Moved low level "tg" format object loader code over to SimGear.
This commit is contained in:
curt
@@ -7,12 +7,14 @@ noinst_HEADERS =
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include_HEADERS = \
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include_HEADERS = \
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apt_signs.hxx \
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apt_signs.hxx \
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leaf.hxx \
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leaf.hxx \
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obj.hxx \
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pt_lights.hxx \
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pt_lights.hxx \
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userdata.hxx
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userdata.hxx
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libsgtgdb_a_SOURCES = \
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libsgtgdb_a_SOURCES = \
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apt_signs.cxx \
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apt_signs.cxx \
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leaf.cxx \
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leaf.cxx \
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obj.cxx \
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pt_lights.cxx \
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pt_lights.cxx \
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userdata.cxx
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userdata.cxx
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@@ -0,0 +1,470 @@
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// obj.cxx -- routines to handle loading scenery and building the plib
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// scene graph.
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//
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// Written by Curtis Olson, started October 1997.
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//
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// Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
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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 STL_STRING
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#include <simgear/bucket/newbucket.hxx>
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#include <simgear/io/sg_binobj.hxx>
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#include <simgear/math/sg_geodesy.hxx>
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#include <simgear/math/sg_types.hxx>
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#include <simgear/misc/texcoord.hxx>
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#include <simgear/scene/material/mat.hxx>
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#include <simgear/scene/material/matlib.hxx>
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#include <simgear/scene/tgdb/leaf.hxx>
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#include <simgear/scene/tgdb/pt_lights.hxx>
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#include <simgear/scene/tgdb/userdata.hxx>
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#include "obj.hxx"
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SG_USING_STD(string);
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// Generate an ocean tile
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bool fgGenTile( const string& path, SGBucket b,
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Point3D *center, double *bounding_radius,
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SGMaterialLib *matlib, ssgBranch* geometry )
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{
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ssgSimpleState *state = NULL;
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geometry->setName( (char *)path.c_str() );
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double tex_width = 1000.0;
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// double tex_height;
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// find Ocean material in the properties list
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SGMaterial *mat = matlib->find( "Ocean" );
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if ( mat != NULL ) {
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// set the texture width and height values for this
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// material
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tex_width = mat->get_xsize();
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// tex_height = newmat->get_ysize();
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// set ssgState
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state = mat->get_state();
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} else {
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SG_LOG( SG_TERRAIN, SG_ALERT,
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"Ack! unknown usemtl name = " << "Ocean"
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<< " in " << path );
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}
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// Calculate center point
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double clon = b.get_center_lon();
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double clat = b.get_center_lat();
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double height = b.get_height();
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double width = b.get_width();
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*center = sgGeodToCart( Point3D(clon*SGD_DEGREES_TO_RADIANS,
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clat*SGD_DEGREES_TO_RADIANS,
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0.0) );
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// cout << "center = " << center << endl;;
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// Caculate corner vertices
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Point3D geod[4];
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geod[0] = Point3D( clon - width/2.0, clat - height/2.0, 0.0 );
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geod[1] = Point3D( clon + width/2.0, clat - height/2.0, 0.0 );
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geod[2] = Point3D( clon + width/2.0, clat + height/2.0, 0.0 );
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geod[3] = Point3D( clon - width/2.0, clat + height/2.0, 0.0 );
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Point3D rad[4];
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int i;
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for ( i = 0; i < 4; ++i ) {
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rad[i] = Point3D( geod[i].x() * SGD_DEGREES_TO_RADIANS,
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geod[i].y() * SGD_DEGREES_TO_RADIANS,
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geod[i].z() );
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}
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Point3D cart[4], rel[4];
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for ( i = 0; i < 4; ++i ) {
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cart[i] = sgGeodToCart(rad[i]);
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rel[i] = cart[i] - *center;
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// cout << "corner " << i << " = " << cart[i] << endl;
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}
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// Calculate bounding radius
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*bounding_radius = center->distance3D( cart[0] );
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// cout << "bounding radius = " << t->bounding_radius << endl;
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// Calculate normals
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Point3D normals[4];
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for ( i = 0; i < 4; ++i ) {
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double length = cart[i].distance3D( Point3D(0.0) );
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normals[i] = cart[i] / length;
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// cout << "normal = " << normals[i] << endl;
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}
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// Calculate texture coordinates
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point_list geod_nodes;
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geod_nodes.clear();
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geod_nodes.reserve(4);
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int_list rectangle;
