add basic node types

1 files changed, 34 insertions, 0 deletions

diff --git a/demo/Camera.lua b/demo/Camera.lua
new file mode 100644
index 0000000..de14b6c
--- /dev/null
+++ b/demo/Camera.lua
@@ -0,0 +1,34 @@
+local Vector = require('Vector')
+local Matrix = require('Matrix')
+local Node = require('Node')
+
+local Camera = {}
+
+Camera.prototype = {}
+setmetatable(Camera.prototype, { __index = Node.prototype })
+
+Camera.prototype.updateView = function(self)
+   self.basis = self.transform:basis()
+   Matrix.Mat4.look(self.position, self.basis.z, self.basis.y, self.view)
+end
+
+-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Camera.mt = {}
+Camera.mt.__index = Camera.prototype
+
+-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Camera.new = function(parent, position, rotation, scale, fov, aspect, near, far)
+   local camera = Node.new(parent, position, rotation, scale)
+   setmetatable(camera, Camera.mt)
+
+   camera.view = Matrix.Mat4.new()
+   camera:updateView()
+   camera.projection = Matrix.Mat4.perspective(fov, aspect, near, far)
+
+   return camera
+end
+
+return Camera
+