Performance problem
Author
ok i am new to this opengl things and i have some trouble with the render part
the function underneath is thought to render 50000 small triangles
but i get only 1 frame though vsync is disables
are there any other things i should cares about
?
i run it in windowed mode though
static GLfloat vertices[]=
{
0,2,0,
-1,0,0,
1,0,1,
1,1,1,
2,0,0,
-1,-1,-1
};
static GLfloat color[]=
{
0,0,255,
0,0,255,
0,0,255,
255,0,0,
255,0,0,
255,0,0
};
static GLubyte indices[]=
{
0,1,2,3,4,5
};
CRender::CRender()
{
}
void CRender::SetPosition()
{
gluLookAt(0, 0, 80, 0, 0, 0, 1,10 , 1);
}
void CRender::Draw()
{
SetPosition();
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(3,GL_FLOAT,0,color);
glVertexPointer(3,GL_FLOAT,0,vertices);
//glDrawArrays(GL_TRIANGLES,0,6);
glColor3f(255,0,0);
for(int i=1;i<25000;i++)
{
glDrawElements(GL_TRIANGLES,6,GL_UNSIGNED_BYTE,indices);
}
}
All your triangles are at the same position. The fillrate is probably not high enough.
If you''ve got a GeForce use the GL_VERTEX_ARRAY_RANGE extension instead of standard vertex arrays.
If you''ve got a GeForce use the GL_VERTEX_ARRAY_RANGE extension instead of standard vertex arrays.
why are you making a loop around you glDrawElement() function ?
it could be done just by one call
glDrawElements(GL_TRIANGLES,6,GL_UNSIGNED_BYTE,indices);
seems correct for all your rendering. so no loop.
or maybe i misunderstood your problem. so sorry
it could be done just by one call
glDrawElements(GL_TRIANGLES,6,GL_UNSIGNED_BYTE,indices);
seems correct for all your rendering. so no loop.
or maybe i misunderstood your problem. so sorry
Use CVA''s if you are calling glDrawElements on the same vertex data many many times. That should improve framerate a bit.
Author
GL_VERTEX_ARRAY_RANGE
where can i find this and how can i use it
and this CVA`s what is it and how to use it
you see i am damn knew to ogl
WGL_EXT_swap_control where can i find this extension and do i enable it like this glEnable(WGL_EXT_swap_control );??
[edited by - Basiror on March 21, 2002 12:57:01 PM]
where can i find this and how can i use it
and this CVA`s what is it and how to use it
you see i am damn knew to ogl
WGL_EXT_swap_control where can i find this extension and do i enable it like this glEnable(WGL_EXT_swap_control );??
[edited by - Basiror on March 21, 2002 12:57:01 PM]
Author
OK i did it your way thats really an performance increase
i manage 128000 polygons at 44 frames i think thats really good but i know you can get higher framerates so are you willing to help me further more?
the ways mention above sound interesting though i have no idea where to start
do i need an additional header from nVidia?
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <gl\gl.h> // Header File For The OpenGL32 Library
#include <gl\glu.h>
#include "renderer.h"
static GLfloat vertices[]=
{
0,2,0,
-1,0,0,
1,0,1,
};
static GLfloat color[]=
{
0,0,255,
0,0,255,
0,0,255,
};
static GLubyte indices[128000];
GLuint list;
CRender::CRender()
{
}
void CRender::SetPosition()
{
}
void CRender::Draw()
{
//SetPosition();
gluLookAt(0, 0, 100, 0, 0, 0, 1,10 , 1);
glCallList(list);
glFlush();
}
void CRender::Init()
{
int a=0;
for(int i=0;i<128000;i++)
{
indices=a;
a++;
if(a>2)
a=0;
}
list=glGenLists(1);
glNewList(list,GL_COMPILE);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(3,GL_FLOAT,0,color);
glVertexPointer(3,GL_FLOAT,0,vertices);
glDrawElements(GL_TRIANGLES,128000,GL_UNSIGNED_BYTE,indices);
glEndList();
}
void CRender::LoadScene()
{
}
void CRender::LoadTextures()
{
}
i manage 128000 polygons at 44 frames i think thats really good but i know you can get higher framerates so are you willing to help me further more?
the ways mention above sound interesting though i have no idea where to start
do i need an additional header from nVidia?
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <gl\gl.h> // Header File For The OpenGL32 Library
#include <gl\glu.h>
#include "renderer.h"
static GLfloat vertices[]=
{
0,2,0,
-1,0,0,
1,0,1,
};
static GLfloat color[]=
{
0,0,255,
0,0,255,
0,0,255,
};
static GLubyte indices[128000];
GLuint list;
CRender::CRender()
{
}
void CRender::SetPosition()
{
}
void CRender::Draw()
{
//SetPosition();
gluLookAt(0, 0, 100, 0, 0, 0, 1,10 , 1);
glCallList(list);
glFlush();
}
void CRender::Init()
{
int a=0;
for(int i=0;i<128000;i++)
{
indices=a;
a++;
if(a>2)
a=0;
}
list=glGenLists(1);
glNewList(list,GL_COMPILE);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(3,GL_FLOAT,0,color);
glVertexPointer(3,GL_FLOAT,0,vertices);
glDrawElements(GL_TRIANGLES,128000,GL_UNSIGNED_BYTE,indices);
glEndList();
}
void CRender::LoadScene()
{
}
void CRender::LoadTextures()
{
}
look at developer.nvidia.com, download their SDK. The full one is 140 meg, though, so you may want to pick out just the GL parts of it.
You need glext.h and wglext.h to use NV_vertex_array_range. Instructions on how to use it etc. are in the SDK documentation. If you haven''t used extensions before, look at NeHe''s tutorial 22. The functions aren''t exported by the DLL, so you need to use fn. pointers etc to use most extensions.
You need glext.h and wglext.h to use NV_vertex_array_range. Instructions on how to use it etc. are in the SDK documentation. If you haven''t used extensions before, look at NeHe''s tutorial 22. The functions aren''t exported by the DLL, so you need to use fn. pointers etc to use most extensions.
Author
char* text=(char*)malloc(strlen((char *)glGetString(GL_EXTENSIONS))+1); // Allocate Memory For Our Extension String
strcpy (text,(char *)glGetString(GL_EXTENSIONS));
token=strtok(text," "); // Parse ''text'' For Words, Seperated By " " (spaces)
while(token!=NULL) // While The Token Isn''t NULL
{
cnt++; // Increase The Counter
if (cnt>maxtokens) // Is ''maxtokens'' Less Than ''cnt''
{
maxtokens=cnt; // If So, Set ''maxtokens'' Equal To ''cnt''
}
this???????????????
strcpy (text,(char *)glGetString(GL_EXTENSIONS));
token=strtok(text," "); // Parse ''text'' For Words, Seperated By " " (spaces)
while(token!=NULL) // While The Token Isn''t NULL
{
cnt++; // Increase The Counter
if (cnt>maxtokens) // Is ''maxtokens'' Less Than ''cnt''
{
maxtokens=cnt; // If So, Set ''maxtokens'' Equal To ''cnt''
}
this???????????????
Author
or that here
glMultiTexCoord1fARB = (PFNGLMULTITEXCOORD1FARBPROC) wglGetProcAddress("glMultiTexCoord1fARB");
glMultiTexCoord1fARB = (PFNGLMULTITEXCOORD1FARBPROC) wglGetProcAddress("glMultiTexCoord1fARB");
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