From add42830d9e482bb22466a284cacf8909f0f7e29 Mon Sep 17 00:00:00 2001
From: Andrei Kortunov <andrei.kortunov@yandex.ru>
Date: Fri, 15 May 2020 12:39:04 +0400
Subject: [PATCH] Add a flag to use double-precision functions from Bullet

---
 CMakeLists.txt             | 2 +-
 apps/openmw/CMakeLists.txt | 4 ++++
 components/CMakeLists.txt  | 4 ++++
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ba73908aca..4cc9ccd55a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,7 @@ option(BUILD_NIFTEST            "Build nif file tester" ON)
 option(BUILD_DOCS               "Build documentation." OFF )
 option(BUILD_WITH_CODE_COVERAGE "Enable code coverage with gconv" OFF)
 option(BUILD_UNITTESTS          "Enable Unittests with Google C++ Unittest" OFF)
+option(BULLET_USE_DOUBLES       "Use double precision for Bullet" OFF)
 
 if (NOT BUILD_LAUNCHER AND NOT BUILD_OPENCS AND NOT BUILD_WIZARD)
    set(USE_QT FALSE)
@@ -904,4 +905,3 @@ if (DOXYGEN_FOUND)
         WORKING_DIRECTORY ${OpenMW_BINARY_DIR}
         COMMENT "Generating documentation for the github-pages at ${DOXYGEN_PAGES_OUTPUT_DIR}" VERBATIM)
 endif ()
-
diff --git a/apps/openmw/CMakeLists.txt b/apps/openmw/CMakeLists.txt
index 34824ea331..2107b74fe2 100644
--- a/apps/openmw/CMakeLists.txt
+++ b/apps/openmw/CMakeLists.txt
@@ -15,6 +15,10 @@ set(GAME_HEADER
     engine.hpp
 )
 
+if (BULLET_USE_DOUBLES)
+    add_definitions(-DBT_USE_DOUBLE_PRECISION)
+endif()
+
 source_group(game FILES ${GAME} ${GAME_HEADER})
 
 add_openmw_dir (mwrender
diff --git a/components/CMakeLists.txt b/components/CMakeLists.txt
index a7d70b4e0e..859c79920c 100644
--- a/components/CMakeLists.txt
+++ b/components/CMakeLists.txt
@@ -285,3 +285,7 @@ endif()
 
 # Make the variable accessible for other subdirectories
 set(COMPONENT_FILES ${COMPONENT_FILES} PARENT_SCOPE)
+
+if (BULLET_USE_DOUBLES)
+    add_definitions(-DBT_USE_DOUBLE_PRECISION)
+endif()