LoadScreenPoints

Only in Wrap4D

Loads 2D points from file.

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

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Output

ScreenPoints Array of 2D points

Parameters

File Name:

a file path to load from. Supports Path Interpretation.

Format:

PFTrack

a format that can be exported from PFTrack software.

JSON

a format that can be exported from 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 Resolution:

image width and height 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.

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
                }
        ]
        }
}