Delete duplicate GL headers

Nothing was pointing at BBGE/glext.

Only the VS project was pointing at ExternalLibs/GL. I have pointed it
at the headers under BBGE/GL instead.

I have also adjusted the includes to use the GL prefix as is standard
practise. These will still work as BBGE is in the include path. This
allows users to build against their system GL headers simply by
deleting the BBGE/GL directory.

BBGE/GLLoad.cpp

@@ -14,7 +14,7 @@
 #define GLAPIENTRY
 #endif
 
-#include "glext.h"
+#include <GL/glext.h>
 
 
 PFNGLGENERATEMIPMAPEXTPROC glGenerateMipmapEXT = NULL;

BBGE/RenderBase.h

@@ -9,8 +9,8 @@
 #endif
 
 #define GL_GLEXT_LEGACY 1
-#include "gl.h"
-#include "glext.h"
+#include <GL/gl.h>
+#include <GL/glext.h>
 
 #ifdef _WINDOWS_
 #error windows.h was included! euuugh!

ExternalLibs/GL/gles.h

@@ -1,14 +0,0 @@
-/* OpenGL ES-specific. --ryan. */
-/* I should probably put an official GLES header in here instead. Oh well. */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-void glOrthof(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top, GLfloat zNear, GLfloat zFar);
-void glClearDepthf(GLclampf depth);
-
-#ifdef __cplusplus
-}
-#endif
-

ExternalLibs/glfont2/glfont2.cpp

@@ -19,7 +19,7 @@ using namespace std;
 #include <windows.h>
 #undef GetCharWidth
 #endif
-#include "gl.h"
+#include <GL/gl.h>
 
 //glFont header
 #include "glfont2.h"

ExternalLibs/glpng/glpng.c

@@ -31,11 +31,9 @@
 //#define GL_GLEXT_PROTOTYPES
 
 //#include <GL/glpng.h>
-//#include <GL/gl.h>
-//#include <GL/glext.h>
 #include "../glpng.h"
-#include "gl.h"
-#include "glext.h"
+#include <GL/gl.h>
+#include <GL/glext.h>
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>

