updated demos -> ALT + mouse uses Maya-style controls, replaced BMF_Fonts by GLDebugFont

fix debug drawing of btMultiSphereShape
added box2d demo
added experimental gpu 2d demo

Demos/OpenGL/GlutDemoApplication.cpp

@@ -0,0 +1,84 @@
+
+#ifndef _WINDOWS
+#include "GlutDemoApplication.h"
+
+#include "GlutStuff.h"
+
+#include "BulletDynamics/Dynamics/btDiscreteDynamicsWorld.h"
+#include "BulletDynamics/Dynamics/btRigidBody.h"
+
+void	GlutDemoApplication::updateModifierKeys()
+{
+	m_modifierKeys = 0;
+	if (glutGetModifiers() & GLUT_ACTIVE_ALT)
+		m_modifierKeys |= BT_ACTIVE_ALT;
+
+	if (glutGetModifiers() & GLUT_ACTIVE_CTRL)
+		m_modifierKeys |= BT_ACTIVE_CTRL;
+	
+	if (glutGetModifiers() & GLUT_ACTIVE_SHIFT)
+		m_modifierKeys |= BT_ACTIVE_SHIFT;
+}
+
+void GlutDemoApplication::specialKeyboard(int key, int x, int y)	
+{
+	(void)x;
+	(void)y;
+
+	switch (key) 
+	{
+	case GLUT_KEY_F1:
+		{
+
+			break;
+		}
+
+	case GLUT_KEY_F2:
+		{
+
+			break;
+		}
+
+
+	case GLUT_KEY_END:
+		{
+			int numObj = getDynamicsWorld()->getNumCollisionObjects();
+			if (numObj)
+			{
+				btCollisionObject* obj = getDynamicsWorld()->getCollisionObjectArray()[numObj-1];
+
+				getDynamicsWorld()->removeCollisionObject(obj);
+				btRigidBody* body = btRigidBody::upcast(obj);
+				if (body && body->getMotionState())
+				{
+					delete body->getMotionState();					
+				}
+				delete obj;
+
+
+			}
+			break;
+		}
+	case GLUT_KEY_LEFT : stepLeft(); break;
+	case GLUT_KEY_RIGHT : stepRight(); break;
+	case GLUT_KEY_UP : stepFront(); break;
+	case GLUT_KEY_DOWN : stepBack(); break;
+	case GLUT_KEY_PAGE_UP : zoomIn(); break;
+	case GLUT_KEY_PAGE_DOWN : zoomOut(); break;
+	case GLUT_KEY_HOME : toggleIdle(); break;
+	default:
+		//        std::cout << "unused (special) key : " << key << std::endl;
+		break;
+	}
+
+	glutPostRedisplay();
+
+}
+
+void GlutDemoApplication::swapBuffers()
+{
+	glutSwapBuffers();
+
+}
+
+#endif //_WINDOWS