144 lines
4.2 KiB
C++
144 lines
4.2 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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#include <framework/graphics/texturemanager.h>
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#include <framework/util/tools.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_painter.setColor(m_color);
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if(!m_texture)
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g_painter.drawFilledRect(m_rect);
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else {
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g_painter.setCompositionMode(Painter::CompositionMode_AdditiveSource);
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g_painter.drawTexturedRect(m_rect, m_texture);
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g_painter.setCompositionMode(Painter::CompositionMode_SourceOver);
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}
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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 / (2.0 * 1000 * 1000)),
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m_iy + (m_vy * t / 1000.0) + (m_ay * t*t / (2.0 * 1000 * 1000)));
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}
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ParticleEmitter::ParticleEmitter(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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// particles default configuration. (make them reasonable detect missing properties on scripts)
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m_pPositionMinRadius = 0; m_pPositionMaxRadius = 3;
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m_pPositionMinAngle = 0; m_pPositionMaxAngle = 90;
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m_pMinSize = Size(32, 32); m_pMaxSize = Size(32, 32);
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m_pMinDuration = 0; m_pMaxDuration = 10;
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}
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void ParticleEmitter::render()
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{
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// testing
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//g_graphics.bindColor(Color(255, 255, 255));
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//g_graphics.drawFilledRect(Rect(0, 0, 400, 400));
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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 ParticleEmitter::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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const ParticlePtr& particle = *it;
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if(particle->hasFinished()) {
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it = m_particles.erase(it);
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continue;
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}
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particle->update();
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++it;
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}
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// create some particles
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TexturePtr tex = g_textures.getTexture("circle2.png");
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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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// \/ not working properly
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float pRadius = Fw::randomRange(m_pPositionMinRadius, m_pPositionMaxRadius);
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float pAngle = Fw::randomRange(m_pPositionMinAngle, m_pPositionMaxAngle) * 3.141592 / 180.0;
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Point pPosition = Point(cos(pAngle * pRadius), sin(pAngle * pRadius));
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Size pSize = Size(Fw::randomRange(m_pMinSize.width(), m_pMaxSize.width()), Fw::randomRange(m_pMinSize.height(), m_pMaxSize.height()));
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float pDuration = Fw::randomRange(m_pMinDuration, m_pMaxDuration);
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// todo: add random data generation
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m_particles.push_back(ParticlePtr(new Particle(Rect(m_position + pPosition, pSize), 16, 8, 0, 0, pDuration, Color(255, 0, 0, 32), tex)));
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}
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m_createdParticles = currentParticles;
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}
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void ParticlesSystem::add(const ParticleEmitterPtr& 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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const ParticleEmitterPtr& emitter = *it;
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if(emitter->hasFinished()) {
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it = m_emitters.erase(it);
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continue;
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}
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emitter->update();
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++it;
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}
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}
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