Aaron Fenyes
b289d2d4c3
Distinguish odd layer counts in debug mode
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The low-curvature construction admits odd layer counts.
2024-09-08 23:31:48 -07:00
Aaron Fenyes
163361184b
Ray-caster: avoid roundoff error in quadratic equation
2024-09-08 23:00:28 -07:00
Aaron Fenyes
ab830b194e
Use circles in triangle as low-curvature construction
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In the process, add a way to build a sphere by offset and curvature.
2024-09-06 19:01:18 -07:00
Aaron Fenyes
3493a798d1
Add low-curvature construction
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Also add infrastructure for switching between constructions.
2024-09-04 16:27:28 -07:00
Aaron Fenyes
121934c4c3
Encapsulate construction
2024-09-04 12:58:55 -07:00
Aaron Fenyes
a4236a34df
Ray-caster: dim the interior layers of spheres
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This seems to weaken the intersection disk illusion.
2024-09-02 15:15:18 -07:00
Aaron Fenyes
f148552964
Ray-caster: only draw the top few fragments
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This seems to increase graphics pipe use from 50--60% to 55--65%.
2024-08-29 15:01:38 -07:00
Aaron Fenyes
6db9f5be6c
Enlarge the test construction to six spheres
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In debug mode, assign most of the color scale to even layer counts. Odd
layer counts are topologically prohibited, so we should rarely see bugs
severe enough to produce them.
2024-08-28 17:14:55 -07:00
Aaron Fenyes
3a721a4cc8
Ray-caster: enlarge the construction data uniforms
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No noticeable effect on GPU performance.
2024-08-28 16:06:33 -07:00
Aaron Fenyes
8fde202911
Ray-caster: drop unused depth-pair array
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This doesn't affect GPU performance noticeably, so benchmarks before and
after the change should be comparable.
2024-08-28 15:52:19 -07:00
Aaron Fenyes
4afc82034b
Ray-caster: sort fragments while shading
2024-08-28 14:37:29 -07:00
Aaron Fenyes
e80adf831d
Ray-caster: correct hit detection
2024-08-28 01:59:46 -07:00
Aaron Fenyes
3d7ee98dd6
Ray-caster: check layer count
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In debug mode, show the layer count instead of the shaded image. This
reveals a bug: testing whether the hit depth is NaN doesn't actually
detect sphere misses, because `sphere_cast` returns -1 rather than NaN
to indicate a miss.
2024-08-28 01:55:46 -07:00
Aaron Fenyes
c04e29f586
Reduce the frame interval sample frequency
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At the higher frequency we were using earlier, the overhead from
updating the readout contributed significantly to the frame interval.
2024-08-28 01:47:38 -07:00
Aaron Fenyes
01c2af6615
Rotate and translate construction
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In the process, write code to make updates that depend on the time
between frames.
2024-08-27 18:39:58 -07:00
Aaron Fenyes
a40a110788
Ray-caster: only draw when the scene is changed
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This is how I typically schedule draw calls in JavaScript applications.
The baseline CPU activity for the display prototype is now in line with
other pages (though perhaps a bit higher), and the profiler shows little
time being spent in draw calls, even when I'm continually moving a
slider. The interface feels pretty responsive overall, although the
sliders seem to be lagging a bit.
2024-08-27 13:55:08 -07:00
Aaron Fenyes
f62f44b5a7
Optimization: decouple internal and uniform SPHERE_MAX
2024-08-27 00:00:48 -07:00
Aaron Fenyes
ec48592ef1
Ray-caster: add a frame time monitor
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It's time to start optimizing. Frame time is easy to measure, and we can
use it to gauge responsiveness.
2024-08-26 23:39:51 -07:00
Aaron Fenyes
5e9c5db231
Ray-caster: switch from draw effect to animation loop
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This wastes a lot of CPU time, as explained on lines 253--258 of
`main.rs`, but it's better than the previous version, which could block
graphics updates system-wide for seconds on end.
