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#! /usr/bin/env lua
-- vim:sw=4:sts=4
-- This is the "test-actors.c" example from the clutter-0.8 source.
--
require "clutter"
n_hands = 6
stage_w = 800
stage_h = 800
radius = math.sqrt(stage_w * stage_h) / 3
hands = {}
imgfile = string.gsub(arg[0], "[%w.-]+$", "redhand.png")
-- Input handler
function input_cb(stage, event)
local x, y, e, name
if event.type == clutter.BUTTON_PRESS then
x, y = event:get_coords(0, 0)
e = stage:get_actor_at_pos(x, y)
if e then
name = e:get_type()
if name == "ClutterTexture" or name == "ClutterCloneTexture" then
e:hide()
return true
end
end
end
if event.type == clutter.KEY_RELEASE then
event = gnome.cast(event, "ClutterKeyEvent")
sym = event:symbol()
if sym == string.byte"q" then
clutter.main_quit()
return true
end
if sym == string.byte"r" then
for _, hand in ipairs(hands) do
hand:show()
end
return true
end
if sym == string.byte" " then
if timeline:is_playing() then
timeline:pause()
else
timeline:start()
end
end
end
end
-- Update the rotation of the whole group and the individual hands.
function frame_cb(timeline, frame_nr)
group:set_rotation(clutter.Z_AXIS, frame_nr, stage_w/2, stage_h/2, 0)
for i, hand in ipairs(hands) do
local x, y = hand:get_scale(0, 0)
hand:set_rotation(clutter.Z_AXIS, -6 * frame_nr, 0, 0, 0)
end
-- show the hands after the first update.
group:show()
end
function test_actors_main()
local w, h, hand, d, x, y
stage = clutter.stage_get_default()
stage:set_size(800, 800)
stage:set_title("Actors Test")
local stage_color = clutter.new "Color"
stage_color:from_pixel(0x61648cff)
stage:set_color(stage_color)
timeline = clutter.timeline_new(360, 10); -- num frames, fps
timeline:set("loop", true, nil)
timeline:connect('new-frame', frame_cb)
stage:connect('button-press-event', input_cb)
stage:connect('key-release-event', input_cb)
cl = gnome.closure(clutter.sine_func)
alpha = clutter.alpha_new_full(timeline, cl, nil, nil)
scaler_1 = clutter.behaviour_scale_new(alpha, 0.5, 0.5, 1.0, 1.0)
scaler_2 = clutter.behaviour_scale_new(alpha, 1.0, 1.0, 0.5, 0.5)
-- group to hold multiple actors
group = clutter.group_new()
for i = 1, n_hands do
if i == 1 then
hand, err = clutter.texture_new_from_file(imgfile, gnome.NIL)
if not hand then error(err.message) end
w = hand:get_width()
h = hand:get_height()
else
hand = clutter.clone_texture_new(hands[1])
end
d = (i-1) * math.pi / (n_hands / 2)
x = stage_w / 2 + radius * math.cos(d) - w / 2
y = stage_h / 2 + radius * math.sin(d) - h / 2
hand:set_position(x, y)
hand:move_anchor_point_from_gravity(clutter.GRAVITY_CENTER)
group:add_actor(hand)
if i % 2 == 0 then
scaler_1:apply(hand)
else
scaler_2:apply(hand)
end
hands[i] = hand
end
stage:add_actor(group)
-- don't initially show the hands.
group:hide()
timeline:start()
stage:show()
end
function main()
clutter.init(0, nil)
test_actors_main()
clutter.main()
end
main()
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