1// SuperTux
2// Copyright (C) 2006 Matthias Braun <matze@braunis.de>
3//
4// This program is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8//
9// This program is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12// GNU General Public License for more details.
13//
14// You should have received a copy of the GNU General Public License
15// along with this program. If not, see <http://www.gnu.org/licenses/>.
16
17#include "supertux/shrinkfade.hpp"
18
19#include "supertux/globals.hpp"
20#include "video/drawing_context.hpp"
21#include "video/video_system.hpp"
22#include "video/viewport.hpp"
23
24ShrinkFade::ShrinkFade(const Vector& dest_, float fade_time_) :
25 m_dest(dest_),
26 m_fade_time(fade_time_),
27 m_accum_time(0),
28 m_initial_size(static_cast<float>(SCREEN_HEIGHT > SCREEN_WIDTH ? SCREEN_HEIGHT : SCREEN_WIDTH))
29{
30}
31
32void
33ShrinkFade::update(float dt_sec)
34{
35 m_accum_time += dt_sec;
36 if (m_accum_time > m_fade_time)
37 m_accum_time = m_fade_time;
38}
39
40void
41ShrinkFade::draw(DrawingContext& context)
42{
43 float progress = m_accum_time / m_fade_time;
44 float diameter = 2 * m_initial_size * (1.0f - progress);
45 context.color().draw_inverse_ellipse(m_dest, Vector(1.1f * diameter, diameter),
46 Color(0, 0, 0), LAYER_GUI + 1);
47}
48
49bool
50ShrinkFade::done() const
51{
52 return m_accum_time >= m_fade_time;
53}
54
55/* EOF */
56