win/vc90/Aquaria.vcproj

@@ -42,7 +42,7 @@
 				Name="VCCLCompilerTool"
 				AdditionalOptions="/MP"
 				Optimization="0"
-				AdditionalIncludeDirectories=""$(SolutionDir)\..\ExternalLibs\freetype2\include\freetype\config";"$(SolutionDir)\..\ExternalLibs\gl";"$(SolutionDir)\..\ExternalLibs\glpng\zlib";"$(SolutionDir)\..\ExternalLibs\glpng\png";"$(SolutionDir)\..\ExternalLibs\libogg\include";"$(SolutionDir)\..\ExternalLibs\libvorbis\include";"$(SolutionDir)\..\ExternalLibs\freetype2\include";"$(SolutionDir)\..\ExternalLibs\FTGL\include";"$(SolutionDir)\..\ExternalLibs\SDL2\include";"$(SolutionDir)\..\ExternalLibs\AL\include";"$(SolutionDir)\..\BBGE";"$(SolutionDir)\..\ExternalLibs\lua-5.1.4\src";"$(SolutionDir)\..\ExternalLibs\lvpa\include";"$(SolutionDir)\..\ExternalLibs\lvpa";"$(SolutionDir)\..\ExternalLibs\ttvfs";"$(SolutionDir)\..\ExternalLibs\ttvfs_cfileapi";"$(SolutionDir)\..\ExternalLibs""
+				AdditionalIncludeDirectories=""$(SolutionDir)\..\ExternalLibs\freetype2\include\freetype\config";"$(SolutionDir)\..\ExternalLibs\glpng\zlib";"$(SolutionDir)\..\ExternalLibs\glpng\png";"$(SolutionDir)\..\ExternalLibs\libogg\include";"$(SolutionDir)\..\ExternalLibs\libvorbis\include";"$(SolutionDir)\..\ExternalLibs\freetype2\include";"$(SolutionDir)\..\ExternalLibs\FTGL\include";"$(SolutionDir)\..\ExternalLibs\SDL2\include";"$(SolutionDir)\..\ExternalLibs\AL\include";"$(SolutionDir)\..\BBGE";"$(SolutionDir)\..\ExternalLibs\lua-5.1.4\src";"$(SolutionDir)\..\ExternalLibs\lvpa\include";"$(SolutionDir)\..\ExternalLibs\lvpa";"$(SolutionDir)\..\ExternalLibs\ttvfs";"$(SolutionDir)\..\ExternalLibs\ttvfs_cfileapi";"$(SolutionDir)\..\ExternalLibs""
 				PreprocessorDefinitions="WIN32;_DEBUG;_CONSOLE;GL_GLEXT_LEGACY=1;HAVE_PUTENV=1;_CRT_SECURE_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;BBGE_BUILD_WINDOWS=1;BBGE_BUILD_VFS=1;VFS_ENABLE_C_API=1;BBGE_USE_GLM=1;AQUARIA_INTERNAL_FTGL=1;BBGE_BUILD_SDL2"
 				MinimalRebuild="false"
 				BasicRuntimeChecks="0"
