THeight)
```

#### Gaomon 2024 and up {#gaomon-v2}

| Term | Definition |
| :----------: | --- |
| GaomonWidth | The number of horizontal lines set in the Gaomon driver
| GaomonHeight | The number of vertical lines set in the Gaomon driver
| GaomonX | The X offset of the top left corner of the area in number of horizontal lines
| GaomonY | The Y offset of the top left corner of the area in number of vertical lines
{: .table .table-dark }

**Formula**:

```py
Width = (GaomonWidth / THorizontal) * TWidth
Height = (GaomonHeight / TVertical) * THeight
XOffset = (GaomonX / THorizontal) * TWidth + (Width / 2)
YOffset = (GaomonY / TVertical) * THeight + (Height / 2)
```
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