allow to compile and run the ExampleBrowser on older Mac OSX versions (without OpenGL3)

using the 'NO_OPENGL3' preprocessor definition
both premake/cmake has support for this now
needs some testing

examples/ExampleBrowser/ExampleEntries.cpp

@@ -33,9 +33,10 @@
 #include "../RollingFrictionDemo/RollingFrictionDemo.h"
 
 #ifdef B3_USE_CLEW
+#ifndef NO_OPENGL3
 #include "../OpenCL/broadphase/PairBench.h"
 #include "../OpenCL/rigidbody/GpuConvexScene.h"
-
+#endif
 #endif //B3_USE_CLEW
 
 
@@ -193,6 +194,7 @@ static ExampleEntry gDefaultExamples[]=
 };
 
 #ifdef B3_USE_CLEW
+#ifndef NO_OPENGL3
 static ExampleEntry gOpenCLExamples[]=
 {
 	ExampleEntry(0,"OpenCL (experimental)"),
@@ -201,6 +203,7 @@ static ExampleEntry gOpenCLExamples[]=
 	ExampleEntry(1,"Pair Bench", "Benchmark of overlapping pair search using OpenCL.", PairBenchOpenCLCreateFunc),
 
 };
+#endif
 #endif //
 static btAlignedObjectArray<ExampleEntry> gAdditionalRegisteredExamples;
 
@@ -223,11 +226,13 @@ ExampleEntries::~ExampleEntries()
 void ExampleEntries::initOpenCLExampleEntries()
 {
 #ifdef B3_USE_CLEW
+#ifndef NO_OPENGL3
 	int numDefaultEntries = sizeof(gOpenCLExamples)/sizeof(ExampleEntry);
 	for (int i=0;i<numDefaultEntries;i++)
 	{
 		m_data->m_allExamples.push_back(gOpenCLExamples[i]);
 	}
+#endif
 #endif //B3_USE_CLEW
 }
 

examples/ExampleBrowser/OpenGLExampleBrowser.cpp

@@ -2,7 +2,9 @@
 #include "LinearMath/btQuickprof.h"
 #include "../OpenGLWindow/OpenGLInclude.h"
 #include "../OpenGLWindow/SimpleOpenGL2App.h"
+#ifndef NO_OPENGL3
 #include "../OpenGLWindow/SimpleOpenGL3App.h"
+#endif
 #include "../CommonInterfaces/CommonRenderInterface.h"
 #ifdef __APPLE__
 #include "../OpenGLWindow/MacOpenGLWindow.h"
@@ -60,7 +62,10 @@ static b3AlignedObjectArray<const char*> allNames;
 static class ExampleEntries* gAllExamples=0;
 bool sUseOpenGL2 = false;
 bool drawGUI=true;
+#ifndef USE_OPENGL3
 extern bool useShadowMap;
+#endif
+
 static bool visualWireframe=false;
 static bool renderVisualGeometry=true;
 static bool renderGrid = true;
@@ -150,12 +155,12 @@ void MyKeyboardCallback(int key, int state)
 	{
 		pauseSimulation = !pauseSimulation;
 	}
-
+#ifndef NO_OPENGL3
 	if (key=='s' && state)
 	{
 		useShadowMap=!useShadowMap;
 	}
-
+#endif
 	if (key==B3G_ESCAPE && s_window)
 	{
 		s_window->setRequestExit();
@@ -598,10 +603,12 @@ bool OpenGLExampleBrowser::init(int argc, char* argv[])
 	
 	int width = 1024;
     int height=768;
-
+#ifndef NO_OPENGL3
     SimpleOpenGL3App* simpleApp=0;
 	sUseOpenGL2 =args.CheckCmdLineFlag("opengl2");
-
+#else
+	sUseOpenGL2 = true;
+#endif
 	const char* appTitle = "Bullet Physics ExampleBrowser";
 #if defined (_DEBUG) || defined (DEBUG)
 	const char* optMode = "Debug build (slow)";
@@ -615,19 +622,22 @@ bool OpenGLExampleBrowser::init(int argc, char* argv[])
 		sprintf(title,"%s using limited OpenGL2 fallback. %s", appTitle,optMode);
         s_app = new SimpleOpenGL2App(title,width,height);
         s_app->m_renderer = new SimpleOpenGL2Renderer(width,height);
-    } else
+    } 
+#ifndef NO_OPENGL3
+	else
     {
 		char title[1024];
 		sprintf(title,"%s using OpenGL3+. %s", appTitle,optMode);
         simpleApp = new SimpleOpenGL3App(title,width,height);
         s_app = simpleApp;
     }
+#endif
     char* gVideoFileName = 0;
     args.GetCmdLineArgument("mp4",gVideoFileName);
-    
+   #ifndef NO_OPENGL3 
     if (gVideoFileName)
         simpleApp->dumpFramesToVideo(gVideoFileName);
-    
+   #endif 
    
     s_instancingRenderer = s_app->m_renderer;
 	s_window  = s_app->m_window;
@@ -658,11 +668,14 @@ bool OpenGLExampleBrowser::init(int argc, char* argv[])
     if (sUseOpenGL2 )
     {
         gwenRenderer = new Gwen::Renderer::OpenGL_DebugFont();
-    } else
+    } 
+#ifndef NO_OPENGL3
+	else
     {
         sth_stash* fontstash=simpleApp->getFontStash();
         gwenRenderer = new GwenOpenGL3CoreRenderer(simpleApp->m_primRenderer,fontstash,width,height,s_window->getRetinaScale(),myTexLoader);
     }
+#endif
 	//
 
 	gui->init(width,height,gwenRenderer,s_window->getRetinaScale());

examples/ExampleBrowser/premake4.lua

@@ -93,7 +93,7 @@
 
 		}
 		
-		if (hasCL) then
+		if (hasCL and findOpenGL3()) then
 			files {
 				"../OpenCL/broadphase/*",
 				"../OpenCL/CommonOpenCL/*",

examples/OpenGLWindow/GLInstancingRenderer.cpp

@@ -1,3 +1,4 @@
+#ifndef NO_OPENGL3
 /*
 Copyright (c) 2012 Advanced Micro Devices, Inc.
 
