一个 Cinema 4D 插件，使用分布式行为模型为 C4D 标准粒子系统实现植绒/蜂群模拟_C++_代码_下载

# FlockModifier The Flock Modifier is a modifier object for the good old standard particle system in Cinema 4D. It allows to easily apply the behavior of flocks, swarms or schools to the particles. The modifier uses a distributed behavioral model, as described by Craig Reynolds in his 1987 SIGGRAPH paper "Flocks, Herds, and Schools: A Distributed Behavioral Model". Several of the classic "Reynolds Rules" are implemented. Each particle will... * ...keep a minimum distance to its neighbors * ...try to stay in the center of the flock * ...chase a target * ...match the velocity and travel direction of its flockmates * ...obey a certain minimum / maximum speed limit * ...avoid collision with geometry * ...fly level / avoid steep rising or falling * ...apply a certain randomness to its movement This plugin demonstrates the following C4D API aspects: * Particle modifier plugins, derived from `class ObjectData` * Working with the C4D standard particle system (which is not as lame as it sounds) using `ObjectData::ModifyParticle()` * Ray intersections with `class GeRayCollider` * Simple viewport drawing * Aligning matrices to trajectories and directions