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* Copyright (C) 2002 Fabien Chereau
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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
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#include "s_texture.h"
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#include "stel_utility.h"
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// rms added color as parameter
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SkyGrid::SkyGrid(SKY_GRID_TYPE grid_type, unsigned int _nb_meridian, unsigned int _nb_parallel, double _radius,
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unsigned int _nb_alt_segment, unsigned int _nb_azi_segment) :
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nb_meridian(_nb_meridian), nb_parallel(_nb_parallel), radius(_radius),
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nb_alt_segment(_nb_alt_segment), nb_azi_segment(_nb_azi_segment), color(0.2,0.2,0.2)
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transparent_top = true;
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case ALTAZIMUTAL : proj_func = &Projector::project_local; break;
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case EQUATORIAL : proj_func = &Projector::project_earth_equ; break;
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default : proj_func = &Projector::project_earth_equ;
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// Alt points are the points to draw along the meridian
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alt_points = new Vec3f*[nb_meridian];
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for (unsigned int nm=0;nm<nb_meridian;++nm)
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alt_points[nm] = new Vec3f[nb_alt_segment+1];
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for (unsigned int i=0;i<nb_alt_segment+1;++i)
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sphe_to_rect((float)nm/(nb_meridian)*2.f*M_PI,
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(float)i/nb_alt_segment*M_PI-M_PI_2, alt_points[nm][i]);
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alt_points[nm][i] *= radius;
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// Alt points are the points to draw along the meridian
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azi_points = new Vec3f*[nb_parallel];
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for (unsigned int np=0;np<nb_parallel;++np)
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azi_points[np] = new Vec3f[nb_azi_segment+1];
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for (unsigned int i=0;i<nb_azi_segment+1;++i)
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sphe_to_rect((float)i/(nb_azi_segment)*2.f*M_PI,
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(float)(np+1)/(nb_parallel+1)*M_PI-M_PI_2, azi_points[np][i]);
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azi_points[np][i] *= radius;
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for (unsigned int nm=0;nm<nb_meridian;++nm)
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delete [] alt_points[nm];
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for (unsigned int np=0;np<nb_parallel;++np)
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delete [] azi_points[np];
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if (font) delete font;
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void SkyGrid::set_font(float font_size, const string& font_name)
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font = new s_font(font_size, font_name);
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void SkyGrid::draw(const Projector* prj) const
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if (!fader.getInterstate()) return;
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glDisable(GL_TEXTURE_2D);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // Normal transparency mode
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prj->set_orthographic_projection(); // set 2D coordinate
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for (unsigned int nm=0;nm<nb_meridian;++nm)
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if (transparent_top) // Transparency for the first and last points
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if ((prj->*proj_func)(alt_points[nm][0], pt1) &&
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(prj->*proj_func)(alt_points[nm][1], pt2) )
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const double dx = pt1[0]-pt2[0];
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const double dy = pt1[1]-pt2[1];
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const double dq = dx*dx+dy*dy;
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if (dq < 1024*1024) {
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glColor4f(color[0],color[1],color[2],0.f);
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glVertex2f(pt1[0],pt1[1]);
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glColor4f(color[0],color[1],color[2],fader.getInterstate());
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glVertex2f(pt2[0],pt2[1]);
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glColor4f(color[0],color[1],color[2],fader.getInterstate());
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for (unsigned int i=1;i<nb_alt_segment-1;++i)
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if ((prj->*proj_func)(alt_points[nm][i], pt1) &&
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(prj->*proj_func)(alt_points[nm][i+1], pt2) )
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const double dx = pt1[0]-pt2[0];
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const double dy = pt1[1]-pt2[1];
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const double dq = dx*dx+dy*dy;
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if (dq < 1024*1024) {
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glVertex2f(pt1[0],pt1[1]);
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glVertex2f(pt2[0],pt2[1]);
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static char str[255]; // TODO use c++ string
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glEnable(GL_TEXTURE_2D);
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// TODO: allow for other numbers of meridians and parallels without
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// screwing up labels?
