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254 lines
10 KiB
254 lines
10 KiB
/*
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* Copyright (c) 2010-2011 OTClient <https://github.com/edubart/otclient>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "particleemitter.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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#define DEG_TO_RAD (acos(-1)/180.0)
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Particle::Particle(const Point& pos, const Size& size, const PointF& velocity, const PointF& acceleration, float duration, const Color& color, TexturePtr texture)
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{
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m_rect = Rect(pos, size);
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m_pos = PointF(pos.x, pos.y);
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m_size = size;
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m_velocity = velocity;
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m_acceleration = acceleration;
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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_startTime = g_clock.time();
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m_lastUpdateTime = g_clock.time();
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m_finished = false;
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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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float elapsedTime = g_clock.timeElapsed(m_lastUpdateTime);
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m_lastUpdateTime = g_clock.time();
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// check if finished
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if(m_duration > 0 && g_clock.timeElapsed(m_startTime) >= m_duration) {
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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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PointF delta = m_velocity * elapsedTime;
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delta.y *= -1; // painter orientate Y axis in the inverse direction
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m_pos += delta;
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// update acceleration
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m_velocity += m_acceleration * elapsedTime;
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m_rect.moveTo((int)m_pos.x, (int)m_pos.y);
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}
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ParticleEmitter::ParticleEmitter()
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{
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m_position = Point(0, 0);
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m_duration = -1;
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m_burstRate = 1; m_burstCount = 32;
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m_currentBurst = 0;
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m_startTime = g_clock.time();
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m_finished = false;
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// particles default configuration. (make them reasonable for user detect missing properties on scripts)
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m_pMinPositionRadius = 0;
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m_pMaxPositionRadius = 3;
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m_pMinPositionAngle = 0;
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m_pMaxPositionAngle = 360;
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m_pMinSize = Size(32, 32);
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m_pMaxSize = Size(32, 32);
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m_pMinDuration = 0;
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m_pMaxDuration = 10;
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m_pMinVelocity = 32;
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m_pMaxVelocity = 64;
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m_pMinVelocityAngle = 0;
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m_pMaxVelocityAngle = 360;
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m_pMinAcceleration = 32;
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m_pMaxAcceleration = 64;
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m_pMinAccelerationAngle = 0;
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m_pMaxAccelerationAngle = 360;
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m_pColor = Color(255, 255, 255, 128);
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}
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bool ParticleEmitter::load(const OTMLNodePtr& node)
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{
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for(const OTMLNodePtr& childNode : node->children()) {
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// self related
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if(childNode->tag() == "position")
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m_position = childNode->value<Point>();
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else if(childNode->tag() == "duration")
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m_duration = childNode->value<float>();
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else if(childNode->tag() == "burstRate")
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m_burstRate = childNode->value<float>();
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else if(childNode->tag() == "burstCount")
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m_burstCount = childNode->value<int>();
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// particles generation related
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else if(childNode->tag() == "particle-position-radius") {
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m_pMinPositionRadius = childNode->value<float>();
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m_pMaxPositionRadius = childNode->value<float>();
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}
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else if(childNode->tag() == "particle-min-position-radius")
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m_pMinPositionRadius = childNode->value<float>();
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else if(childNode->tag() == "particle-max-position-radius")
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m_pMaxPositionRadius = childNode->value<float>();
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else if(childNode->tag() == "particle-position-angle") {
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m_pMinPositionAngle = childNode->value<float>() * DEG_TO_RAD;
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m_pMaxPositionAngle = childNode->value<float>() * DEG_TO_RAD;
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}
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else if(childNode->tag() == "particle-min-position-angle")
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m_pMinPositionAngle = childNode->value<float>() * DEG_TO_RAD;
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else if(childNode->tag() == "particle-max-position-angle")
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m_pMaxPositionAngle = childNode->value<float>() * DEG_TO_RAD;
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else if(childNode->tag() == "particle-velocity") {
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m_pMinVelocity = childNode->value<float>();
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m_pMaxVelocity = childNode->value<float>();
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}
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else if(childNode->tag() == "particle-min-velocity")
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m_pMinVelocity = childNode->value<float>();
