3D Rendering Point Feature as A Billboard

[ismailsunni]

This improvement will enable QGIS to render a point feature as a billboard. Billboard means that the object will always face to the camera. The use case would be showing icon in a location (e.g. showing the name of a place with an icon) In this feature, user will need to specify how the billboard will be seen. Basic use case will be:

Choose the point layer that needs to be styled/rendered as billboard Set the style of the point, some options would be Style with icon or default shape (e.g. rectangle) Set the size, color, and opacity of the icon or shape Set text or label Allow leader lines between point feature and billboard, with a configurable vertical offset (best also data-defined). It would help better locate the position of the actual feature.

Mockup for the billboard option:

It will use the symbol chooser (which has the option to set the size, opacity, or even use SVG file, etc).

Steps:

• [ ] Add UI to add the billboard
• [ ] Apply the billboard rendering
  • [ ] Create an image from the symbol --> store it where?
• [ ] Save the change (make it persistent)

Additional features (wishlist):

• [ ] Option to create a line from the billboard to the terrain or the feature
• [ ] Add label

[ismailsunni]

Updated mock up after disccsion with mentors:

Notes:

• No need to store the image from the symbol, we can pass it as QImage

Steps:

• Learn about GLSL
• Port the QML from experiment project to Qt C++
• Use it in QGIS with a static image
• Use image from symbol

[ismailsunni]

Billboard is shown, but not the QgsSymbolButton

[ismailsunni]

Sample from Google maps

[ismailsunni]

[ismailsunni]

Work is merged :)