v1.1.3

rgl 1.1.3

Major changes

• A new function hover3d() has been added to display
  "hover hints": labels next to points when the mouse
  passes near them.
• A new material property "texmode" has been added
  to control how textures are applied. The default is "modulate",
  consistent with previous versions. If set to "replace",
  the texture is displayed without any lighting effects or dependence
  on the original color of the surface.
• Many of the demos have been moved to a new vignette called
  demos.
• rgl now uses the glad loader which will eventually allow
  access to newer OpenGL functions in systems that support them.

Minor changes

• The texenvmap = TRUE material property is now supported
  in WebGL.
• The method of including shader source code
  has changed to work around a limitation in Jupyter.
• The default C++ standard is now accepted, rather
  than requiring C++11. On R versions prior to R 4.2.0
  C++11 is still requested.

Bug fixes

• The as.mesh3d.rglId() and as.triangles3d.rglId() methods
  and the selectpoints3d(), writeOBJ(), writePLY()
  and writeSTL()
  functions did not handle indices
  in the objects they were processing (issue #293).
• Transparent planes were not always drawn properly
  in WebGL (issue #300).
• view3d() now returns a lowlevel() result so that
  it will be handled properly in WebGL vignettes with
  auto printing.
• If transform3d() or rotate3d() changed the orientation
  of a mesh3d object with normals, the normals ended up
  with the wrong sign. (Reported by Stephane Laurent.)
• scene3d() (and hence rglwidget()) did not save
  the normals for unlit objects. When the objects were
  also indexed, this prevented proper calculation of
  front and back. This is fixed, and a warning is
  issued if normals are not provided when needed.
• It was possible to call glVersion before OpenGL was
  initialized; this resulted in a segfault with the new
  glad loader, and may have been the cause of some older crashes
  as well. This has been fixed.
• readOBJ() did not handle comments properly.
• Sprites consisting only of line segments (as used
  for example by pch3d()) caused rendering to fail in
  rglwidget() (issue #316).
• Headers have been cleaned up to fix problems
  identified by Rtools43.