Completion

Completion & Discussion Checklist

Before joining the group discussion or concluding this tutorial, ensure you have completed the tasks, investigated the bugs, and are ready to discuss the questions below:

Click to expand Completion & Discussion Checklist (8 Items)

#	Type	Item	Prompt Preview
1	Bug Hunt	Vanishing Water Swap Bug	Run the simulation and drop sand on water. The sand falls through, but the water vanishes! Why did we lose the water particle, and how can we use temp to exchange their positions?
2	Question	Random Probabilities	Try making water have a small chance to move upwards. What parameters for getRandomInt() would you use for a very low probability?
3	Question	Elemental Simulation Rules	Think about other substances and elements. How can you define interaction rules for Acid, Ice, Lava, or Steam within object-oriented subclasses?
4	Task	Water Movement Variations	Mess around with water physics! Change movement probabilities, add extra options, make floating water, or add teleportation. Add 3 new behaviors to water’s update function.
5	Task	Create Stone Class	Create a new class called Stone that extends Particle. In its constructor, set color to "gray" and type to "stone". Add Stone as an option in checkParticleType.
6	Task	Create Dirt Class	Create a new class called Dirt that extends Sand. In its constructor, set color to "brown" and type to "dirt". Add Dirt as an option in checkParticleType.
7	Task	Create Grass Class	Create a new class called Grass extending Sand (color: "green", type: "grass"). Do not add it to checkParticleType — grass can only be created when water touches dirt.
8	Challenge	3 Custom Particles	Add at least 3 new particles and make sure to add interactions with other particles (don’t just add Metal and make it act like Stone). Get creative with it!

Congratulations!

You’ve now taken your Falling Sand simulation to the next level! In this second part of the tutorial, you’ve successfully:

• Introduced a new particle type, Water, and implemented its unique physics, including random movement and interactions with other particles.
• Utilized the getRandomInt() function to add probabilistic behavior to your particles, making the simulation more dynamic and realistic.
• Implemented the swap() function to create interactions between different particle types, allowing Sand to fall through Water.
• Added Stone and Dirt particles, demonstrating how to extend existing classes and create new particle behaviors.
• Created a dynamic interaction between Water and Dirt, resulting in the creation of Grass, showcasing the power of particle interactions.
• Further expanded your understanding of JavaScript classes, inheritance, and object-oriented programming.
• Practiced your problem-solving and debugging skills by experimenting with particle behaviors.

You’ve built a solid foundation for creating even more complex and interesting particle simulations. Now, let’s explore how you can further expand your project with new particles and interactions!