I have recently tried the use of
VBO. I just copy pasted the code from this
http://antongerdelan.net/opengl/hellotriangle.html
It compiles fine and seems running well. However, I noticed on the
taskmanager that the program runs at 50% CPU usage. Its just a simple triangle, nothing else. I was expecting it to be of 0% because all of other programs I created in
glfw3 runs on 0% when idle.
I know that V-SYNC in
glfw3 is set true by default, but still I add this line of code to ensure
glfwSetInterval(GL_TRUE); //sets V-SYNC on
but still nothings changed.
After messing with the
test_vs.glsl (I think this has nothing to do with the problem):
code I changed:
from
1 2 3 4 5 6
|
in vec3 vp;
void main ()
{
gl_Position = vec4 (vp, 1.0);
}
|
to
1 2 3 4 5 6
|
in vec2 vp;
void main ()
{
gl_Position = vec4 (vp, 0, 1.0);
}
|
And changed attributes of vertex in
.cpp code to 2D.
Running several times the `Hello Triangle` program again, computer stops and hang a bit ---> Then
**CRAASSH**. The graphics card is broken! (literally ouch). The computer shutdowns itself, and I try rebooting it again, I got a screen with full of random lines displaying and fail to continue on desktop.
I don't have much of the information about the graphics card but
glew says
GeForce 7300 GT/PCI/SSE2/3DNOW! |
and running on
Windows XP with
OpenGL v2.1 support according to
glew.
Some of the extensions I added:
1 2 3 4
|
-glfwWindowHint(GLFW_SAMPLES, 4);
-glfwWindowHint(GLFW_OPENGL_CORE_PROFILE, 2);
-glewExperimental = GL_TRUE;
-//And I add the prefix ARB to any function related to vbo
|
I suspect this is due to lack of
OpenGL extensions support check. But, is that so really the problem? Is it the simple program or other? If so, why would they let this to happen?