No, we never get rain here in London... (Has to shout over thunder and lightning outside... no, really.)
-Keith :-)

quote:

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Originally posted by Doug:
btw: I know it looks pleasing to have some randomness, but don't raindrops all fall at the same rate?

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quote:

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Raindrops typically hit the ground at velocities of around a meter per second. Since the raindrop usually falls from a cloud at a height of at least one kilometer, it must fall for many minutes before reaching the ground. Thus it has lots of time to reach terminal velocity. The terminal velocity depends on the size of the raindrop, being larger for larger raindrops. This is because the terminal
velocity results from a balance between the force of gravity and the aerodynamic drag force. The gravitational force is proportional to the mass of the drop, and therefore its volume. The aerodynamic drag is proportional to the radius times the velocity. (This is called Stokes' Law.) Fog consists of very small drops, which fall at speeds of less than a meter per minute. A large hailstone can reach a velocity of several tens of meters per second, and thus can cause considerable damage when it hits the ground!

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I stole that from a physics board.

So think further:
If the cloud is 1km high, the upper raindrops got more time to fall and to grow, what makes them bigger and also slower.
That means:
The little raindrops are faster and closer to earth and reach the ground first. Then the big ones. And at last a Boing 747, cause its even bigger and flies higher than this little stupid raindrops.

cu Lutz (just call me Einstein) *ggg*

I made it lieke this:

BMAP test_map,<test.bmp>;

function snowfall()
{
rain_mode = 1;
while(1)
{
rain_pos.x=camera.x;
rain_pos.y=camera.y;
rain_pos.z=camera.z; emit(25,rain_pos,particle_rain);
wait(1);
}
}

function particle_rain()
{
if(MY_AGE == 0)
{
my_pos.z =
camera.Z + 50 + RANDOM(50);
my_pos.x =
camera.X + RANDOM(1000) - 500;
my_pos.Y =
camera.Y + RANDOM(1000) - 500;
MY_SPEED.X = 5-RANDOM(10);
MY_SPEED.Y = 5-RANDOM(10);
MY_SPEED.Z = -10 - RANDOM(5);
my_size = 1000;
my_map = test_map;
my_flare = on;
my_alpha = 90;
end;
}
if (MY_POS.Z < camera.Z - 1000) | | (MY_POS.Z<0)
{
MY_ACTION = NULL;
}
}