OpenGL custom rendering

[eLaps]

Hi
Currently I'm rendering on an overlay like many programs do (xfire fraps etc making my own opengl context) but that's not as cool as rendering my own 3d vertices ingame... so I tried to figure out how to hooking glBufferDataARB & co with no success.
Does anyone succeed to render ingame with opengl like some does with DirectX (even with wine, myself running on wine)?

ps: glVertexPointer is never called. wtf?

[barthen]

You can find help here: OpenGL

People usually hook glBegin or glEnd

[eLaps]

Thanks. Looks like nobody cares about opengl.
I already managed to draw my stuff on an overlay but using the game's z-buffer is, I think, very game-specific (and unfortunately I never did it before) and not covered by any website for wow (damn directx!).
WoW draws using glDrawRangeElements but I can't find where these "elements" are stored (I expected glVertexPointer to be called but it's not :confused. glBegin and glEnd are never called.

[KOS0937]

Take a look at the import tables of WoW. There is no glBegin and glEnd - so it's no wonder that it's not called.
Here is the full list of all used opengl commands:

009DF3EC     glGenTextures                                        OPENGL32   
009DF3F0     glEnable                                             OPENGL32   
009DF3F4     glTexParameteri                                      OPENGL32   
009DF3F8     glReadPixels                                         OPENGL32   
009DF3FC     wglGetProcAddress                                    OPENGL32   
009DF400     wglDeleteContext                                     OPENGL32   
009DF404     wglMakeCurrent                                       OPENGL32   
009DF408     wglCreateContext                                     OPENGL32   
009DF40C     glBindTexture                                        OPENGL32   
009DF410     glTexImage2D                                         OPENGL32   
009DF414     glDeleteTextures                                     OPENGL32   
009DF418     glDisable                                            OPENGL32   
009DF41C     glGetError                                           OPENGL32   
009DF420     glGetIntegerv                                        OPENGL32   
009DF424     glGetString                                          OPENGL32   
009DF428     glCopyTexSubImage2D                                  OPENGL32   
009DF42C     glCopyTexImage2D                                     OPENGL32   
009DF430     wglGetCurrentDC                                      OPENGL32   
009DF434     glCullFace                                           OPENGL32   
009DF438     glBlendFunc                                          OPENGL32   
009DF43C     glMatrixMode                                         OPENGL32   
009DF440     glPolygonOffset                                      OPENGL32   
009DF444     wglGetCurrentContext                                 OPENGL32   
009DF448     glColorPointer                                       OPENGL32   
009DF44C     glTexCoordPointer                                    OPENGL32   
009DF450     glScissor                                            OPENGL32   
009DF454     glClipPlane                                          OPENGL32   
009DF458     glPolygonMode                                        OPENGL32   
009DF45C     glViewport                                           OPENGL32   
009DF460     glDepthRange                                         OPENGL32   
009DF464     glDepthMask                                          OPENGL32   
009DF468     glColorMask                                          OPENGL32   
009DF46C     glTexGeni                                            OPENGL32   
009DF470     glNormalPointer                                      OPENGL32   
009DF474     glVertexPointer                                      OPENGL32   
009DF478     glLightf                                             OPENGL32   
009DF47C     glLightfv                                            OPENGL32   
009DF480     glLightModelfv                                       OPENGL32   
009DF484     glColor4fv                                           OPENGL32   
009DF488     glMaterialfv                                         OPENGL32   
009DF48C     glLoadIdentity                                       OPENGL32   
009DF490     glLoadMatrixf                                        OPENGL32   
009DF494     glFogf                                               OPENGL32   
009DF498     glFogi                                               OPENGL32   
009DF49C     glPixelStorei                                        OPENGL32   
009DF4A0     glColorMaterial                                      OPENGL32   
009DF4A4     glLightModeli                                        OPENGL32   
009DF4A8     glTexGenfv                                           OPENGL32   
009DF4AC     glPointSize                                          OPENGL32   
009DF4B0     glFrontFace                                          OPENGL32   
009DF4B4     glDepthFunc                                          OPENGL32   
009DF4B8     glFogfv                                              OPENGL32   
009DF4BC     glAlphaFunc                                          OPENGL32   
009DF4C0     glMaterialf                                          OPENGL32   
009DF4C4     glTexSubImage2D                                      OPENGL32   
009DF4C8     glClear                                              OPENGL32   
009DF4CC     glClearColor                                         OPENGL32   
009DF4D0     wglSwapLayerBuffers                                  OPENGL32   
009DF4D4     glFinish                                             OPENGL32   
009DF4D8     glDrawArrays                                         OPENGL32   
009DF4DC     glDrawElements                                       OPENGL32   
009DF4E0     glLineWidth                                          OPENGL32   
009DF4E4     glTexEnviv                                           OPENGL32   
009DF4E8     glHint                                               OPENGL32   
009DF4EC     glTexEnvi                                            OPENGL32   
009DF4F0     glTexEnvf                                            OPENGL32   
009DF4F4     glTexEnvfv                                           OPENGL32   
009DF4F8     glEnableClientState                                  OPENGL32   
009DF4FC     glDisableClientState                                 OPENGL32   
009DF500     glGetFloatv                                          OPENGL32

glFinish looks most promising to me. also glDrawElements and glDrawArrays are probably called every frame.

