2 // Copyright (C) 2006 Matthias Braun <matze@braunis.de>
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.
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.
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/>.
17 #include "supertux/main.hpp"
18 #include "supertux/shrinkfade.hpp"
19 #include "video/drawing_context.hpp"
21 ShrinkFade::ShrinkFade(const Vector& dest, float fade_time)
22 : dest(dest), fade_time(fade_time), accum_time(0)
24 speedleft = dest.x / fade_time;
25 speedright = (SCREEN_WIDTH - dest.x) / fade_time;
26 speedtop = dest.y / fade_time;
27 speedbottom = (SCREEN_HEIGHT - dest.y) / fade_time;
30 ShrinkFade::~ShrinkFade()
35 ShrinkFade::update(float elapsed_time)
37 accum_time += elapsed_time;
38 if(accum_time > fade_time)
39 accum_time = fade_time;
43 ShrinkFade::draw(DrawingContext& context)
45 float progress = accum_time / fade_time;
46 context.draw_inverse_ellipse(dest,
47 Vector(2*SCREEN_WIDTH * (1.0f - progress),
48 2*SCREEN_HEIGHT * (1.0f - progress)),
49 Color(0, 0, 0), LAYER_GUI+1);
55 return accum_time >= fade_time;