420 lines
11 KiB
C++
420 lines
11 KiB
C++
// newmat.cxx -- class to handle material properties
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//
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// Written by Curtis Olson, started May 1998.
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//
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// Copyright (C) 1998 - 2000 Curtis L. Olson - curt@flightgear.org
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <simgear/compiler.h>
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#include <map>
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SG_USING_STD(map);
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#include <simgear/compiler.h>
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#ifdef SG_MATH_EXCEPTION_CLASH
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# include <math.h>
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#endif
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#include <simgear/debug/logstream.hxx>
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#include <simgear/misc/sg_path.hxx>
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#include <simgear/misc/sgstream.hxx>
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#include <Main/globals.hxx>
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#include <Main/fg_props.hxx>
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#include "newmat.hxx"
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////////////////////////////////////////////////////////////////////////
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// Local static variables.
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// FIXME: write a proper manager.
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////////////////////////////////////////////////////////////////////////
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// Objects already loaded (that can be reused).
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map<string,ssgEntity *> object_map;
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////////////////////////////////////////////////////////////////////////
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// Local static functions.
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////////////////////////////////////////////////////////////////////////
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// FIXME: this is totally evil and non-robust: it assumes that
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// entities will never be refcounted to 0 (which is safe for now).
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static ssgEntity *
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load_object (char * path)
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{
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ssgEntity * object = object_map[path];
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if (object == 0) {
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object = ssgLoad(path);
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object_map[path] = object;
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}
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return object;
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}
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/**
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* Internal method to test whether a file exists.
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*
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* TODO: this should be moved to a SimGear library of local file
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* functions.
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*/
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static inline bool
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local_file_exists( const string& path ) {
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sg_gzifstream in( path );
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if ( ! in.is_open() ) {
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return false;
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} else {
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return true;
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}
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}
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////////////////////////////////////////////////////////////////////////
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// Implementation of FGNewMat::Object.
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////////////////////////////////////////////////////////////////////////
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FGNewMat::Object::Object (const SGPropertyNode * node)
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: _path(node->getStringValue("path")),
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_model(0),
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_coverage_m2(node->getDoubleValue("coverage-m2", 100000)),
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_range_m(node->getDoubleValue("range-m", 2000))
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{
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string hdg = node->getStringValue("heading-type", "fixed");
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if (hdg == "fixed") {
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_heading_type = HEADING_FIXED;
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} else if (hdg == "billboard") {
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_heading_type = HEADING_BILLBOARD;
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} else if (hdg == "random") {
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_heading_type = HEADING_RANDOM;
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} else {
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_heading_type = HEADING_FIXED;
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SG_LOG(SG_INPUT, SG_ALERT, "Unknown heading type: " << hdg
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<< "; using 'fixed' instead.");
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}
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}
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FGNewMat::Object::~Object ()
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{
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_model->deRef();
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}
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const string &
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FGNewMat::Object::get_path () const
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{
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return _path;
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}
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ssgEntity *
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FGNewMat::Object::get_model () const
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{
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// Load model only on demand
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if (_model == 0) {
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SGPath path = globals->get_fg_root();
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path.append(_path);
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ssgTexturePath((char *)path.dir().c_str());
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ssgEntity * entity = load_object((char *)path.c_str());
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if (entity != 0) {
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float ranges[] = {0, _range_m};
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_model = new ssgRangeSelector;
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((ssgRangeSelector *)_model)->setRanges(ranges, 2);
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if (_heading_type == HEADING_BILLBOARD) {
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ssgCutout * cutout = new ssgCutout(false);
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cutout->addKid(entity);
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((ssgBranch *)_model)->addKid(cutout);
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} else {
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((ssgBranch *)_model)->addKid(entity);
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}
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_model->ref();
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} else {
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SG_LOG(SG_INPUT, SG_ALERT, "Failed to load object " << path.str());
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}
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}
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return _model;
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}
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double
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FGNewMat::Object::get_coverage_m2 () const
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{
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return _coverage_m2;
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}
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double
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FGNewMat::Object::get_range_m () const
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{
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return _range_m;
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}
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////////////////////////////////////////////////////////////////////////
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// Constructors and destructor.
