ol-ext: Transform interaction

ol.interaction.Transform is an interaction to transform features (scale, translate, rotate). Handles are drawn on the map to manipulate the features

Properties can be set to select transforming operations.
Handles can be styled with ol.style.
ol.event are thrown to control the transformation (to set an angle propertie on point features to use with ol.style for example)

Options:

styles transform handles (using fontawesome)
enable scale
enable stretch
enable rotate
enable translate
translate when click on feature
force keepAspectRatio (default use Shift)
force matching the map rotation
SetRotateCenter:
Use Shift to add object to tranform
Use Shift key to preserve proportions when scaling (see keepAspectRatio).
Use Ctrl key to modify the center when scaling.