Generated particles need not have any randomness in either angle or velocity.

[supertux.git] / src / object / particles.cpp

diff --git a/src/object/particles.cpp b/src/object/particles.cpp
index cea6c82..36d3b6e 100644 (file)
--- a/src/object/particles.cpp
+++ b/src/object/particles.cpp
@@ -1,12 +1,10 @@
-//  $Id$
-//
 //  SuperTux
 //  Copyright (C) 2006 Matthias Braun <matze@braunis.de>
 //
-//  This program is free software; you can redistribute it and/or
-//  modify it under the terms of the GNU General Public License
-//  as published by the Free Software Foundation; either version 2
-//  of the License, or (at your option) any later version.
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
 //
 //  This program is distributed in the hope that it will be useful,
 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -14,23 +12,29 @@
 //  GNU General Public License for more details.
 //
 //  You should have received a copy of the GNU General Public License
-//  along with this program; if not, write to the Free Software
-//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-#include <config.h>
+#include "object/particles.hpp"
 
 #include <math.h>
 
-#include "particles.hpp"
-#include "sector.hpp"
-#include "camera.hpp"
-#include "main.hpp"
-#include "random_generator.hpp"
+#include "math/random_generator.hpp"
+#include "object/camera.hpp"
+#include "supertux/globals.hpp"
+#include "supertux/sector.hpp"
+#include "video/drawing_context.hpp"
 
+//TODO: remove this function in favor of the one below
 Particles::Particles(const Vector& epicenter, int min_angle, int max_angle,
-        const Vector& initial_velocity, const Vector& acceleration, int number,
-        Color color_, int size_, float life_time, int drawing_layer_)
-  : accel(acceleration), color(color_), size(size_), drawing_layer(drawing_layer_)
+                     const Vector& initial_velocity, const Vector& acceleration, int number,
+                     Color color_, int size_, float life_time, int drawing_layer_) :
+  accel(acceleration),
+  timer(),
+  live_forever(),
+  color(color_),
+  size(size_),
+  drawing_layer(drawing_layer_),
+  particles()
 {
   if(life_time == 0) {
     live_forever = true;
@@ -41,28 +45,66 @@ Particles::Particles(const Vector& epicenter, int min_angle, int max_angle,
 
   // create particles
   for(int p = 0; p < number; p++)
-    {
+  {
     Particle* particle = new Particle;
     particle->pos = epicenter;
 
-    float angle = systemRandom.rand(min_angle, max_angle)
-                      * (M_PI / 180);  // convert to radius (radians?)
+    float angle = graphicsRandom.rand(min_angle, max_angle)
+      * (M_PI / 180);  // convert to radius (radians?)
     particle->vel.x = /*fabs*/(sin(angle)) * initial_velocity.x;
-//    if(angle >= M_PI && angle < M_PI*2)
-//      particle->vel.x *= -1;  // work around to fix signal
+    //    if(angle >= M_PI && angle < M_PI*2)
+    //      particle->vel.x *= -1;  // work around to fix signal
     particle->vel.y = /*fabs*/(cos(angle)) * initial_velocity.y;
-//    if(angle >= M_PI_2 && angle < 3*M_PI_2)
-//      particle->vel.y *= -1;
+    //    if(angle >= M_PI_2 && angle < 3*M_PI_2)
+    //      particle->vel.y *= -1;
 
     particles.push_back(particle);
-    }
+  }
+}
+
+Particles::Particles(const Vector& epicenter, int min_angle, int max_angle,
+                     const float min_initial_velocity, const float max_initial_velocity,
+                     const Vector& acceleration, int number, Color color_,
+                     int size_, float life_time, int drawing_layer_) :
+
+  accel(acceleration),
+  timer(),
+  live_forever(),
+  color(color_),
+  size(size_),
+  drawing_layer(drawing_layer_),
+  particles()
+{
+  if(life_time == 0) {
+    live_forever = true;
+  } else {
+    live_forever = false;
+    timer.start(life_time);
+  }
+
+  // create particles
+  for(int p = 0; p < number; p++)
+  {
+    Particle* particle = new Particle;
+    particle->pos = epicenter;
+
+    float velocity = (min_initial_velocity == max_initial_velocity) ? min_initial_velocity :
+                     graphicsRandom.rand(min_initial_velocity, max_initial_velocity);
+    float angle = (min_angle == max_angle) ? min_angle * (M_PI / 180) :
+                     graphicsRandom.rand(min_angle, max_angle) * (M_PI / 180);  // convert to radians
+    // Note that angle defined as clockwise from vertical (up is zero degrees, right is 90 degrees)
+    particle->vel.x = (sin(angle)) * velocity;
+    particle->vel.y = (-cos(angle)) * velocity;
+
+    particles.push_back(particle);
+  }
 }
 
 Particles::~Particles()
 {
   // free particles
   for(std::vector<Particle*>::iterator i = particles.begin();
-      i < particles.end(); i++)
+      i < particles.end(); ++i)
     delete (*i);
 }
 
@@ -98,8 +140,9 @@ Particles::draw(DrawingContext& context)
 {
   // draw particles
   for(std::vector<Particle*>::iterator i = particles.begin();
-      i != particles.end(); i++) {
+      i != particles.end(); ++i) {
     context.draw_filled_rect((*i)->pos, Vector(size,size), color,drawing_layer);
   }
 }
 
+/* EOF */