110 lines
3.1 KiB
C++
110 lines
3.1 KiB
C++
/***************************************************************************
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alienBlaster
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Copyright (C) 2004
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Paul Grathwohl, Arne Hormann, Daniel Kuehn, Soenke Schwardt
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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 2, or (at your option)
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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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***************************************************************************/
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using namespace std;
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#include "explosion.h"
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#include "surfaceDB.h"
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#include "mixer.h"
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#include "global.h"
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Explosion::Explosion(string fn, const Vector2D &position,
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const Vector2D &velocity, const ExplosionTypes &explosionType) {
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sprite = surfaceDB.loadSurface(fn, true);
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nrAnimStages = sprite->w / sprite->h;
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expired = false;
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sndExplosion = Mixer::mixer().loadSample( FN_SOUND_EXPLOSION_NORMAL );
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Mixer::mixer().playSample( sndExplosion, 0 );
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this->explosionType = explosionType;
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pos = position;
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vel = velocity;
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switch (explosionType) {
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case EXPLOSION_NORMAL_AIR:
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case EXPLOSION_NORMAL_GROUND:
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{
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timePerStage = LIFETIME_EXPL_NORMAL / nrAnimStages;
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break;
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}
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default:
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{
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timePerStage = 0;
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actAnimStage = nrAnimStages;
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break;
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}
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}
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actAnimStage = 0;
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timeLived = 0;
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timeNextAnimStage = timePerStage;
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}
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Explosion::~Explosion() {}
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void Explosion::update( int dT ) {
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if ( scrollingOn ) pos += vel * dT / 1000.0;
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timeLived += dT;
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if ( timeLived > timeNextAnimStage ) {
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timeNextAnimStage += timePerStage;
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actAnimStage++;
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if (actAnimStage == nrAnimStages) expired = true;
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}
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}
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void Explosion::drawAirExplosion(SdlCompat_AcceleratedSurface *screen) {
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if (expired) return;
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if ( ! ( explosionType == EXPLOSION_NORMAL_AIR ) ) return;
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SDL_Rect dest;
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dest.x = lroundf(pos.getX()) - sprite->w / (2*nrAnimStages);
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dest.y = lroundf(pos.getY()) - sprite->h / 2;
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dest.w = sprite->w / nrAnimStages;
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dest.h = sprite->h;
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SDL_Rect src;
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src.x = actAnimStage * sprite->w / nrAnimStages;
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src.y = 0;
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src.w = sprite->w / nrAnimStages;
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src.h = sprite->h;
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SDL_BlitSurface( sprite, &src, screen, &dest );
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}
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void Explosion::drawGroundExplosion(SdlCompat_AcceleratedSurface *screen) {
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if (expired) return;
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if ( ! ( explosionType == EXPLOSION_NORMAL_GROUND ) ) return;
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SDL_Rect dest;
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dest.x = lroundf(pos.getX()) - sprite->w / (2*nrAnimStages);
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dest.y = lroundf(pos.getY()) - sprite->h / 2;
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dest.w = sprite->w / nrAnimStages;
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dest.h = sprite->h;
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SDL_Rect src;
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src.x = actAnimStage * sprite->w / nrAnimStages;
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src.y = 0;
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src.w = sprite->w / nrAnimStages;
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src.h = sprite->h;
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SDL_BlitSurface( sprite, &src, screen, &dest );
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}
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