This tool behaves similarly to the existing "measure angle" map tool,
but requires the user only to click two points on the map and displays
the bearing between these points.
file which is immediately deleted right after the QIcon creation
to store SVG icon content -- instead we need to place the svg in a
temporary folder which exists for the lifetime of the QGIS session
for layers with CRS inaccuracies
If the new "Show CRS accuracy warnings for layers in project legend"
is checked by a user, then any layers with a CRS with accuracy
issues (i.e. a dynamic crs with no coordinate epoch available,
or a crs based on a datum ensemble with accuracy exceeding the
user-set limit) will have a new warning icon reflecting that
the layer is a low-accuracy layer.
This is entirely opt-in, and designed for use in engineering/BIM/...
industries where inaccuracies of meter/submeter level are very
dangerous.
These notes are saved per layer, per project, and can be used as
place to store important messages for users of the project like
to do lists, etc.
Notes can be created via the "Add Layer Notes" action in the
layer right click menu. Any layers with notes will show a little
notepad indicator icon to alert users as to the notes. Clicking
the indicator will edit the note.
Sponsored by Alta Ehf
When enabled, this snapping mode snaps to the beginning or end
vertex of lines only. When snapping to a polygon layer, only
the first vertex in rings will be snapped to.
Refs Natural resources Canada Contract: 3000720707
From the qt docs:
"The Gooch lighting model uses both color and brightness to help show the
curvature of 3D surfaces. This is often better than models such as Phong
that rely purely upon changes in brightness. In situations such as in CAD
and CAM applications where photorealism is not a goal, the Gooch shading
model in conjunction with some kind of silhouette edge inking is a popular
solution.
The Gooch lighting model is explained fully in the original Gooch paper.
The Gooch model mixes a diffuse object color with a user-provided cool
color and warm color to produce the end points of a color ramp that is
used to shade the object based upon the cosine of the angle between the
vector from the fragment to the light source and the fragment's normal
vector. Optionally, a specular highlight can be added on top. The
relative contributions to the cool and warm colors by the diffuse color
are controlled by the alpha and beta properties respecitvely."""
The TLDR: the shader works well for revealing 3d details of objects
which may otherwise be hidden due to the scene's lighting. Ultimately,
it's an easier material to work with as you don't need to worry
about setting up appropriate scene lighting in order to visualise features.
Offers the same functionality as the Random points inside polygons
algorithm, and in addition it includes (possible to opt-out) the attributes
from the containing polygon and the ability to specify a seed for the random
number generator.
Could replace the Python algorithm Random points inside polygons, but
this C++ implementation only supports "Points count" ("number of points
for each feature") directly, while "Points density" is supported by allowing the
point count to be data defined (using the polygon area to calculate the
number of points).
