5 replies to this topic

[Julio]

I'm trying to implement compiled vertex arrays in my engine. my first attempt failed, and my second attempt won't even run. I've borrowed initialization code from glVelocity, and when I get it working I plan on rewriting it. anyways, the cva's won't initialize. my hardware Geforce 256) has the correct extension and is capable of cva's. is there anything wrong in the code?

GLLOCKARRAYSEXTPROC m_glLockArraysEXT = 0; GLUNLOCKARRAYSEXTPROC m_glUnlockArraysEXT = 0; GLARRAYELEMENTEXTPROC m_glArrayElementEXT = 0; GLCOLORPOINTEREXTPROC m_glColorPointerEXT = 0; GLDRAWARRAYSEXTPROC m_glDrawArraysEXT = 0; GLEDGEFLAGPOINTEREXTPROC m_glEdgeFlagPointerEXT= 0; GLGETPOINTERVEXTPROC m_glGetPointervEXT= 0; GLINDEXPOINTEREXTPROC m_glIndexPointerEXT = 0; GLNORMALPOINTEREXTPROC m_glNormalPointerEXT= 0; GLTEXCOORDPOINTEREXTPROC m_glTexCoordPointerEXT= 0; GLVERTEXPOINTEREXTPROC m_glVertexPointerEXT= 0; GLCLIENTACTIVETEXTUREARBPROC m_glClientActiveTextureARB = 0; and the initialization: m_glArrayElementEXT = (GLARRAYELEMENTEXTPROC) wglGetProcAddress("glArrayElementEXT"); m_glColorPointerEXT = (GLCOLORPOINTEREXTPROC) wglGetProcAddress("glColorPointerEXT"); m_glDrawArraysEXT = (GLDRAWARRAYSEXTPROC) wglGetProcAddress("glDrawArraysEXT"); m_glEdgeFlagPointerEXT = (GLEDGEFLAGPOINTEREXTPROC) wglGetProcAddress("glEdgeFlagPointerEXT"); m_glGetPointervEXT = (GLGETPOINTERVEXTPROC) wglGetProcAddress("glGetPointervEXT"); m_glIndexPointerEXT = (GLINDEXPOINTEREXTPROC) wglGetProcAddress("glIndexPointerEXT"); m_glNormalPointerEXT = (GLNORMALPOINTEREXTPROC) wglGetProcAddress("glNormalPointerEXT"); m_glTexCoordPointerEXT = (GLTEXCOORDPOINTEREXTPROC) wglGetProcAddress("glTexCoordPointerEXT"); m_glVertexPointerEXT = (GLVERTEXPOINTEREXTPROC) wglGetProcAddress("glVertexPointerEXT"); if (m_glArrayElementEXT == 0 || m_glColorPointerEXT == 0 || //here is returns false, everything is 0 m_glDrawArraysEXT == 0 || m_glEdgeFlagPointerEXT == 0 || m_glGetPointervEXT == 0 || m_glIndexPointerEXT == 0 || m_glNormalPointerEXT == 0 || m_glTexCoordPointerEXT == 0 || m_glVertexPointerEXT == 0) { return false; } m_glLockArraysEXT = (GLLOCKARRAYSEXTPROC) wglGetProcAddress("glLockArraysEXT"); m_glUnlockArraysEXT = (GLUNLOCKARRAYSEXTPROC) wglGetProcAddress("glUnlockArraysEXT"); if (m_glLockArraysEXT == 0 || m_glUnlockArraysEXT == 0) return false; m_glClientActiveTextureARB = (GLACTIVETEXTUREARBPROC) wglGetProcAddress("glClientActiveTextureARB"); if (m_glClientActiveTextureARB == 0) return false; return true;

Everything compiles fine. yes, I have glext.h linked to it. if anybody might know what's wrong that'd be great. thanks, Joe Never underestimante the power of stupid people in large groups. Edited by - Julio on July 30, 2001 9:40:09 PM

[Obelix]

Almost all of the functions is already a part of OpenGL 1.1 so no need to get the addresses. You are using prototypes like
GLLOCKARRAYSEXTPROC m_glLockArraysEXT = 0;
but my glext.h would like
PFNGLLOCKARRAYSEXTPROC m_glLockArraysEXT =0;

In the last one are you using (GLACTIVETEXTUREARBPROC) with wglGetProcAddress("glClientActiveTextureARB") but probably meant wglGetProcAddress("glActiveTextureARB").

[Julio]

well, all of those are defined in glext.h. why don''t I need to get the proc address? could you explain more?
thanks,
Joe


Never underestimante the power of stupid people in large groups.

[Julio]

nevermind. I think I see what you''re saying. I found a great tutorial on this. I doesn''t look like it has to be that hard. I think I''m just going to rewrite all of the code.


Never underestimante the power of stupid people in large groups.

[Julio]

ok, I rewrote the code just to get something to show on the screen. this is my code:

bool CVertexArray::Init() { glLockArraysEXT = (PFNGLLOCKARRAYSEXTPROC) wglGetProcAddress("glLockArraysEXT"); glUnlockArraysEXT = (PFNGLUNLOCKARRAYSEXTPROC) wglGetProcAddress("glUnlockArraysEXT"); if(glLockArraysEXT == NULL || glUnlockArraysEXT == NULL) { return false; } return true; }

and the render:

void CVertexArray::Render(float *pIndicies, float *pTexCoords, unsigned int iVertexCount) { glEnableClientState(GL_VERTEX_ARRAY); glEnableClientState(GL_TEXTURE_COORD_ARRAY); glVertexPointer(3, GL_FLOAT, 0, pIndicies); glTexCoordPointer(2, GL_FLOAT, 0, pTexCoords); glLockArraysEXT(0, iVertexCount); // Render glDrawArrays(GL_TRIANGLES, 0, 3); glDisableClientState(GL_TEXTURE_COORD_ARRAY); glUnlockArraysEXT(); }

I plan on getting rid of redundand state changes later, but for now I just want it to work. The problem is that in the initialization both glLockArraysEXT and glUnlockArraysEXT are 0, NULL. WHY? It works fine in other programs I run. At the top of my class .cpp file I declare them:

typedef void (APIENTRY *PFNGLLOCKARRAYSEXTPROC) (int first, int count); typedef void (APIENTRY *PFNGLUNLOCKARRAYSEXTPROC) (void); PFNGLLOCKARRAYSEXTPROC glLockArraysEXT = NULL; PFNGLUNLOCKARRAYSEXTPROC glUnlockArraysEXT = NULL;

thanks,
Joe


Never underestimante the power of stupid people in large groups.

Edited by - Julio on August 1, 2001 1:40:47 PM

Edited by - Julio on August 1, 2001 1:42:02 PM

[Obelix]

You should have a current OpenGL rendering context before calling wglGetProcAddress. Here is all about OpenGL extensions
http://www.opengl.org/developers/code/features/OGLextensions/OGLextensions.html