Widescreen: keep original size, extend view horizontally; fix player/camera

- Default render size is 768 high and as wide as the monitor aspect
  (1835x768 on 3440x1440), scaled up: everything keeps the size players
  know and the view only grows sideways. Height=0 keeps native 1:1.
- Ground: 818/888 clip limits, screen centre floats and integer
  immediates, ground quad list (capped at 1749) moved with the tile list.
- 3D: cGranny ortho (+-512 x +-384, incl. HUD items) scaled; inverse
  projection 0x623a20 (1/1024, 1/768) follows the render size, which fixes
  the camera following the player ("outside world") and the missing
  player / ESC menu.
- tools: game-input.ps1 + autotest-load.ps1 drive the game (load the first
  save game, screenshots in-game and with the ESC menu).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/game/addresses.h

@@ -43,6 +43,42 @@ constexpr uint32_t kViewHeightUsers[] = {
     0x0062ea5e, 0x0062f345, 0x0063068a, 0x00630f77,
 };
 
+// More screen constants the world view reads (float, `f... dword ptr [addr]`).
+constexpr uint32_t kScreenHalfWidthF = 0x0088e6fc;  // float 512.0 (screen centre x)
+constexpr uint32_t kScreenHalfHeightF = 0x0088e9f0;  // float 384.0 (screen centre y)
+constexpr uint32_t kGroundClipBottomF = 0x0089011c;  // float 818.0 (768 + 50)
+constexpr uint32_t kClipBottom888F = 0x00890124;  // float 888.0 (768 + 120)
+constexpr uint32_t kViewHalfWidthUsers[] = {
+    0x0062b485, 0x0062dc83, 0x0062e37c, 0x0062e960, 0x0062e989, 0x0062efd8, 0x0062eff2,
+    0x0063058a, 0x006305b5, 0x00630c08, 0x00630c22, 0x00632032, 0x0063205c,
+};
+constexpr uint32_t kViewHalfHeightUsers[] = {
+    0x006252fe, 0x00625341, 0x0062b4be, 0x0062dcbe, 0x0062e390, 0x0062e996, 0x0062e9a2, 0x0062f002,
+    0x0062f00e, 0x006305c2, 0x006305ce, 0x00630c2f, 0x00630c3b, 0x0063206a, 0x0063207a,
+};
+// Outside the world view object, but drawing into the world: the zoom
+// transform around the screen centre in FUN_0041eaf0. (The 512/1024 in
+// cGranny::renderComplex case 9 are an effect animation, not the screen.)
+constexpr uint32_t kCreatureHalfWidthUsers[] = {0x0041ed2b, 0x0041ed35};
+constexpr uint32_t kCreatureHalfHeightUsers[] = {0x0041ed41, 0x0041ed4b};
+// Precomputed reciprocals of the screen size. 0x623a20 (screen -> view,
+// inverse of 0x623c40) uses 1/1024 and 1/768. Other users of these constants
+// are texel/time maths.
+constexpr uint32_t kScreenInvWidthF = 0x0088e710;  // float 1/1024
+constexpr uint32_t kScreenInvHeightF = 0x0089005c;  // float 1/768
+constexpr uint32_t kViewInvWidthUsers[] = {0x00623a49};
+constexpr uint32_t kViewInvHeightUsers[] = {0x00623a5f};
+constexpr uint32_t kGroundClipBottomUsers[] = {0x0062b464};
+constexpr uint32_t kClipBottom888Users[] = {0x0062dc62};
+
+// Screen centre as integer immediates (`add reg, 200h` / `mov reg, 200h` and
+// the matching 180h), in pairs x, y.
+constexpr uint32_t kCenterImmediates[][2] = {
+    {0x0062b4c6, 0x0062b4e9}, {0x0062cc40, 0x0062cc50}, {0x0062dcc6, 0x0062dce1},
+    {0x0062e398, 0x0062e3a9}, {0x0062f967, 0x0062f96d}, {0x0062fe60, 0x0062fe7d},
+    {0x006315aa, 0x006315b0}, {0x00631aca, 0x00631ae7}, {0x00631c53, 0x00631c70},
+};
+
 // cWorldView0 is allocated with `push 970F4h; call operator new` here.
 constexpr uint32_t kWorldViewAllocSizePush = 0x006101aa;
 constexpr uint32_t kWorldViewSize = 0x970f4;
@@ -53,11 +89,22 @@ constexpr uint32_t kWorldViewSize = 0x970f4;
 constexpr uint32_t kTileListOffset = 0x3ff2c;
 constexpr uint32_t kTileListEntrySize = 0x98;
 constexpr uint32_t kTileListUsers[] = {
-    0x0062b6d9, 0x0062b6ec, 0x0062b709, 0x0062b730, 0x0062b74b, 0x0062b763,  // writer, row renderer 0x62b000
+    0x0062b6d9, 0x0062b6ec, 0x0062b709, 0x0062b730, 0x0062b74b, 0x0062b763,  // writer, row renderer FUN_0062b000
     0x0062b777, 0x0062b797, 0x0062b7b7, 0x0062b7d7,
     0x0062df47, 0x0062e252,  // readers (lea base pointer)
 };
 
