Now that the 3d grid is infinite, antialiased, not occluded, and overlaid
on top of rendered view, being able to decrease its opacity to reduce
visual strain is a must.
Make edge decoration a bit thinner and try to reduce missing edge segment
due to triangle barycentrics.
This invert the "edge fix" strip offset direction, meanning there is now
the possibility that these triangles poke through nearby geometry depending
on the viewport near/far clips distances.
Support for showing images in background/foreground and only in perspective/orthographic view.
Internally the depth of the image is modified in the fragment shader by setting `gl_FragDepth` explicitly.
The UI still needs some work to improve usability, see D3863 for details.
Currently there is one duplicated function, not sure how to best deduplicate it yet. (`is_image_empty_visible`)
Reviewer: fclem, brecht, campbellbarton
Differential Revision: https://developer.blender.org/D3863
2.7x was displaying 2 additional subdivision for theses views. Bumping to 3
just to say we improved it!
Hypothetically it can be increased as much as we want but float precision
can quickly become an issue.
As it turned out the issue wasn't that we were drawing only the active,
but that the "object mode" lattice drawing was drawing on top of the
drawing for all the edit mode lattice objects.
We are doing the same original behaviour for curves and even meshes. To be
investigated if it is ok for those other cases.
First problem is that enabling the "in front" option made the wire object
test against an not updated stencil buffer.
Second problem is that the "in front" option was useless on wire objects.
To fix this we bypass the depth test and live with some sorting problem.
This brings a big difference to meshes with edit cage adjusted for modifiers.
In my tests, the suzanne with subdivision modifier level 3 went from 4.80ms to 3.05ms.
By the tests I could only observe a considerable difference in the peformanse when the vertex size is 30.
Vertice 3 showed no difference in a suzzane with subdivision modifier level 3 + show-on-cage.
Point Size 30: 7.29ms vs 2.55ms
Reviewers: fclem
Reviewed By: fclem
Differential Revision: https://developer.blender.org/D3805
On my test it's 30% faster than before.
Test case : Suzanne, subsurf lvl3, 64K tris, Edge select mode for fair
comparison.
0.95ms before optimization
0.64ms after optimization
Note that this only optimize the "nicest" display of edit mesh overlays,
not the one when rotating the view where half of the border edges are
missing.
... display vertex even when occluded.
Add back the vertex display because occluded vertex are not visible when
the triangle is almost parallel to the view.
The problem with the barycentric coord is that they are hard to work with
and their derivatives not enough precise to compute the vertex positions.
So we need to pass the vertices scree positions down to the fragment shader.
This decouple the vertex display from the face+edges.
This is to reduce the number of triangles required to fix the edges
artifacts (aliasing) and increase viewport reactivity when not actively
navigating (ie. mouse scroll).
Also it makes all vertices visible (not cut-off) even when navigating.
However it makes the navigation drawing a bit slower because it has to
render twice.
Also add a depth bias to the wires to avoid depth fighting when previewing
final mesh (modifiers applied).
Includes the following fixes
- Fix smoke texture creation: data was interpreted as Byte instead of Floats.
- Fix Velocity texture not being free after draw: also was causing crashes.
- Fix display_thickness not being copied during COW.
- Fix Blending and general volume rendering algorithm.
- Add Volume Shadowing support.
Add an option to display contour lines tracing through points with the
same interpolated weight value in weight paint mode. This can be useful
for working on gentle gradients over a relatively high resolution mesh,
where the difference in color between adjacent vertices is very small.
The contour grid has 3 levels of detail going down to step 0.001,
which automatically fade in or out based on the weight gradient.
Fade out works by capping both screen space and weight space line
width, and reducing alpha when the screen space width becomes too
small for moire and noise-less rendering.
Reviewers: fclem
Differential Revision: https://developer.blender.org/D3749
Avoid accessing object mode via the view layer active object
when drawing since it's done everywhere we store the active object mode
in the draw-context.
Users can select the main unit they want to use now.
Previously the displayed unit always depended on the magnitude of the value.
The old behavior can be restored by switching to the "Adaptive" mode for length, mass and time units.
Meters, kilograms and seconds are the default units for new and old scenes.
The selected unit is also the default unit for user input.
E.g. if cm is selected, whenever the user inputs a unitless number into a field of type length, it will be interpreted as cm.
Reviewer: brecht
Differential: https://developer.blender.org/D3740