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else if(childNode->tag() == "particle-max-velocity")
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m_pMaxVelocity = childNode->value<float>();
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else if(childNode->tag() == "particle-velocity-angle") {
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m_pMinVelocityAngle = childNode->value<float>() * DEG_TO_RAD;
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m_pMaxVelocityAngle = childNode->value<float>() * DEG_TO_RAD;
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}
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else if(childNode->tag() == "particle-min-velocity-angle")
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m_pMinVelocityAngle = childNode->value<float>() * DEG_TO_RAD;
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else if(childNode->tag() == "particle-max-velocity-angle")
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m_pMaxVelocityAngle = childNode->value<float>() * DEG_TO_RAD;
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else if(childNode->tag() == "particle-acceleration") {
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m_pMinAcceleration = childNode->value<float>();
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m_pMaxAcceleration = childNode->value<float>();
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}
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else if(childNode->tag() == "particle-min-acceleration")
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m_pMinAcceleration = childNode->value<float>();
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else if(childNode->tag() == "particle-max-acceleration")
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m_pMaxAcceleration = childNode->value<float>();
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else if(childNode->tag() == "particle-acceleration-angle") {
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m_pMinAccelerationAngle = childNode->value<float>() * DEG_TO_RAD;
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m_pMaxAccelerationAngle = childNode->value<float>() * DEG_TO_RAD;
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}
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else if(childNode->tag() == "particle-min-acceleration-angle")
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m_pMinAccelerationAngle = childNode->value<float>() * DEG_TO_RAD;
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else if(childNode->tag() == "particle-max-acceleration-angle")
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m_pMaxAccelerationAngle = childNode->value<float>() * DEG_TO_RAD;
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else if(childNode->tag() == "particle-duration") {
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m_pMinDuration = childNode->value<float>();
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m_pMaxDuration = childNode->value<float>();
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}
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else if(childNode->tag() == "particle-min-duration")
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m_pMinDuration = childNode->value<float>();
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else if(childNode->tag() == "particle-max-duration")
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m_pMaxDuration = childNode->value<float>();
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else if(childNode->tag() == "particle-size") {
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m_pMinSize = childNode->value<Size>();
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m_pMaxSize = childNode->value<Size>();
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}
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else if(childNode->tag() == "particle-min-size")
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m_pMinSize = childNode->value<Size>();
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else if(childNode->tag() == "particle-max-size")
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m_pMaxSize = childNode->value<Size>();
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else if(childNode->tag() == "particle-color")
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m_pColor = childNode->value<Color>();
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else if(childNode->tag() == "particle-texture")
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m_pTexture = g_textures.getTexture(childNode->value());
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}
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return true;
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}
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void ParticleEmitter::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 ParticleEmitter::update()
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{
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float elapsedTime = g_clock.timeElapsed(m_startTime);
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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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// check if finished
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if(m_duration > 0 && elapsedTime > m_duration) {
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// stop emitting but only self remove when there are no particles left
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if(m_particles.size() == 0)
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m_finished = true;
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return;
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}
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int currentBurst = (elapsedTime / m_burstRate) + 1;
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for(int b = m_currentBurst; b < currentBurst; ++b) {
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// every burst created at same position.
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float pRadius = Fw::randomRange(m_pMinPositionRadius, m_pMaxPositionRadius);
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float pAngle = Fw::randomRange(m_pMinPositionAngle, m_pMaxPositionAngle);
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Point pPosition = m_position + Point(pRadius * cos(pAngle), pRadius * sin(pAngle));
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for(int p = 0; p < m_burstCount; ++p) {
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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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// particles initial velocity
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float pVelocityAbs = Fw::randomRange(m_pMinVelocity, m_pMaxVelocity);
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float pVelocityAngle = Fw::randomRange(m_pMinVelocityAngle, m_pMaxVelocityAngle);
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PointF pVelocity(pVelocityAbs * cos(pVelocityAngle), pVelocityAbs * sin(pVelocityAngle));
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// particles initial acceleration
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float pAccelerationAbs = Fw::randomRange(m_pMinAcceleration, m_pMaxAcceleration);
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float pAccelerationAngle = Fw::randomRange(m_pMinAccelerationAngle, m_pMaxAccelerationAngle);
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PointF pAcceleration(pAccelerationAbs * cos(pAccelerationAngle), pAccelerationAbs * sin(pAccelerationAngle));
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m_particles.push_back(ParticlePtr(new Particle(pPosition, pSize, pVelocity, pAcceleration, pDuration, m_pColor, m_pTexture)));
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}
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}
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m_currentBurst = currentBurst;
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}
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