I don't know enough about opengl to help you any further, but i hope this gives you a kick in the right direction =)

[JuJuBoSc]

On CS 1.6 I hooked glClear for my rendering stuff

[Apoc]

glClear is called multiple times by WoW, per frame. So it's probably not the best func to hook.

[eLaps]

Thanks for the replies...

Here is the full list of all used opengl commands:

Thanks but actually this is not the full list, opengl extensions are also used (GL_ARB_point_sprite, GL_EXT_framebuffer_object, ...).
This is an exhaustive list of the opengl functions requested with glXGetProcAddressARB under wine (the majority isn't used though; on Windows it must be the same with the wgl* equivalents for glX*):

glAccum
glActiveStencilFaceEXT
glActiveTextureARB
glAlphaFunc
glAreTexturesResident
glArrayElement
glAttachObjectARB
glBegin
glBeginQueryARB
glBindAttribLocationARB
glBindBufferARB
glBindFragDataLocationEXT
glBindFramebuffer
glBindFramebufferEXT
glBindProgramARB
glBindRenderbuffer
glBindRenderbufferEXT
glBindTexture
glBitmap
glBlendColorEXT
glBlendEquationEXT
glBlendEquationSeparateEXT
glBlendFunc
glBlendFuncSeparateEXT
glBlitFramebuffer
glBlitFramebufferEXT
glBufferDataARB
glBufferSubDataARB
glCallList
glCallLists
glCheckFramebufferStatus
glCheckFramebufferStatusEXT
glClampColorARB
glClear
glClearAccum
glClearColor
glClearDepth
glClearIndex
glClearStencil
glClientActiveTextureARB
glClientWaitSync
glClipPlane
glColor3b
glColor3bv
glColor3d
glColor3dv
glColor3f
glColor3fv
glColor3hNV
glColor3hvNV
glColor3i
glColor3iv
glColor3s
glColor3sv
glColor3ub
glColor3ubv
glColor3ui
glColor3uiv
glColor3us
glColor3usv
glColor4b
glColor4bv
glColor4d
glColor4dv
glColor4f
glColor4fv
glColor4hNV
glColor4hvNV
glColor4i
glColor4iv
glColor4s
glColor4sv
glColor4ub
glColor4ubv
glColor4ui
glColor4uiv
glColor4us
glColor4usv
glColorMask
glColorMaskIndexedEXT
glColorMaterial
glColorPointer
glCombinerInputNV
glCombinerOutputNV
glCombinerParameterfNV
glCombinerParameterfvNV
glCombinerParameteriNV
glCombinerParameterivNV
glCombinerStageParameterfvNV
glCompileShaderARB
glCompressedTexImage2DARB
glCompressedTexImage3DARB
glCompressedTexSubImage2DARB
glCompressedTexSubImage3DARB
glCopyPixels
glCopyTexImage1D
glCopyTexImage2D
glCopyTexSubImage1D
glCopyTexSubImage2D
glCreateProgramObjectARB
glCreateShaderObjectARB
glCullFace
glDeleteBuffersARB
glDeleteFencesNV
glDeleteFramebuffers
glDeleteFramebuffersEXT
glDeleteLists
glDeleteObjectARB
glDeleteProgramsARB
glDeleteQueriesARB
glDeleteRenderbuffers
glDeleteRenderbuffersEXT
glDeleteSync
glDeleteTextures
glDepthFunc
glDepthMask
glDepthRange
glDetachObjectARB
glDisable
glDisableClientState
glDisableIndexedEXT
glDisableVertexAttribArrayARB
glDrawArrays
glDrawBuffer
glDrawBuffersARB
glDrawElements
glDrawPixels
glDrawRangeElementsEXT
glEdgeFlag
glEdgeFlagPointer
glEdgeFlagv
glEnable
glEnableClientState
glEnableIndexedEXT
glEnableVertexAttribArrayARB
glEnd
glEndList
glEndQueryARB
glEvalCoord1d
glEvalCoord1dv
