Problem with GL_POINT_DISTANCE_ATTENUATION

OpenGL OpenGL: Advanced Coding
1

I have the following code:

		float quadratic[] =  { 1.0f, 0.01f, 0.0f };
		glPointParameterfv( GL_POINT_DISTANCE_ATTENUATION, quadratic );
		glPointParameterf( GL_POINT_FADE_THRESHOLD_SIZE, 60.0f );
		glPointParameterf( GL_POINT_SIZE_MIN, 1.0f );
		glPointParameterf( GL_POINT_SIZE_MAX, 15.0f );
		
		
		glEnable(GL_POINT_SPRITE_OES); 
		glTexEnvi(GL_POINT_SPRITE_OES, GL_COORD_REPLACE_OES, GL_TRUE);
		glPointSize( 15.0f );

Whatever I go near or far the point doesn’t seems to change the way I want… In any case it never reach 15.0f… What Im doing wrong here? I am missing something?

Tks in advance!

2

I manage to found the following obscure code:

				float att[] =  { 0.0f, 0.0f, 0.0f };

				
				float H = 320;
				double h = 2.0 / camera->mat_projection[5];
				double D0 = sqrt(2.0)*H/h;
				double k = 1.0/(1.0 + 2.0 * (1/camera->mat_projection[5])*(1/camera->mat_projection[5]));
				att[1] = (float)(1.0/(D0*D0)*k);
				
				glPointParameterfv( GL_POINT_DISTANCE_ATTENUATION, att );

But still the point sprite seems to grow when moving backward and shrink when moving forward… I tried to inverse the value but the result is even worst…

Any clue? someone? anyone?

ps: My Up vector is Z so the forward vector should be Y so att[1] right?