Make dot density homogeneous

[Remi-Gau]

The dot density is not the same in all points of the aperture and this varies based on the motion direction.

Find a way to simulate this:

• ensure that the asked dot density is the one required

[Remi-Gau]

results of simulation with:

        cfg.dot.coherence = 1; % proportion
        
        cfg.dot.lifeTime = 10; % in seconds
        
        cfg.dot.matrixWidth = 250; % in pixels
        
        cfg.dot.proportionKilledPerFrame = 0;
        
        cfg.timing.eventDuration = 500; % in seconds