bullet with double precision

panda/src/bullet/bullet_includes.h

@@ -17,6 +17,10 @@
 
 #include "pandabase.h"
 
+#ifdef STDFLOAT_DOUBLE
+#define BT_USE_DOUBLE_PRECISION 1
+#endif
+
 #include "btBulletDynamicsCommon.h"
 
 #ifndef CPPPARSER