1 /* ScummVM - Graphic Adventure Engine
2 *
3 * ScummVM is the legal property of its developers, whose names
4 * are too numerous to list here. Please refer to the COPYRIGHT
5 * file distributed with this source distribution.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 *
21 */
22
23 #include "common/scummsys.h"
24
25 #include "zvision/scripting/effects/distort_effect.h"
26
27 #include "zvision/zvision.h"
28 #include "zvision/scripting/script_manager.h"
29 #include "zvision/graphics/render_manager.h"
30 #include "zvision/graphics/render_table.h"
31
32 #include "common/stream.h"
33
34 namespace ZVision {
35
DistortNode(ZVision * engine,uint32 key,int16 speed,float startAngle,float endAngle,float startLineScale,float endLineScale)36 DistortNode::DistortNode(ZVision *engine, uint32 key, int16 speed, float startAngle, float endAngle, float startLineScale, float endLineScale)
37 : ScriptingEffect(engine, key, SCRIPTING_EFFECT_DISTORT) {
38
39 _angle = _engine->getRenderManager()->getRenderTable()->getAngle();
40 _linScale = _engine->getRenderManager()->getRenderTable()->getLinscale();
41
42 _speed = speed;
43 _incr = true;
44 _startAngle = startAngle;
45 _endAngle = endAngle;
46 _startLineScale = startLineScale;
47 _endLineScale = endLineScale;
48
49 _curFrame = 1.0;
50
51 _diffAngle = endAngle - startAngle;
52 _diffLinScale = endLineScale - startLineScale;
53
54 _frmSpeed = (float)speed / 15.0;
55 _frames = (int)ceil((5.0 - _frmSpeed * 2.0) / _frmSpeed);
56 if (_frames <= 0)
57 _frames = 1;
58
59 if (_key != StateKey_NotSet)
60 _engine->getScriptManager()->setStateValue(_key, 1);
61 }
62
~DistortNode()63 DistortNode::~DistortNode() {
64 setParams(_angle, _linScale);
65 }
66
process(uint32 deltaTimeInMillis)67 bool DistortNode::process(uint32 deltaTimeInMillis) {
68 float updTime = deltaTimeInMillis / (1000.0 / 60.0);
69
70 if (_incr)
71 _curFrame += updTime;
72 else
73 _curFrame -= updTime;
74
75 if (_curFrame < 1.0) {
76 _curFrame = 1.0;
77 _incr = true;
78 } else if (_curFrame > _frames) {
79 _curFrame = _frames;
80 _incr = false;
81 }
82
83 float diff = (1.0 / (5.0 - (_curFrame * _frmSpeed))) / (5.0 - _frmSpeed);
84 setParams(_startAngle + diff * _diffAngle, _startLineScale + diff * _diffLinScale);
85
86 return false;
87 }
88
setParams(float angl,float linScale)89 void DistortNode::setParams(float angl, float linScale) {
90 RenderTable *table = _engine->getRenderManager()->getRenderTable();
91 if (table->getRenderState() == RenderTable::PANORAMA) {
92 table->setPanoramaFoV(angl);
93 table->setPanoramaScale(linScale);
94 table->generateRenderTable();
95 _engine->getRenderManager()->markDirty();
96 } else if (table->getRenderState() == RenderTable::TILT) {
97 table->setTiltFoV(angl);
98 table->setTiltScale(linScale);
99 table->generateRenderTable();
100 _engine->getRenderManager()->markDirty();
101 }
102 }
103
104 } // End of namespace ZVision
105