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source: orxonox.OLD/trunk/src/lib/graphics/effects/volfog_effect.cc @ 9646

Last change on this file since 9646 was 9406, checked in by bensch, 18 years ago

orxonox/trunk: merged the proxy back

merged with commandsvn merge -r9346:HEAD https://svn.orxonox.net/orxonox/branches/proxy .

no conflicts

File size: 5.4 KB
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[7504]1/*
[8495]2  orxonox - the future of 3D-vertical-scrollers
[7504]3
[8495]4  Copyright (C) 2004 orx
[7504]5
[8495]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.
[7504]10
11### File Specific:
[8495]12  main-programmer: hdavid, amaechler
[7504]13*/
14
15#include "volfog_effect.h"
16
17#include "util/loading/load_param.h"
18#include "util/loading/factory.h"
19
[7760]20#include "p_node.h"
21#include "state.h"
22
[8495]23#include "glincl.h"
24//#include "shell_command.h"
[7504]25
[7759]26#define GLX_GLXEXT_PROTOTYPES
[8523]27//#include <GL/glx.h>
[7795]28// #include <GL/glut.h>
[7759]29
30//#include <GL/glext.h> //OpenGL Extensions
[8316]31//#include <GL/glxext.h> // GLX Extensions
[7759]32
33#ifndef GL_EXT_fog_coord
34#define GL_EXT_fog_coord 1
35typedef void (APIENTRY * PFNGLFOGCOORDFEXTPROC) (GLfloat coord);
36typedef void (APIENTRY * PFNGLFOGCOORDFVEXTPROC) (const GLfloat *coord);
37typedef void (APIENTRY * PFNGLFOGCOORDDEXTPROC) (GLdouble coord);
38typedef void (APIENTRY * PFNGLFOGCOORDDVEXTPROC) (const GLdouble *coord);
39typedef void (APIENTRY * PFNGLFOGCOORDPOINTEREXTPROC) (GLenum type, GLsizei stride, const GLvoid *pointer);
40#endif
41
42PFNGLFOGCOORDFEXTPROC glFogCoordfEXT = 0;
43PFNGLFOGCOORDFVEXTPROC glFogCoordfvEXT = 0;
44PFNGLFOGCOORDDEXTPROC glFogCoorddEXT = 0;
45PFNGLFOGCOORDDVEXTPROC glFogCoorddvEXT = 0;
46PFNGLFOGCOORDPOINTEREXTPROC glFogCoordPointerEXT = 0;
47
48
[7504]49
[9406]50
[7504]51CREATE_FACTORY(VolFogEffect, CL_VOLFOG_EFFECT);
52
[8495]53VolFogEffect::VolFogEffect(const TiXmlElement* root) {
54    this->setClassID(CL_VOLFOG_EFFECT, "VolFogEffect");
[7504]55
[8495]56    if (root != NULL)
57        this->loadParams(root);
[7532]58
[8495]59    // Initialize Effect
60    this->init();
[7546]61
[8495]62    // Activate Effect
63    this->activate();
[7504]64}
65
66
[8495]67VolFogEffect::~VolFogEffect() {
68    this->deactivate();
[7504]69}
70
[8495]71void VolFogEffect::loadParams(const TiXmlElement* root) {
72    WeatherEffect::loadParams(root);
[7504]73}
74
[8495]75void VolFogEffect::init() {
[9006]76    PRINTF(3)("Initalize VolFogEffect\n");
[7504]77
[8495]78    // set fog mode
79    GLenum fogMode  = GL_EXP;
[7759]80
[8495]81    // set fog density
82    float  fogDensity  = 0.001f;
[7759]83
[8495]84    // set fog near & far distance
85    float fogStart = 0.0f;
86    float fogEnd   = 1000.0f;
[7759]87
[8495]88    // Set fog color
89    float fogColor[4] = {0.6f,0.58f,0.79f,0.0f};
[7504]90
[8316]91
[8523]92    /*    glFogCoordfEXT       = (PFNGLFOGCOORDFEXTPROC)glXGetProcAddressARB((const GLubyte*)"glFogCoordfEXT");
[8495]93    glFogCoordfvEXT      = (PFNGLFOGCOORDFVEXTPROC)glXGetProcAddressARB((const GLubyte*)"glFogCoordfvEXT");
94    glFogCoorddEXT       = (PFNGLFOGCOORDDEXTPROC)glXGetProcAddressARB((const GLubyte*)"glFogCoorddEXT");
95    glFogCoorddvEXT      = (PFNGLFOGCOORDDVEXTPROC)glXGetProcAddressARB((const GLubyte*)"glFogCoorddvEXT");
96    glFogCoordPointerEXT = (PFNGLFOGCOORDPOINTEREXTPROC)glXGetProcAddressARB((const GLubyte*)"glFogCoordPointerEXT");
