115 lines
2.7 KiB
C++
115 lines
2.7 KiB
C++
#include "particlessystem.h"
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#include "graphics.h"
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#include <framework/core/clock.h>
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Particle::Particle(const Rect& rect, float vx, float vy, float ax, float ay, float duration, const Color& color, TexturePtr texture)
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{
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m_rect = rect;
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m_ix = rect.x(); m_iy = rect.y();
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m_vx = vx; m_vy = vy;
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m_ax = ax; m_ay = ay;
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m_color = color;
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m_texture = texture;
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m_duration = duration;
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m_startTicks = g_clock.ticks();
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m_finished = false;
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}
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Particle::~Particle()
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{
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//dump << "deleted";
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}
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void Particle::render()
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{
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g_graphics.bindColor(m_color);
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if(!m_texture)
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g_graphics.drawFilledRect(m_rect);
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else
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g_graphics.drawTexturedRect(m_rect, m_texture);
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}
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void Particle::update()
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{
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ticks_t t = g_clock.ticks() - m_startTicks;
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// check if finished
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if(m_duration > 0 && t > m_duration * 1000) {
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m_finished = true;
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return;
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}
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//update position
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m_rect.moveTo(m_ix + (m_vx * t / 1000.0) + (m_ax * t*t / 2000.0),
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m_iy + (m_vy * t / 1000.0) + (m_ay * t*t / 2000.0));
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}
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Emitter::Emitter(const Point& position, float duration, int particlesPerSecond)
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{
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m_position = position;
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m_duration = duration;
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m_particlesPerSecond = particlesPerSecond;
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m_createdParticles = 0;
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m_startTicks = g_clock.ticks();
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m_finished = false;
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}
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void Emitter::render()
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{
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for(auto it = m_particles.begin(), end = m_particles.end(); it != end; ++it)
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(*it).render();
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}
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void Emitter::update()
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{
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ticks_t elapsedTicks = g_clock.ticks() - m_startTicks;
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// check if finished
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if(m_duration > 0 && elapsedTicks > m_duration * 1000) {
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m_finished = true;
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return;
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}
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// update particles
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for(auto it = m_particles.begin(), end = m_particles.end(); it != end;) {
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if((*it).hasFinished()) {
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it = m_particles.erase(it);
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continue;
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}
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(*it).update();
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++it;
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}
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// create some particles
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int currentParticles = 1 + elapsedTicks / 1000.0 * m_particlesPerSecond;
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for(int i = m_createdParticles; i < currentParticles; ++i) {
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// todo: add random data generation
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m_particles.push_back(Particle(Rect(100, 100, 16, 16), 16, 8, 0, 0, 1.5));
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}
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m_createdParticles = currentParticles;
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}
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void ParticlesSystem::add(Emitter emitter)
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{
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m_emitters.push_back(emitter);
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}
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void ParticlesSystem::render()
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{
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for(auto it = m_emitters.begin(), end = m_emitters.end(); it != end; ++it)
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(*it).render();
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}
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void ParticlesSystem::update()
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{
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for(auto it = m_emitters.begin(), end = m_emitters.end(); it != end;) {
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if((*it).hasFinished()) {
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it = m_emitters.erase(it);
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continue;
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}
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(*it).update();
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++it;
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}
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}
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