For the default of 64, this should be a very rare occurrence so it should not be too much a worry, but there SHOULD be some, configurable functionality. We can do, none, one, or multiple of the proposed solutions.
Nothing
Don't do anything, just live with the number of particles that will be spawned
Pros
Maintainable, simple, consistency in particles
Cons
Less fine-tuned control, potentially for a large number of particles to be spawned.
Merge together triangles
Pros
Every part of the original mesh is utilized
Cons
Can lead to misshapen particles, inconsistently sized particles, or, depending on how the mesh is constructed and vertices ordered, very awkward, disjoint particles
Skip a certain number of triangles
Calculation for how many to skip on an interval could be (num_triangles / target_num_particles).ceiling() (or maybe .floor()?)
For example, if our target is 32 and we have 64, we only use every other triangle. If we have 96 and our target is 32, we only use every 3rd triangle. For an uneven example, 48 triangles with target 32, would become 24 triangles skipping every other. Or, to avoid going below target, we could even do .floor() instead, so in the previous example we would retain the 48.
Pros
Consistency in particles, simple, efficient
Cons
Could create awkward spacing between particles depending on the even and the way the mesh was built.
For the default of 64, this should be a very rare occurrence so it should not be too much a worry, but there SHOULD be some, configurable functionality. We can do, none, one, or multiple of the proposed solutions.
Nothing
Don't do anything, just live with the number of particles that will be spawned
Pros
Maintainable, simple, consistency in particles
Cons
Less fine-tuned control, potentially for a large number of particles to be spawned.
Merge together triangles
Pros
Every part of the original mesh is utilized
Cons
Can lead to misshapen particles, inconsistently sized particles, or, depending on how the mesh is constructed and vertices ordered, very awkward, disjoint particles
Skip a certain number of triangles
Calculation for how many to skip on an interval could be
(num_triangles / target_num_particles).ceiling()(or maybe .floor()?) For example, if our target is 32 and we have 64, we only use every other triangle. If we have 96 and our target is 32, we only use every 3rd triangle. For an uneven example, 48 triangles with target 32, would become 24 triangles skipping every other. Or, to avoid going below target, we could even do .floor() instead, so in the previous example we would retain the 48.Pros
Consistency in particles, simple, efficient
Cons
Could create awkward spacing between particles depending on the even and the way the mesh was built.