Circuit and Drag Analysis
Circuit / Drag Mode
The mode button in the title bar controls how EmVision interprets race milestones and distance markers:
| Mode | Description |
|---|---|
| Auto (Circuit) | Automatically detected circuit racing — lap and sector markers from GPS |
| Auto (Drag) | Automatically detected drag racing — distance-based markers |
| Forced (Circuit) | Override auto-detection; treat as circuit |
| Forced (Drag) | Override auto-detection; treat as drag |
| Auto (None) | No automatic milestone detection |
Click the button to cycle through modes. Use forced modes when auto-detection picks the wrong type for your log.
Speed Channels
Configure the speed channels used for distance integration in Settings:
| Setting | Purpose |
|---|---|
| Circuit Speed Channel | Speed source for circuit distance calculation |
| Drag Speed Channel | Speed source for drag distance markers |
| Drag Event Trigger Channel | Channel that triggers drag event generation |
Drag Distance Markers
The Tools menu provides drag strip analysis functions. These place distance markers (60 ft, 330 ft, 660 ft, 1320 ft, etc.) on the log timeline.
Generate from Cursor
Tools → Generate drag distance markers from cursor
Places markers at standard drag strip distances, calculated forward from the current cursor position using the drag speed channel.
Generate from Trigger Channel
Tools → Generate drag distance markers from trigger channel
Automatically places markers when the configured trigger channel meets its threshold — useful for batch-processing multiple runs in a single log.
Clear Markers
Tools → Clear drag distance markers on selected section
Removes all drag distance markers from the currently selected log section (reference or overlay).
Note: Drag tools require distance data in the log. If the log has no distance channel, the Tools menu items are disabled.