- don't use Build utilities in the render backend.

source/build/include/build.h

@@ -288,15 +288,6 @@ int32_t md_definehud (int32_t modelid, int32_t tilex, FVector3 add,
 int32_t md_undefinetile(int32_t tile);
 int32_t md_undefinemodel(int32_t modelid);
 
-static vec2_t const zerovec = { 0, 0 };
-
-#define SET_AND_RETURN(Lval, Rval) \
-    do                             \
-    {                              \
-        (Lval) = (Rval);           \
-        return;                    \
-    } while (0)
-
 static inline int64_t compat_maybe_truncate_to_int32(int64_t val)
 {
     return enginecompatibility_mode != ENGINECOMPATIBILITY_NONE ? (int32_t)val : val;

source/core/sectorgeometry.cpp

@@ -158,7 +158,8 @@ public:
 			// To calculate the inverse Build performs an integer division with significant loss of precision
 			// that can cause the texture to be shifted by multiple pixels.
 			// The code below calculates the amount of this deviation so that it can be added back to the formula.
-			int len = ksqrt(uhypsq(ix2 - ix1, iy2 - iy1));
+			int x = ix2 - ix1, y = iy2 - iy1;
+			int len = int(sqrt(double(x) * x + double(y) * y));
 			if (len != 0)
 			{
 				int i = 1048576 / len;