glEvalCoord1f
glEvalCoord1fv
glEvalCoord2d
glEvalCoord2dv
glEvalCoord2f
glEvalCoord2fv
glEvalMesh1
glEvalMesh2
glEvalPoint1
glEvalPoint2
glFeedbackBuffer
glFenceSync
glFinalCombinerInputNV
glFinish
glFinishFenceNV
glFlush
glFlushMappedBufferRange
glFogCoorddEXT
glFogCoorddvEXT
glFogCoordfEXT
glFogCoordfvEXT
glFogCoordhNV
glFogCoordhvNV
glFogCoordPointerEXT
glFogf
glFogfv
glFogi
glFogiv
glFramebufferRenderbuffer
glFramebufferRenderbufferEXT
glFramebufferTexture1D
glFramebufferTexture1DEXT
glFramebufferTexture2D
glFramebufferTexture2DEXT
glFramebufferTexture3D
glFramebufferTexture3DEXT
glFramebufferTextureARB
glFramebufferTextureFaceARB
glFramebufferTextureLayer
glFramebufferTextureLayerARB
glFrontFace
glFrustum
glGenBuffersARB
glGenerateMipmap
glGenerateMipmapEXT
glGenFencesNV
glGenFramebuffers
glGenFramebuffersEXT
glGenLists
glGenProgramsARB
glGenQueriesARB
glGenRenderbuffers
glGenRenderbuffersEXT
glGenTextures
glGetActiveUniformARB
glGetAttachedObjectsARB
glGetAttribLocationARB
glGetBooleanIndexedvEXT
glGetBooleanv
glGetBufferParameterivARB
glGetBufferPointervARB
glGetBufferSubDataARB
glGetClipPlane
glGetCompressedTexImageARB
glGetDoublev
glGetError
glGetFenceivNV
glGetFloatv
glGetFragDataLocationEXT
glGetFramebufferAttachmentParameteriv
glGetFramebufferAttachmentParameterivEXT
glGetHandleARB
glGetInfoLogARB
glGetInteger64v
glGetIntegerIndexedvEXT
glGetIntegerv
glGetLightfv
glGetLightiv
glGetMapdv
glGetMapfv
glGetMapiv
glGetMaterialfv
glGetMaterialiv
glGetObjectParameterfvARB
glGetObjectParameterivARB
glGetPixelMapfv
glGetPixelMapuiv
glGetPixelMapusv
glGetPointerv
glGetPolygonStipple
glGetProgramivARB
glGetQueryivARB
glGetQueryObjectivARB
glGetQueryObjectuivARB
glGetRenderbufferParameteriv
glGetRenderbufferParameterivEXT
glGetShaderSourceARB
glGetString
glGetSynciv
glGetTexEnvfv
glGetTexEnviv
glGetTexGendv
glGetTexGenfv
glGetTexGeniv
glGetTexImage
glGetTexLevelParameterfv
glGetTexLevelParameteriv
glGetTexParameterfv
glGetTexParameteriv
glGetUniformfvARB
glGetUniformivARB
glGetUniformLocationARB
glGetUniformuivEXT
glHint
glIndexd
glIndexdv
glIndexf
glIndexfv
glIndexi
glIndexiv
glIndexMask
glIndexPointer
glIndexs
glIndexsv
glIndexub
glIndexubv
glInitNames
glInterleavedArrays
glIsBufferARB
glIsEnabled
glIsEnabledIndexedEXT
glIsFenceNV
glIsFramebuffer
glIsFramebufferEXT
glIsList
glIsProgramARB
glIsRenderbuffer
glIsRenderbufferEXT
glIsSync
glIsTexture
glLightf
glLightfv
glLighti
glLightiv
glLightModelf
glLightModelfv
glLightModeli
glLightModeliv
glLineStipple
glLineWidth
glLinkProgramARB
glListBase
glLoadIdentity
glLoadMatrixd
glLoadMatrixf
glLoadName
glLockArraysEXT
glLogicOp
glMap1d
glMap1f
glMap2d
glMap2f
glMapBufferARB
glMapBufferRange
glMapGrid1d
glMapGrid1f
glMapGrid2d
glMapGrid2f
glMaterialf
glMaterialfv
glMateriali
glMaterialiv
glMatrixMode
glMultiTexCoord1fARB
glMultiTexCoord1fvARB
glMultiTexCoord1hNV
glMultiTexCoord1hvNV
glMultiTexCoord2fARB
glMultiTexCoord2fvARB
glMultiTexCoord2hNV
