Simple graphics running very slow

holtaf · 2011-07-07T07:40:11

Hi guys! I have some problems while trying to display some simple graphics( I am using OpenGL and c++ ). I have this simple code : glBegin( GL_QUADS ); glTexCoord2f( 0.0, 0.0 ); glVertex2f( -1.0, -1.0 ); glTexCoord2f( 0.0, 1.0 ); glVertex2f( -1.0, 1.0 ); glTexCoord2f( 1.0, 1.0 ); glVertex2f( 1.0, 1.0 ); glTexCoord2f( 1.0, 0.0 ); glVertex2f( 1.0, -1.0 ); glEnd(); I want to apply texture on whole screen and It runs veeery slow( with 4~10 fps )! Whats the problem ??? Thanks in advice -holtaf

For Beginners

Started by holtaf July 06, 2011 05:13 PM

15 comments, last by holtaf 12 years, 9 months ago

gsamour

141

July 06, 2011 07:20 PM

What happens if you don't draw the player? What is the fps then? Drawing a tiny square doesn't always mean higher fps ;)

EDIT: phrased in a better way -> "drawing a tiny square can mean low fps sometimes"

holtaf

100

Author

July 06, 2011 07:24 PM

When I remove a map drawing part of code :





void Game::render(){



	glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);



	switch ( m_sceneId ) {



		case SCENE_MENU : 

			//menu.render();

			break;

		case SCENE_GAME : 

			//texture.setActiveTexture( m_mapTextureId );

		 	//map.draw();

			texture.setActiveTexture( m_playerTextureId );

			player.draw();

			break;

	}







	glXSwapBuffers( m_pDisplay, m_Window );

}

It runs ok , so the problem is in the map drawing.

gsamour

141

July 06, 2011 07:32 PM

What is your game's target resolution? And what is map.bmp's width and height?

holtaf

100

Author

July 06, 2011 07:38 PM

Window : 640x480
Bitmap : 512x512( RGB )

gsamour

141

July 06, 2011 08:09 PM

Any way you can share your code via download? If not, here's more questions/requests...

Can you post your loadTexture() function?
Are you using shaders at all? (doesn't look like it)