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if( gtype == EQUATORIAL && i == 8 ) {
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// draw labels along equator for RA
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const double d = sqrt(dq);
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angle = acos((pt1[1]-pt2[1])/d);
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if( pt1[0] < pt2[0] ) {
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sprintf( str, "%dh", nm);
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prj->set_orthographic_projection();
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glTranslatef(pt2[0],pt2[1],0);
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glRotatef(90+angle*180./M_PI,0,0,-1);
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font->print(2,-2,str);
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prj->reset_perspective_projection();
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} else if (nm % 8 == 0 && i != 16) {
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const double d = sqrt(dq);
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angle = acos((pt1[1]-pt2[1])/d);
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if( pt1[0] < pt2[0] ) {
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sprintf( str, "%d", (i-8)*10);
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if( gtype == ALTAZIMUTAL ||
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(gtype == EQUATORIAL && i > 8)) {
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prj->set_orthographic_projection();
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glTranslatef(pt2[0],pt2[1],0);
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glRotatef(angle*180./M_PI,0,0,-1);
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font->print(2,-2,str);
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prj->reset_perspective_projection();
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glDisable(GL_TEXTURE_2D);
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if ((prj->*proj_func)(alt_points[nm][nb_alt_segment-1], pt1) &&
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(prj->*proj_func)(alt_points[nm][nb_alt_segment], pt2) )
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const double dx = pt1[0]-pt2[0];
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const double dy = pt1[1]-pt2[1];
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const double dq = dx*dx+dy*dy;
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if (dq < 1024*1024) {
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glColor4f(color[0],color[1],color[2],fader.getInterstate());
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glVertex2f(pt1[0],pt1[1]);
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glColor4f(color[0],color[1],color[2],0.f);
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glVertex2f(pt2[0],pt2[1]);
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glColor4f(color[0],color[1],color[2],fader.getInterstate());
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for (unsigned int i=0;i<nb_alt_segment;++i)
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if ((prj->*proj_func)(alt_points[nm][i], pt1) &&
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(prj->*proj_func)(alt_points[nm][i+1], pt2) )
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const double dx = pt1[0]-pt2[0];
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const double dy = pt1[1]-pt2[1];
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const double dq = dx*dx+dy*dy;
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if (dq < 1024*1024) {
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glVertex2f(pt1[0],pt1[1]);
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glVertex2f(pt2[0],pt2[1]);
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glColor4f(color[0],color[1],color[2],fader.getInterstate());
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for (unsigned int np=0;np<nb_parallel;++np)
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for (unsigned int i=0;i<nb_azi_segment;++i)
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if ((prj->*proj_func)(azi_points[np][i], pt1) &&
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(prj->*proj_func)(azi_points[np][i+1], pt2) )
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const double dx = pt1[0]-pt2[0];
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const double dy = pt1[1]-pt2[1];
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const double dq = dx*dx+dy*dy;
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if (dq < 1024*1024) {
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glVertex2f(pt1[0],pt1[1]);
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glVertex2f(pt2[0],pt2[1]);
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prj->reset_perspective_projection();
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SkyLine::SkyLine(SKY_LINE_TYPE _line_type, double _radius, unsigned int _nb_segment) :
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radius(_radius), nb_segment(_nb_segment), color(0.f, 0.f, 1.f), font(NULL)
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float inclinaison = 0.f;
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line_type = _line_type;
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case LOCAL : proj_func = &Projector::project_local; break;
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case MERIDIAN : proj_func = &Projector::project_local;
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inclinaison = 90; break;
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case ECLIPTIC : proj_func = &Projector::project_j2000;
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inclinaison = 23.4392803055555555556; break;
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case EQUATOR : proj_func = &Projector::project_earth_equ; break;
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default : proj_func = &Projector::project_earth_equ;
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Mat4f r = Mat4f::xrotation(inclinaison*M_PI/180.f);
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// Ecliptic month labels need to be redone
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// correct for month labels
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// TODO: can make this more accurate
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// if(line_type == ECLIPTIC ) r = r * Mat4f::zrotation(-77.9*M_PI/180.);
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// Points to draw along the circle
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points = new Vec3f[nb_segment+1];
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for (unsigned int i=0;i<nb_segment+1;++i)
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sphe_to_rect((float)i/(nb_segment)*2.f*M_PI, 0.f, points[i]);
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points[i].transfo4d(r);
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if (font) delete font;
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void SkyLine::set_font(float font_size, const string& font_name)
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if (font) delete font;
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font = new s_font(font_size, font_name);
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void SkyLine::draw(const Projector* prj) const
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if (!fader.getInterstate()) return;
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glColor4f(color[0], color[1], color[2], fader.getInterstate());
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glDisable(GL_TEXTURE_2D);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // Normal transparency mode
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prj->set_orthographic_projection(); // set 2D coordinate
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for (unsigned int i=0;i<nb_segment;++i)
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if ((prj->*proj_func)(points[i], pt1) &&
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(prj->*proj_func)(points[i+1], pt2) )
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const double dx = pt1[0]-pt2[0];
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const double dy = pt1[1]-pt2[1];
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const double dq = dx*dx+dy*dy;
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if (dq < 1024*1024) {
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// TODO: allow for other numbers of meridians and parallels without
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// screwing up labels?