glMultiTexCoord2hvNV
glMultiTexCoord2svARB
glMultiTexCoord3fARB
glMultiTexCoord3fvARB
glMultiTexCoord3hNV
glMultiTexCoord3hvNV
glMultiTexCoord4fARB
glMultiTexCoord4fvARB
glMultiTexCoord4hNV
glMultiTexCoord4hvNV
glMultiTexCoord4svARB
glMultMatrixd
glMultMatrixf
glNewList
glNormal3b
glNormal3bv
glNormal3d
glNormal3dv
glNormal3f
glNormal3fv
glNormal3hNV
glNormal3hvNV
glNormal3i
glNormal3iv
glNormal3s
glNormal3sv
glNormalPointer
glOrtho
glPassThrough
glPixelMapfv
glPixelMapuiv
glPixelMapusv
glPixelStoref
glPixelStorei
glPixelTransferf
glPixelTransferi
glPixelZoom
glPointParameterfARB
glPointParameterfEXT
glPointParameterfv
glPointParameterfvARB
glPointParameterfvEXT
glPointParameteri
glPointSize
glPolygonMode
glPolygonOffset
glPolygonStipple
glPopAttrib
glPopClientAttrib
glPopMatrix
glPopName
glPrioritizeTextures
glProgramEnvParameter4fvARB
glProgramEnvParameters4fvEXT
glProgramLocalParameter4fvARB
glProgramLocalParameters4fvEXT
glProgramParameteriARB
glProgramStringARB
glProvokingVertex
glProvokingVertexEXT
glPushAttrib
glPushClientAttrib
glPushMatrix
glPushName
glRasterPos2d
glRasterPos2dv
glRasterPos2f
glRasterPos2fv
glRasterPos2i
glRasterPos2iv
glRasterPos2s
glRasterPos2sv
glRasterPos3d
glRasterPos3dv
glRasterPos3f
glRasterPos3fv
glRasterPos3i
glRasterPos3iv
glRasterPos3s
glRasterPos3sv
glRasterPos4d
glRasterPos4dv
glRasterPos4f
glRasterPos4fv
glRasterPos4i
glRasterPos4iv
glRasterPos4s
glRasterPos4sv
glReadBuffer
glReadPixels
glRectd
glRectdv
glRectf
glRectfv
glRecti
glRectiv
glRects
glRectsv
glRenderbufferStorage
glRenderbufferStorageEXT
glRenderbufferStorageMultisample
glRenderbufferStorageMultisampleEXT
glRenderMode
glRotated
glRotatef
glSampleCoverageARB
glScaled
glScalef
glScissor
glSecondaryColor3fEXT
glSecondaryColor3fvEXT
glSecondaryColor3hNV
glSecondaryColor3hvNV
glSecondaryColor3ubEXT
glSecondaryColor3ubvEXT
glSecondaryColorPointerEXT
glSelectBuffer
glSetFenceNV
glShadeModel
glShaderSourceARB
glStencilFunc
glStencilMask
glStencilOp
glTestFenceNV
glTexCoord1d
glTexCoord1dv
glTexCoord1f
glTexCoord1fv
glTexCoord1hNV
glTexCoord1hvNV
glTexCoord1i
glTexCoord1iv
glTexCoord1s
glTexCoord1sv
glTexCoord2d
glTexCoord2dv
glTexCoord2f
glTexCoord2fv
glTexCoord2hNV
glTexCoord2hvNV
glTexCoord2i
glTexCoord2iv
glTexCoord2s
glTexCoord2sv
glTexCoord3d
glTexCoord3dv
glTexCoord3f
glTexCoord3fv
glTexCoord3hNV
glTexCoord3hvNV
glTexCoord3i
glTexCoord3iv
glTexCoord3s
glTexCoord3sv
glTexCoord4d
glTexCoord4dv
glTexCoord4f
glTexCoord4fv
glTexCoord4hNV
glTexCoord4hvNV
glTexCoord4i
glTexCoord4iv
glTexCoord4s
glTexCoord4sv
glTexCoordPointer
glTexEnvf
glTexEnvfv
glTexEnvi
glTexEnviv
glTexGend
glTexGendv
glTexGenf
glTexGenfv
glTexGeni
glTexGeniv
glTexImage1D
glTexImage2D
glTexImage3DEXT
glTexParameterf
glTexParameterfv
glTexParameteri
glTexParameteriv
glTexSubImage1D
glTexSubImage2D
glTexSubImage3DEXT
glTranslated
glTranslatef
glUniform1fARB
glUniform1fvARB
glUniform1iARB
glUniform1ivARB
glUniform1uiEXT
glUniform1uivEXT
glUniform2fARB
