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#118: the eject slot graphic lands -- BitMapInverseWipeScalar reconstructed

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The operator's field report ("eject slot flashing but no graphic in it") was
the tracked-NULL bring-up stub in BallisticWeaponCluster. Reconstructed the
missing gauge class from the binary:

- BitMapInverseWipeScalar @004c61c8 (vtable 0x518a14; base @004c5e84,
  Execute @004c5fb8, BecameActive @004c5fa4): a bitmap COLUMN SWEEP whose
  level tracks a live Scalar -- two spans with INVERTED colour pairs,
  [0..level] fg colorA / bg colorB, remainder the inverse.
- Wired per the binary call site (part_014.c:2312): bteejtm.pcc at (0xF,0)
  on the weapon's eng port, colours 0/0xFF, watching the weapon's
  PercentOfEject (@0x3F8, the round-eject 0..1 progress) via a new
  complete-type bridge BTWeaponPercentOfEjectPtr (databinding rule).

At idle (level 0) the EJECT graphic now renders in the slot; during a
round-eject cycle it sweeps with the countdown. BTEEJTM.PCC ships in
content/GAUGE (the loose gauge bitmap set). Smoke-tested: constructs clean.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Joe DiPrima
2026-08-03 17:53:33 -05:00
co-authored by Claude Fable 5
parent 611b1a8bbd
commit 751b1159b5
5 changed files with 156 additions and 5 deletions
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game/reconstructed/btl4gaug.cpp
+95
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@@ -2152,6 +2152,101 @@ void BitMapInverseWipe::Execute()
}
//###########################################################################
// BitMapInverseWipeScalar @004c61c8 ctor / @004c5fb8 Execute
//###########################################################################
//
// The weapon-eng round-EJECT progress sweep (bteejtm.pcc <- PercentOfEject).
// Base ctor @004c5e84 interns the image and captures colours + the bitmap
// geometry; the @004c61c8 tail adds the Scalar value-watcher (FUN_00474855
// into this+0xA8) -- our GaugeConnectionDirectOf<Scalar> is that watcher.
//
BitMapInverseWipeScalar::BitMapInverseWipeScalar(
GaugeRate rate, ModeMask mode_mask, L4GaugeRenderer *renderer_in,
int owner_ID, int graphics_port_number, int x, int y, const char *image,
int color_a, int color_b, Scalar *value_pointer,
const char *identification_string
):
GraphicGauge(rate, mode_mask, renderer_in, owner_ID, graphics_port_number,
identification_string)
{
localView.SetOrigin(x, y);
imageName = new char[strlen(image) + 1];
strcpy(imageName, image);
colorA = color_a;
colorB = color_b;
value = 0.0f;
previousLevel = -1;
L4Warehouse *warehouse = (L4Warehouse *)renderer_in->warehousePointer;
BitMap *bmp = warehouse->bitMapBin.Get(imageName);
if (bmp == NULL)
{
width = 0;
height = 0;
}
else
{
width = bmp->Data.Size.x;
height = bmp->Data.Size.y;
}
AddConnection(new GaugeConnectionDirectOf<Scalar>(0, &value, value_pointer));
}
BitMapInverseWipeScalar::~BitMapInverseWipeScalar()
{
L4Warehouse *warehouse = (L4Warehouse *)renderer->warehousePointer;
warehouse->bitMapBin.Release(imageName);
delete[] imageName;
imageName = NULL;
}
Logical BitMapInverseWipeScalar::TestInstance() const { return GraphicGauge::TestInstance(); }
void BitMapInverseWipeScalar::BecameActive() // @004c5fa4
{
previousLevel = -1;
}
//
// @004c5fb8 -- Execute. level = round(value x width) clamped to [0, width]
// (the x87 form Ghidra drops -- fild width / fmul value, gotcha #19), and on
// a change draw the two column spans with INVERTED colour pairs: [0..level]
// fg colorA over bg colorB, [level+1..width] fg colorB over bg colorA.
//
void BitMapInverseWipeScalar::Execute()
{
Scalar scaled = value * (Scalar)width;
int level = (int)(scaled + (scaled < 0.0f ? -0.5f : 0.5f)); // FUN_004dcd94 round
if (level < 0) level = 0;
if (level > width) level = width;
if (level != previousLevel)
{
previousLevel = level;
L4Warehouse *warehouse = (L4Warehouse *)renderer->warehousePointer;
BitMap *bmp = warehouse->bitMapBin.Get(imageName);
if (bmp != NULL)
{
int split = level;
if (split != 0)
{
localView.MoveToAbsolute(0, 0);
localView.SetColor(colorA);
localView.DrawBitMap(colorB, bmp, 0, 0, split, height);
++split; // the binary's iVar2++
}
if (split < width)
{
localView.MoveToAbsolute(split, 0);
localView.SetColor(colorB);
localView.DrawBitMap(colorA, bmp, split, 0, width, height);
}
warehouse->bitMapBin.Release(imageName);
}
}
}
//###########################################################################
//###########################################################################
// HeadingPointer @004c554c Make / @004c562c ctor