Calculation Type

– Every vertex is surrounded with an elastic virtual sphere.
– Vertices may not penetrate the sphere of other vertices.
– Calculation Type let you adjust the size of these spheres.
– Calculation Type can be Manual, Average, Minimal, Maximal, AvMinMax
– What’s the best Calculation Type? It depends from the mesh an I’m sure a better comprehension of how Calculation Type works will help you to obtain better simulations!

– In this example I used a very simple mesh only to show how this parameter affects the radius of the spheres:

Blender Soft Body Sef Collision Mesh Sizes

– I found more useful to render videos showing the mesh winth and without the spheres instead of comparative videos, so here there are some calculations:

Manual

– When you chooose ‘Manual’ the radius of all spheres is equal to the ‘Ball Size’, in this example 0.4 BU:

Blender Soft Body Sef Collision Manual Spheres

– Here the videos, that one on the right showing the spheres:



Average

-The average length of all edges attached to the vertex is calculated and then multiplied with the Ball Size setting (0.4 BU in these examples).
– Works well with evenly distributed vertices.

– In this table the radius of each sphere when you chooose ‘Average’:

Blender Soft Body Sef Collision Average

– And these are the spheres around the vertexes:

Blender Soft Body Sef Collision Average Spheres

– Here the videos:



Minimal

– The ball size is as large as the smallest spring length of the vertex multiplied with the Ball Size (0.4 BU in these examples).


– In this table the radius of each sphere when you chooose ‘Minimal’:

Blender Soft Body Sef Collision Minimal

– And these are the spheres around the vertexes:

Blender Soft Body Sef Collision Minimal Spheres

– Here the videos:



Maximal

– In this table the radius of each sphere when you chooose ‘AvMinMax’:

Blender Soft Body Sef Collision Maximal

– And these are the spheres around the vertexes:

Blender Soft Body Sef Collision Maximal

– Here the videos:



AvMinMax

– In this table the radius of each sphere when you chooose ‘AvMinMax’:

Blender Soft Body Sef Collision AvMinMax

– And these are the spheres around the vertexes:

Blender Soft Body Sef Collision AvMinMax

– Here the videos:

Blender Soft Body Self Collision Calculation Type