glUniform2fvARB
glUniform2iARB
glUniform2ivARB
glUniform2uiEXT
glUniform2uivEXT
glUniform3fARB
glUniform3fvARB
glUniform3iARB
glUniform3ivARB
glUniform3uiEXT
glUniform3uivEXT
glUniform4fARB
glUniform4fvARB
glUniform4iARB
glUniform4ivARB
glUniform4uiEXT
glUniform4uivEXT
glUniformMatrix2fvARB
glUniformMatrix3fvARB
glUniformMatrix4fvARB
glUnlockArraysEXT
glUnmapBufferARB
glUseProgramObjectARB
glValidateProgramARB
glVertex2d
glVertex2dv
glVertex2f
glVertex2fv
glVertex2hNV
glVertex2hvNV
glVertex2i
glVertex2iv
glVertex2s
glVertex2sv
glVertex3d
glVertex3dv
glVertex3f
glVertex3fv
glVertex3hNV
glVertex3hvNV
glVertex3i
glVertex3iv
glVertex3s
glVertex3sv
glVertex4d
glVertex4dv
glVertex4f
glVertex4fv
glVertex4hNV
glVertex4hvNV
glVertex4i
glVertex4iv
glVertex4s
glVertex4sv
glVertexAttrib1dARB
glVertexAttrib1dvARB
glVertexAttrib1fARB
glVertexAttrib1fvARB
glVertexAttrib1hNV
glVertexAttrib1hvNV
glVertexAttrib1sARB
glVertexAttrib1svARB
glVertexAttrib2dARB
glVertexAttrib2dvARB
glVertexAttrib2fARB
glVertexAttrib2fvARB
glVertexAttrib2hNV
glVertexAttrib2hvNV
glVertexAttrib2sARB
glVertexAttrib2svARB
glVertexAttrib3dARB
glVertexAttrib3dvARB
glVertexAttrib3fARB
glVertexAttrib3fvARB
glVertexAttrib3hNV
glVertexAttrib3hvNV
glVertexAttrib3sARB
glVertexAttrib3svARB
glVertexAttrib4bvARB
glVertexAttrib4dARB
glVertexAttrib4dvARB
glVertexAttrib4fARB
glVertexAttrib4fvARB
glVertexAttrib4hNV
glVertexAttrib4hvNV
glVertexAttrib4ivARB
glVertexAttrib4NbvARB
glVertexAttrib4NivARB
glVertexAttrib4NsvARB
glVertexAttrib4NubARB
glVertexAttrib4NubvARB
glVertexAttrib4NuivARB
glVertexAttrib4NusvARB
glVertexAttrib4sARB
glVertexAttrib4svARB
glVertexAttrib4ubvARB
glVertexAttrib4uivARB
glVertexAttrib4usvARB
glVertexAttribI1iEXT
glVertexAttribI1ivEXT
glVertexAttribI1uiEXT
glVertexAttribI1uivEXT
glVertexAttribI2iEXT
glVertexAttribI2ivEXT
glVertexAttribI2uiEXT
glVertexAttribI2uivEXT
glVertexAttribI3iEXT
glVertexAttribI3ivEXT
glVertexAttribI3uiEXT
glVertexAttribI3uivEXT
glVertexAttribI4bvEXT
glVertexAttribI4iEXT
glVertexAttribI4ivEXT
glVertexAttribI4svEXT
glVertexAttribI4ubvEXT
glVertexAttribI4uiEXT
glVertexAttribI4uivEXT
glVertexAttribI4usvEXT
glVertexAttribIivEXT
glVertexAttribIPointerEXT
glVertexAttribIuivEXT
glVertexAttribPointerARB
glVertexAttribs1hvNV
glVertexAttribs2hvNV
glVertexAttribs3hvNV
glVertexAttribs4hvNV
glVertexPointer
glVertexWeighthNV
glVertexWeighthvNV
glViewport
glWaitSync
glXAllocateMemoryNV
glXChooseFBConfig
glXChooseVisual
glXCopyContext
glXCreateContext
glXCreateContextAttribsARB
glXCreateGLXPixmap
glXCreateNewContext
glXCreatePbuffer
glXDestroyContext
glXDestroyGLXPixmap
glXDestroyPbuffer
glXFreeMemoryNV
glXGetClientString
glXGetConfig
glXGetCurrentContext
glXGetCurrentDrawable
glXGetCurrentReadDrawable
glXGetFBConfigAttrib
glXGetFBConfigs
glXGetVisualFromFBConfig
glXIsDirect
glXMakeContextCurrent
glXMakeCurrent
glXQueryDrawable
glXQueryExtension
glXQueryExtensionsString
glXQueryServerString
glXQueryVersion
glXSwapBuffers
glXUseXFont

