Address review feedback: replace the long conjunction guards added in the
previous commit with early-return statements for readability. Hoist the
legendConfig pointer into a local so the body reuses it instead of calling
legendConfig() repeatedly.
Mirror the nullptr guards added to RimContourMapProjection::generateGeometryIfNecessary
(commit fdc8608a29) in the three sibling RimEclipseContourMapView and
RimGeoMechContourMapView "append ... to model" methods, which were still
unconditionally dereferencing mapGrid() and legendConfig()->scalarMapper().
Extract and clean up prototype from contour-map-01 branch:
- RivContourMapProjectionPartMgr: add appendProjectionAsTexturedQuad(),
createSingleTexturedQuadPart(), createXYPlaneQuadGeoWithTexCoords(),
and createTexture() — renders the map as a single GPU-textured quad
with transparency (alpha=0) for undefined/infinity cells
- RimContourMapProjection: add m_showTextureImage (default true) and
m_showTrianglesWithColor (default false) PDM fields; guard triangle
mesh generation when showTrianglesWithColor() is false
- RimEclipseContourMapView, RimGeoMechContourMapView: branch
appendContourMapProjectionToModel() to use texture or triangle path
based on the new flags; Statistics view inherits Eclipse path
Prototype dead code (debug file save, SurfaceEffectGenerator fallback,
redundant createImage()) not carried forward.