Graphics Programs Reference
In-Depth Information
Figure 17.10
10 cm
18 cm
Figure 17.11
its values is identical to that
of Scenario 1, with the excep-
tion that the “End” time value
has been changed to 8.00 and the “Real World Size” has been set
at 0.280 meters in the “Domain World” tab (Figure 17.11).
When setting up this fluid simulation, the length of the final
animation in real time and the physical size of the scene in real
terms must be considered. The Blender scene viewed on the com-
puter screen is seen in Blender units and an animation is mea-
sured in the number of frames viewed at a set frame rate. In this
simulation, the animation will be 200 frames long viewed at 24
frames per second, as seen in the properties window - “Render”
button - “Dimensions” tab (Figure 17.12). Two hundred frames
at 24 frames per second produces an animation of approximately
8 seconds duration. Setting “Start” at 0.00 and “End” at 8.00 in
the “Fluid” tab computes the action of the fluid over a 8-second
time period, i.e., over the length of the animation—this produces
a real-time animation. If, for example, the “End” value was set at
4.00 seconds, then how the fluid behaved in 4.00 seconds would
be spread over the 8.00 seconds of animation (in other words, it
would be slowed down).
In regards to the size of the scene, consider that the diameter
of the cup is something like 10 centimeters and the horizontal
length of the trough extending past the edge of the cup is 18 cm.
We then require a domain length of 28 cm. Thus, the “Real World
Size” value is set at 0.280 (0.280 m = 28 cm), which is the longest
side of the domain (Figure 17.10).