glClear is called multiple times by WoW, per frame. So it's probably not the best func to hook.

3 times per frame, yes. I hook glXSwapBuffers but checking when (!(ncalls%3)) in glClear does the same.
[edit: correction, not always 3 times]

Now I'm here:
Under wine, the cursor is rendered with glVertexPointer + glDrawArrays (under wine atleast).
Everything else is rendered with VBOs. Every object in the game has its buffer in the VRAM, and every buffer has an id.
glBindBuffer is called to "select" a buffer before glDrawRangeElementsEXT is called to render it (again, under wine). Not so complicated...
If I only render buffers with id < 150:


ps: The tower being partially rendered, so it's obviously be a bit more complicated than "one object per buffer".

[KOS0937]

It's possible, that wine uses some functions on it's own (for example to render the cursor?).

I doubt that WoW dynamically links some openGL functions after importing most of them via import-table at program start-up. So as far as i can tell my list really is exhaustive.

Your progress looks nice so far. I might come back to you should I want to display something ingame (oGL > dx :P ). So far i'm still at a conceptual stage of my (new) bot though xD

EDIT: looks to me like wine simply requests every single oGL function to be able to offer it in the virtual machine...

[eLaps]

With the functions of your list, you can't store graphics in the vram and Wow does, the fps wouldn't exceed like 10fps otherwise. You can't use shaders too.
This is a list of opengl-related strings found with IDA, it's possible I missed some:

 
aGlactivetextur                                      00A2F164    
aGl_arb_fragmen                                      00A2EDA0   
aGl_arb_multisa                                      00A2EBF0   
aGl_arb_multite                                      00A2F178   
aGl_arb_occlusi                                      00A2EB88   
aGl_arb_point_p                                      00A2EAEC   
aGl_arb_point_s                                      00A2EAA8   
aGl_arb_textu_0                                      00A2EEF8   
aGl_arb_textu_1                                      00A2EC04   
aGl_arb_textu_2                                      00A2EBD4   
aGl_arb_texture                                      00A2F0D0   
aGl_arb_verte_0                                      00A2ECF4   
aGl_arb_vertex_                                      00A2EFC4   
aGl_ati_envmap_                                      00A2EDB8   
aGl_ati_fragmen                                      00A2EDD0   
aGlbeginqueryar                                      00A2EB54   
aGlbindbufferar                                      00A2EFB4   
aGlbindframebuf                                      00A2E9EC   
aGlbindprograma                                      00A2ED78   
aGlbindrenderbu                                      00A2EA54   
aGlblendcolorex                                      00A2E908   
aGlbufferdataar                                      00A2EF80   
aGlbuffersubdat                                      00A2EF6C   
aGlcheckframebu                                      00A2E9A0   
aGlclientactive                                      00A2F148   
aGlcombinerinpu                                      00A2EEC8   
aGlcombineroutp                                      00A2EEB4   
aGlcombinerpa_0                                      00A2EE6C   
aGlcombinerpara                                      00A2EE84   
aGlcombinerstag                                      00A2EE30   
aGlcompressed_0                                      00A2F094   
aGlcompressed_1                                      00A2F05C   
aGlcompressed_2                                      00A2F03C   
aGlcompressedte                                      00A2F0B4   
aGldeletebuffer                                      00A2EFA0   
aGldeleteframeb                                      00A2E9D4   
aGldeleteprogra                                      00A2ED44   
aGldeletequerie                                      00A2EB64   
aGldeleterender                                      00A2EA38   
aGldisableverte                                      00A2EC98   
aGldrawrangeele                                      00A2EF14   
aGlenablevertex                                      00A2ECB8   
aGlendqueryarb                                       00A2EB44   
aGl_ext_bgra                                         00A2F13C   
aGl_ext_blend_c                                      00A2E918   
aGl_ext_compile                                      00A2F1B0   
aGl_ext_draw_ra                                      00A2EF2C   
aGl_ext_frame_0                                      00A2EA6C   
aGl_ext_framebu                                      00A2EA8C   
aGl_ext_gpu_pro                                      00A2EC5C   
aGl_ext_textu_0                                      00A2F0EC   
aGl_ext_textu_1                                      00A2F078   
aGl_ext_textu_2                                      00A2F01C   
aGl_ext_textu_3                                      00A2EFE0   
aGl_ext_textu_4                                      00A2EBB8   
aGl_ext_texture                                      00A2F104   
aGlfinalcombine                                      00A2EE9C   
aGlframebuffe_0                                      00A2E968   
aGlframebuffe_1                                      00A2E94C   
aGlframebufferr                                      00A2E92C   
aGlframebuffert                                      00A2E984   
aGlgenbuffersar                                      00A2EF90   
aGlgenframebuff                                      00A2E9BC   
aGlgenprogramsa                                      00A2ED30   
aGlgenqueriesar                                      00A2EB78   
aGlgenrenderbuf                                      00A2EA20   
aGlgetprogramiv                                      00A2ED0C   
aGlgetqueryivar                                      00A2EB34   
aGlgetqueryob_0                                      00A2EB04   
aGlgetqueryobje                                      00A2EB1C   
aGlisprogramarb                                      00A2ED20   
aGllockarraysex                                      00A2F1A0   
aGlmapbufferarb                                      00A2EF5C   
aGl_nv_regist_0                                      00A2EE50   
aGl_nv_register                                      00A2EEDC   
aGl_nv_textur_0                                      00A2EE00   
aGl_nv_textur_1                                      00A2EDE8   
aGl_nv_textur_2                                      00A2EBA0   
aGl_nv_texture_                                      00A2EE18   
aGlpointparam_0                                      00A2EABC   
aGlpointparamet                                      00A2EAD4   
aGlprogramenv_0                                      00A2EC3C   
aGlprogramenvpa                                      00A2EC7C   
aGlprogramloc_0                                      00A2EC1C   
aGlprogramlocal                                      00A2ED58   
aGlprogramstrin                                      00A2ED8C   
aGlrenderbuffer                                      00A2EA04   
aGl_sgis_genera                                      00A2F004   
aGl_sgis_textur                                      00A2F120    
aGlunlockarrays                                      00A2F18C   
aGlunmapbuffera                                      00A2EF48   
aGlvertexattrib                                      00A2ECD8   

