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This changes a bit the batches data structure. Instead of using one
vbo per material we use one for all material and use index buffers for
selecting the correct triangles.
This is less optimized than before but has potential to become more
optimized by merging the wireframe data vbo into the shading one.
Also the index buffers are not strictly necessary and could be just
ranges inside the buffer. But this needs more adding things inside
GPUIndexBuf.
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Shaded triangles are not yet implemented (request from gpumaterials).
This also changes the mechanism to draw curve normals to make it not
dependant on normal size display. This way different viewport can
reuse the same batch.
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This also do some renaming/cleanups.
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The shader is way simpler and run way faster on lower end hardware
(2x faster on intel HD5000) but did not notice any improvement on AMD Vega.
This also adds a few changes to the way the wireframes are drawn:
- the slider is more linearly progressive.
- optimize display shows all wires and progressively decrease "inner" wires
intensity. This is subject to change in the future.
- text/surface/metaballs support is pretty rough. More work needs to be done.
This remove the optimization introduced in f1975a46390a5bf85bb7012375f9bc1e761fc516.
This also removes the GPU side "sharpness" calculation which means that
animated meshes with wireframe display will update slower.
The CPU sharpness calculation has still room for optimization. Also
it is not excluded that GPU calculation can be added back as a
separate preprocessing pass (saving the computation result [compute or
feedback]).
The goal here was to have more speed for static objects and remove
the dependency of having buffer textures with triangle count. This is
preparation work for multithreading the whole DRW manager.
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This only happens after a certain threshold.
We sort triangles into 2 bins (start and end of the buffer) based on a
threshold and just draw the start bin if the wireframe slider is low enough.
This optimization is disabled for deformed meshes.
This should help resolve (to some extent) T58188.
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It's so similar in practice that we don't need a separate engine for edit
surface overlays.
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Now handles are drawn using index buffer instead of duplicating memory
requirement.
Also make use of shader tricks to draw handles antialiased, and respond to
UI scalling.
Make vertex point match edit mesh vertex size.
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This commit add one regression: it is impossible to currently hide handles
in the viewport. But this should be fixed in another commit.
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The visuals was already implemented but we could not toggle them off.
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Render engine
Same problem as previous commit, but now in `drawobject.c`.
Also added a comment to the equivalent line in `draw_cache_imp_curve.c`.
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`normal_len` did not follow the value of the loop that is executed to add the vertices, being different from the vbo size
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there is no index
This prevents possible errors with materials and a crash with low resolution metaball.
Also a small cleanup was done in the code.
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They were discarded when shaded surfaces were requested thus bringing glitches to the outline of the selected Displists Objects
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property is changed
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Wee must return VertBuffers even when its size is zero
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Text
**ToDo:**
- add vertbuff for UV (what can be adapted from `dl_surf_to_renderdata`)
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Use ownership flags instead.
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Use consistent prefix for gawain API names as well as
some abbreviations to avoid over-long names, see: D2678
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Some names are a bit arbitrary,
this makes it clear which names are VBO attributes.
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Creating draw-cache should only ever be used by the draw-manager.
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