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function someComponent.getMeshBoundingBox ( )
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-- Get a handle for this object, its mesh and the mesh subset counts
local hComponent = this.getObject ( )
local hMesh = shape.getMesh ( hComponent )
local nSubsetCount = mesh.getSubsetCount ( hMesh )
-- Allocate and initialize the bounding box variables
local minx, miny, minz = 0.0, 0.0, 0.0
local maxx, maxy, maxz = 0.0, 0.0, 0.0
-- Switch to tell if it's the first iteration
local firstValues = true
-- Go through the subsets one at a time
for nSubCounter = 0, nSubsetCount, 1
do
-- See if the first loop is already the last
if (nSubCounter == nSubsetCount)
then
break
end
-- Lock this vertex buffer for reading
mesh.lockSubsetVertexBuffer ( hMesh, nSubCounter, mesh.kLockReadWrite )
-- Go through all the vertices of this subset
local nNumVerts = mesh.getSubsetVertexCount ( hMesh, nSubCounter )
for nVertCount = 0, nNumVerts, 1
do
-- See if the first loop is already the last
if (nVertCount == nNumVerts)
then
break
end
-- Grab the position of the vertex
local x, y, z = mesh.getSubsetVertexPosition ( hMesh, nSubCounter, nVertCount )
-- If it's our first iteration, store everything
if (firstValues)
then
firstValues = false
minx, maxx = x, x
miny, maxy = y, y
minz, maxz = z, z
else
-- Calculate the min and max coordinates
minx = math.min ( minx, x )
miny = math.min ( miny, y )
minz = math.min ( minz, z )
maxx = math.max ( maxx, x )
maxy = math.max ( maxy, y )
maxz = math.max ( maxz, z )
end
end
-- Make sure to unlock the vertices after we've done reading it
mesh.unlockSubsetVertexBuffer ( hMesh, nSubCounter )
end
-- Give back the bounding box
return minx, miny, minz, maxx, maxy, maxz
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end
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