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rectangle.clear();
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rectangle.reserve(4);
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for ( i = 0; i < 4; ++i ) {
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geod_nodes.push_back( geod[i] );
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rectangle.push_back( i );
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}
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point_list texs = calc_tex_coords( b, geod_nodes, rectangle,
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1000.0 / tex_width );
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// Allocate ssg structure
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ssgVertexArray *vl = new ssgVertexArray( 4 );
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ssgNormalArray *nl = new ssgNormalArray( 4 );
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ssgTexCoordArray *tl = new ssgTexCoordArray( 4 );
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ssgColourArray *cl = new ssgColourArray( 1 );
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sgVec4 color;
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sgSetVec4( color, 1.0, 1.0, 1.0, 1.0 );
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cl->add( color );
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// sgVec3 *vtlist = new sgVec3 [ 4 ];
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// t->vec3_ptrs.push_back( vtlist );
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// sgVec3 *vnlist = new sgVec3 [ 4 ];
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// t->vec3_ptrs.push_back( vnlist );
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// sgVec2 *tclist = new sgVec2 [ 4 ];
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// t->vec2_ptrs.push_back( tclist );
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sgVec2 tmp2;
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sgVec3 tmp3;
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for ( i = 0; i < 4; ++i ) {
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sgSetVec3( tmp3,
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rel[i].x(), rel[i].y(), rel[i].z() );
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vl->add( tmp3 );
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sgSetVec3( tmp3,
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normals[i].x(), normals[i].y(), normals[i].z() );
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nl->add( tmp3 );
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sgSetVec2( tmp2, texs[i].x(), texs[i].y());
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tl->add( tmp2 );
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}
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ssgLeaf *leaf =
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new ssgVtxTable ( GL_TRIANGLE_FAN, vl, nl, tl, cl );
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leaf->setState( state );
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geometry->addKid( leaf );
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return true;
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}
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/**
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* SSG callback for an in-range leaf of randomly-placed objects.
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*
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* This pretraversal callback is attached to a branch that is
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* traversed only when a leaf is in range. If the leaf is not
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* currently prepared to be populated with randomly-placed objects,
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* this callback will prepare it (actual population is handled by
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* the tri_in_range_callback for individual triangles).
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*
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* @param entity The entity to which the callback is attached (not used).
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* @param mask The entity's traversal mask (not used).
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* @return Always 1, to allow traversal and culling to continue.
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*/
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static int
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leaf_in_range_callback (ssgEntity * entity, int mask)
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{
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sgLeafUserData * data = (sgLeafUserData *)entity->getUserData();
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if (!data->is_filled_in) {
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// Iterate through all the triangles
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// and populate them.
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int num_tris = data->leaf->getNumTriangles();
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for ( int i = 0; i < num_tris; ++i ) {
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data->setup_triangle(i);
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}
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data->is_filled_in = true;
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}
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return 1;
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}
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/**
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* SSG callback for an out-of-range leaf of randomly-placed objects.
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*
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* This pretraversal callback is attached to a branch that is
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* traversed only when a leaf is out of range. If the leaf is
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* currently prepared to be populated with randomly-placed objects (or
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* is actually populated), the objects will be removed.
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*
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* @param entity The entity to which the callback is attached (not used).
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* @param mask The entity's traversal mask (not used).
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* @return Always 0, to prevent any further traversal or culling.
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*/
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static int
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leaf_out_of_range_callback (ssgEntity * entity, int mask)
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{
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sgLeafUserData * data = (sgLeafUserData *)entity->getUserData();
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if (data->is_filled_in) {
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data->branch->removeAllKids();
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data->is_filled_in = false;
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}
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return 0;
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}
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/**
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* Randomly place objects on a surface.
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*
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* The leaf node provides the geometry of the surface, while the
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* material provides the objects and placement density. Latitude
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* and longitude are required so that the objects can be rotated
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* to the world-up vector. This function does not actually add
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* any objects; instead, it attaches an ssgRangeSelector to the
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* branch with callbacks to generate the objects when needed.
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*
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* @param leaf The surface where the objects should be placed.
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* @param branch The branch that will hold the randomly-placed objects.
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* @param center The center of the leaf in FlightGear coordinates.
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* @param material_name The name of the surface's material.
