prepare for Box2D style gui demo

Examples/TestBed/FrameWork/Render.cpp

@@ -0,0 +1,67 @@
+/*
+* Copyright (c) 2006-2007 Erin Catto http://www.gphysics.com
+*
+* This software is provided 'as-is', without any express or implied
+* warranty.  In no event will the authors be held liable for any damages
+* arising from the use of this software.
+* Permission is granted to anyone to use this software for any purpose,
+* including commercial applications, and to alter it and redistribute it
+* freely, subject to the following restrictions:
+* 1. The origin of this software must not be misrepresented; you must not
+* claim that you wrote the original software. If you use this software
+* in a product, an acknowledgment in the product documentation would be
+* appreciated but is not required.
+* 2. Altered source versions must be plainly marked as such, and must not be
+* misrepresented as being the original software.
+* 3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "Render.h"
+
+//#include "freeglut/gl/glut.h"
+//think different
+#if defined(__APPLE__) && !defined (VMDMESA)
+#include <OpenGL/gl.h>
+#include <OpenGL/glu.h>
+#include <GLUT/glut.h>
+#else
+#include <GL/glut.h>
+#endif
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+
+void DrawString(int x, int y, const char *string, ...)
+{
+	char buffer[128];
+
+	va_list arg;
+	va_start(arg, string);
+	vsprintf(buffer, string, arg);
+	va_end(arg);
+
+	glMatrixMode(GL_PROJECTION);
+	glPushMatrix();
+	glLoadIdentity();
+	int w = glutGet(GLUT_WINDOW_WIDTH);
+	int h = glutGet(GLUT_WINDOW_HEIGHT);
+	gluOrtho2D(0, w, h, 0);
+	glMatrixMode(GL_MODELVIEW);
+	glPushMatrix();
+	glLoadIdentity();
+
+	glColor3f(0.9f, 0.6f, 0.6f);
+	glRasterPos2i(x, y);
+	int length = (int)strlen(buffer);
+	for (int i = 0; i < length; ++i)
+	{
+		glutBitmapCharacter(GLUT_BITMAP_8_BY_13, buffer[i]);
+	}
+
+	glPopMatrix();
+	glMatrixMode(GL_PROJECTION);
+	glPopMatrix();
+	glMatrixMode(GL_MODELVIEW);
+}
+