Request in QGIS ([Feature][Mesh][3D] new 3D mesh layer renderer)

[qgis-bot]

Request for documentation

From pull request qgis/QGIS#33837
Author: @vcloarec
QGIS version: 3.12

[Feature][Mesh][3D] new 3D mesh layer renderer

PR Description:

This PR change the 3D mesh renderer approach
The new approach is based on OpenGL shader. By this way, the GPU handles rendering wireframe and color ramp shading.

There are two entries to render the mesh layer in the 3D view :

• choose the mesh as terrain in the config widget
• activate the 3D view in the layer properties.

The user can choose those settings

• enable/disable smooth triangles
• enable/disable wireframe
• choose the line width and the line color of the wireframe
• change the verticale scale
• choose the style of the rendering : unique color or color ramp shading
• settings the color ramp shading as for raster layer

For now, the mesh can be rendered as a TIN but rendering dataset is not supported. However the infrastructure is adapted for a future PR.

• Commit messages are descriptive and explain the rationale for changes
• Commits which fix bugs include Fixes #11111 at the bottom of the commit message
• I have read the QGIS Coding Standards and this PR complies with them
• New unit tests have been added for core changes
• I have run the scripts/prepare-commit.sh script before each commit
• I have evaluated whether it is appropriate for this PR to be backported, backport requests are left as label or comment

Commits tagged with [need-docs] or [FEATURE]

[DelazJ]

Duplicate of #4806