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Targeting correction: reticle = TORSO BORESIGHT, not a free mouse cursor (task #39)

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Colleague flagged that targeting is torso-locked with no fine cursor.
Correct: the pod stick's yaw drove the TORSO TWIST
(MechControlsMapper -> HUD::SetFreeAimSlew(stick_x) @cockpit+0x28C,
gated on torso-horizontal-enabled; hud.hpp:167) and reticlePosition
@HUD+0x1FC is COMPUTED by HudSimulation from the mech pose quaternion +
target geometry, zeroed to centre with no target (part_013.c:5680) --
never a free-floating cursor. The engine Reticle struct is general
(shared with Red Planet); BT drives it from the torso boresight.

Fix:
- Removed the mouse-cursor slew (a mis-sourced stand-in from the
  RP-shared struct). The crosshair is now the torso boresight:
  BTTwistToReticleX(torsoTwist) = tan(twist) projected through the live
  per-axis projection. Dead-centre on the fixed-torso BLH
  (TorsoHorizontalEnabled=0); you aim by steering the whole mech.
- BT_AIM="x y" retained as the headless test harness.

Verified: face-to-face spawn -> HOT lock + aimed zone hits (36);
BT_FORCE_TURN circling -> 31 no-target vs 1 HOT (steering off-target
drops the lock, as it must). KB swept (combat-damage / gauges-hud /
open-questions); checkctx CLEAN.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-08 23:29:42 -05:00
co-authored by Claude Fable 5
parent 24ea7f13af
commit a8a56c57c9
5 changed files with 82 additions and 81 deletions
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engine/MUNGA_L4/L4VIDEO.cpp
+14
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@@ -165,6 +165,20 @@ void BTClientToReticle(float mx, float my, float cw, float ch,
*ry = y;
}
//
// Torso-twist angle (radians) -> reticle X (task #39): the crosshair marks
// where the torso guns point relative to the body-mounted view. A boresight
// ray at horizontal angle `twist` from forward hits camera-space
// xc = d*tan(twist) at depth d, so ndc_x = tan(twist)*P11 and
// rx = ndc_x * (vw/vh). Zero for a fixed torso (dead-centre boresight).
//
float BTTwistToReticleX(float twist_rad)
{
if (!gBTAimCamValid || gBTAimP11 <= 0.0f || gBTAimVpH <= 0.0f)
return 0.0f;
return (float)tan((double)twist_rad) * gBTAimP11 * (gBTAimVpW / gBTAimVpH);
}
//
// Crosshair (reticle coords) -> world pick ray. reticle -> NDC:
// ndc_x = rx * vh/vw (the reticle x unit is half the viewport HEIGHT),