Add missing d_bg_* TUs (#3058)

* Implement d_bg_s_capt_poly

* Add d_bg_s_func

* Ad d_bg_w_deform

* Add empty source file for d_bg_w_hf

src/d/d_bg_s_capt_poly.cpp

@@ -0,0 +1,30 @@
+#include "d/dolzel.h" // IWYU pragma: keep
+
+#include "d/d_bg_s_capt_poly.h"
+
+#include "JSystem/JUtility/JUTAssert.h"
+
+dBgS_CaptPoly::dBgS_CaptPoly() {
+    SetPolyPassChk(GetPolyPassChkInfo());
+    SetGrpPassChk(GetGrpPassChkInfo());
+    field_0x48 = 0;
+}
+
+void dBgS_CaptPoly::Set(cXyz& min, cXyz& max) {
+    aab.Set(&min, &max);
+
+    JUT_ASSERT(36, !(fpclassify(min.x) == FP_QNAN));
+    JUT_ASSERT(37, !(fpclassify(min.y) == FP_QNAN));
+    JUT_ASSERT(38, !(fpclassify(min.z) == FP_QNAN));
+    JUT_ASSERT(39, !(fpclassify(max.x) == FP_QNAN));
+    JUT_ASSERT(40, !(fpclassify(max.y) == FP_QNAN));
+    // BUG: Assertion on wrong cXyz member (should be max.z)
+    JUT_ASSERT(41, !(fpclassify(max.y) == FP_QNAN));
+
+    JUT_ASSERT(45, -INF < min.x && min.x < INF);
+    JUT_ASSERT(46, -INF < min.y && min.y < INF);
+    JUT_ASSERT(47, -INF < min.z && min.z < INF);
+    JUT_ASSERT(48, -INF < max.x && max.x < INF);
+    JUT_ASSERT(49, -INF < max.y && max.y < INF);
+    JUT_ASSERT(50, -INF < max.z && max.z < INF);
+}

src/d/d_bg_s_func.cpp

@@ -0,0 +1,6 @@
+#include "d/dolzel.h" // IWYU pragma: keep
+
+static void dummy() {
+    ((dBgS*)NULL)->GetMtrlSndId(*(const cBgS_PolyInfo*)NULL);
+}
+

src/d/d_bg_w_deform.cpp

@@ -0,0 +1,7 @@
+#include "d/dolzel.h" // IWYU pragma: keep
+
+static void dummy() {
+    ((J3DModel*)NULL)->offFlag(0);
+    ((J3DModel*)NULL)->onFlag(0);
+    ((J3DVertexBuffer*)NULL)->getCurrentVtxPos();
+}

src/d/d_bg_w_hf.cpp

@@ -0,0 +1,11 @@
+#include "d/dolzel.h"  // IWYU pragma: keep
+
+#include "d/d_bg_w_sv.h"
+
+// need to pull in dBgWSv RTTI somehow but not sure if this is correct
+class dBgWHf : public dBgWSv {
+};
+
+static void dummy() {
+    dBgWHf dummy;
+}