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Edit doxy files and header guards only.
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There are now 3 categories in the overlay popover:
- Navigation
- Active (camera, lamp... etc)
- Tool (manipulator)
The user preference for mini axis now controls if the mini axis
displays minimal or a full-interactive widget.
Part of design: T55863
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Internally it's still mostly named lamps, though some modules like Cycles
were already calling them lights.
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Rename to 'transform' since this controls interaction.
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Manipulators which aren't explicitly activated via tools are now hidden.
Tool manipulators are kept because it doesn't make sense to interact
with a tool with hidden manipulators.
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This reverts commit 33e45658ebc2a79acda259f7be748ad64780e982.
No longer needed.
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The implementation is pretty straightforward.
In Cycles, sampling the shapes is currently done w.r.t. area instead of solid angle.
There is a paper on solid angle sampling for disks [1], but the described algorithm is based on
simply sampling the enclosing square and rejecting samples outside of the disk, which is not exactly
great for Cycles' RNG (we'd need to setup a LCG for the repeated sampling) and for GPU divergence.
Even worse, the algorithm is only defined for disks. For ellipses, the basic idea still works, but a
way to analytically calculate the solid angle is required. This is technically possible [2], but the
calculation is extremely complex and still requires a lookup table for the Heuman Lambda function.
Therefore, I've decided to not implement that for now, we could still look into it later on.
In Eevee, the code uses the existing ltc_evaluate_disk to implement the lighting calculations.
[1]: "Solid Angle Sampling of Disk and Cylinder Lights"
[2]: "Analytical solution for the solid angle subtended at any point by an ellipse via a point source radiation vector potential"
Reviewers: sergey, brecht, fclem
Differential Revision: https://developer.blender.org/D3171
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Mostly internal changes, keeping both manipulators
could have worked but there was no point long term.
There are still some glitches to resolve, will work on those next.
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Make cage2d 'part' defines public (needed to assign operator actions).
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A single manipulator could only assign a single operator to each part.
Now each part can have it's own.
Also modify 2D selection callback, 2D started at 1, 3D at 0.
Now use -1 for unset value, start both at 0.
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Some manipulators are used like on-screen buttons,
in this case it doesn't make sense to keep track of their state,
so zero the offset when its unused.
Needed for lamp-target manipulator.
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Use for lamp-target, makes it easier to click on.
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Also disable lamp-target for cameras (might enable later).
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- New manipulator tracks lamps to position under cursor.
- Works with multiple lamps, keeping relative offsets.
- Holding Ctrl moves the lamp.
- Access via manipulator or Shift-T.
Code could be improved, but like to get feedback from users.
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Note there are issues clamping & updating,
will resolve as part of changes to cage2d widget.
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Also minor cleanuup, assign new vars for manipulator group.
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