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module Jamstack
class TouchControls
attr_reader :joystick_vector
def initialize(joystick_x: 100, joystick_y: nil, joystick_radius: 60)
sw = Rl.screen_width
sh = Rl.screen_height
@jbx = joystick_x
@jby = joystick_y || (sh - joystick_x)
@jbr = joystick_radius
@jknob_x = 0
@jknob_y = 0
@jvec = Rl::Vector2.new(0, 0)
@jactive = false
@jtouch_id = -1
@buttons = []
end
def add_button(name, x:, y:, radius: 40, label: nil)
@buttons << {
name: name, x: x, y: y, r: radius,
label: label || name.to_s.upcase,
touch_id: -1, held: false, prev: false
}
self
end
def update
count = Rl.get_touch_point_count
ids = []
count.times { |i| ids << [Rl.get_touch_point_id(i), Rl.get_touch_position(i)] }
update_joystick(ids)
update_buttons(ids)
end
def joystick
@jvec
end
def button_down?(name)
b = find_button(name)
b && b[:held]
end
def button_pressed?(name)
b = find_button(name)
b && b[:held] && !b[:prev]
end
def draw
draw_joystick
@buttons.each { |b| draw_button(b) }
end
private
def update_joystick(touches)
if @jactive
match = touches.find { |id, _| id == @jtouch_id }
if match
_, pos = match
dx = pos.x - @jbx
dy = pos.y - @jby
dist = Math.sqrt(dx * dx + dy * dy)
if dist > @jbr
dx = dx * @jbr / dist
dy = dy * @jbr / dist
end
@jknob_x = dx
@jknob_y = dy
@jvec = Rl::Vector2.new(dx / @jbr, dy / @jbr)
else
reset_joystick
end
else
match = touches.find { |_, pos| dist(pos.x, pos.y, @jbx, @jby) <= @jbr }
if match
@jactive = true
@jtouch_id = match[0]
end
end
end
def reset_joystick
@jactive = false
@jtouch_id = -1
@jknob_x = 0
@jknob_y = 0
@jvec = Rl::Vector2.new(0, 0)
end
def update_buttons(touches)
@buttons.each do |b|
b[:prev] = b[:held]
if b[:touch_id] >= 0
if touches.any? { |id, _| id == b[:touch_id] }
b[:held] = true
else
b[:held] = false
b[:touch_id] = -1
end
elsif !b[:held]
match = touches.find { |_, pos| dist(pos.x, pos.y, b[:x], b[:y]) <= b[:r] }
if match
b[:touch_id] = match[0]
b[:held] = true
end
end
end
end
def find_button(name)
@buttons.find { |b| b[:name] == name }
end
def dist(x1, y1, x2, y2)
dx = x1 - x2; dy = y1 - y2
Math.sqrt(dx * dx + dy * dy)
end
def draw_joystick
c_base = Rl::Color.new(255, 255, 255, 40)
c_ring = Rl::Color.new(255, 255, 255, 120)
c_knob = Rl::Color.new(200, 210, 240, 180)
Rl.draw_circle(@jbx, @jby, @jbr, c_base)
Rl.draw_circle_lines(@jbx, @jby, @jbr, c_ring)
Rl.draw_circle(@jbx + @jknob_x, @jby + @jknob_y, @jbr / 3, c_knob)
end
def draw_button(b)
alpha = b[:held] ? 200 : 60
fill = Rl::Color.new(150, 200, 255, alpha)
ring = Rl::Color.new(255, 255, 255, 120)
Rl.draw_circle(b[:x], b[:y], b[:r], fill)
Rl.draw_circle_lines(b[:x], b[:y], b[:r], ring)
Rl.draw_text(text: b[:label], x: b[:x] - 6, y: b[:y] - 8,
font_size: 16, color: Rl::Color.new(255, 255, 255, 200))
end
end
end
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