@@ -125,7 +125,7 @@
 				FavorSizeOrSpeed="1"
 				OmitFramePointers="true"
 				EnableFiberSafeOptimizations="true"
-				AdditionalIncludeDirectories=""$(SolutionDir)\..\ExternalLibs\freetype2\include\freetype\config";"$(SolutionDir)\..\ExternalLibs\gl";"$(SolutionDir)\..\ExternalLibs\glpng\zlib";"$(SolutionDir)\..\ExternalLibs\glpng\png";"$(SolutionDir)\..\ExternalLibs\libogg\include";"$(SolutionDir)\..\ExternalLibs\libvorbis\include";"$(SolutionDir)\..\ExternalLibs\freetype2\include";"$(SolutionDir)\..\ExternalLibs\FTGL\include";"$(SolutionDir)\..\ExternalLibs\SDL2\include";"$(SolutionDir)\..\ExternalLibs\AL\include";"$(SolutionDir)\..\BBGE";"$(SolutionDir)\..\ExternalLibs\lua-5.1.4\src";"$(SolutionDir)\..\ExternalLibs\lvpa\include";"$(SolutionDir)\..\ExternalLibs\lvpa";"$(SolutionDir)\..\ExternalLibs\ttvfs";"$(SolutionDir)\..\ExternalLibs\ttvfs_cfileapi";"$(SolutionDir)\..\ExternalLibs""
+				AdditionalIncludeDirectories=""$(SolutionDir)\..\ExternalLibs\freetype2\include\freetype\config";"$(SolutionDir)\..\ExternalLibs\glpng\zlib";"$(SolutionDir)\..\ExternalLibs\glpng\png";"$(SolutionDir)\..\ExternalLibs\libogg\include";"$(SolutionDir)\..\ExternalLibs\libvorbis\include";"$(SolutionDir)\..\ExternalLibs\freetype2\include";"$(SolutionDir)\..\ExternalLibs\FTGL\include";"$(SolutionDir)\..\ExternalLibs\SDL2\include";"$(SolutionDir)\..\ExternalLibs\AL\include";"$(SolutionDir)\..\BBGE";"$(SolutionDir)\..\ExternalLibs\lua-5.1.4\src";"$(SolutionDir)\..\ExternalLibs\lvpa\include";"$(SolutionDir)\..\ExternalLibs\lvpa";"$(SolutionDir)\..\ExternalLibs\ttvfs";"$(SolutionDir)\..\ExternalLibs\ttvfs_cfileapi";"$(SolutionDir)\..\ExternalLibs""
 				PreprocessorDefinitions="WIN32;NDEBUG;GL_GLEXT_LEGACY=1;HAVE_PUTENV=1;_CRT_SECURE_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;BBGE_BUILD_WINDOWS=1;_HAS_EXCEPTIONS=0;BBGE_BUILD_VFS=1;VFS_ENABLE_C_API=1;BBGE_USE_GLM=1;AQUARIA_INTERNAL_FTGL=1;BBGE_BUILD_SDL2"
 				StringPooling="true"
 				ExceptionHandling="0"

