Softbody physics without using the built-in physics engine. It works on any mesh and is fairly robust (length and volume constraints). Here it is working on some random meshes from the toolbox:
The softbodies are simulated using particles and constraints (which preserve lengths and volumes with some lenience). A previous softbody simulation I made only preserved lengths which made it less robust (no volume constraints meant it could collapse into a flat object and wouldn’t be able to recover). It also didn’t support arbitrary meshes.
I’m not smart enough to understand all of this, but I’m guessing we would need to simulate a plane for each face? Or would that not work or is just inefficient.
I’m not sure what the optimal solution here would be, but testing the surface would be a lot more accurate than testing the vertices. I don’t think it would be too inefficient, since here the bottleneck for performance is drawing the object, the actual physics has a negligible performance impact.
I really liked this post, so I’m trying to help slowly solve the collision issue. Currently, I only have code to find the bounding box of your vertices Lol.
local function verticesBoundingBox(vertices)
local minX, minY, minZ = math.huge, math.huge, math.huge
local maxX, maxY, maxZ = -math.huge, -math.huge, -math.huge
for _, vertex in ipairs(vertices) do
local x, y, z = vertex.X, vertex.Y, vertex.Z
if x < minX then minX = x end
if y < minY then minY = y end
if z < minZ then minZ = z end
if x > maxX then maxX = x end
if y > maxY then maxY = y end
if z > maxZ then maxZ = z end
end
return Vector3.new(minX, minY, minZ), Vector3.new(maxX, maxY, maxZ)
end
My idea was to see if the bounding box interacts with a part, run some code that I haven’t thought of yet. Will be doing this later.
