blob: db6e3fc40b9957712a6fda00a1be587849f29002 (
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FF::Scn::Render.add(
# Update the position of the sprite according
# to camera values before the sprite is rendered
FF::Sys.new('Camera', priority: 97) do
camera = FF::Cmp::SingletonCamera[0]
camera.entities.each do |ent|
sprite = ent.components[FF::Cmp::Sprite][0].props
angle = camera.angle * (Math::PI / 180)
half_width = $gtk.args.grid.w * 0.5
half_height = $gtk.args.grid.h * 0.5
offset_x = sprite[:x] + (sprite[:w] / 2)
offset_y = sprite[:y] + (sprite[:h] / 2)
temp_x = (((offset_x - camera.x) * Math.cos(angle)) - ((offset_y - camera.y) * Math.sin(angle))) \
* camera.zoom + half_width - (sprite[:w] * camera.zoom / 2)
temp_y = (((offset_x - camera.x) * Math.sin(angle)) + ((offset_y - camera.y) * Math.cos(angle))) \
* camera.zoom + half_height - (sprite[:h] * camera.zoom / 2)
temp_rotate = sprite[:angle] + camera.angle
temp_width = sprite[:w] * camera.zoom
temp_height = sprite[:h] * camera.zoom
sprite[:x] = temp_x
sprite[:y] = temp_y
sprite[:w] = temp_width
sprite[:h] = temp_height
sprite[:angle] = temp_rotate
end
end
)
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