Orkuncakilkaya
f7f47152bd
scrollingDeltaY is a double and the Cocoa event pump truncated it to an int per EVENT before accumulating. A trackpad or a Magic Mouse sends a stream of fractions of a line, every one of which truncated to zero, so the wheel was dead; a notched mouse sends three to ten lines at once, so it jumped. The fraction is accumulated now, a precise delta is scaled from points to notches, and the remainder carries to the next frame. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
39 lines
2.7 KiB
Markdown
39 lines
2.7 KiB
Markdown
bump: minor
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type: feat
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Three things a crown and a hand light were getting wrong.
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**An aspen's trunk quaked with its leaves.** `layer_flutter`'s mask was the vertex's
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HEIGHT alone — anything more than 1.2 m up trembled — so on a ten metre aspen the whole
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bole moved, and a tree that is supposed to shiver read as a column of cloth. What
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separates a leaf from a bole is not height, it is distance from the model's own centre
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line: the leaves are out at the edge of the crown and the trunk is on the axis. The mask
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is radial now, and small plants keep the old one, because a flower is all leaf.
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**Foliage in the camera's face.** A third-person camera walks into a crown and the branch
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between it and the body is an opaque wall a metre from the lens; in first person it is the
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whole screen. `#define NEAR_FADE` dithers tree foliage out inside arm's length of the
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camera — in the depth PREPASS, so the lit pass never sees those pixels either and the
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equal-depth optimisation is untouched. `gl_Position.w` is the view depth for a perspective
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projection, so it costs one varying and no uniform. Blades, cards and flowers are left
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alone on purpose: they live at the player's feet, they are always that close, and fading
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them opens a hole in the meadow. Nor is the BOLE ever faded: a trunk and its needle cards
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are one mesh drawn by one program, so the first cut dissolved the trunk into a dither
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pattern as you walked up to it - a solid tree you can see through reads as a fault, where
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a branch getting out of your way reads as the camera being polite. The mask is the same
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signal the quake uses. The shadow pass keeps every leaf, or a tree would stop shading the
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ground it stands on as you walked up to it.
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**A hand light had the reach of a candle, whatever it was meant to be.** `handLight`'s
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falloff was an inverse square windowed off between 26 and 6 metres, with both numbers
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hard-coded: two per cent of its own near field by ten metres out, so carrying a torch at
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night lit your boots and nothing else. `daylight_hand` takes a `reach` in metres now and
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the falloff is a gentle power out to it — about nine tenths at a metre, half at half the
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reach, a tenth at nine tenths of it, nothing past it. A pool of light with a gradient in
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it rather than a hotspot with a cliff.
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**And the wheel on macOS did nothing, or everything.** `scrollingDeltaY` is a double, and
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the Cocoa event pump truncated it to an int PER EVENT before accumulating: a trackpad or a
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Magic Mouse sends a stream of fractions of a line, every one of which truncated to zero, so
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the wheel was dead; a notched mouse sends three to ten lines at once, so it jumped. The
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fraction is accumulated now, a precise delta is scaled from points to notches, and the
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remainder carries to the next frame - one gesture, one step, on both kinds of mouse.
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