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source: orxonox.OLD/trunk/src/lib/graphics/effects/fog_effect.cc @ 8538

Last change on this file since 8538 was 8495, checked in by bensch, 18 years ago

merged the branche atmos back. no conflicts

File size: 5.0 KB
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1/*
2  orxonox - the future of 3D-vertical-scrollers
3
4  Copyright (C) 2004 orx
5
6  This program is free software; you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation; either version 2, or (at your option)
9  any later version.
10
11### File Specific:
12  main-programmer: hdavid, amaechler
13*/
14
15#include "fog_effect.h"
16
17#include "util/loading/load_param.h"
18#include "util/loading/factory.h"
19
20#include "shell_command.h"
21
22SHELL_COMMAND(activate, FogEffect, activateFog);
23SHELL_COMMAND(deactivate, FogEffect, deactivateFog);
24SHELL_COMMAND(fadein, FogEffect, fadeInFog);
25SHELL_COMMAND(fadeout, FogEffect, fadeOutFog);
26
27// TODO: Fix fades
28
29using namespace std;
30
31CREATE_FACTORY(FogEffect, CL_FOG_EFFECT);
32
33FogEffect::FogEffect(const TiXmlElement* root) {
34    this->setClassID(CL_FOG_EFFECT, "FogEffect");
35
36    this->init();
37
38    if (root != NULL)
39        this->loadParams(root);
40
41    if (this->fogActivate)
42        this->activate();
43}
44
45
46FogEffect::~FogEffect() {
47    this->deactivate();
48}
49
50
51void FogEffect::loadParams(const TiXmlElement* root) {
52    WeatherEffect::loadParams(root);
53
54    LoadParam(root, "mode", this, FogEffect, setFogMode);
55    LoadParam(root, "density", this, FogEffect, setFogDensity);
56    LoadParam(root, "range", this, FogEffect, setFogRange);
57    LoadParam(root, "color", this, FogEffect, setFogColor);
58    LoadParam(root, "fadeinduration", this, FogEffect, setFogFadeIn);
59    LoadParam(root, "fadeoutduration", this, FogEffect, setFogFadeOut);
60
61    LOAD_PARAM_START_CYCLE(root, element);
62    {
63        LoadParam_CYCLE(element, "option", this, FogEffect, setFogOption);
64    }
65    LOAD_PARAM_END_CYCLE(element);
66}
67
68void FogEffect::init() {
69    // default values
70    this->fogMode = GL_LINEAR;
71    this->fogDensity = 0.03;
72    this->fogStart = 0;
73    this->fogEnd = 50;
74    this->colorVector = Vector(0.3, 0.3, 0.3);
75
76    // init variables
77    this->fogFadeInDuration = 0;
78    this->fogFadeOutDuration = 0;
79    this->fogFadeDensity = 0;
80    this->localTimer = 0;
81    this->fogActivate = false;
82    this->fogFadeInActivate = false;
83    this->fogFadeOutActivate = false;
84
85}
86
87
88void FogEffect::activate() {
89    PRINTF(0)( "Enabling FogEffect, mode: %i, density: %f, start: %f, end: %f, color %f, %f, %f\n", this->fogMode, this->fogDensity, this->fogStart, this->fogEnd, this->colorVector.x, this->colorVector.y, this->colorVector.z);
90
91    this->fogActivate = true;
92
93    GLfloat fogColor[4] = { colorVector.x, colorVector.y, colorVector.z, 1.0};
94    glFogi(GL_FOG_MODE, this->fogMode);
95    glFogfv(GL_FOG_COLOR, fogColor);
96    glHint(GL_FOG_HINT, GL_DONT_CARE);
97    glFogf(GL_FOG_DENSITY, this->fogDensity);
98    glFogf(GL_FOG_START, this->fogStart);
99    glFogf(GL_FOG_END, this->fogEnd);
100
101    glEnable(GL_FOG);
102
103}
104
105
106void FogEffect::deactivate() {
107    PRINTF(0)("Deactivating FogEffect\n");
108
109    this->fogFadeInActivate = false;
110    this->fogFadeOutActivate = false;
111    this->fogActivate = false;
112
113    glDisable(GL_FOG);
114
115}
116
117void FogEffect::draw() const {
118
119    if (!this->fogActivate)
120        return;
121
122    // If Fog Fade
123    if ( this->fogFadeInActivate || this->fogFadeOutActivate )
124        glFogf(GL_FOG_DENSITY, this->fogFadeDensity);
125
126}
127
128void FogEffect::tick(float dt) {
129    if (!this->fogActivate)
130        return;
131
132    if ( this->fogFadeInActivate ) {
133        this->localTimer += dt;
134        this->fogFadeDensity = ( this->localTimer / this->fogFadeInDuration ) * this->fogDensity;
135
136        if ( this->localTimer >= this->fogFadeOutDuration )
137            this->fogFadeInActivate = false;
138    }
139
140    if ( this->fogFadeOutActivate ) {
141        this->localTimer += dt;
142        this->fogFadeDensity = 1 - (( this->localTimer / this->fogFadeInDuration ) * this->fogDensity);
143
144        if ( this->localTimer >= this->fogFadeOutDuration )
145            this->deactivate();
146    }
147}
148
149void FogEffect::fadeInFog() {
150
151    // If Fog is already fading out, stop it
152    this->fogFadeOutActivate = false;
153
154    // If Fog is already on, turn it off first
155    if (this->fogActivate)
156        this->deactivate();
157
158    // If no manual FadeIn value was set, set a default value
159    if (!this->fogFadeInDuration > 0)
160        this->fogFadeInDuration = 20;
161
162    // Reset local timer
163    this->localTimer = 0;
164
165    // set FogFadeIn activate
166    this->fogFadeInActivate = true;
167
168    // Activate Fog
169    this->activate();
170
171}
172
173
174void FogEffect::fadeOutFog() {
175
176    // If Fog is already fading in, stop it
177    this->fogFadeInActivate = false;
178
179    // If Fog is off, turn it on first
180    if (!this->fogActivate)
181        this->activate();
182
183    // If no manual FadeOut value was set, set a default value
184    if (!this->fogFadeOutDuration > 0)
185        this->fogFadeOutDuration = 20;
186
187    // set FogFadeOut activate
188    this->fogFadeOutActivate = true;
189
190    // Reset local timer
191    this->localTimer = 0;
192
193}
194
195
196GLint FogEffect::stringToFogMode(const std::string& mode) {
197    if(mode == "GL_LINEAR")
198        return GL_LINEAR;
199    else if(mode == "GL_EXP")
200        return GL_EXP;
201    else if(mode == "GL_EXP2" )
202        return GL_EXP2;
203    else
204        return -1;
205}
206
207
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