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Range caret: the authentic 500 m/s slide (HudSimulation :5652-5670)

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The right-ladder caret reads range-to-pick, and with the world-pick
model the pick is usually the ground downrange -- so walking (cockpit
bob + turning sweeping the boresight across near/far terrain) made the
caret teleport frame to frame ("going all over the place", user
report). The binary rate-limits the DISPLAYED range: shown +=
clamp(true - shown, +-dt*500) -- a 500 m/s slide, applied in
HudSimulation, including toward the no-target 1200 default
(_DAT_004b7ed0 confirmed 0 = the abs() idiom). Implemented in mech4's
HUD feed where dt is in scope.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-09 07:47:28 -05:00
co-authored by Claude Fable 5
parent 305c928923
commit cb110310ba
1 changed files with 21 additions and 4 deletions
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game/reconstructed/mech4.cpp
+21 -4
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@@ -2437,6 +2437,13 @@ void
// a target with no damage zones gets neither).
{
extern void BTSetHudTargetRange(Scalar range);
// RANGE RATE LIMIT (HudSimulation :5652-5670 [T1]): the DISPLAYED
// range slides toward the true pick range at 500 m/s -- shown +=
// clamp(true - shown, +-dt*500) -- so the caret sweeps smoothly as
// the boresight crosses near/far ground instead of teleporting.
// (Applies to the no-target 1200 default too.)
static float sShownRange = 1200.0f;
float trueRange = 1200.0f; // no target: the binary default
Entity *des = MECH_TARGET_ENTITY(this);
if (des != 0 && des != hotTarget)
{
@@ -2444,7 +2451,7 @@ void
Point3D tp = MECH_TARGET_POS(this);
float hddx = tp.x - localOrigin.linearPosition.x;
float hddz = tp.z - localOrigin.linearPosition.z;
BTSetHudTargetRange((Scalar)sqrtf(hddx*hddx + hddz*hddz));
trueRange = sqrtf(hddx*hddx + hddz*hddz);
gBTHudLockState = 0;
}
else if (des != 0)
@@ -2453,7 +2460,7 @@ void
Point3D dp = dm->localOrigin.linearPosition;
float hddx = dp.x - localOrigin.linearPosition.x;
float hddz = dp.z - localOrigin.linearPosition.z;
BTSetHudTargetRange((Scalar)sqrtf(hddx*hddx + hddz*hddz));
trueRange = sqrtf(hddx*hddx + hddz*hddz);
gBTHudLockWorld[0] = dp.x; // the HOTBOX point: top-centre
gBTHudLockWorld[1] = dp.y + (float)dm->CylinderReferenceHeight();
gBTHudLockWorld[2] = dp.z;
@@ -2487,8 +2494,18 @@ void
}
else
{
BTSetHudTargetRange(1200.0f); // no target: the binary default
gBTHudLockState = 0; // (0x44960000 @part_013.c:5637)
gBTHudLockState = 0; // sky: no target (trueRange stays 1200,
} // the binary default @part_013.c:5637)
// the 500 m/s slide toward trueRange (see the banner above)
{
float maxStep = (float)dt * 500.0f;
if (maxStep < 0.0f) maxStep = -maxStep;
float step = trueRange - sShownRange;
if (step > maxStep) step = maxStep;
if (step < -maxStep) step = -maxStep;
sShownRange += step;
BTSetHudTargetRange((Scalar)sShownRange);
}
gBTHudHeading = gDriveHeading; // CompassHeading (attr 0xD)