1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
local Vector = require('Vector')
local Matrix = require('Matrix')
local Node = {}
Node.prototype = {}
Node.prototype.updateTransform = function(self)
honey.cglm.mat4.identity(self.transform.array)
self.transform:translate(self.position)
self.transform:rotate(Vector.Vec3.ZERO, Vector.Vec3.Z_UNIT, self.rotation:at(2))
self.transform:rotate(Vector.Vec3.ZERO, Vector.Vec3.Y_UNIT, self.rotation:at(1))
self.transform:rotate(Vector.Vec3.ZERO, Vector.Vec3.X_UNIT, self.rotation:at(0))
self.transform:scale(self.scale)
if self.parent ~= nil then
self.parent.transform:mul(self.transform, self.transform)
end
for _, child in ipairs(self.children) do
child:updateTransform()
end
end
Node.prototype.draw = function(self, camera, shader)
-- do not draw base nodes, but recursively draw children.
for _, child in ipairs(self.children) do
child:draw(camera, shader)
end
end
Node.prototype.translate = function(self, translation)
self.position:add(translation, self.position)
end
Node.prototype.pitch = function(self, angle)
self.rotation:setAt(0, self.rotation:at(0) + angle)
end
Node.prototype.yaw = function(self, angle)
self.rotation:setAt(1, self.rotation:at(1) + angle)
end
Node.prototype.roll = function(self, angle)
self.rotation:setAt(2, self.rotation:at(2) + angle)
end
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Node.mt = {}
Node.mt.__index = Node.prototype
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Node.new = function(parent, position, rotation, scale)
local node = {}
setmetatable(node, Node.mt)
node.parent = parent
node.position = position
node.rotation = rotation
node.scale = scale
node.children = {}
if parent ~= nil then
local index = #parent.children
parent.children[index + 1] = node
end
node.transform = Matrix.Mat4.eye()
node:updateTransform()
return node
end
return Node
|
