Fix double builds

SConstruct

@@ -1,13 +1,21 @@
 #!/usr/bin/env python
 import os
 import sys
-
+from pathlib import Path
 from methods import print_error
 
+from SCons.Environment import Environment
+from SCons.Variables import Variables
+from SCons.Script import ARGUMENTS
 
 libname = "gdmotionmatching"
 projectdir = "addons/motion_matching"
+double_api_file = "godot-cpp/gdextension/extension_api_double.json"
 
+if ARGUMENTS.get("precision", "single") == "double":
+    ARGUMENTS["custom_api_file"] = double_api_file
+    print("Using double precision API file: {}".format(double_api_file))
+
 localEnv = Environment(tools=["default"], PLATFORM="")
 
 customs = ["custom.py"]

addons/motion_matching/gdmotionmatching.gdextension

@@ -11,16 +11,30 @@ macos.release = "bin/macos/macos.framework/libgdmotionmatching.macos.template_re
 ios.debug = "bin/ios/ios.framework/libgdmotionmatching.ios.template_debug"
 ios.release = "bin/ios/ios.framework/libgdmotionmatching.ios.template_release"
 windows.debug.x86_32 = "bin/windows/libgdmotionmatching.windows.template_debug.x86_32.dll"
+windows.debug.double.x86_64 = "bin/windows/libgdmotionmatching.windows.template_debug.double.x86_32.dll"
 windows.release.x86_32 = "bin/windows/libgdmotionmatching.windows.template_release.x86_32.dll"
+windows.release.double.x86_32 = "bin/windows/libgdmotionmatching.windows.template_release.double.x86_32.dll"
 windows.debug.x86_64 = "bin/windows/libgdmotionmatching.windows.template_debug.x86_64.dll"
+windows.debug.double.x86_64 = "bin/windows/libgdmotionmatching.windows.template_debug.double.x86_64.dll"
 windows.release.x86_64 = "bin/windows/libgdmotionmatching.windows.template_release.x86_64.dll"
+windows.release.double.x86_64 = "bin/windows/libgdmotionmatching.windows.template_release.double.x86_64.dll"
 linux.debug.x86_64 = "bin/linux/libgdmotionmatching.linux.template_debug.x86_64.so"
+linux.debug.double.x86_64 = "bin/linux/libgdmotionmatching.linux.template_debug.double.x86_64.so"
 linux.release.x86_64 = "bin/linux/libgdmotionmatching.linux.template_release.x86_64.so"
+linux.release.double.x86_64 = "bin/linux/libgdmotionmatching.linux.template_release.double.x86_64.so"
 linux.debug.arm64 = "bin/linux/libgdmotionmatching.linux.template_debug.arm64.so"
+linux.debug.double.arm64 = "bin/linux/libgdmotionmatching.linux.template_debug.double.arm64.so"
 linux.release.arm64 = "bin/linux/libgdmotionmatching.linux.template_release.arm64.so"
+linux.release.double.arm64 = "bin/linux/libgdmotionmatching.linux.template_release.double.arm64.so"
 linux.debug.rv64 = "bin/linux/libgdmotionmatching.linux.template_debug.rv64.so"
+linux.debug.double.rv64 = "bin/linux/libgdmotionmatching.linux.template_debug.double.rv64.so"
 linux.release.rv64 = "bin/linux/libgdmotionmatching.linux.template_release.rv64.so"
+linux.release.double.rv64 = "bin/linux/libgdmotionmatching.linux.template_release.double.rv64.so"
 android.debug.x86_64 = "bin/android/libgdmotionmatching.android.template_debug.x86_64.so"
+android.debug.double.x86_64 = "bin/android/libgdmotionmatching.android.template_debug.double.x86_64.so"
 android.release.x86_64 = "bin/android/libgdmotionmatching.android.template_release.x86_64.so"
+android.release.double.x86_64 = "bin/android/libgdmotionmatching.android.template_release.double.x86_64.so"
 android.debug.arm64 = "bin/android/libgdmotionmatching.android.template_debug.arm64.so"
-android.release.arm64 = "bin/android/libgdmotionmatching.android.template_release.arm64.so"
+android.debug.double.arm64 = "bin/android/libgdmotionmatching.android.template_debug.double.arm64.so"
+android.release.arm64 = "bin/android/libgdmotionmatching.android.template_release.arm64.so"
+android.release.double.arm64 = "bin/android/libgdmotionmatching.android.template_release.double.arm64.so"