add preliminary Android build files for Bullet

add SimpleOpenGL3 example and show how to override
keyboard, mouse, wheel, resize callbacks

build3/Android/jni/Android.mk

@@ -0,0 +1,49 @@
+LOCAL_PATH := ../../..
+
+include $(CLEAR_VARS)
+
+LOCAL_CFLAGS := $(LOCAL_C_INCLUDES:%=-I%) -DUSE_PTHREADS -mfpu=neon -mfloat-abi=softfp -pthread -DSCE_PFX_USE_SIMD_VECTORMATH
+
+# apply these flags if needed 
+# -ffast-math -funsafe-math-optimizations
+
+# apply this to disable optimization
+# TARGET_CFLAGS := $(TARGET_CFLAGS) -O0
+
+# apply these 2 to turn on assembly output (*.c/*.cpp to *.s file)
+#compile-cpp-source = $(eval $(call ev-compile-cpp-source,$1,$(1:%$(LOCAL_CPP_EXTENSION)=%.s)))
+#TARGET_CFLAGS := $(TARGET_CFLAGS) -S
+
+# Enable or disable NEON. Don't forget to apply, or not apply, -mfpu=neon and -mfloat-abi=softfp
+# flags in addition, e.g., if this is true both of those need to be included in LOCAL_CFLAGS
+# to avoid the possibility that ndk-build will "forget" to add them on some files
+LOCAL_ARM_NEON := true
+
+TARGET_CFLAGS := $(filter-out -ffpu=vfp,$(TARGET_CFLAGS))
+
+# setup to build static library
+LOCAL_MODULE := libBullet
+
+LOCAL_C_INCLUDES :=  $(LOCAL_PATH)/src
+
+#find all the file recursively under jni/
+FILE_LIST := $(wildcard \
+		$(LOCAL_PATH)/src/LinearMath/*.cpp \
+		$(LOCAL_PATH)/src/Bullet3Common/*.cpp \
+		$(LOCAL_PATH)/src/BulletCollision/BroadphaseCollision/*.cpp \
+		$(LOCAL_PATH)/src/BulletCollision/CollisionDispatch/*.cpp \
+		$(LOCAL_PATH)/src/BulletCollision/CollisionShapes/*.cpp \
+		$(LOCAL_PATH)/src/BulletCollision/NarrowPhaseCollision/*.cpp \
+		$(LOCAL_PATH)/src/BulletDynamics/ConstraintSolver/*.cpp \
+		$(LOCAL_PATH)/src/BulletDynamics/Dynamics/*.cpp \
+		$(LOCAL_PATH)/src/BulletDynamics/Featherstone/*.cpp \
+		$(LOCAL_PATH)/src/BulletDynamics/MLCPSolvers/*.cpp \
+		$(LOCAL_PATH)/src/BulletDynamics/Vehicle/*.cpp \
+		$(LOCAL_PATH)/src/BulletDynamics/Character/*.cpp \
+		$(LOCAL_PATH)/src/BulletSoftBody/*.cpp \
+		$(LOCAL_PATH)/src/BulletInverseDynamics/*.cpp \
+		$(LOCAL_PATH)/src/BulletInverseDynamics/details/*.cpp \
+		)
+LOCAL_SRC_FILES := $(FILE_LIST:$(LOCAL_PATH)/%=%)
+
+include $(BUILD_STATIC_LIBRARY)

build3/Android/jni/Application.mk

@@ -0,0 +1,7 @@
+APP_MODULES := libBullet
+APP_ABI := armeabi-v7a
+APP_OPTIM := release
+
+#We only need STL for placement new (#include <new>) 
+#We don't use STL in Bullet
+APP_STL                 := stlport_static

build3/premake4.lua

@@ -199,6 +199,7 @@
 		include "../examples/ExampleBrowser"
 		include "../examples/OpenGLWindow"
 		include "../examples/ThirdPartyLibs/Gwen"
+		include "../examples/SimpleOpenGL3"
 
