Adding text annotations and dimensions

Viewer provides OccViewer.OccViewer.pmi interface to create simple PMI (Product Manufacturing information) presentations, as well as classes OccViewer.LengthDimension or OccViewer.TextLabel.

Example of PMI objects usage:

const aTextParams = {
  id:            "",
  text:          "Label",
  pointPosition: {x:50, y:100, z:10 },
  textPosition:  {x:90, y:190, z:50 },
};
// create and display new text label object
const anTextObj = new TextLabel(OccViewerModule, aTextParams);

...

const aLengthDimensionParams = {
  id:         "",
  startPoint: {x:0,   y:0, z:10 },
  endPoint:   {x:180, y:0, z:10 },
  height:     20,
  dir:        {x:0, y:-1, z:0 },
};
// create and display new length dimension object
const aLengthDimensionObj = new LengthDimension(OccViewerModule, aLengthDimensionParams);

...

// redraw viewer content
OccViewerModule.updateView();
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