win/vc90/BBGE.vcproj

@@ -43,7 +43,7 @@
 				Name="VCCLCompilerTool"
 				AdditionalOptions="/MP"
 				Optimization="0"
-				AdditionalIncludeDirectories=""$(SolutionDir)\..\ExternalLibs\freetype2\include\freetype\config";"$(SolutionDir)\..\ExternalLibs\gl";"$(SolutionDir)\..\ExternalLibs\zlib";"$(SolutionDir)\..\ExternalLibs\png";"$(SolutionDir)\..\ExternalLibs\libogg\include";"$(SolutionDir)\..\ExternalLibs\libvorbis\include";"$(SolutionDir)\..\ExternalLibs\freetype2\include";"$(SolutionDir)\..\ExternalLibs\FTGL\include";"$(SolutionDir)\..\ExternalLibs\SDL2\include";"$(SolutionDir)\..\ExternalLibs\AL\include";"$(SolutionDir)\..\ExternalLibs\ttvfs";"$(SolutionDir)\..\ExternalLibs\ttvfs_cfileapi";"$(SolutionDir)\..\ExternalLibs\lvpa";"$(SolutionDir)\..\ExternalLibs\lvpa\include";"$(SolutionDir)\..\ExternalLibs""
+				AdditionalIncludeDirectories=""$(SolutionDir)\..\ExternalLibs\freetype2\include\freetype\config";"$(SolutionDir)\..\BBGE";"$(SolutionDir)\..\ExternalLibs\zlib";"$(SolutionDir)\..\ExternalLibs\png";"$(SolutionDir)\..\ExternalLibs\libogg\include";"$(SolutionDir)\..\ExternalLibs\libvorbis\include";"$(SolutionDir)\..\ExternalLibs\freetype2\include";"$(SolutionDir)\..\ExternalLibs\FTGL\include";"$(SolutionDir)\..\ExternalLibs\SDL2\include";"$(SolutionDir)\..\ExternalLibs\AL\include";"$(SolutionDir)\..\ExternalLibs\ttvfs";"$(SolutionDir)\..\ExternalLibs\ttvfs_cfileapi";"$(SolutionDir)\..\ExternalLibs\lvpa";"$(SolutionDir)\..\ExternalLibs\lvpa\include";"$(SolutionDir)\..\ExternalLibs""
 				PreprocessorDefinitions="WIN32;_DEBUG;_CONSOLE;GL_GLEXT_LEGACY=1;HAVE_PUTENV=1;FTGL_LIBRARY_STATIC;_CRT_SECURE_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;BBGE_BUILD_WINDOWS=1;VFS_ENABLE_C_API=1;BBGE_USE_GLM=1;AQUARIA_INTERNAL_FTGL=1;BBGE_BUILD_SDL2"
 				MinimalRebuild="false"
 				BasicRuntimeChecks="0"
@@ -116,7 +116,7 @@
 				FavorSizeOrSpeed="1"
 				OmitFramePointers="true"
 				EnableFiberSafeOptimizations="true"
-				AdditionalIncludeDirectories=""$(SolutionDir)\..\ExternalLibs\freetype2\include\freetype\config";"$(SolutionDir)\..\ExternalLibs\gl";"$(SolutionDir)\..\ExternalLibs\zlib";"$(SolutionDir)\..\ExternalLibs\png";"$(SolutionDir)\..\ExternalLibs\libogg\include";"$(SolutionDir)\..\ExternalLibs\libvorbis\include";"$(SolutionDir)\..\ExternalLibs\freetype2\include";"$(SolutionDir)\..\ExternalLibs\FTGL\include";"$(SolutionDir)\..\ExternalLibs\SDL2\include";"$(SolutionDir)\..\ExternalLibs\AL\include";"$(SolutionDir)\..\ExternalLibs\ttvfs";"$(SolutionDir)\..\ExternalLibs\ttvfs_cfileapi";"$(SolutionDir)\..\ExternalLibs\lvpa";"$(SolutionDir)\..\ExternalLibs\lvpa\include";"$(SolutionDir)\..\ExternalLibs""
+				AdditionalIncludeDirectories=""$(SolutionDir)\..\ExternalLibs\freetype2\include\freetype\config";"$(SolutionDir)\..\BBGE";"$(SolutionDir)\..\ExternalLibs\zlib";"$(SolutionDir)\..\ExternalLibs\png";"$(SolutionDir)\..\ExternalLibs\libogg\include";"$(SolutionDir)\..\ExternalLibs\libvorbis\include";"$(SolutionDir)\..\ExternalLibs\freetype2\include";"$(SolutionDir)\..\ExternalLibs\FTGL\include";"$(SolutionDir)\..\ExternalLibs\SDL2\include";"$(SolutionDir)\..\ExternalLibs\AL\include";"$(SolutionDir)\..\ExternalLibs\ttvfs";"$(SolutionDir)\..\ExternalLibs\ttvfs_cfileapi";"$(SolutionDir)\..\ExternalLibs\lvpa";"$(SolutionDir)\..\ExternalLibs\lvpa\include";"$(SolutionDir)\..\ExternalLibs""
 				PreprocessorDefinitions="WIN32;NDEBUG;_CONSOLE;GL_GLEXT_LEGACY=1;HAVE_PUTENV=1;FTGL_LIBRARY_STATIC;_CRT_SECURE_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;BBGE_BUILD_WINDOWS=1;_HAS_EXCEPTIONS=0;VFS_ENABLE_C_API=1;BBGE_USE_GLM=1;AQUARIA_INTERNAL_FTGL=1;BBGE_BUILD_SDL2"
 				StringPooling="true"
 				ExceptionHandling="0"

