Monorepo for Aesthetic.Computer
aesthetic.computer
arena: TEST — flip Z convention in hover raycast
Experimental: flip the sign on ray origin Z and ray direction Z to test
whether the engine's Z-forward convention is reversed from what the
derivation assumed. If the hover highlight now lands on the correct tile,
we've isolated the mismatch. To revert: un-negate camWorldZ and fz.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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system/public/aesthetic.computer/disks/arena.mjs
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system/public/aesthetic.computer/disks/arena.mjs
···
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lastHitWorld = null;
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lastPenScreen = penLocked ? null : [mx, my];
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if (fy < -0.001) {
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// Ray origin = render camera world position (not the logical player, so
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// the hit point matches what the user sees through the crosshair/mouse).
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// EXPERIMENT: Z convention flip test. If the raycast hits the wrong tile
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// mirrored across the player, flipping Z in both ray origin AND direction
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// is a point reflection across the XY plane through origin. If this
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// makes the hover tile correct, we know Z-axis in engine is inverted
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// from what my derivation assumed. (Direction-only or origin-only flips
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// would not cause a clean mirror; we need both or neither.)
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const camWorldX = -cam.x;
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const camWorldY = -cam.y;
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const camWorldZ = -cam.z;
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const camWorldZ = cam.z; // was -cam.z (flipped)
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const fzAdj = -fz; // flipped direction
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const t = (GROUND_Y - camWorldY) / fy;
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if (t > 0 && t < 200) {
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const hitX = camWorldX + t * fx;
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const hitZ = camWorldZ + t * fz;
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const hitZ = camWorldZ + t * fzAdj;
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hoverTile = tileAt(hitX, hitZ);
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lastHitWorld = [hitX, hitZ];
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}