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*/
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static void
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gen_random_surface_objects (ssgLeaf *leaf,
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ssgBranch *branch,
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Point3D *center,
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SGMaterial *mat )
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{
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// If the surface has no triangles, return
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// now.
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int num_tris = leaf->getNumTriangles();
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if (num_tris < 1)
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return;
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// If the material has no randomly-placed
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// objects, return now.
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if (mat->get_object_group_count() < 1)
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return;
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// Calculate the geodetic centre of
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// the tile, for aligning automatic
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// objects.
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double lon_deg, lat_rad, lat_deg, alt_m, sl_radius_m;
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Point3D geoc = sgCartToPolar3d(*center);
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lon_deg = geoc.lon() * SGD_RADIANS_TO_DEGREES;
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sgGeocToGeod(geoc.lat(), geoc.radius(),
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&lat_rad, &alt_m, &sl_radius_m);
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lat_deg = lat_rad * SGD_RADIANS_TO_DEGREES;
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// LOD for the leaf
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// max random object range: 20000m
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float ranges[] = { 0, 20000, 1000000 };
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ssgRangeSelector * lod = new ssgRangeSelector;
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lod->setRanges(ranges, 3);
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branch->addKid(lod);
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// Create the in-range and out-of-range
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// branches.
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ssgBranch * in_range = new ssgBranch;
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ssgBranch * out_of_range = new ssgBranch;
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lod->addKid(in_range);
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lod->addKid(out_of_range);
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sgLeafUserData * data = new sgLeafUserData;
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data->is_filled_in = false;
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data->leaf = leaf;
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data->mat = mat;
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data->branch = in_range;
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data->sin_lat = sin(lat_deg * SGD_DEGREES_TO_RADIANS);
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data->cos_lat = cos(lat_deg * SGD_DEGREES_TO_RADIANS);
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data->sin_lon = sin(lon_deg * SGD_DEGREES_TO_RADIANS);
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data->cos_lon = cos(lon_deg * SGD_DEGREES_TO_RADIANS);
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in_range->setUserData(data);
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in_range->setTravCallback(SSG_CALLBACK_PRETRAV, leaf_in_range_callback);
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out_of_range->setUserData(data);
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out_of_range->setTravCallback(SSG_CALLBACK_PRETRAV,
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leaf_out_of_range_callback);
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out_of_range
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->addKid(new sgDummyBSphereEntity(leaf->getBSphere()->getRadius()));
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}
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////////////////////////////////////////////////////////////////////////
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||||||
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// Scenery loaders.
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||||||
|
////////////////////////////////////////////////////////////////////////
|
||||||
|
|
||||||
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// Load an Binary obj file
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bool fgBinObjLoad( const string& path, const bool is_base,
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Point3D *center,
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double *bounding_radius,
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SGMaterialLib *matlib,
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bool use_random_objects,
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ssgBranch* geometry,
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ssgBranch* rwy_lights,
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ssgBranch* taxi_lights,
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ssgVertexArray *ground_lights )
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||||||
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{
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||||||
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SGBinObject obj;
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if ( ! obj.read_bin( path ) ) {
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return false;
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}
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||||||
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geometry->setName( (char *)path.c_str() );
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// reference point (center offset/bounding sphere)
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*center = obj.get_gbs_center();
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*bounding_radius = obj.get_gbs_radius();
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||||||
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point_list const& nodes = obj.get_wgs84_nodes();
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// point_list const& colors = obj.get_colors();
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point_list const& normals = obj.get_normals();
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||||||
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point_list const& texcoords = obj.get_texcoords();
|
||||||
|
|
||||||
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string material;
|
||||||
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int_list tex_index;
|
||||||
|
|
||||||
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group_list::size_type i;
|
||||||
|
|
||||||
|
// generate points
|
||||||
|
string_list const& pt_materials = obj.get_pt_materials();
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||||||
|
group_list const& pts_v = obj.get_pts_v();
|
||||||
|
group_list const& pts_n = obj.get_pts_n();
|
||||||
|
for ( i = 0; i < pts_v.size(); ++i ) {
|
||||||
|
// cout << "pts_v.size() = " << pts_v.size() << endl;
|
||||||
|
if ( pt_materials[i].substr(0, 3) == "RWY" ) {
|
||||||
|
sgVec3 up;
|
||||||
|
sgSetVec3( up, center->x(), center->y(), center->z() );
|
||||||
|
// returns a transform -> lod -> leaf structure
|
||||||
|
ssgBranch *branch = sgMakeDirectionalLights( nodes, normals,
|
||||||
|
pts_v[i], pts_n[i],
|
||||||
|
matlib,
|
||||||
|
pt_materials[i], up );
|
||||||
|
if ( pt_materials[i].substr(0, 16) == "RWY_BLUE_TAXIWAY" ) {
|
||||||
|
taxi_lights->addKid( branch );
|
||||||
|
} else {
|
||||||
|
rwy_lights->addKid( branch );
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
material = pt_materials[i];
|
||||||
|
tex_index.clear();
|
||||||
|
ssgLeaf *leaf = sgMakeLeaf( path, GL_POINTS, matlib, material,
|
||||||
|
nodes, normals, texcoords,
|
||||||
|
pts_v[i], pts_n[i], tex_index,
|
||||||
|
false, ground_lights );
|
||||||
|
geometry->addKid( leaf );
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Put all randomly-placed objects under a separate branch
|
||||||
|
// (actually an ssgRangeSelector) named "random-models".
