Don't create empty tesselated faces layers in edit derivedmesh, these are
being created on the fly so this will conflicted, and use loop data for
opengl attributes for edit derivedmesh drawing.
old mesh MCol 'r' was blue, 'b' was red, but theres no reason to keep this for bmesh with MLoopCol.
Loading old files works, saving legacy format works too.
What wont work is loading a file after this revision and loading it in an older revision since the bmesh merge.
(it wont crash but the blue and red will be swapped on vertex color layers).
The DMSetDrawOptions[Tex] callbacks return 0 (skip), 1 (draw), or 2
(either stipple or skip mcols.) In the CDDM, EDDM, and CCGDM draw
functions, as well as the callbacks in drawmesh/drawobject, replace
these numbers with values from an enum, DMDrawOptions.
This function pointer's 'setDrawOptions' parameter took a slightly
different type than the other drawing callbacks. In particular, it
could set a 'drawSmooth' value to indicate that smoothing should
always be enabled, overriding the face flag. However, all callbacks
either did not set this value, or set it unconditionally to
1. Replaced this by adding a new 'flag' parameter to drawFacesMapped,
which can be set to DM_DRAW_ALWAYS_SMOOTH where appropriate.
Also removed the 'useColors' parameter and replaced it with another
flag value, DM_DRAW_USE_COLORS.
Removed the 'wpaint__setSolidDrawOptions' callback, was only being
used to set the shading to smooth.
It's currently not respecting the material color, probably since the
BMesh merge. There are a couple problems, both involving "dummy"
variables taking the place of actual MTFace/MCol data.
Code review: http://codereview.appspot.com/5753050/
- spelling - turns out we had tessellation spelt wrong all over.
- use \directive for doxy (not @directive)
- remove BLI_sparsemap.h - was from bmesh merge IIRC but entire file commented and not used.
Looks like it was missed BMesh element index for faces in emDM_drawMappedFacesMat.
There was already call of BM_mesh_elem_index_ensure to ensure there's element
index for vertices, added flag to ensure there's also index for faces.
These changes are to make the bmesh api more consistent and easier to learn, grouping similar functions which is convenient for autocomplete.
This uses similar convention to RNA.
* use face/loop/edge/vert as a prefix for functions.
* use 'elem' as a prefix too for functions that can take any type with a BMHeader.
* changed from camel case to underscore separated (like RNA).
- drawing face normals was broken (using wrong index).
- drawing flat faces in solid mode would display ugly tesselation normals (as if the model was made of triangles).
- drawing smooth faces in solid mode would show vertex normals based on tesselation (heavily slant in 1 direction).
now the normals are calculated and stored per polygon (will save some memory too for non tri meshes).
possiblem, this has to guess when the size is too big so as to re-
well.
If this isnt done, then the number of faces is used to allocate the
initial array to at least avoid many small allocs.
added BLI_array_reserve() to reserve elements and avoid reallocing many
small arrays when the loop starts.
- made editbmesh_calc_modifiers() ensure tessfaces, this has the advantage that if the tessfaces are already created they wont get re-made as was happening before.