glAlphaFunc                                          009DF4BC   
glBindTexture                                        009DF40C   
glBlendFunc                                          009DF438   
glClear                                              009DF4C8   
glClearColor                                         009DF4CC   
glClipPlane                                          009DF454   
glColor4fv                                           009DF484   
glColorMask                                          009DF468   
glColorMaterial                                      009DF4A0   
glColorPointer                                       009DF448   
glCopyTexImage2D                                     009DF42C   
glCopyTexSubImage2D                                  009DF428   
glCullFace                                           009DF434   
glDeleteTextures                                     009DF414   
glDepthFunc                                          009DF4B4   
glDepthMask                                          009DF464   
glDepthRange                                         009DF460   
glDisable                                            009DF418   
glDisableClientState                                 009DF4FC   
glDrawArrays                                         009DF4D8   
glDrawElements                                       009DF4DC   
glEnable                                             009DF3F0   
glEnableClientState                                  009DF4F8   
glFinish                                             009DF4D4   
glFogf                                               009DF494   
glFogfv                                              009DF4B8   
glFogi                                               009DF498   
glFrontFace                                          009DF4B0   
glGenTextures                                        009DF3EC   
glGetError                                           009DF41C   
glGetFloatv                                          009DF500   
glGetIntegerv                                        009DF420   
glGetString                                          009DF424   
glHint                                               009DF4E8   
glLightf                                             009DF478   
glLightfv                                            009DF47C   
glLightModelfv                                       009DF480   
glLightModeli                                        009DF4A4   
glLineWidth                                          009DF4E0   
glLoadIdentity                                       009DF48C   
glLoadMatrixf                                        009DF490   
glMaterialf                                          009DF4C0   
glMaterialfv                                         009DF488   
glMatrixMode                                         009DF43C   
glNormalPointer                                      009DF470   
glPixelStorei                                        009DF49C   
glPointSize                                          009DF4AC   
glPolygonMode                                        009DF458   
glPolygonOffset                                      009DF440   
glReadPixels                                         009DF3F8   
glScissor                                            009DF450   
glTexCoordPointer                                    009DF44C   
glTexEnvf                                            009DF4F0   
glTexEnvfv                                           009DF4F4   
glTexEnvi                                            009DF4EC   
glTexEnviv                                           009DF4E4   
glTexGenfv                                           009DF4A8   
glTexGeni                                            009DF46C   
glTexImage2D                                         009DF410   
glTexParameteri                                      009DF3F4   
glTexSubImage2D                                      009DF4C4   
glVertexPointer                                      009DF474   
glViewport                                           009DF45C   
wglCreateContext                                     009DF408   
wglDeleteContext                                     009DF400   
wglGetCurrentContext                                 009DF444   
wglGetCurrentDC                                      009DF430   
wglGetProcAddress                                    009DF3FC   
wglMakeCurrent                                       009DF404   
wglSwapLayerBuffers                                  009DF4D0

Your list doesn't feature OpenGL extensions' functions.

Now I need to find how matrices are used (glTranslatef/glLoadMatrixf/glLoadIdentity/... are never called ).

[RoKFenris]

If you are able to run WoW under Wine, set the environment variable "WINEDEBUG=-all,wgl,opengl". You will get every called OpenGL command on the terminal, complete with parameters, making it way easier to understand how WoW draws things (although the reported pointers might be almost useless if you are not debugging in real time).

BTW, it's quite obvious that a single object might require more than one VBO. AFAIK, each VBO can only have a single "material" (set of shaders and textures) applied to it, so (for example) a wooden stair inside a stone building would probably use a different VBO than the building itself.

[KOS0937]

Ah ok. I wasn't well aware of the use of wglGetProcAddress to get the extensions functions. Strange design that those guys of openGL chose there

[eLaps]

uh opengl doesn't use matrices but vertex programs to define positions and rotations.
It looks like

!!ARBvp1.0

PARAM c[223]={  { 0, 1, 3 },
        program.env[1..222]  };
TEMP R0;
TEMP R1;
TEMP R2;
ADDRESS A0;
FLR R0.x, vertex.attrib[2];
MUL R0.x, R0, c[0].z;
ARL A0.x, R0.x;
DP4 R2.x, vertex.attrib[0], c[A0.x + 33];
DP4 R1.x, c[A0.x + 31], vertex.attrib[0];
DP4 R1.y, vertex.attrib[0], c[A0.x + 32];
MOV R1.w, c[0].y;
MOV R1.z, R2.x;
DP3 R0.x, c[A0.x + 31], vertex.attrib[3];
DP3 R0.z, c[A0.x + 33], vertex.attrib[3];
DP3 R0.y, c[A0.x + 32], vertex.attrib[3];
DP3 R0.w, R0, R0;
RSQ R0.w, R0.w;
MUL R0.xyz, R0.w, R0;
DP3 R0.x, R0, -c[12];
MIN R0.x, R0, c[0].y;
MAX R0.x, R0, c[0];
MUL R0.xyz, R0.x, c[10];
ADD R0.xyz, R0, c[11];
MIN R0.xyz, R0, c[0].y;
DP4 result.position.w, R1, c[5];
MOV R0.w, c[0].y;
MAX R0.xyz, R0, c[0].x;
MUL R0, R0, c[28];
ADD R0, R0, c[29];
MIN R0, R0, c[0].y;
MAX result.color, R0, c[0].x;
MOV R0.zw, c[0].xyxy;
MOV R0.xy, vertex.attrib[6];
DP4 result.texcoord[0].y, R0, c[7];
DP4 result.texcoord[0].x, R0, c[6];
MOV R0.xy, vertex.attrib[7];
MOV R0.zw, c[0].xyxy;
DP4 result.position.z, R1, c[4];
DP4 result.position.y, R1, c[3];
DP4 result.position.x, R1, c[2];
MAD R1.x, R2, c[30], c[30].y;
DP4 result.texcoord[1].y, R0, c[9];
MAX R1.x, R1, c[0];
DP4 result.texcoord[1].x, R0, c[8];
POW R0.x, R1.x, c[30].z;
MIN R0.x, R0, c[0].y;
MOV result.texcoord[0].zw, c[0].xyxy;
MOV result.texcoord[1].zw, c[0].xyxy;
MAX result.fogcoord.x, R0, c[0];
END

