Join Andy Needham for an in-depth discussion in this video Using Gravity and Falloff to make particles fall, part of X-Particles 3 for Cinema 4D Essential Training.
- Now we're going to take a look at some of the Modifiers and X-Particles and first up: it's Gravity. Gravity is a pretty simple modifier. We use it to make our Particles fall down as if effected by gravitational force. Let's add one to the emitter. So you find it in the Motion modifiers. Here it is. We'll just press play and you can immediately see the effect that Gravity is having. If I turn it off, you can see the effect without it.
The Gravity strength: this figure refers to a real-world value, supposedly. You can have some variations of that, if you'd like. Of course, this is X-Particles, after all. And, you can change the strength using the sliders, as well, to suit your needs. Like most modifiers, it can be action controlled and there's one more thing I want to show you with this. This field here: "Effect Towards." Let's just pause and get ourselves set up. We add a Null and I'm just going to move it over in this direction.
We'll just make it a bit clearer to see. There's our Null. Back in the Gravity modifier, if I click on the Null and drag it into the Effect Towards field, you can see that the Gravity Modifier is pointed toward the Null. So, if we rewind and play, we can now drag the Null around. We can start getting creative with the way the Gravity is effecting the particles.
Let's just remove that for now. We'll talk about the Falloff for the Gravity. I'm going to reset these values, too, just so it's pointing down again. So we have the default behavior. Falloffs are a way of restricting effect to or triggering it to a specified area. Looking at the infinite shape, which is the default behavior, it's going to have an effect over the whole space of the document. If we drop down the list, all these other shapes will be very familiar to you if you've used the Mograph effectors.
The one I want to look at the moment is the Life and this refers to the document length and the particle life. So, if we rewind, what we can do is use the points here to drag down the spline. What I want to say is I don't want Gravity to effect at this point and then I want it to gradually increase its strength out towards the end of the life. If I press play now, we can see that nothing's happening and then it's just starting to take effect.
If we increase the document, it's going to take longer to take effect because this is all relative to those settings. So Gravity is a pretty easy modifier to understand. If we want want our Particles to fall down, then we add Gravity. You can also get creative, too, by changing the values, adding variation, and having an object in the scene effect the direction of the Gravity. Now we have the Falloff concept understood, let's explore some more modifiers.
- Working with the Emitter tabs
- Adjusting particles with modifiers
- Creating visible particles
- Using sprites
- Colliding, freezing, and lighting particles
- Caching in X-Particles
- Applying constraints
- Adjusting materials settings
- Sculpting particles
- Saving and loading presets