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local Node = {}
Node.prototype = {}
Node.prototype.updateTransform = function(self)
self.transform:eye()
self.transform:translate(self.position)
self.transform:rotateZ(self.rotation:get(2))
self.transform:rotateY(self.rotation:get(1))
self.transform:rotateX(self.rotation:get(0))
self.transform:scalev(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.updateCascade = function(self, dt)
if self.update then
self:update(dt)
end
self:updateTransform()
for _, child in ipairs(self.children) do
child:updateCascade(dt)
end
end
Node.prototype.drawCascade = function(self, camera, shader)
if self.draw then
self:draw(camera, shader)
end
-- do not draw base nodes, but recursively draw children.
for _, child in ipairs(self.children) do
child:drawCascade(camera, shader)
end
end
Node.prototype.translate = function(self, translation)
self.position:add(translation, self.position)
end
local rotationAxes = { x=0, y=1, z=2 }
function Node.prototype.rotate(self, axis, angle)
local index = rotationAxes[axis]
local oldAngle = self.rotation:get(index)
self.rotation:set(index, oldAngle + 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
if not position then node.position = honey.glm.vec3{0,0,0}
else node.position = position end
if not rotation then node.rotation = honey.glm.vec3{0,0,0}
else node.rotation = rotation end
if not scale then node.scale = honey.glm.vec3{1,1,1}
else node.scale = scale end
node.children = {}
if parent ~= nil then
local index = #parent.children
parent.children[index + 1] = node
end
node.transform = honey.glm.mat4()
node.transform:eye()
node:updateTransform()
return node
end
return Node
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