- added conversion macros to convert floating point angles to angle_t, using xs_Float.h, and replaced all occurences in the code with them (let's hope I found everything.)

Converting a floating point value that is out of range for a signed integer will result in 0x80000000 with SSE math, which is used exclusively for this purpose on modern Visual C++ compilers, so this cannot be used anywhere.
On ARM there's problems with float to unsigned int conversions.

xs_Float does not depend on these

src/c_cmds.cpp

@@ -1236,3 +1236,16 @@ CCMD(secret)
 		}
 	}
 }
+
+CCMD(angleconvtest)
+{
+	Printf("Testing degrees to angle conversion:\n");
+	for (double ang = -5 * 180.; ang < 5 * 180.; ang += 45.)
+	{
+		angle_t ang1 = FLOAT2ANGLE(ang);
+		angle_t ang2 = (angle_t)(ang * (ANGLE_90 / 90.));
+		angle_t ang3 = (angle_t)(int)(ang * (ANGLE_90 / 90.));
+		Printf("Angle = %.5f: xs_RoundToInt = %08x, unsigned cast = %08x, signed cast = %08x\n",
+			ang, ang1, ang2, ang3);
+	}
+}