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glVertex2f(pt1[0],pt1[1]);
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glVertex2f(pt2[0],pt2[1]);
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if(line_type == MERIDIAN) {
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const double d = sqrt(dq);
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angle = acos((pt1[1]-pt2[1])/d);
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if( pt1[0] < pt2[0] ) {
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std::ostringstream oss;
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if(i<=8) oss << (i+1)*10;
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glTranslatef(pt2[0],pt2[1],0);
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glRotatef(180+angle*180./M_PI,0,0,-1);
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glEnable(GL_TEXTURE_2D);
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if(font) font->print(2,-2,oss.str());
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glDisable(GL_TEXTURE_2D);
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if(line_type == EQUATOR && (i+1) % 2 == 0) {
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const double d = sqrt(dq);
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angle = acos((pt1[1]-pt2[1])/d);
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if( pt1[0] < pt2[0] ) {
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std::ostringstream oss;
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if((i+1)/2 == 24) oss << "0h";
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else oss << (i+1)/2 << "h";
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glTranslatef(pt2[0],pt2[1],0);
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glRotatef(180+angle*180./M_PI,0,0,-1);
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glEnable(GL_TEXTURE_2D);
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if(font) font->print(2,-2,oss.str());
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glDisable(GL_TEXTURE_2D);
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// Draw months on ecliptic
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if(line_type == ECLIPTIC && (i+3) % 4 == 0) {
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const double d = sqrt(dq);
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angle = acos((pt1[1]-pt2[1])/d);
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if( pt1[0] < pt2[0] ) {
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std::ostringstream oss;
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glTranslatef(pt2[0],pt2[1],0);
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glRotatef(-90+angle*180./M_PI,0,0,-1);
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glEnable(GL_TEXTURE_2D);
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if(font) font->print(0,-2,oss.str());
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glDisable(GL_TEXTURE_2D);
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prj->reset_perspective_projection();
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Cardinals::Cardinals(float _radius) : radius(_radius), font(NULL), color(0.6,0.2,0.2)
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// Default labels - if sky locale specified, loaded later
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// Improvement for gettext translation
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Cardinals::~Cardinals()
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if (font) delete font;
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* Set the font for cardinal points
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* @param font_size size in pixel
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* @param font_name name of the font
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void Cardinals::set_font(float font_size, const string& font_name)
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font = new s_font(font_size, font_name);
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// Draw the cardinals points : N S E W
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// handles special cases at poles
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void Cardinals::draw(const Projector* prj, double latitude, bool gravityON) const
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if (!fader.getInterstate()) return;
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// fun polar special cases
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if(latitude == 90.0 ) d[0] = d[1] = d[2] = d[3] = sSouth;
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if(latitude == -90.0 ) d[0] = d[1] = d[2] = d[3] = sNorth;
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glColor4f(color[0],color[1],color[2],fader.getInterstate());
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glEnable(GL_TEXTURE_2D);
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// Normal transparency mode
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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prj->set_orthographic_projection();
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float shift = font->getStrLen(sNorth)/2;
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if (prj->getFlagGravityLabels())
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pos.set(-1.f, 0.f, 0.22f);
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if (prj->project_local(pos,xy)) prj->print_gravity180(font, xy[0], xy[1], d[0], -shift, -shift);
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pos.set(1.f, 0.f, 0.22f);
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if (prj->project_local(pos,xy)) prj->print_gravity180(font, xy[0], xy[1], d[1], -shift, -shift);