win/vc90/external.vcproj

@@ -42,7 +42,7 @@
 				Name="VCCLCompilerTool"
 				AdditionalOptions="/MP"
 				Optimization="0"
-				AdditionalIncludeDirectories=""$(SolutionDir)\..\ExternalLibs\freetype2\include\freetype\config";"$(SolutionDir)\..\ExternalLibs\gl";"$(SolutionDir)\..\ExternalLibs\zlib";"$(SolutionDir)\..\ExternalLibs\png";"$(SolutionDir)\..\ExternalLibs\libogg\include";"$(SolutionDir)\..\ExternalLibs\libvorbis\include";"$(SolutionDir)\..\ExternalLibs\freetype2\include";"$(SolutionDir)\..\ExternalLibs\FTGL\include";"$(SolutionDir)\..\ExternalLibs\SDL2\include";"$(SolutionDir)\..\ExternalLibs\ttvfs";"$(SolutionDir)\..\ExternalLibs\ttvfs_cfileapi";"$(SolutionDir)\..\ExternalLibs\""
+				AdditionalIncludeDirectories=""$(SolutionDir)\..\ExternalLibs\freetype2\include\freetype\config";"$(SolutionDir)\..\BBGE";"$(SolutionDir)\..\ExternalLibs\zlib";"$(SolutionDir)\..\ExternalLibs\png";"$(SolutionDir)\..\ExternalLibs\libogg\include";"$(SolutionDir)\..\ExternalLibs\libvorbis\include";"$(SolutionDir)\..\ExternalLibs\freetype2\include";"$(SolutionDir)\..\ExternalLibs\FTGL\include";"$(SolutionDir)\..\ExternalLibs\SDL2\include";"$(SolutionDir)\..\ExternalLibs\ttvfs";"$(SolutionDir)\..\ExternalLibs\ttvfs_cfileapi";"$(SolutionDir)\..\ExternalLibs\""
 				PreprocessorDefinitions="WIN32;_DEBUG;_CONSOLE;_CRT_SECURE_NO_WARNINGS;_CRT_SECURE_NO_DEPRECATE;HAVE_FCNTL_H;FT_CONFIG_OPTION_SYSTEM_ZLIB;FTGL_LIBRARY_STATIC;FT2_BUILD_LIBRARY;GL_GLEXT_LEGACY=1;HAVE_PUTENV=1;VFS_ENABLE_C_API=1"
 				MinimalRebuild="false"
 				BasicRuntimeChecks="0"
@@ -116,7 +116,7 @@
 				FavorSizeOrSpeed="1"
 				OmitFramePointers="true"
 				EnableFiberSafeOptimizations="true"
-				AdditionalIncludeDirectories=""$(SolutionDir)\..\ExternalLibs\freetype2\include\freetype\config";"$(SolutionDir)\..\ExternalLibs\gl";"$(SolutionDir)\..\ExternalLibs\zlib";"$(SolutionDir)\..\ExternalLibs\png";"$(SolutionDir)\..\ExternalLibs\libogg\include";"$(SolutionDir)\..\ExternalLibs\libvorbis\include";"$(SolutionDir)\..\ExternalLibs\freetype2\include";"$(SolutionDir)\..\ExternalLibs\FTGL\include";"$(SolutionDir)\..\ExternalLibs\SDL2\include";"$(SolutionDir)\..\ExternalLibs\ttvfs";"$(SolutionDir)\..\ExternalLibs\ttvfs_cfileapi";"$(SolutionDir)\..\ExternalLibs\""
+				AdditionalIncludeDirectories=""$(SolutionDir)\..\ExternalLibs\freetype2\include\freetype\config";"$(SolutionDir)\..\BBGE";"$(SolutionDir)\..\ExternalLibs\zlib";"$(SolutionDir)\..\ExternalLibs\png";"$(SolutionDir)\..\ExternalLibs\libogg\include";"$(SolutionDir)\..\ExternalLibs\libvorbis\include";"$(SolutionDir)\..\ExternalLibs\freetype2\include";"$(SolutionDir)\..\ExternalLibs\FTGL\include";"$(SolutionDir)\..\ExternalLibs\SDL2\include";"$(SolutionDir)\..\ExternalLibs\ttvfs";"$(SolutionDir)\..\ExternalLibs\ttvfs_cfileapi";"$(SolutionDir)\..\ExternalLibs\""
 
 				PreprocessorDefinitions="WIN32;NDEBUG;_CONSOLE;_CRT_SECURE_NO_WARNINGS;_CRT_SECURE_NO_DEPRECATE;HAVE_FCNTL_H;FT_CONFIG_OPTION_SYSTEM_ZLIB;FTGL_LIBRARY_STATIC;FT2_BUILD_LIBRARY;GL_GLEXT_LEGACY=1;TIXML_USE_STL=1;HAVE_PUTENV=1;_HAS_EXCEPTIONS=0;VFS_ENABLE_C_API=1"
 				StringPooling="true"
@@ -1409,22 +1409,6 @@
 					>
 				</File>
 			</Filter>
-			<Filter
-				Name="gl"
-				>
-				<File
-					RelativePath="..\..\ExternalLibs\gl\gl.h"
-					>
-				</File>
-				<File
-					RelativePath="..\..\ExternalLibs\gl\gles.h"
-					>
-				</File>
-				<File
-					RelativePath="..\..\ExternalLibs\gl\glext.h"
-					>
-				</File>
-			</Filter>
 			<Filter
 				Name="SDL"
 				>