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https://github.com/libretro/scummvm.git
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124 lines
3.9 KiB
C++
124 lines
3.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (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,
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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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*
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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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "titanic/star_control/const_boundaries.h"
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#include "titanic/star_control/camera.h"
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#include "titanic/star_control/star_field.h"
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#include "titanic/star_control/surface_area.h"
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#include "titanic/support/files_manager.h"
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#include "titanic/titanic.h"
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#include "common/math.h"
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namespace Titanic {
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#define ARRAY_COUNT 876
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CConstBoundaries::CConstBoundaries() {
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}
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bool CConstBoundaries::initialize() {
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double y, z, ra, dec, phi, theta;
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// Get a reference to the starfield points resource
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Common::SeekableReadStream *stream = g_vm->_filesManager->getResource("STARFIELD/POINTS");
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assert(stream && stream->size() == (12 * ARRAY_COUNT));
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_data.resize(ARRAY_COUNT);
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for (int idx = 0; idx < ARRAY_COUNT; ++idx) {
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CBoundaryVector &entry = _data[idx];
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// Get the next set of values
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entry._isDrawn = (idx == 0) ? 0 : stream->readUint32LE() != 0;
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y = stream->readSint32LE();
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z = stream->readSint32LE();
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ra = y * 360.0F / 24000.0F;
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dec = z / 100.0F;
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// Work the polar coordinates
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phi = Common::deg2rad<double>(ra);
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theta = Common::deg2rad<double>(dec);
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entry._x = UNIVERSE_SCALE * cos(theta) * cos(phi);
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entry._y = UNIVERSE_SCALE * cos(theta) * sin(phi);
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entry._z = UNIVERSE_SCALE * sin(theta);
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}
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delete stream;
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return true;
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}
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void CConstBoundaries::draw(CSurfaceArea *surface, CCamera *camera) {
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if (_data.empty())
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return;
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// get the current camera transform.
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FPose pose = camera->getPose();
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float threshold = camera->getFrontClip();
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float centerX = (float)surface->_width / 2.0f;
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float centerY = (float)surface->_height / 2.0f;
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FVector ec0, ec1, wc;
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FVector sc0, sc1;
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// Get the starting point
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wc = _data[0];
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ec0._x = wc._x * pose._row1._x + wc._y * pose._row2._x + wc._z * pose._row3._x + pose._vector._x;
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ec0._y = wc._x * pose._row1._y + wc._y * pose._row2._y + wc._z * pose._row3._y + pose._vector._y;
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ec0._z = wc._x * pose._row1._z + wc._y * pose._row2._z + wc._z * pose._row3._z + pose._vector._z;
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// Set the drawing mode and color
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surface->_pixel = 0xff0000;
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uint oldPixel = surface->_pixel;
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surface->setColorFromPixel();
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SurfaceAreaMode oldMode = surface->setMode(SA_SOLID);
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// Iterate through each remaining point
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for (uint idx = 1; idx < _data.size(); ++idx) {
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// Process the next point
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wc = _data[idx];
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ec1._x = wc._x * pose._row1._x + wc._y * pose._row2._x + wc._z * pose._row3._x + pose._vector._x;
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ec1._y = wc._x * pose._row1._y + wc._y * pose._row2._y + wc._z * pose._row3._y + pose._vector._y;
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ec1._z = wc._x * pose._row1._z + wc._y * pose._row2._z + wc._z * pose._row3._z + pose._vector._z;
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// Is this connected to the previous point?
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if (_data[idx]._isDrawn) {
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if (ec0._z > threshold && ec1._z > threshold) {
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// Render the line
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sc0 = camera->getRelativePos(2, ec0);
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sc1 = camera->getRelativePos(2, ec1);
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surface->drawLine(FPoint(sc0._x + centerX, sc0._y + centerY),
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FPoint(sc1._x + centerX, sc1._y + centerY));
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}
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}
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ec0 = ec1;
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}
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// Reset back to previous
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surface->_pixel = oldPixel;
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surface->setColorFromPixel();
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surface->setMode(oldMode);
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}
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} // End of namespace Titanic
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