size: diameter of the particles (spheres)
density: density of the particles
parameters: points to an array of values, allowing to specify additional parameters. Can be nullptr. The first value (an integer) indicates how many parameters will be set. All following values come in pair (an integer indicating what parameter, and a float indicating the parameter value. Following indicates the parameters:
0: Bullet friction coefficient (default: 0.0)
1: Bullet restitution coefficient (default: 0.0)
2: ODE friction coefficient (default: 0.0)
3: ODE soft ERP value (default: 0.2)
4: ODE soft CFM values (default: 0.0)
5: Bullet, ODE, Newton and Vortex linear drag parameter (default: 0.0). Adds a force opposite to the particle velocity (f=v*parameter)
6: Bullet, ODE, Newton and Vortex quadratic drag parameter (default: 0.0). Adds a force opposite to the particle velocity (f=v*v*parameter)
7: Bullet, ODE, Newton and Vortex linear drag parameter in air (z>0) if sim.particle_water was specified (default: 0.0). Adds a force opposite to the particle velocity (f=v*parameter)
8: Bullet, ODE, Newton and Vortex quadratic drag parameter in air (z>0) if sim.particle_water was specified (default: 0.0). Adds a force opposite to the particle velocity (f=v*v*parameter)
9: Vortex friction (default: 0.0)
10: Vortex restitution (default: 0.0)
11: Vortex restitution threshold (default: 0.001)
12: Vortex compliance (default: 0.0)
13: Vortex damping (default: 0.0)
14: Vortex adhesive force (default: 0.0)
15: Newton static friction (default: 0.0)
16: Newton kinetic friction (default: 0.0)
17: Newton restitution (default: 0.0)
If a parameter is not set, then its default value is used. As an example, following array: [3,0,0.5,2,0.5,9,0.5] will set Bullet's, ODE's and Vortex's friction coefficients to 0.5
lifeTime: simulation time after which the particles are destroyed. Set to 0.0 for an unlimited lifetime.
maxItemCount: the maximum number of particles that this object can hold
ambient_diffuse: default ambient/diffuse color (pointer to 3 rgb values). Can be nullptr
setToNULL: not used, set to nullptr
specular: default specular color (pointer to 3 rgb values). Can be nullptr
emission: default emissive color (pointer to 3 rgb values). Can be nullptr
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