@@ -1641,3 +1642,4 @@ int GLInstancingRenderer::getInstanceCapacity() const
 {
 	return m_data->m_maxNumObjectCapacity;
 }
+#endif //NO_OPENGL3

examples/OpenGLWindow/GLPrimitiveRenderer.cpp

@@ -1,3 +1,4 @@
+#ifndef NO_OPENGL3
 #include "GLPrimitiveRenderer.h"
 #include "GLPrimInternalData.h"
 
@@ -319,4 +320,5 @@ void GLPrimitiveRenderer::setScreenSize(int width, int height)
 	m_screenWidth = width;
 	m_screenHeight = height;
     
-}
+}
+#endif

examples/OpenGLWindow/GLRenderToTexture.cpp

@@ -1,3 +1,4 @@
+#ifndef NO_OPENGL3
 
 ///See http://www.opengl-tutorial.org/intermediate-tutorials/tutorial-14-render-to-texture/
 
@@ -132,4 +133,5 @@ GLRenderToTexture::~GLRenderToTexture()
 		glDeleteFramebuffers(1, &m_framebufferName);
 	}
 }
+#endif
 

examples/OpenGLWindow/MacOpenGLWindow.mm

@@ -2,8 +2,8 @@
 
 #define GL_DO_NOT_WARN_IF_MULTI_GL_VERSION_HEADERS_INCLUDED
 #import <Cocoa/Cocoa.h>
-#include <OpenGL/gl3.h>
-#include <OpenGL/gl3ext.h>
+#include "OpenGLInclude.h"
+
 
 
 #include <stdlib.h>
@@ -107,16 +107,16 @@ float loop;
         {
             (*m_resizeCallback)(width,height);
         }
-     
+    #ifndef NO_OPENGL3 
 		NSRect backingBounds = [self convertRectToBacking:[self bounds]];
         GLsizei backingPixelWidth  = (GLsizei)(backingBounds.size.width),
         backingPixelHeight = (GLsizei)(backingBounds.size.height);
         
         // Set viewport
         glViewport(0, 0, backingPixelWidth, backingPixelHeight);
-		
-     //   glViewport(0,0,(GLsizei)width,(GLsizei)height);
-
+	#else	
+       glViewport(0,0,(GLsizei)width,(GLsizei)height);
+#endif
 	}
 	
 	[m_context setView: self];
@@ -140,7 +140,7 @@ float loop;
 
 	
 	
-	
+#ifndef NO_OPENGL3	
 	if (openglVersion==3)
 	{
 		NSOpenGLPixelFormatAttribute attrs[] =
@@ -156,6 +156,7 @@ float loop;
 		// Init GL context
 		fmt = [[NSOpenGLPixelFormat alloc] initWithAttributes: (NSOpenGLPixelFormatAttribute*)attrs];
 	} else
+#endif
 	{
 		NSOpenGLPixelFormatAttribute attrs[] =
 		{
@@ -437,8 +438,11 @@ void MacOpenGLWindow::createWindow(const b3gWindowConstructionInfo& ci)
      TransformProcessType(&psn, kProcessTransformToForegroundApplication);
      SetFrontProcess(&psn);
     */
- 
+#ifndef NO_OPENGL3 
     m_retinaScaleFactor = [m_internalData->m_myview convertSizeToBacking:sz].width;
+#else
+	m_retinaScaleFactor=1.f;
+#endif
 
      [m_internalData->m_myApp finishLaunching];
     [pool release];

examples/OpenGLWindow/OpenGLInclude.h

@@ -24,7 +24,7 @@ subject to the following restrictions:
 //#include <OpenGL/gl.h>
 //#include <OpenGL/glu.h>
 //#import <Cocoa/Cocoa.h>
-#ifdef USE_OPENGL2
+#if defined (USE_OPENGL2) || defined (NO_OPENGL3)
 #include <OpenGL/gl.h>
 #else
 #include <OpenGL/gl3.h>

examples/OpenGLWindow/opengl_fontstashcallbacks.cpp

@@ -1,3 +1,4 @@
+#ifndef NO_OPENGL3
 #include "opengl_fontstashcallbacks.h"
 #include "../OpenGLWindow/GLPrimitiveRenderer.h"
 #include "../OpenGLWindow/GLPrimInternalData.h"
@@ -250,3 +251,5 @@ void dumpTextureToPng(int textureWidth, int textureHeight, const char* fileName)
 	free(pixels);
 
 }
+#endif
+

examples/Vehicles/Hinge2Vehicle.cpp

@@ -301,13 +301,11 @@ Hinge2Vehicle::~Hinge2Vehicle()
 }
 
 
-extern float shadowMapWorldSize;
 
 void Hinge2Vehicle::initPhysics()
 {
 	m_guiHelper->setUpAxis(1);
 
-	shadowMapWorldSize = 10;
 
 	btCollisionShape* groundShape = new btBoxShape(btVector3(50,3,50));
 	m_collisionShapes.push_back(groundShape);