CODEWITHSUNDEEP
autodesk-forgeautodesk-viewer
Dominik
Dominik

Reputation: 281

`viewer.navigation.fitBounds` without margin

I want to create high resolution screenshots of a specific image section. My approach is to create multiple screenshots from each quarter of my section (top left, top right, bottom left, bottom right). For that I am using viewer.navigation.fitBounds. However, there seems to be a little margin which I wanna get rid of because I cannot stitch the quarter screenshots together easily.

Is viewer.navigation.fitBounds supposed to fit the bounds perfectly and therefore, is it a usage error on my side?

Example

The black markers represent my bounding box for upper right screenshot which I use when calling Autodesk.Viewing.ScreenShot.getScreenShotWithBounds. However, there is some space left between the black markers and the top and bottom border. Shows viewer after fitBounds

Upvotes: 0

Views: 329

Answers (1)

Dominik
Dominik

Reputation: 281

The function Navigation.fitBounds uses Navigation.computeFit which uses the following margin settings adding 5% by default to each side:

  // Change these constants to alter the margin ratios (think, percentages/100).
  // The margins are how much to add above and below. For example, setting the
  // margin to 25% (0.25) would give a margin of 25% above, 50% in the middle for
  // content, and 25% below. This value should never be >= 0.50, as that would
  // leave no area for the content to display.
  // The offsets are how much to shift the view. For example, shifting 50% (0.50)
  // vertically would move the displayed area such that only the bottom half of
  // the drawing area would be seen.
  this.FIT_TO_VIEW_VERTICAL_MARGIN = 0.05;
  this.FIT_TO_VIEW_VERTICAL_OFFSET = 0.00;
  this.FIT_TO_VIEW_HORIZONTAL_MARGIN = 0.05;
  this.FIT_TO_VIEW_HORIZONTAL_OFFSET = 0.00;

You can set these variables anywhere before calling viewer.navigation.fitBounds:

const viewer = NOP_VIEWER; // your viewer instance
viewer.navigation.FIT_TO_VIEW_VERTICAL_MARGIN = 0.0;
viewer.navigation.FIT_TO_VIEW_HORIZONTAL_MARGIN = 0.0;

Upvotes: 1

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