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# frozen_string_literal: true
Dir[File.join(__dir__, 'wrappers', '*.rb')].sort.each { |file| require file }
# Handles rendering objects relative
# to a camera location
module Camera
class <<self
private
# Contains all objects that are tracked
def objects
@objects ||= []
end
end
def self.debug_x
@debug_x ||= 0
end
def self.debug_x=(debug_x)
@debug_x = debug_x
end
def self.debug_y
@debug_y ||= 0
end
def self.debug_y=(debug_y)
@debug_y = debug_y
end
# Adding objects so they are
# tracked by the Camera
def self.<<(item)
case item
when Triangle
item.extend Camera::TriangleWrapped
when Square
item.extend Camera::SquareWrapped
when Rectangle
item.extend Camera::RectangleWrapped
when Quad
item.extend Camera::QuadWrapped
when Line
item.extend Camera::LineWrapped
when Circle
item.extend Camera::CircleWrapped
when Image
item.extend Camera::ImageWrapped
when Sprite
item.extend Camera::SpriteWrapped
when Text
item.extend Camera::TextWrapped
else
puts 'Warning: Non-standard Object added to Camera'
puts ' Object may not behave as expected'
end
objects.push(item) unless objects.include?(item)
end
def self.remove(item)
objects.delete(item) if objects.include?(item)
end
# Redraw all objects that
# are tracked by the Camera
def self.redraw(auto_purge: false)
if auto_purge
objects.each do |item|
if item.nil?
puts 'Warning: Nil Object detected in Camera'
puts ' Nil Object removed'
objects.delete(obj)
else
item.redraw
end
end
else
objects.each(&:redraw)
end
end
# Convert screenspace coordinates into worldspace camera ones
def self.coordinate_to_worldspace(x, y)
angle = Camera.angle * (Math::PI / 180)
half_width = Window.width * 0.5
half_height = Window.height * 0.5
[(((x - half_width) / zoom) * Math.cos(-angle)) - (((y - half_height) / zoom) * Math.sin(-angle)) + self.x,
(((x - half_width) / zoom) * Math.sin(-angle)) + (((y - half_height) / zoom) * Math.cos(-angle)) + self.y]
end
# Convert worldspace camera coordinates into screenspace ones
def self.coordinate_to_screenspace(x, y)
angle = Camera.angle * (Math::PI / 180)
[(((x - Camera.x) * Math.cos(angle)) - ((y - Camera.y) * Math.sin(angle))) * Camera.zoom + (Window.width * 0.5),
(((x - Camera.x) * Math.sin(angle)) + ((y - Camera.y) * Math.cos(angle))) * Camera.zoom + (Window.height * 0.5)]
end
def self.mouse
coordinate_to_worldspace(Window.mouse_x, Window.mouse_y)
end
# Variables changing Camera properties
def self._x(x)
@x += x
end
def self._y(y)
@y += y
end
def self.x
@x ||= 0
end
def self.x=(x)
@x = x
end
def self.y
@y ||= 0
end
def self.y=(y)
@y = y
end
def self.zoom
@zoom ||= 1.0
end
def self.zoom=(zoom)
@zoom = zoom
end
def self.angle
@angle ||= 0
end
def self.angle=(angle)
angle %= 360
@angle = angle
end
end
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