5f7a7f29fa
* Fixed an issue with is_quat, is_vec3, is_vec2, and is_mat4 methods * Fixed a minor issue with local variables being declared too late
174 lines
3.3 KiB
Lua
174 lines
3.3 KiB
Lua
local vec2 = require "modules.vec2"
|
|
local DBL_EPSILON = require("modules.constants").DBL_EPSILON
|
|
local abs, sqrt = math.abs, math.sqrt
|
|
|
|
describe("vec2:", function()
|
|
it("tests creating vectors", function()
|
|
-- new empty vector
|
|
local a = vec2()
|
|
assert.is.equal(a.x, 0)
|
|
assert.is.equal(a.y, 0)
|
|
assert.is_true(a:is_vec2())
|
|
assert.is_true(a:is_zero())
|
|
|
|
-- new vector from table
|
|
local b = vec2 { 0, 0 }
|
|
assert.is.equal(b.x, 0)
|
|
assert.is.equal(b.y, 0)
|
|
|
|
local c = vec2 { x=0, y=0 }
|
|
assert.is.equal(c.x, 0)
|
|
assert.is.equal(c.y, 0)
|
|
|
|
-- new vector from numbers
|
|
local d = vec2(3.14159, -2.808)
|
|
assert.is.equal(d.x, 3.14159)
|
|
assert.is.equal(d.y, -2.808)
|
|
|
|
-- new vector from other vector
|
|
local e = d:clone()
|
|
assert.is.equal(d, e)
|
|
end)
|
|
|
|
it("tests basic operators", function()
|
|
local a = vec2(3, 5)
|
|
local b = vec2(7, 4)
|
|
local s = 2
|
|
|
|
-- Add
|
|
do
|
|
local c = vec2():add(a, b)
|
|
local d = a + b
|
|
|
|
assert.is.equal(c.x, 10)
|
|
assert.is.equal(c.y, 9)
|
|
assert.is.equal(c, d)
|
|
end
|
|
|
|
-- Subtract
|
|
do
|
|
local c = vec2():sub(a, b)
|
|
local d = a - b
|
|
|
|
assert.is.equal(c.x, -4)
|
|
assert.is.equal(c.y, 1)
|
|
assert.is.equal(c, d)
|
|
end
|
|
|
|
-- Multiply
|
|
do
|
|
local c = vec2():mul(a, s)
|
|
local d = a * s
|
|
|
|
assert.is.equal(c.x, 6)
|
|
assert.is.equal(c.y, 10)
|
|
assert.is.equal(c, d)
|
|
end
|
|
|
|
-- Divide
|
|
do
|
|
local c = vec2():div(a, s)
|
|
local d = a / s
|
|
|
|
assert.is.equal(c.x, 1.5)
|
|
assert.is.equal(c.y, 2.5)
|
|
assert.is.equal(c, d)
|
|
end
|
|
|
|
-- Sign flip
|
|
do
|
|
local c = -a
|
|
assert.is.equal(c.x, -3)
|
|
assert.is.equal(c.y, -5)
|
|
end
|
|
end)
|
|
|
|
it("tests normal, trim, length", function()
|
|
local a = vec2(3, 5)
|
|
local b = vec2():normalize(a)
|
|
local c = vec2():trim(a, 0.5)
|
|
|
|
assert.is_true(abs(b:len() - 1) < DBL_EPSILON)
|
|
assert.is_true(abs(b:len() - 1) < DBL_EPSILON)
|
|
assert.is_true(abs(b:len2() - 1) < DBL_EPSILON * 2)
|
|
assert.is_true(abs(c:len() - 0.5) < DBL_EPSILON)
|
|
end)
|
|
|
|
it("tests distance", function()
|
|
local a = vec2(3, 5)
|
|
local b = vec2(7, 4)
|
|
|
|
-- Distance
|
|
do
|
|
local c = a:dist(b)
|
|
assert.is.equal(c, sqrt(17))
|
|
end
|
|
|
|
-- Distance Squared
|
|
do
|
|
local c = a:dist2(b)
|
|
assert.is.equal(c, 17)
|
|
end
|
|
end)
|
|
|
|
it("tests cross product", function()
|
|
local a = vec2(3, 5)
|
|
local b = vec2(7, 4)
|
|
local c = a:cross(b)
|
|
|
|
assert.is.equal(c, -23)
|
|
end)
|
|
|
|
it("tests dot product", function()
|
|
local a = vec2(3, 5)
|
|
local b = vec2(7, 4)
|
|
local c = a:dot(b)
|
|
|
|
assert.is.equal(c, 41)
|
|
end)
|
|
|
|
it("tests lerp", function()
|
|
local a = vec2(3, 5)
|
|
local b = vec2(7, 4)
|
|
local s = 0.1
|
|
local c = vec2():lerp(a, b, s)
|
|
|
|
assert.is.equal(c.x, 3.4)
|
|
assert.is.equal(c.y, 4.9)
|
|
end)
|
|
|
|
it("tests unpack", function()
|
|
local a = vec2(3, 5)
|
|
local x, y = a:unpack()
|
|
|
|
assert.is.equal(x, 3)
|
|
assert.is.equal(y, 5)
|
|
end)
|
|
|
|
it("tests rotate", function()
|
|
local a = vec2(3, 5)
|
|
local b = vec2():rotate(a, math.pi)
|
|
local c = vec2():rotate(b, -math.pi)
|
|
|
|
assert.is.equal(c.x, 3)
|
|
assert.is.equal(c.y, 5)
|
|
end)
|
|
|
|
it("tests converting coordinates", function()
|
|
local a = vec2(3, 5)
|
|
local r, t = a:to_polar()
|
|
local b = vec2.from_cartesian(r, t)
|
|
|
|
assert.is.equal(b.x, a.x)
|
|
assert.is.equal(b.y, a.y)
|
|
end)
|
|
|
|
it("tests perpendicular", function()
|
|
local a = vec2(3, 5)
|
|
local b = vec2():perpendicular(a)
|
|
|
|
assert.is.equal(b.x, -5)
|
|
assert.is.equal(b.y, 3)
|
|
end)
|
|
end)
|