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117 lines
3.7 KiB
C++
117 lines
3.7 KiB
C++
/*
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* Copyright (c) 2010-2015 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 "particle.h"
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#include "graphics.h"
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#include <framework/core/clock.h>
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Particle::Particle(const Point& pos, const Size& startSize, const Size& finalSize, const PointF& velocity, const PointF& acceleration, float duration, float ignorePhysicsAfter, const std::vector<Color>& colors, const std::vector<float>& colorsStops, Painter::CompositionMode compositionMode, TexturePtr texture)
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{
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m_colors = colors;
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m_colorsStops = colorsStops;
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m_position = PointF(pos.x, pos.y);
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m_startSize = startSize;
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m_finalSize = finalSize;
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m_velocity = velocity;
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m_acceleration = acceleration;
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m_compositionMode = compositionMode;
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m_texture = texture;
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m_duration = duration;
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m_ignorePhysicsAfter = ignorePhysicsAfter;
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m_elapsedTime = 0;
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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(m_compositionMode);
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g_painter->drawTexturedRect(m_rect, m_texture);
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}
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}
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void Particle::update(float elapsedTime)
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{
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// check if finished
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if(m_duration >= 0 && m_elapsedTime >= m_duration) {
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m_finished = true;
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return;
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}
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updateColor();
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updateSize();
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updatePosition(elapsedTime);
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m_elapsedTime += elapsedTime;
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}
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void Particle::updatePosition(float elapsedTime)
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{
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if(m_ignorePhysicsAfter < 0 || m_elapsedTime < m_ignorePhysicsAfter ) {
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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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PointF position = m_position + delta;
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if(m_position != position) {
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m_position += delta;
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}
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// update acceleration
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m_velocity += m_acceleration * elapsedTime;
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}
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m_rect.move((int)m_position.x - m_size.width() / 2, (int)m_position.y - m_size.height() / 2);
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}
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void Particle::updateSize()
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{
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m_size = m_startSize + (m_finalSize - m_startSize) / m_duration * m_elapsedTime;
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m_rect.resize(m_size);
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}
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void Particle::updateColor()
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{
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float currentLife = m_elapsedTime / m_duration;
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if(currentLife < m_colorsStops[1]) {
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float range = m_colorsStops[1] - m_colorsStops[0];
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float factor = (currentLife - m_colorsStops[0])/range;
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m_color = m_colors[0] * (1.0f - factor) + m_colors[1] * factor;
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} else {
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if(m_colors.size() > 1) {
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m_colors.erase(m_colors.begin());
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m_colorsStops.erase(m_colorsStops.begin());
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} else {
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if(m_color != m_colors[0]) {
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m_color = m_colors[0];
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}
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}
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}
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}
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