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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include "titanic/star_control/constellations.h"
#include "titanic/star_control/camera.h"
#include "titanic/star_control/star_field.h"
#include "titanic/star_control/surface_area.h"
#include "titanic/support/files_manager.h"
#include "titanic/titanic.h"
#include "math/utils.h"
namespace Titanic {
#define TOTAL_CONSTELLATIONS 80
bool CConstellations::initialize() {
double ra, dec, phi, theta;
// Get a reference to the starfield points resource
Common::SeekableReadStream *stream = g_vm->_filesManager->getResource("STARFIELD/POINTS2");
_data.resize(TOTAL_CONSTELLATIONS);
for (int rootCtr = 0; rootCtr < TOTAL_CONSTELLATIONS; ++rootCtr) {
// Get the number of points in the constellation
int count = stream->readUint32LE();
// Read in the points
Constellation &rootEntry = _data[rootCtr];
rootEntry.resize(count);
for (int idx = 0; idx < count; ++idx) {
ConstellationLine &cl = rootEntry[idx];
FVector *vectors[2] = { &cl._start, &cl._end};
for (int fctr = 0; fctr < 2; ++fctr) {
ra = (double)stream->readSint32LE() * 360.0f / 24000.0f;
dec = (double)stream->readSint32LE() / 100.0f;
// Work the polar coordinates
phi = Math::deg2rad<double>(ra);
theta = Math::deg2rad<double>(dec);
vectors[fctr]->_x = UNIVERSE_SCALE * cos(theta) * cos(phi);
vectors[fctr]->_y = UNIVERSE_SCALE * cos(theta) * sin(phi);
vectors[fctr]->_z = UNIVERSE_SCALE * sin(theta);
}
}
}
delete stream;
return true;
}
void CConstellations::draw(CSurfaceArea *surface, CCamera *camera) {
if (_data.empty())
return;
FPose pose = camera->getPose();
double threshold = camera->getFrontClip();
double centerX = (double)surface->_width / 2.0F;
double centerY = (double)surface->_height / 2.0F;
FVector ec0, ec1;
FVector sc0, sc1;
// Set the drawing mode, saving the old mode
surface->_pixel = 0xffff00;
uint oldPixel = surface->_pixel;
surface->setColorFromPixel();
SurfaceAreaMode oldMode = surface->setMode(SA_SOLID);
// Iterate through the constellations
for (uint conCtr = 0; conCtr < _data.size(); ++conCtr) {
const Constellation &con = _data[conCtr];
if (con.empty())
continue;
for (uint idx = 0; idx < con.size(); ++idx) {
const FVector &ps = con[idx]._start;
ec0._x = ps._x * pose._row1._x + ps._y * pose._row2._x + ps._z * pose._row3._x + pose._vector._x;
ec0._y = ps._x * pose._row1._y + ps._y * pose._row2._y + ps._z * pose._row3._y + pose._vector._y;
ec0._z = ps._x * pose._row1._z + ps._y * pose._row2._z + ps._z * pose._row3._z + pose._vector._z;
const FVector &pe = con[idx]._end;
ec1._x = pe._x * pose._row1._x + pe._y * pose._row2._x + pe._z * pose._row3._x + pose._vector._x;
ec1._y = pe._x * pose._row1._y + pe._y * pose._row2._y + pe._z * pose._row3._y + pose._vector._y;
ec1._z = pe._x * pose._row1._z + pe._y * pose._row2._z + pe._z * pose._row3._z + pose._vector._z;
// Draw if the constellation line is visible
if (ec0._z > threshold && ec1._z > threshold) {
sc0 = camera->getRelativePos(2, ec0);
sc1 = camera->getRelativePos(2, ec1);
surface->drawLine(Point(sc0._x + centerX, sc0._y + centerY),
Point(sc1._x + centerX, sc1._y + centerY));
}
}
}
// Restore the old state
surface->_pixel = oldPixel;
surface->setColorFromPixel();
surface->setMode(oldMode);
}
} // End of namespace Titanic
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