Camera Field-of-View (FOV) Cones

When you place a camera on the floor plan, FieldMarkup draws a translucent wedge radiating out from the camera's position. This is the field-of-view cone. It shows the area that camera can see.

This is one of the main reasons FieldMarkup exists. Bluebeam and Acrobat cannot draw a camera's coverage. They do not know what a camera is. FieldMarkup does it natively because it does.

FOV cones are available on any device that has a directional coverage pattern:

• All cameras: Dome (90° default), Bullet (70°), PTZ (60°), 180° panoramic (180°), Multisensor (70° per cone), Dual-lens (90° per cone), Generic (80°)
• REX / motion sensors: Access-control REX sensors (110°) and intrusion motion sensors (110°)
• Custom hardware: when you create a custom device and mark it as directional

Omnidirectional devices (360° fisheye cameras, smoke detectors, door contacts) don't show FOV cones. They cover all directions equally.

Select a camera (or any FOV-capable device) and use the properties panel to adjust:

• Angle: how wide the cone spreads. A dome camera with a varifocal lens might range from 30° (narrow telephoto) to 120° (wide). Adjust this to match the lens you're speccing.
• Range / radius: how far the cone extends from the camera. Drag the radius slider or enter a value to match the camera's effective detection distance.
• Direction: rotate the camera icon and the cone rotates with it. Point the camera where it's actually aimed.

The Multisensor icon renders four independent FOV cones, each pointing in a different direction (0°, 90°, 180°, 270° by default, 70° wide each). The 70° spread leaves small gaps between cones so each one is visually distinct and you can grab its resize handle without overlap. This matches the real-world behavior of a four-head multisensor camera covering an intersection.

The Dual-lens icon (labelled "2L") is a two-cone variant for fixed two-imager devices like the Turing TP-X2D4M28. Two cones at 0° and 180° with a 90° spread each, opposite-facing by default.

Per-cone editing: click any cone wedge to select it individually. From there you can change that cone's rotation, angle, or radius without touching the others. Use the Delete cone button to remove a cone permanently (a multisensor needs at least two cones, so the button greys out at two).

FOV cones serve three purposes on a job:

1. Site surveys: show the customer exactly what each camera covers. When a customer asks "can this camera see the parking lot?", the cone on the plan answers it visually.
2. Design validation: check for coverage gaps and overlaps before the install crew shows up. Two cones that don't overlap = a blind spot you'll have to fix later.
3. Customer presentations: a plan with FOV cones shows you have actually thought about where each camera points.

FOV cones export cleanly into the PDF. They appear as translucent colored wedges, printed at 25% opacity so they don't obscure the floor plan beneath them.