move OpenCL initialization for the unit tests in a shared header file, and support some basic command-line arguments

--cl_device=1 --cl_platform=1 --allow_opencl_cpu
add chaindemo, test for mass ratios
restore sleeping/activation mode in featherstone demo
Use _VARIADIC_MAX=10 to avoid Google Test issues with Visual Studio 2012, thanks to Mobeen for the report
Enable verbose printf for unit tests

Demos3/AllBullet2Demos/BulletDemoEntries.h

@@ -10,7 +10,7 @@
 
 #include "../bullet2/RagdollDemo/RagdollDemo.h"
 #include "../bullet2/LuaDemo/LuaDemo.h"
-
+#include "../bullet2/ChainDemo/ChainDemo.h"
 
 struct BulletDemoEntry
 {
@@ -24,6 +24,7 @@ static BulletDemoEntry allDemos[]=
 	
 	//{"emptydemo",EmptyBulletDemo::MyCreateFunc},
 	{"BasicDemo",BasicDemo::MyCreateFunc},
+	//{"ChainDemo",ChainDemo::MyCreateFunc},
 	{"HingeDemo",HingeDemo::MyCreateFunc},
 	{"Ragdoll",RagDollDemo::MyCreateFunc},
 	{"MultiBody1",FeatherstoneDemo1::MyCreateFunc},

Demos3/AllBullet2Demos/main.cpp

@@ -14,6 +14,8 @@ static int sCurrentDemoIndex = 0;
 static BulletDemoInterface* sCurrentDemo = 0;
 static b3AlignedObjectArray<const char*> allNames;
 
+
+bool drawGUI=true;
 extern bool useShadowMap;
 static bool wireframe=false;
 static bool pauseSimulation=false;
@@ -128,8 +130,10 @@ void	MyComboBoxCallback(int comboId, const char* item)
 	
 }
 
+extern bool sOpenGLVerbose;
 int main(int argc, char* argv[])
 {
+	sOpenGLVerbose = false;
 	
 	float dt = 1./120.f;
 	int width = 1024;
@@ -175,12 +179,17 @@ int main(int argc, char* argv[])
 		app->m_instancingRenderer->updateCamera();
 		
 		app->drawGrid();
+		
+		if (0)
+		{
 		char bla[1024];
 		static int frameCount = 0;
 		frameCount++;
 		sprintf(bla,"Simple test frame %d", frameCount);
 		
 		app->drawText(bla,10,10);
+		}
+
 		if (sCurrentDemo)
 		{
 			if (!pauseSimulation)

Demos3/AllBullet2Demos/premake4.lua

@@ -31,6 +31,9 @@
 		"../bullet2/BasicDemo/BasicDemo.h",
 		"../bullet2/BasicDemo/HingeDemo.cpp",
 		"../bullet2/BasicDemo/HingeDemo.h",
+		"../bullet2/BasicDemo/ChainDemo.cpp",
+		"../bullet2/BasicDemo/ChainDemo.h",
+		
 		"../bullet2/RagdollDemo/RagdollDemo.cpp",
 		"../bullet2/RagdollDemo/RagdollDemo.h",
 		"../bullet2/LuaDemo/LuaDemo.cpp",