|
||||||
|
ssgBranch * random_object_branch = 0;
|
||||||
|
if (use_random_objects) {
|
||||||
|
float ranges[] = { 0, 20000 }; // Maximum 20km range for random objects
|
||||||
|
ssgRangeSelector * object_lod = new ssgRangeSelector;
|
||||||
|
object_lod->setRanges(ranges, 2);
|
||||||
|
object_lod->setName("random-models");
|
||||||
|
geometry->addKid(object_lod);
|
||||||
|
random_object_branch = new ssgBranch;
|
||||||
|
object_lod->addKid(random_object_branch);
|
||||||
|
}
|
||||||
|
|
||||||
|
// generate triangles
|
||||||
|
string_list const& tri_materials = obj.get_tri_materials();
|
||||||
|
group_list const& tris_v = obj.get_tris_v();
|
||||||
|
group_list const& tris_n = obj.get_tris_n();
|
||||||
|
group_list const& tris_tc = obj.get_tris_tc();
|
||||||
|
for ( i = 0; i < tris_v.size(); ++i ) {
|
||||||
|
ssgLeaf *leaf = sgMakeLeaf( path, GL_TRIANGLES, matlib,
|
||||||
|
tri_materials[i],
|
||||||
|
nodes, normals, texcoords,
|
||||||
|
tris_v[i], tris_n[i], tris_tc[i],
|
||||||
|
is_base, ground_lights );
|
||||||
|
|
||||||
|
if ( use_random_objects ) {
|
||||||
|
SGMaterial *mat = matlib->find( tri_materials[i] );
|
||||||
|
if ( mat == NULL ) {
|
||||||
|
SG_LOG( SG_INPUT, SG_ALERT,
|
||||||
|
"Unknown material for random surface objects = "
|
||||||
|
<< tri_materials[i] );
|
||||||
|
} else {
|
||||||
|
gen_random_surface_objects( leaf, random_object_branch,
|
||||||
|
center, mat );
|
||||||
|
}
|
||||||
|
}
|
||||||
|
geometry->addKid( leaf );
|
||||||
|
}
|
||||||
|
|
||||||
|
// generate strips
|
||||||
|
string_list const& strip_materials = obj.get_strip_materials();
|
||||||
|
group_list const& strips_v = obj.get_strips_v();
|
||||||
|
group_list const& strips_n = obj.get_strips_n();
|
||||||
|
group_list const& strips_tc = obj.get_strips_tc();
|
||||||
|
for ( i = 0; i < strips_v.size(); ++i ) {
|
||||||
|
ssgLeaf *leaf = sgMakeLeaf( path, GL_TRIANGLE_STRIP,
|
||||||
|
matlib, strip_materials[i],
|
||||||
|
nodes, normals, texcoords,
|
||||||
|
strips_v[i], strips_n[i], strips_tc[i],
|
||||||
|
is_base, ground_lights );
|
||||||
|
|
||||||
|
if ( use_random_objects ) {
|
||||||
|
SGMaterial *mat = matlib->find( strip_materials[i] );
|
||||||
|
if ( mat == NULL ) {
|
||||||
|
SG_LOG( SG_INPUT, SG_ALERT,
|
||||||
|
"Unknown material for random surface objects = "
|
||||||
|
<< strip_materials[i] );
|
||||||
|
} else {
|
||||||
|
gen_random_surface_objects( leaf, random_object_branch,
|
||||||
|
center, mat );
|
||||||
|
}
|
||||||
|
}
|
||||||
|
geometry->addKid( leaf );
|
||||||
|
}
|
||||||
|
|
||||||
|
// generate fans
|
||||||
|
string_list const& fan_materials = obj.get_fan_materials();
|
||||||
|
group_list const& fans_v = obj.get_fans_v();
|
||||||
|
group_list const& fans_n = obj.get_fans_n();
|
||||||
|
group_list const& fans_tc = obj.get_fans_tc();
|
||||||
|
for ( i = 0; i < fans_v.size(); ++i ) {
|
||||||
|
ssgLeaf *leaf = sgMakeLeaf( path, GL_TRIANGLE_FAN,
|
||||||
|
matlib, fan_materials[i],
