If you want to find distance between 2 origins you can do it this way:
PHP Code:
new Float:o[3], Float:v[3]
//now store your origins in o and v
v[0] = v[0]-o[0]
v[1] = v[1]-o[1]
v[2] = v[2]-o[2]
new Float:distance = floatsqroot(v[0]*v[0] + v[1]*v[1] + v[2]*v[2])
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