Particle FX for DAZ|Studio
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Mass, Gravity and Plane Direction |
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The Set Mass Operator sets the particle masses.
A particle must have a mass in order to be affected by force based Operators such as the Gravity Operator.
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The Set Type has options of Set and Add. The Mass parameter sets the amount the particles mass will be set or changed. The units of mass are grams. The Mass Range sets the amount that the Mass can be randomized. |
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Although the particle's mass is primarily for use with forces such as Gravity, it can also be used with the Color Gradient. By setting the Mass Range to some small value and then mapping the Color Gradient to the particle mass with its Min and Max parameters synched to the Mass Range, the texture mapping of the particles can be randomized without using the particles Age.
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The Gravity Strength parameter gives the strength of the force applied to the particles. The units are in g's (gee's). One g is the strength of gravity at the Earth's surface. The value can be made negative to make particles float upward. The Force Range parameter is for randomization of the Gravity Strength.
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| A force, like a velocity, is composed of
a strength and a direction. The Gravity Operator will
therefore usually have a Direction child.
The Plane Direction is most used with Gravity as it makes all the affected particles fall in the same direction, as objects near the surface of the Earth will do.
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| The Plane Direction can be rotated using its
Rotation
Transforms dials. This will give the final direction.
The Plane Direction is visible in the scene as an arrow object. This can be toggled off using the Visible dial.
The Plane Direction can be parented to another node in the scene. Typically it is set to "None" and the Rotation dials left at the zero default so that gravity points down.
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The Plane Direction does not use a Randomizer. To get the effect of a Plane Direction with a Randomizer, the Nozzle Direction can be used with the its Width parameter set close to zero. Particles can be made to appear to rise, as with fire and smoke, by using negative values of the Gravity Strength. A wind like affect can also be achieved by rotating the Plane Direction so that it is parallel to the floor.
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