|
||||||
|
nodes, normals, texcoords,
|
||||||
|
fans_v[i], fans_n[i], fans_tc[i],
|
||||||
|
is_base, ground_lights );
|
||||||
|
if ( use_random_objects ) {
|
||||||
|
SGMaterial *mat = matlib->find( fan_materials[i] );
|
||||||
|
if ( mat == NULL ) {
|
||||||
|
SG_LOG( SG_INPUT, SG_ALERT,
|
||||||
|
"Unknown material for random surface objects = "
|
||||||
|
<< fan_materials[i] );
|
||||||
|
} else {
|
||||||
|
gen_random_surface_objects( leaf, random_object_branch,
|
||||||
|
center, mat );
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
geometry->addKid( leaf );
|
||||||
|
}
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
@@ -0,0 +1,65 @@
|
|||||||
|
// obj.hxx -- routines to handle loading scenery and building the plib
|
||||||
|
// scene graph.
|
||||||
|
//
|
||||||
|
// Written by Curtis Olson, started October 1997.
|
||||||
|
//
|
||||||
|
// Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
|
||||||
|
//
|
||||||
|
// This program is free software; you can redistribute it and/or
|
||||||
|
// modify it under the terms of the GNU General Public License as
|
||||||
|
// published by the Free Software Foundation; either version 2 of the
|
||||||
|
// License, or (at your option) any later version.
|
||||||
|
//
|
||||||
|
// This program is distributed in the hope that it will be useful, but
|
||||||
|
// WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||||
|
// General Public License for more details.
|
||||||
|
//
|
||||||
|
// You should have received a copy of the GNU General Public License
|
||||||
|
// along with this program; if not, write to the Free Software
|
||||||
|
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||||
|
//
|
||||||
|
// $Id$
|
||||||
|
|
||||||
|
|
||||||
|
#ifndef _SG_OBJ_HXX
|
||||||
|
#define _SG_OBJ_HXX
|
||||||
|
|
||||||
|
|
||||||
|
#ifndef __cplusplus
|
||||||
|
# error This library requires C++
|
||||||
|
#endif
|
||||||
|
|
||||||
|
|
||||||
|
#include <simgear/compiler.h>
|
||||||
|
|
||||||
|
#include STL_STRING
|
||||||
|
|
||||||
|
#include <plib/ssg.h> // plib include
|
||||||
|
|
||||||
|
#include <simgear/math/point3d.hxx>
|
||||||
|
|
||||||
|
SG_USING_STD(string);
|
||||||
|
|
||||||
|
class SGBucket;
|
||||||
|
class SGMaterialLib;
|
||||||
|
|
||||||
|
|
||||||
|
// Load a Binary obj file
|
||||||
|
bool sgBinObjLoad( const string& path, const bool is_base,
|
||||||
|
Point3D *center,
|
||||||
|
double *bounding_radius,
|
||||||
|
SGMaterialLib *matlib,
|
||||||
|
bool use_random_objects,
|
||||||
|
ssgBranch* geometry,
|
||||||
|
ssgBranch* rwy_lights,
|
||||||
|
ssgBranch* taxi_lights,
|
||||||
|
ssgVertexArray *ground_lights );
|
||||||
|
|
||||||
|
// Generate an ocean tile
|
||||||
|
bool sgGenTile( const string& path, SGBucket b,
|
||||||
|
Point3D *center, double *bounding_radius,
|
||||||
|
SGMaterialLib *matlib, ssgBranch* geometry );
|
||||||
|
|
||||||
|
|
||||||
|
#endif // _SG_OBJ_HXX
|
||||||
Reference in New Issue
Block a user