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////////////////////////////////////////////////////////////////////////
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FGNewMat::FGNewMat (const SGPropertyNode * props)
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{
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init();
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read_properties(props);
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build_ssg_state(false);
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}
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FGNewMat::FGNewMat (const string &texpath)
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{
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init();
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texture_path = texpath;
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build_ssg_state(true);
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}
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FGNewMat::FGNewMat (ssgSimpleState * s)
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{
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init();
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set_ssg_state(s);
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}
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FGNewMat::~FGNewMat (void)
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{
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for (unsigned int i = 0; i < objects.size(); i++) {
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delete objects[i];
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objects[i] = 0;
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}
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}
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////////////////////////////////////////////////////////////////////////
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// Public methods.
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////////////////////////////////////////////////////////////////////////
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void
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FGNewMat::read_properties (const SGPropertyNode * props)
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{
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// Get the path to the texture
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string tname = props->getStringValue("texture", "unknown.rgb");
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SGPath tpath(globals->get_fg_root());
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tpath.append("Textures.high");
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tpath.append(tname);
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if (!local_file_exists(tpath.str())) {
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tpath = SGPath(globals->get_fg_root());
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tpath.append("Textures");
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tpath.append(tname);
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}
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texture_path = tpath.str();
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xsize = props->getDoubleValue("xsize", 0.0);
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ysize = props->getDoubleValue("ysize", 0.0);
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wrapu = props->getBoolValue("wrapu", true);
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wrapv = props->getBoolValue("wrapv", true);
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mipmap = props->getBoolValue("mipmap", true);
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light_coverage = props->getDoubleValue("light-coverage", 0.0);
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ambient[0] = props->getDoubleValue("ambient/r", 0.0);
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ambient[1] = props->getDoubleValue("ambient/g", 0.0);
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ambient[2] = props->getDoubleValue("ambient/b", 0.0);
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ambient[3] = props->getDoubleValue("ambient/a", 0.0);
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diffuse[0] = props->getDoubleValue("diffuse/r", 0.0);
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diffuse[1] = props->getDoubleValue("diffuse/g", 0.0);
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diffuse[2] = props->getDoubleValue("diffuse/b", 0.0);
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diffuse[3] = props->getDoubleValue("diffuse/a", 0.0);
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specular[0] = props->getDoubleValue("specular/r", 0.0);
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specular[1] = props->getDoubleValue("specular/g", 0.0);
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specular[2] = props->getDoubleValue("specular/b", 0.0);
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specular[3] = props->getDoubleValue("specular/a", 0.0);
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emission[0] = props->getDoubleValue("emissive/r", 0.0);
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emission[1] = props->getDoubleValue("emissive/g", 0.0);
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emission[2] = props->getDoubleValue("emissive/b", 0.0);
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emission[3] = props->getDoubleValue("emissive/a", 0.0);
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vector<SGPropertyNode_ptr> object_nodes =
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((SGPropertyNode *)props)->getChildren("object");
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for (unsigned int i = 0; i < object_nodes.size(); i++) {
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const SGPropertyNode * object_node = object_nodes[i];
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if (object_node->hasChild("path"))
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objects.push_back(new Object(object_node));
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else
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SG_LOG(SG_INPUT, SG_ALERT, "No path supplied for object");
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}
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}
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////////////////////////////////////////////////////////////////////////
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// Private methods.