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pos.set(0.f, 1.f, 0.22f);
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if (prj->project_local(pos,xy)) prj->print_gravity180(font, xy[0], xy[1], d[2], -shift, -shift);
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pos.set(0.f, -1.f, 0.22f);
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if (prj->project_local(pos,xy)) prj->print_gravity180(font, xy[0], xy[1], d[3], -shift, -shift);
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pos.set(-1.f, 0.f, 0.f);
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if (prj->project_local(pos,xy)) font->print(xy[0]-shift, xy[1]-shift, d[0]);
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pos.set(1.f, 0.f, 0.f);
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if (prj->project_local(pos,xy)) font->print(xy[0]-shift, xy[1]-shift, d[1]);
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pos.set(0.f, 1.f, 0.f);
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if (prj->project_local(pos,xy)) font->print(xy[0]-shift, xy[1]-shift, d[2]);
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pos.set(0.f, -1.f, 0.f);
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if (prj->project_local(pos,xy)) font->print(xy[0]-shift, xy[1]-shift, d[3]);
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prj->reset_perspective_projection();
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// Translate cardinal labels with gettext to current sky language
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void Cardinals::translateLabels(Translator& trans)
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sNorth = trans.translate("N");
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sSouth = trans.translate("S");
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sEast = trans.translate("E");
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sWest = trans.translate("W");
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// Class which manages the displaying of the Milky Way
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MilkyWay::MilkyWay(float _radius) : radius(_radius), color(1.f, 1.f, 1.f)
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MilkyWay::~MilkyWay()
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void MilkyWay::set_texture(const string& tex_file, bool blend)
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tex = new s_texture(tex_file,!blend ? TEX_LOAD_TYPE_PNG_SOLID_REPEAT : TEX_LOAD_TYPE_PNG_BLEND3);
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// big performance improvement to cache this
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tex_avg_luminance = tex->get_average_luminance();
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void MilkyWay::set_intensity(float _intensity)
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intensity = _intensity;
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void MilkyWay::draw(ToneReproductor * eye, const Projector* prj, const Navigator* nav) const
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assert(tex); // A texture must be loaded before calling this
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// Scotopic color = 0.25, 0.25 in xyY mode. Global stars luminance ~= 0.001 cd/m^2
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Vec3f c = Vec3f(0.25f*fader.getInterstate(), 0.25f*fader.getInterstate(),
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intensity*0.002f*fader.getInterstate()/tex_avg_luminance);
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glEnable(GL_CULL_FACE);
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glEnable(GL_TEXTURE_2D);
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glBindTexture(GL_TEXTURE_2D, tex->getID());
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prj->sSphere(radius,1.0,20,20,
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nav->get_j2000_to_eye_mat()*
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Mat4d::xrotation(M_PI/180*23)*
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Mat4d::yrotation(M_PI/180*120)*
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Mat4d::zrotation(M_PI/180*7), 1);
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glDisable(GL_CULL_FACE);
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void MilkyWay::draw_chart(ToneReproductor * eye, const Projector* prj, const Navigator* nav)
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assert(tex); // A texture must be loaded before calling this
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glEnable(GL_CULL_FACE);
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glEnable(GL_TEXTURE_2D);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glBindTexture(GL_TEXTURE_2D, tex->getID());
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prj->sSphere(radius,1.0,20,20,
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nav->get_j2000_to_eye_mat()*
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Mat4d::xrotation(M_PI/180*23)*
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Mat4d::yrotation(M_PI/180*120)*
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Mat4d::zrotation(M_PI/180*7), 1);
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glDisable(GL_CULL_FACE);
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// Draw a point... (used for tests)
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void Draw::drawPoint(float X,float Y,float Z)
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glColor3f(0.8, 1.0, 0.8);
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glDisable(GL_TEXTURE_2D);
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//glEnable(GL_BLEND);
added
removed
src/draw.cpp
