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particles colors

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This commit is contained in:
Henrique Santiago
2011-12-18 00:21:12 -02:00
parent eed6fab4b1
commit 6973e1639a
8 changed files with 94 additions and 63 deletions
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33
src/framework/graphics/particle.cpp
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@@ -24,14 +24,17 @@
#include "graphics.h"
#include <framework/core/clock.h>
Particle::Particle(const Point& pos, const Size& size, const PointF& velocity, const PointF& acceleration, float duration, float ignorePhysicsAfter, const Color& color, TexturePtr texture)
Particle::Particle(const Point& pos, const Size& size, const PointF& velocity, const PointF& acceleration, float duration, float ignorePhysicsAfter, const std::vector<Color>& colors, const std::vector<float>& colorsStops, TexturePtr texture)
{
m_colors = colors;
m_colorsStops = colorsStops;
m_rect = Rect(pos, size);
m_position = PointF(pos.x, pos.y);
m_size = size;
m_velocity = velocity;
m_acceleration = acceleration;
m_color = color;
m_texture = texture;
m_duration = duration;
m_ignorePhysicsAfter = ignorePhysicsAfter;
@@ -55,13 +58,14 @@ void Particle::render()
void Particle::update(double elapsedTime)
{
// check if finished
if(m_duration > 0 && m_elapsedTime >= m_duration) {
if(m_duration >= 0 && m_elapsedTime >= m_duration) {
m_finished = true;
return;
}
m_elapsedTime += elapsedTime;
updateColor();
// update position
if(m_ignorePhysicsAfter < 0 || m_elapsedTime < m_ignorePhysicsAfter ) {
// update position
PointF delta = m_velocity * elapsedTime;
@@ -73,4 +77,25 @@ void Particle::update(double elapsedTime)
m_rect.moveTo((int)m_position.x - m_size.width() / 2, (int)m_position.y - m_size.height() / 2);
}
m_elapsedTime += elapsedTime;
}
void Particle::updateColor()
{
if(m_elapsedTime < m_colorsStops[1]) {
m_color.setRGBA(m_colors[0].r() + (m_colors[1].r() - m_colors[0].r()) / (m_colorsStops[1] - m_colorsStops[0]) * (m_elapsedTime - m_colorsStops[0]),
m_colors[0].g() + (m_colors[1].g() - m_colors[0].g()) / (m_colorsStops[1] - m_colorsStops[0]) * (m_elapsedTime - m_colorsStops[0]),
m_colors[0].b() + (m_colors[1].b() - m_colors[0].b()) / (m_colorsStops[1] - m_colorsStops[0]) * (m_elapsedTime - m_colorsStops[0]),
m_colors[0].a() + (m_colors[1].a() - m_colors[0].a()) / (m_colorsStops[1] - m_colorsStops[0]) * (m_elapsedTime - m_colorsStops[0]));
}
else {
if(m_colors.size() > 1) {
m_colors.erase(m_colors.begin());
m_colorsStops.erase(m_colorsStops.begin());
}
else {
m_color = m_colors[0];
}
}
}