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/* -*- mia-c++ -*-
*
* This file is part of viewitgui - a library and program for the
* visualization of 3D data sets.
*
* Copyright (c) Leipzig, Madrid 1999-2013 Mirco Hellmann, Gert Wollny
*
* viewitgui 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 3 of the License, or
* (at your option) any later version.
*
* viewitgui 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 viewitgui; if not, see <http://www.gnu.org/licenses/>.
*/
#include <viewit/light.hh>
#include <GL/gl.h>
#include <cassert>
#include <iostream>
class TData {
friend class TLight;
C3DFVector pos;
int no;
bool down_state;
C2DFVector m_loc;
TData(const C3DFVector& pos_, int no_);
};
TData::TData(const C3DFVector& pos_, int no_):
pos(pos_),
no(no_),
down_state(false)
{
// every GL impl. has 8 lights
assert(no < 8);
}
TLight::TLight(const C3DFVector& pos, const TColor& color,int no):
TDrawable(string("Light_") + string(1, char('0'+no))),
data(new TData(pos,no))
{
set_color1(color);
show();
}
TLight::~TLight()
{
delete data;
}
void TLight::gl_use() const
{
GLenum lightnum = GLenum(GL_LIGHT0 + data->no);
glLightfv(lightnum,GL_DIFFUSE,&get_color1().x);
const GLfloat specular[]= {0.1f,0.1f,0.1f,1.0f};
glLightfv(lightnum, GL_SPECULAR, specular );
pre_transformation();
glLightfv(lightnum,GL_POSITION,&data->pos.x);
end_transformation();
}
void TLight::on()const
{
glEnable(GLenum(GL_LIGHT0 + data->no));
}
void TLight::off()const
{
glDisable(GLenum(GL_LIGHT0 + data->no));
}
void TLight::do_gl_draw(const TCamera& c) const
{
// light is not visible if not selected
if (! is_selected())
return;
#if 0
//draw something
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
pre_transformation();
glBegin(GL_LINES);
glColor3fv(&get_color1().x);
glVertex3f(data->pos.x - 2.0f, data->pos.y , data->pos.z );
glVertex3f(data->pos.x + 2.0f, data->pos.y , data->pos.z );
glVertex3f(data->pos.x , data->pos.y - 2.0f, data->pos.z );
glVertex3f(data->pos.x , data->pos.y + 2.0f, data->pos.z );
glVertex3f(data->pos.x , data->pos.y , data->pos.z - 2.0f);
glVertex3f(data->pos.x , data->pos.y , data->pos.z + 2.0f);
glEnd();
glPopMatrix();
#endif
}
bool TLight::do_handle_key_event(int key)
{
switch (key) {
case 't':
case 'v':break;
case 's':if (data->down_state) break;
default:
return TDrawable::do_handle_key_event(key);
}
return true;
}
bool TLight::do_handle_mouse_event(int button,int x, int y)
{
if (button & EV_MOUSE2_DOWN) {
data->down_state = true;
} else if (button & EV_MOUSE_MOVE && data->down_state) {
add_rotation(C3DFVector(y - data->m_loc.y,
x - data->m_loc.x,
0.0f));
} else if (button & EV_MOUSE2_UP && data->down_state) {
data->down_state = false;
} else {
return false;
}
data->m_loc.x = x;
data->m_loc.y = y;
return true;
}
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