make GLUT optional in cmake

fix for btMultiBody to avoid extreme energy gain

Demos3/SimpleOpenGL3/CMakeLists.txt

@@ -0,0 +1,41 @@
+
+
+INCLUDE_DIRECTORIES(
+	${BULLET_PHYSICS_SOURCE_DIR}/src 
+	${BULLET_PHYSICS_SOURCE_DIR}/btgui
+)
+ 
+ 
+SET(AppSimpleOpenGL3_SRCS
+	main.cpp
+	${BULLET_PHYSICS_SOURCE_DIR}/build3/bullet.rc
+)
+
+IF (WIN32)
+	SET(AppSimpleOpenGL3_SRCS ${AppSimpleOpenGL3_SRCS}  ${AppSimpleOpenGL3_Common_SRCS})
+	INCLUDE_DIRECTORIES(
+				${BULLET_PHYSICS_SOURCE_DIR}/btgui/OpenGLWindow/GlewWindows
+	)
+	ADD_DEFINITIONS(-DGLEW_STATIC)
+ELSE(WIN32)
+	IF(NOT APPLE)
+		LINK_LIBRARIES( GLEW)
+	ENDIF(NOT APPLE)
+ENDIF(WIN32)
+ 
+	
+
+LINK_LIBRARIES(
+	Bullet3Common OpenGLWindow gwen ${OPENGL_gl_LIBRARY} ${OPENGL_glu_LIBRARY}
+)
+
+ADD_EXECUTABLE(AppSimpleOpenGL3
+		${AppSimpleOpenGL3_SRCS}
+)
+	
+
+IF (INTERNAL_ADD_POSTFIX_EXECUTABLE_NAMES)
+			SET_TARGET_PROPERTIES(AppSimpleOpenGL3 PROPERTIES  DEBUG_POSTFIX "_Debug")
+			SET_TARGET_PROPERTIES(AppSimpleOpenGL3 PROPERTIES  MINSIZEREL_POSTFIX "_MinsizeRel")
+			SET_TARGET_PROPERTIES(AppSimpleOpenGL3 PROPERTIES  RELWITHDEBINFO_POSTFIX "_RelWithDebugInfo")
+ENDIF(INTERNAL_ADD_POSTFIX_EXECUTABLE_NAMES)

Demos3/SimpleOpenGL3/premake4.lua

@@ -26,8 +26,9 @@
 		"../../btgui/Timing/b3Clock.h"
 
 		}
+		
 if os.is("Linux") then links {"X11"} end
 
 if os.is("MacOSX") then
-                        links{"Cocoa.framework"}
+	links{"Cocoa.framework"}
 end