[8523]97    */
[8495]98    // set the fog attributes
99    glFogf (GL_FOG_START,  fogStart);
100    glFogf (GL_FOG_END,    fogEnd);
101    glFogfv(GL_FOG_COLOR,  fogColor);
102    glFogi (GL_FOG_MODE,   fogMode);
103    glFogf (GL_FOG_DENSITY,fogDensity);
104    glFogi (GL_FOG_COORDINATE_SOURCE_EXT,GL_FOG_COORDINATE_EXT);
[7561]105
[8495]106    // enable the fog
107    glEnable(GL_FOG);
[7557]108
[8495]109    if (glewInit() == GLEW_OK)
[9006]110        PRINTF(4)("glewInit OK\n");
[8495]111    else
[9006]112        PRINTF(4)("glewInit failed\n");
[7759]113
[8495]114    if (glewGetExtension("GL_EXT_fog_coord"))
[9006]115        PRINTF(4)("GL_EXT_fog_coord extension found\n");
[7546]116}
117
118
[8495]119void VolFogEffect::activate() {
[9006]120    PRINTF(3)("Activating VolFogEffect\n");
[7504]121}
122
[8495]123void VolFogEffect::deactivate() {
[9006]124    PRINTF(3)("Deactivating VolFogEffect\n");
[7760]125
[8495]126    glDisable(GL_FOG);
[7504]127}
128
[7520]129
[7516]130/**
[7652]131* draws the effect, if needed
132*/
[8495]133void VolFogEffect::draw() const {
134    glPushAttrib(GL_ENABLE_BIT);
135    glClearColor(fogColor[0],fogColor[1],fogColor[2],0.0f);
136    glShadeModel(GL_SMOOTH);
137    glEnable(GL_DEPTH_TEST);
138    glEnable(GL_CULL_FACE);
139    glCullFace(GL_BACK);
[7760]140
[8495]141    /* clear all pixels in colour buffer */
142    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
[7530]143
[8495]144    /* Enable blending */
145    //glEnable(GL_BLEND);
146    //glBlendFunc(GL_SRC_ALPHA, GL_DST_ALPHA);
[8316]147
[8495]148    int i;
149    glLoadIdentity();
[7558]150
[8316]151
[8495]152    glBegin( GL_LINES );
153    glNormal3f(0,1,0);
154    for(i=-20;i<=20;i+=2) {
155        float fog_c;
156        float diff[3];
[7520]157
[8495]158        diff[0] = State::getCameraNode()->getAbsCoor().x - i;
159        diff[2] = State::getCameraNode()->getAbsCoor().z + 20;
160        diff[1] = State::getCameraNode()->getAbsCoor().y;
161        fog_c = 1.3f*sqrt(diff[0]*diff[0]+diff[1]*diff[1]+diff[2]*diff[2]);
162        glFogCoordfEXT(fog_c*2);
163        glVertex3f(i,0,-20);
[7520]164
[8495]165        diff[0] = State::getCameraNode()->getAbsCoor().x - i;
166        diff[2] = State::getCameraNode()->getAbsCoor().z + 20;
167        diff[1] = State::getCameraNode()->getAbsCoor().y;
168        fog_c = 1.3f*sqrt(diff[0]*diff[0]+diff[1]*diff[1]+diff[2]*diff[2]);
169        glFogCoordfEXT(fog_c*2);
170        glVertex3f(i,0,20);
[7520]171
[8495]172        diff[0] = State::getCameraNode()->getAbsCoor().x - i;
173        diff[2] = State::getCameraNode()->getAbsCoor().z + 20;
174        diff[1] = State::getCameraNode()->getAbsCoor().y;
175        fog_c = 1.3f*sqrt(diff[0]*diff[0]+diff[1]*diff[1]+diff[2]*diff[2]);
176        glFogCoordfEXT(fog_c*2);
177        glVertex3f(-20,0,i);
[7546]178
[8495]179        diff[0] = State::getCameraNode()->getAbsCoor().x - i;
180        diff[2] = State::getCameraNode()->getAbsCoor().z + 20;
181        diff[1] = State::getCameraNode()->getAbsCoor().y;
182        fog_c = 1.3f*sqrt(diff[0]*diff[0]+diff[1]*diff[1]+diff[2]*diff[2]);
183        glFogCoordfEXT(fog_c*2);
184        glVertex3f(20,0,i);
185    }
186    glEnd();
[7546]187
[8495]188    glPopAttrib();
[7546]189
[7557]190}
[7546]191
192
[7516]193/**
[7652]194* ticks the effect if there is any time dependancy
195*/
[8495]196void VolFogEffect::tick(float dt) {}
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