Added b3Printf, b3Warning and b3Error that can be re-routed to custom handlers.

See in src/Bullet3Common/b3Logging.h for details

Demos3/GpuDemos/main_opengl3core.cpp

@@ -399,10 +399,16 @@ const char* g_deviceName = "blaat";
 extern bool useNewBatchingKernel;
 #include "Bullet3Common/b3Vector3.h"
 
+FILE* defaultOutput = stdout;
+
+void myprintf(const char* msg)
+{
+	fprintf(defaultOutput,msg);
+}
+
 int main(int argc, char* argv[])
 {
-	FILE* defaultOutput = stdout;
-
+	b3SetCustomPrintfFunc(myprintf);
 	b3Vector3 test(1,2,3);
 	test.x = 1;
 	test.y = 4;
@@ -690,9 +696,9 @@ int main(int argc, char* argv[])
 		fprintf(defaultOutput,"  Preferred cl_platform index%d\n", ci.preferredOpenCLPlatformIndex);
 		fprintf(defaultOutput,"\n");
 
-		b3OpenCLUtils::printPlatformInfo(defaultOutput, demo->getInternalData()->m_platformId);
+		b3OpenCLUtils::printPlatformInfo( demo->getInternalData()->m_platformId);
 		fprintf(defaultOutput,"\n");
-		b3OpenCLUtils::printDeviceInfo(defaultOutput, demo->getInternalData()->m_clDevice);
+		b3OpenCLUtils::printDeviceInfo( demo->getInternalData()->m_clDevice);
 		fprintf(defaultOutput,"\n");
 		do
 		{

Demos3/GpuGuiInitialize/main.cpp

@@ -83,7 +83,7 @@ sth_stash* initFont(GLPrimitiveRenderer* primRender)
 	unsigned char* data = (unsigned char*) data2;
 	if (!(droidRegular = sth_add_font_from_memory(stash, data)))
 	{
-		printf("error!\n");
+		b3Error("error!\n");
 	}
 
     err = glGetError();

Demos3/GpuGuiInitialize/premake4.lua

@@ -50,7 +50,10 @@ function createProject(vendor)
 			"../../src/Bullet3Geometry/b3ConvexHullComputer.h",
 			"../../src/Bullet3Common/b3AlignedAllocator.cpp",
 			"../../src/Bullet3Common/b3Quickprof.cpp",
-			"../../src/Bullet3Common/b3Quickprof.h"
+			"../../src/Bullet3Common/b3Quickprof.h",
+			"../../src/Bullet3Common/b3Logging.cpp",
+			"../../src/Bullet3Common/b3Logging.h",
+
 		}
 
 		if os.is("Windows") then