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|
local test = require('minunit').test
local geom = require 'geometry'
local util = require 'util'
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
-- geom.point tests
--
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test(
'create point object',
function()
local pt = geom.point(1, 5.5)
assert(pt.x == 1)
assert(pt.y == 5.5)
local mt = getmetatable(pt)
assert(mt.__index == geom.point)
end
)
test(
'point distances',
function()
local a = geom.point(1, 3)
local b = geom.point(4, 7)
assert(a:distance_to(b) == 5)
assert(a:distance_to(a) == 0)
end
)
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
-- geom.square tests
--
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test(
'create square object',
function()
local s = geom.square(geom.point(2, 5), 1)
assert(s.center.x == 2)
assert(s.center.y == 5)
assert(s.span == 1)
assert(s.x.min == 1.5)
assert(s.x.max == 2.5)
assert(s.y.min == 4.5)
assert(s.y.max == 5.5)
end
)
test(
'check if point is in square',
function()
local center = geom.point(1, 1)
local square = geom.square(center, 2)
local interior_points = {
geom.point(1, 1),
geom.point(2, 2),
geom.point(2, 0.1),
geom.point(0.1, 0.1),
}
for _, point in ipairs(interior_points) do
assert(
square:contains(point),
string.format(
'point (%0.2f, %0.2f) was incorrectly outside!',
point.x, point.y
)
)
end
local exterior_points = {
geom.point(0, 0),
geom.point(10, 10),
geom.point(0, 1),
geom.point(1, 0),
geom.point(-2, 1),
geom.point(1, -2),
}
for _, point in ipairs(exterior_points) do
assert(
not square:contains(point),
string.format(
'point (%0.2f, %0.2f) was incorrectly inside!',
point.x, point.y
)
)
end
end
)
test(
'subdivide a square',
function()
local center = geom.point(2, 2)
local square = geom.square(center, 4)
local children = square:divide()
assert(
#children == 4,
string.format(
'incorrect number of children: %d',
#children
)
)
local aa = children[1]
assert(aa.center.x == 1)
assert(aa.center.y == 1)
assert(aa.span == 2)
local ba = children[2]
assert(ba.center.x == 3)
assert(ba.center.y == 1)
assert(ba.span == 2)
local ab = children[3]
assert(ab.center.x == 1)
assert(ab.center.y == 3)
assert(ab.span == 2)
local bb = children[4]
assert(bb.center.x == 3)
assert(bb.center.y == 3)
assert(bb.span == 2)
end
)
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
-- geom.qt_node
--
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test(
'create qt_node',
function()
local center = geom.point(2, 2)
local node = geom.qt_node(center, 4)
assert(node.square.center.x == 2)
assert(node.square.center.y == 2)
assert(node.square.span == 4)
assert(node:is_leaf())
assert(not node.point)
end
)
test(
'insert points into qt_node',
function()
local center = geom.point(2, 2)
local node = geom.qt_node(center, 4)
assert(node:is_leaf())
assert(not node.point)
node:insert(geom.point(1, 1))
assert(node:is_leaf())
assert(node.point.x == 1)
assert(node.point.y == 1)
node:insert(geom.point(3, 3))
assert(not node:is_leaf())
assert(node.children[1]:is_leaf())
assert(node.children[1].point.x == 1)
assert(node.children[1].point.y == 1)
assert(node.children[2]:is_leaf())
assert(not node.children[2].point)
assert(node.children[3]:is_leaf())
assert(not node.children[3].point)
assert(node.children[4]:is_leaf())
assert(node.children[4].point.x == 3)
assert(node.children[4].point.y == 3)
end
)
test(
'instert four points into qt_node',
function()
local center = geom.point(2, 2)
local node = geom.qt_node(center, 4)
node:insert(geom.point(1, 1))
node:insert(geom.point(0.5, 0.5))
node:insert(geom.point(0.25, 0.25))
node:insert(geom.point(0.125, 0.125))
assert(not node:is_leaf())
assert(node.children[2]:is_leaf())
assert(not node.children[2].point)
assert(node.children[3]:is_leaf())
assert(not node.children[3].point)
assert(node.children[4]:is_leaf())
assert(not node.children[4].point)
node = node.children[1].children[1]
assert(not node:is_leaf())
assert(not node.children[1]:is_leaf())
assert(node.children[2]:is_leaf())
assert(not node.children[2].point)
assert(node.children[3]:is_leaf())
assert(not node.children[3].point)
assert(node.children[4]:is_leaf())
assert(node.children[4].point.x == 1)
assert(node.children[4].point.y == 1)
node = node.children[1]
assert(not node:is_leaf())
assert(node.children[2]:is_leaf())
assert(not node.children[2].point)
assert(node.children[3]:is_leaf())
assert(not node.children[3].point)
assert(node.children[4]:is_leaf())
assert(node.children[4].point.x == 0.5)
assert(node.children[4].point.y == 0.5)
node = node.children[1]
assert(not node:is_leaf())
assert(node.children[2]:is_leaf())
assert(not node.children[2].point)
assert(node.children[3]:is_leaf())
assert(not node.children[3].point)
assert(node.children[4]:is_leaf())
assert(node.children[4].point.x == 0.25)
assert(node.children[4].point.y == 0.25)
assert(node.children[1]:is_leaf())
assert(node.children[1].point.x == 0.125)
assert(node.children[1].point.y == 0.125)
end
)
|
