fix windows vs unix path insanity

export_compdb.sh

@@ -1,8 +1,5 @@
 srcs=src/*
-working_dir=$pwd
 
 echo [ > compile_commands.json
-
-find src -iname "*.cpp" -exec sh -c 'echo { \"directory\": \"$(pwd)\", \"command\": \"cl {} -I inc -Od -std:c++20 -Fo\", \"file\": \"{}\" }, >> compile_commands.json' \;
-
+find src -iname "*.cpp" -exec sh -c 'echo { \"directory\": \"$(cygpath -m $(pwd))\", \"command\": \"cl "$(cygpath -m {})" -I inc -Od -std:c++20 -Fo\", \"file\": \"$(cygpath -m {})\" }, >> compile_commands.json' \;
 echo ] >> compile_commands.json

inc/rand.h

@@ -14,5 +14,5 @@ inline void xorshift64(uint64_t &state) {
 // returns a random value between -1 and 1. modifies seed
 inline float norm_rand(uint64_t &state) {
   xorshift64(state);
-  return (state - half_max) / half_max;
+  return static_cast<float>(state - half_max) / static_cast<float>(half_max);
 }