+// cWorldView0's ground quad list: 0x90-byte entries at +0xb64 plus a parallel
+// int array at +0x3e3c4, count at +0x3ff1c, capped at 0x6d5 (1749): beyond
+// that the last quad is overwritten, so the ground stops drawing.
+constexpr uint32_t kGroundQuadOffset = 0xb64;
+constexpr uint32_t kGroundQuadEntrySize = 0x90;
+constexpr uint32_t kGroundQuadIndexOffset = 0x3e3c4;
+constexpr uint32_t kGroundQuadCap = 0x6d5;
+constexpr uint32_t kGroundQuadCapCompare = 0x0062b603;  // cmp eax, 6D5h
+constexpr uint32_t kGroundQuadUsers[] = {0x0062b5e2, 0x0062d58e};  // lea [..+0B64h] / [..+0B7Ch]
+constexpr uint32_t kGroundQuadIndexUsers[] = {0x0062b5f6, 0x0062d588};  // [..+3E3C4h]
+
 // Ortho projection of the 3D models: x -267..267, y -200..200 world units
 // span the 1024x768 screen (times zoom). Doubles, read with `fmul qword ptr`.
 constexpr uint32_t kOrthoLeftD = 0x0088ee40;  // double -267.0
@@ -68,6 +115,7 @@ constexpr uint32_t kOrthoTopD = 0x0088ee58;  // double  200.0
 // World view instructions `fmul st, qword ptr [kOrtho*D]` (zoomed projection),
 // four per site, in the order top, bottom, right, left.
 constexpr uint32_t kOrthoZoomedUsers[][4] = {
+    {0x004b19c1, 0x004b19dc, 0x004b19ed, 0x004b19fe},  // FUN_004b1740, outside the view class
     {0x00624fdb, 0x00624ff3, 0x00625001, 0x0062500f},
     {0x00628355, 0x0062836d, 0x0062837b, 0x00628389},
     {0x0062852f, 0x00628547, 0x00628555, 0x00628563},
@@ -80,4 +128,13 @@ constexpr uint32_t kOrthoPushSequences[] = {
     0x0060c1f7, 0x0060da54, 0x00625039, 0x006283b3, 0x0062858d, 0x00628d3b,
 };
 
+// cGranny::render variants (3D creatures) project in screen pixels with an
+// ortho camera of x -512..512, y -384..384: 4 consecutive `push imm32` in the
+// order top (384), bottom (-384), right (512), left (-512).
+// The last one is cUI_NetGranny (3D items in the HUD, e.g. the belt). It must
+// be scaled too: game logic (0x44d9f0, camera target) converts world to screen
+// with whatever projection the device has, which is usually the HUD's, and
+// uses the (redirected) view width with it.
+constexpr uint32_t kGrannyOrthoPushSequences[] = {0x0040ebc9, 0x0040f5cf, 0x0040feff, 0x006f1ecb};
+
 } // namespace game::addr