Bug? : tMesh calling glBindBufferARB with no vbo

BlitzMax Forums/MiniB3D Module/Bug? : tMesh calling glBindBufferARB with no vbo

Difference

(Posted 2009) [#1]

As far as I can tell, in tMesh, there's a place where glBindBufferARB() is called, even when vbo is not defined.

This means a minib3d will crash here, even with USE_VBO = false, if the GFX card does not support it?

			If vbo
			
				If anim_render
					glBindBufferARB(GL_ARRAY_BUFFER_ARB,anim_surf.vbo_id[0])
					glVertexPointer(3,GL_FLOAT,0,Null)
				Else
					glBindBufferARB(GL_ARRAY_BUFFER_ARB,surf.vbo_id[0])
					glVertexPointer(3,GL_FLOAT,0,Null)
				EndIf
							
				glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,surf.vbo_id[5])
					
				glBindBufferARB(GL_ARRAY_BUFFER_ARB,surf.vbo_id[3])
				glNormalPointer(GL_FLOAT,0,Null)
				
				glBindBufferARB(GL_ARRAY_BUFFER_ARB,surf.vbo_id[4])
				glColorPointer(4,GL_FLOAT,0,Null)
				
			Else
		
' PROBLEM HERE : calling the ARB extention outside vbo check				glBindBufferARB(GL_ARRAY_BUFFER_ARB,0) ' reset - necessary for when non-vbo surf follows vbo surf
				glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,0)
			
				If anim_render
					glVertexPointer(3,GL_FLOAT,0,anim_surf.vert_coords#)
				Else
					glVertexPointer(3,GL_FLOAT,0,surf.vert_coords#)
				EndIf
				
				glColorPointer(4,GL_FLOAT,0,surf.vert_col#)
				glNormalPointer(GL_FLOAT,0,surf.vert_norm#)
			
			EndIf

slenkar

(Posted 2009) [#2]

this could be the reason it crashes on my old computer?

Difference

(Posted 2009) [#3]

It migth be, but it would be great for all if you could take the time and debug it.

Use debugstop, and then "step into" the code until you find the exact place where it crashes.