Not funny.

set the environment variable "WINEDEBUG=-all,wgl,opengl".

ha yes thank you

[RoKFenris]

uh opengl doesn't use matrices but vertex programs to define positions and rotations.
It looks like

!!ARBvp1.0

PARAM c[223]={  { 0, 1, 3 },
        program.env[1..222]  };
TEMP R0;
TEMP R1;
TEMP R2;
ADDRESS A0;
FLR R0.x, vertex.attrib[2];
MUL R0.x, R0, c[0].z;
ARL A0.x, R0.x;
DP4 R2.x, vertex.attrib[0], c[A0.x + 33];
DP4 R1.x, c[A0.x + 31], vertex.attrib[0];
DP4 R1.y, vertex.attrib[0], c[A0.x + 32];
MOV R1.w, c[0].y;
MOV R1.z, R2.x;
DP3 R0.x, c[A0.x + 31], vertex.attrib[3];
DP3 R0.z, c[A0.x + 33], vertex.attrib[3];
DP3 R0.y, c[A0.x + 32], vertex.attrib[3];
DP3 R0.w, R0, R0;
RSQ R0.w, R0.w;
MUL R0.xyz, R0.w, R0;
DP3 R0.x, R0, -c[12];
MIN R0.x, R0, c[0].y;
MAX R0.x, R0, c[0];
MUL R0.xyz, R0.x, c[10];
ADD R0.xyz, R0, c[11];
MIN R0.xyz, R0, c[0].y;
DP4 result.position.w, R1, c[5];
MOV R0.w, c[0].y;
MAX R0.xyz, R0, c[0].x;
MUL R0, R0, c[28];
ADD R0, R0, c[29];
MIN R0, R0, c[0].y;
MAX result.color, R0, c[0].x;
MOV R0.zw, c[0].xyxy;
MOV R0.xy, vertex.attrib[6];
DP4 result.texcoord[0].y, R0, c[7];
DP4 result.texcoord[0].x, R0, c[6];
MOV R0.xy, vertex.attrib[7];
MOV R0.zw, c[0].xyxy;
DP4 result.position.z, R1, c[4];
DP4 result.position.y, R1, c[3];
DP4 result.position.x, R1, c[2];
MAD R1.x, R2, c[30], c[30].y;
DP4 result.texcoord[1].y, R0, c[9];
MAX R1.x, R1, c[0];
DP4 result.texcoord[1].x, R0, c[8];
POW R0.x, R1.x, c[30].z;
MIN R0.x, R0, c[0].y;
MOV result.texcoord[0].zw, c[0].xyxy;
MOV result.texcoord[1].zw, c[0].xyxy;
MAX result.fogcoord.x, R0, c[0];
END

Not funny.

You should be able to extract the object's position (and camera, fog, etc) from the beginning of the array passed as the last argument to wine_glProgramEnvParameters4fvEXT calls. If I remember correctly, those general parameters should always be among the first floats on the passed array, as well as on the same position for all (or almost all) used vertex shaders, although I did my reversing a long time ago, so things could have changed.

[Sednogmah]

If you are able to run WoW under Wine, set the environment variable "WINEDEBUG=-all,wgl,opengl". You will get every called OpenGL command on the terminal, complete with parameters, making it way easier to understand how WoW draws things (although the reported pointers might be almost useless if you are not debugging in real time).

Generally useful for debugging with WINE: DebugChannels - The Official Wine Wiki

---
Interesting although I've not yet actually tried it: NVIDIA PerfKit. It contains various OpenGL debugging tools and performance monitors, including GLExpert:

• VBOs: show where buffers reside along with mapping details

PerfKit requires the contained "instrumented" drivers and is available for x86 and x86_64 Linux & Windows.

[eLaps]

Again, thanks for your help but I was too lazy to inspect these GLSL codes and instead I tried stuff in my opengl context, without taking care of what wow does to render. I finally got my code to render ingame, with the zbuffer working (overlay mode is still available tho) and without hiding the interface! amazing!
If ppl are interested I'll probably make a new thread with some code.