LoadScreenPoints

Only in Wrap4D

Loads 2D points from file.

LoadScreenPoints can load points in JSON and PFTrack formats. The JSON format is described below.

---

Output

ScreenPoints Array of 2D points

Parameters

File Name

file name to load screen points from.

Format

PFTrack

a format that can be exported from PFTrack software.

JSON

a format that can be exported from R3DS Track.

Reload

forces to reload points from the file.

PFTrack Options Tab

Clip Number

index of imported clip. PFTrack supports tracking from multiple views in a single project. Clip Number specifies which clip to use.

Screen Width

image width that was used during tracking. PFTrack exports point coordinates in absolute pixel coordinates while Wrap works with points in normalized (-1 to 1) coordinates. Image width and height are used for normalization.

Screen Height

image height.

JSON File Format

All the tracked points are stored in normalized coordinates (-1 to 1) where X axis looks to the right and Y axis looks up. The point (0, 0) corresponds to the center of the screen. The point (1, 1) corresponds to the top-right corner.

{
  "FormatVersion": 0,
    "Points": {
        "Nose01": [
                {
                        "Frame": 0,
                        "x": 0.024435,
                        "y": 0.372931
                },
                {
                        "Frame": 1,
                        "x": 0.025539,
                        "y": 0.369124
                }
        ]
        }
}