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////////////////////////////////////////////////////////////////////////
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void
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FGNewMat::init ()
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{
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texture_path = "";
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state = 0;
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textured = 0;
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nontextured = 0;
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xsize = 0;
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ysize = 0;
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wrapu = true;
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wrapv = true;
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mipmap = true;
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light_coverage = 0.0;
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texture_loaded = false;
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refcount = 0;
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for (int i = 0; i < 4; i++)
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ambient[i] = diffuse[i] = specular[i] = emission[i] = 0.0;
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}
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bool
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FGNewMat::load_texture ()
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{
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if (texture_loaded) {
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return false;
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} else {
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SG_LOG( SG_GENERAL, SG_INFO, "Loading deferred texture " << texture_path );
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textured->setTexture((char *)texture_path.c_str(), wrapu, wrapv, mipmap );
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texture_loaded = true;
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return true;
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}
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}
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void
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FGNewMat::build_ssg_state (bool defer_tex_load)
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{
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GLenum shade_model =
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(fgGetBool("/sim/rendering/shading") ? GL_SMOOTH : GL_FLAT);
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bool texture_default = fgGetBool("/sim/rendering/textures");
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state = new ssgStateSelector(2);
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state->ref();
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textured = new ssgSimpleState();
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textured->ref();
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nontextured = new ssgSimpleState();
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nontextured->ref();
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// Set up the textured state
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textured->setShadeModel( shade_model );
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textured->enable( GL_LIGHTING );
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textured->enable ( GL_CULL_FACE ) ;
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textured->enable( GL_TEXTURE_2D );
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textured->disable( GL_BLEND );
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textured->disable( GL_ALPHA_TEST );
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#if 0
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# ifdef GL_EXT_texture_filter_anisotropic
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float max_anisotropy;
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glGetFloatv( GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &max_anisotropy );
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glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT,
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max_anisotropy );
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cout << "Max anisotropy = " << max_anisotropy << endl;
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# endif
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#endif
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if ( !defer_tex_load ) {
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textured->setTexture( (char *)texture_path.c_str(), wrapu, wrapv );
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texture_loaded = true;
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} else {
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texture_loaded = false;
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}
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textured->enable( GL_COLOR_MATERIAL );
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textured->setColourMaterial( GL_AMBIENT_AND_DIFFUSE );
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textured->setMaterial( GL_EMISSION, 0, 0, 0, 1 );
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textured->setMaterial( GL_SPECULAR, 0, 0, 0, 1 );
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// Set up the coloured state
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nontextured->enable( GL_LIGHTING );
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nontextured->setShadeModel( shade_model );
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nontextured->enable ( GL_CULL_FACE ) ;
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nontextured->disable( GL_TEXTURE_2D );
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nontextured->disable( GL_BLEND );
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nontextured->disable( GL_ALPHA_TEST );
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nontextured->disable( GL_COLOR_MATERIAL );
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nontextured->setMaterial ( GL_AMBIENT,
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ambient[0], ambient[1],
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ambient[2], ambient[3] ) ;
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nontextured->setMaterial ( GL_DIFFUSE,
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diffuse[0], diffuse[1],
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diffuse[2], diffuse[3] ) ;
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nontextured->setMaterial ( GL_SPECULAR,
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specular[0], specular[1],
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specular[2], specular[3] ) ;
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nontextured->setMaterial ( GL_EMISSION,
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emission[0], emission[1],
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emission[2], emission[3] ) ;
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state->setStep( 0, textured ); // textured
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state->setStep( 1, nontextured ); // untextured
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// Choose the appropriate starting state.
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if ( texture_default ) {
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state->selectStep(0);
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} else {
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state->selectStep(1);
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}
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}
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void FGNewMat::set_ssg_state( ssgSimpleState *s )
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{
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state = new ssgStateSelector(2);
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state->ref();
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textured = s;
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nontextured = new ssgSimpleState();
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nontextured->ref();
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// Set up the coloured state
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nontextured->enable( GL_LIGHTING );
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nontextured->setShadeModel( GL_FLAT );
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nontextured->enable ( GL_CULL_FACE ) ;
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nontextured->disable( GL_TEXTURE_2D );
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nontextured->disable( GL_BLEND );
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nontextured->disable( GL_ALPHA_TEST );
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nontextured->disable( GL_COLOR_MATERIAL );
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/* cout << "ambient = " << ambient[0] << "," << ambient[1]
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<< "," << ambient[2] << endl; */
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nontextured->setMaterial ( GL_AMBIENT,
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ambient[0], ambient[1],
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ambient[2], ambient[3] ) ;
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nontextured->setMaterial ( GL_DIFFUSE,
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diffuse[0], diffuse[1],
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diffuse[2], diffuse[3] ) ;
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nontextured->setMaterial ( GL_SPECULAR,
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specular[0], specular[1],
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specular[2], specular[3] ) ;
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nontextured->setMaterial ( GL_EMISSION,
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emission[0], emission[1],
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emission[2], emission[3] ) ;
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state->setStep( 0, textured ); // textured
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state->setStep( 1, nontextured ); // untextured
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// Choose the appropriate starting state.
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state->selectStep(0);
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}
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// end of newmat.cxx
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