 		include "../examples/HelloWorld"
 		include "../examples/BasicDemo"

examples/OpenGLWindow/opengl_fontstashcallbacks.cpp

@@ -37,7 +37,6 @@ InternalOpenGL2RenderCallbacks::~InternalOpenGL2RenderCallbacks()
 
 void InternalOpenGL2RenderCallbacks::display2() 
 {
-    
     assert(glGetError()==GL_NO_ERROR);
    // glViewport(0,0,10,10);
     

examples/SimpleOpenGL3/main.cpp

@@ -1,4 +1,5 @@
 #include "OpenGLWindow/SimpleOpenGL3App.h"
+
 #include "Bullet3Common/b3Vector3.h"
 #include "Bullet3Common/b3CommandLineArgs.h"
 #include "assert.h"
@@ -8,6 +9,50 @@
 char* gVideoFileName = 0;
 char* gPngFileName = 0;
 
+static b3WheelCallback sOldWheelCB = 0;
+static b3ResizeCallback sOldResizeCB = 0;
+static b3MouseMoveCallback sOldMouseMoveCB = 0;
+static b3MouseButtonCallback sOldMouseButtonCB = 0;
+static b3KeyboardCallback sOldKeyboardCB = 0;
+static b3RenderCallback sOldRenderCB = 0;
+
+
+void MyWheelCallback(float deltax, float deltay)
+{
+	if (sOldWheelCB)
+		sOldWheelCB(deltax,deltay);
+}
+void MyResizeCallback( float width, float height)
+{
+	if (sOldResizeCB)
+		sOldResizeCB(width,height);
+}
+void MyMouseMoveCallback( float x, float y)
+{
+	printf("Mouse Move: %f, %f\n", x,y);
+
+	if (sOldMouseMoveCB)
+		sOldMouseMoveCB(x,y);
+}
+void MyMouseButtonCallback(int button, int state, float x, float y)
+{
+	if (sOldMouseButtonCB)
+		sOldMouseButtonCB(button,state,x,y);
+}
+
+
+void MyKeyboardCallback(int keycode, int state)
+{
+	//keycodes are in examples/CommonInterfaces/CommonWindowInterface.h
+	//for example B3G_ESCAPE for escape key
+	//state == 1 for pressed, state == 0 for released.
+	// use app->m_window->isModifiedPressed(...) to check for shift, escape and alt keys
+	printf("MyKeyboardCallback received key:%c in state %d\n",keycode,state);
+	if (sOldKeyboardCB)
+		sOldKeyboardCB(keycode,state);
+}
+
+
 int main(int argc, char* argv[])
 {
     b3CommandLineArgs myArgs(argc,argv);
@@ -17,8 +62,20 @@ int main(int argc, char* argv[])
 	app->m_instancingRenderer->getActiveCamera()->setCameraDistance(13);
 	app->m_instancingRenderer->getActiveCamera()->setCameraPitch(0);
 	app->m_instancingRenderer->getActiveCamera()->setCameraTargetPosition(0,0,0);
+	sOldKeyboardCB = app->m_window->getKeyboardCallback();	
+	app->m_window->setKeyboardCallback(MyKeyboardCallback);
+	sOldMouseMoveCB = app->m_window->getMouseMoveCallback();
+	app->m_window->setMouseMoveCallback(MyMouseMoveCallback);
+	sOldMouseButtonCB = app->m_window->getMouseButtonCallback();
+	app->m_window->setMouseButtonCallback(MyMouseButtonCallback);
+	sOldWheelCB = app->m_window->getWheelCallback();
+	app->m_window->setWheelCallback(MyWheelCallback);
+	sOldResizeCB = app->m_window->getResizeCallback();
+	app->m_window->setResizeCallback(MyResizeCallback);
+  
 
-    assert(glGetError()==GL_NO_ERROR);
+
+  assert(glGetError()==GL_NO_ERROR);
 
     myArgs.GetCmdLineArgument("mp4_file",gVideoFileName);
     if (gVideoFileName)