2024-08-26 16:06:37 -07:00
Aaron Fenyes
bf140efaf7
Ray-caster: remove hard-coded test construction
2024-08-26 13:51:01 -07:00
Aaron Fenyes
cbec31f5df
Ray-caster: pass colors in through uniforms
2024-08-26 13:41:34 -07:00
Aaron Fenyes
b9370ceb41
Ray-caster: label controls
2024-08-26 01:47:53 -07:00
Aaron Fenyes
85db7b9be0
Ray-caster: pass the sphere count as a uniform
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In the process, start exploring array size limits of various kinds.
2024-08-26 00:58:20 -07:00
Aaron Fenyes
c5fe725b1b
Ray-caster: automate getting uniform array locations
2024-08-25 22:22:14 -07:00
Aaron Fenyes
5bf23fa789
Ray-caster: pass spheres in through uniforms
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Keep the hard-coded spheres for comparison.
2024-08-25 21:40:59 -07:00
Aaron Fenyes
206a2df480
Ray-caster: add a third test sphere
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This helps confirm that the generalized depth-sorting is working.
2024-08-25 16:41:31 -07:00
Aaron Fenyes
c18cac642b
Ray-caster: generalize depth sorting
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Switch from a hard-coded sorting network for four fragments to an
insertion sort, which should work for any number of fragments.
2024-08-25 00:47:36 -07:00
Aaron Fenyes
8798683d25
Ray-caster: store sphere data in arrays
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This is a first step toward general depth sorting.
2024-08-25 00:00:28 -07:00
Aaron Fenyes
b9587872d3
Ray-caster: don't bother clearing the screen
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The ray-caster triangles cover the whole viewport, so they'll completely
overdraw the previous frame.
2024-08-24 11:31:22 -07:00
Aaron Fenyes
766d56027c
Ray-caster: move shaders to separate files
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This properly reflects the modularity of the code, and it simplifies
indentation and syntax highlighting.
2024-08-24 11:27:19 -07:00
Aaron Fenyes
25da6ca062
Ray-caster: adjust opacity of highlighting
2024-08-24 11:08:31 -07:00
Aaron Fenyes
e3df765f16
Ray-caster: highlight intersections and cusps
2024-08-24 01:38:06 -07:00
Aaron Fenyes
f1029b3102
Ray-caster: map output into sRGB space
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Change the base color and default opacity to keep the picture looking
broadly the same.
2024-08-24 01:05:19 -07:00
Aaron Fenyes
87763fc458
Ray-caster: tidy up sphere shading
2024-08-24 00:29:11 -07:00
Aaron Fenyes
2ef0fdd3e2
Ray-cast two spheres, with hard-coded depth sorting
2024-08-23 12:56:54 -07:00
Aaron Fenyes
d2cecf69db
Ray-cast a translucent sphere
2024-08-23 00:16:41 -07:00
Aaron Fenyes
c78a041dc7
Write a ray-caster for inversive spheres
2024-08-22 22:08:34 -07:00
Aaron Fenyes
f274119da6
Enable depth testing
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To get the right order, flip the sign of the `z` component in the output
of the projection map.
2024-08-22 18:17:01 -07:00
Aaron Fenyes
1fbeb23194
Add rotation control
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In the process, find and correct an error in the --+ vertex, which was
miswritten as ---.
2024-08-22 00:04:58 -07:00
Aaron Fenyes
80b210e667
Make the projection map a uniform
2024-08-21 23:07:14 -07:00
Aaron Fenyes
81f9b8e040
Find vertex attribute indices in advance
2024-08-21 22:36:56 -07:00
Aaron Fenyes
5885189b04
Draw a mesh in perspective, and in color
2024-08-21 17:31:17 -07:00
Aaron Fenyes
fd3cbae1b4
Get a WebGL canvas working in Sycamore
2024-08-21 13:01:33 -07:00
