PointCloud entity: Assigning an opacity to a colormap does not make the point cloud material transparent

Summary

Colormaps can have an optional opacity array, that drives the opacity of the color. But for this to work, the material must be set to transparent, otherwise the opacity value is ignored.

Steps to reproduce

1. Create a point cloud entity from a COPC source
2. Assign a colormap with an opacity array

Expected behaviour:

The colormap opacity is rendered correctly.

Actual behaviour:

The colormap opacity is ignored, because the material is not set to transparent.

Informations

• Giro3D version: 0.41
• Browser (Firefox, Chrome, Opera, Safari...) and version: N/A
• OS (Linux, MacOS, Windows...) N/A