Avoid crashing when trying to access info file.

[supertux.git] / src / gameobjs.cpp

diff --git a/src/gameobjs.cpp b/src/gameobjs.cpp
index 2bde3cb..5340bfb 100644 (file)
--- a/src/gameobjs.cpp
+++ b/src/gameobjs.cpp
@@ -32,6 +32,8 @@
 #include "resources.h"
 #include "sector.h"
 #include "tilemap.h"
+#include "video/drawing_context.h"
+#include "camera.h"
 
 BouncyDistro::BouncyDistro(const Vector& pos)
   : position(pos)
@@ -112,32 +114,58 @@ BouncyBrick::draw(DrawingContext& context)
     draw_tile(context, shape.id, position + Vector(0, offset), LAYER_TILES+1);
 }
 
-FloatingScore::FloatingScore(const Vector& pos, int score)
+FloatingText::FloatingText(const Vector& pos, const std::string& text_)
+  : position(pos), text(text_)
+{
+  timer.start(1000);
+  position.x -= text.size() * 8;
+}
+
+FloatingText::FloatingText(const Vector& pos, int score)
   : position(pos)
 {
   timer.start(1000);
+
+  // turn int into a string
+  char str[10];
   snprintf(str, 10, "%d", score);
-  position.x -= strlen(str) * 8;
+  text = str;
+
+  position.x -= text.size() * 8;
 }
 
 void
-FloatingScore::action(float elapsed_time)
+FloatingText::action(float elapsed_time)
 {
-  position.y -= 2 * elapsed_time;
+  position.y -= 1.4 * elapsed_time;
 
   if(!timer.check())
     remove_me();
 }
 
+#define FADING_TIME 350
+
 void
-FloatingScore::draw(DrawingContext& context)
+FloatingText::draw(DrawingContext& context)
 {
-  context.draw_text(gold_text, str, position, LAYER_OBJECTS);
+  // make an alpha animation when disapearing
+  int alpha;
+  if(timer.get_left() < FADING_TIME)
+    alpha = timer.get_left() * 255 / FADING_TIME;
+  else
+    alpha = 255;
+
+  context.push_transform();
+  context.set_alpha(alpha);
+
+  context.draw_text(gold_text, text, position, LEFT_ALLIGN, LAYER_OBJECTS+1);
+
+  context.pop_transform();
 }
 
 /* Trampoline */
 
-Sprite *img_trampoline[TRAMPOLINE_FRAMES];
+Sprite *img_trampoline;
 
 Trampoline::Trampoline(LispReader& reader)
 {
@@ -181,7 +209,8 @@ Trampoline::write(LispWriter& writer)
 void
 Trampoline::draw(DrawingContext& context)
 {
-  img_trampoline[frame]->draw(context, base, LAYER_OBJECTS);
+  img_trampoline->set_frame(frame);
+  img_trampoline->draw(context, base, LAYER_OBJECTS);
   frame = 0;
 }
 
@@ -418,13 +447,13 @@ Sprite *img_smoke_cloud;
 SmokeCloud::SmokeCloud(const Vector& pos)
   : position(pos)
 {
-  timer.start(250);
+  timer.start(300);
 }
 
 void
 SmokeCloud::action(float elapsed_time)
 {
-  position.y -= 2 * elapsed_time;
+  position.y -= 1.2 * elapsed_time;
 
   if(!timer.check())
     remove_me();
@@ -436,17 +465,78 @@ SmokeCloud::draw(DrawingContext& context)
   img_smoke_cloud->draw(context, position, LAYER_OBJECTS+1);
 }
 
-void load_object_gfx()
+Particles::Particles(const Vector& epicenter, const Vector& velocity, const Vector& acceleration, int number, Color color_, int size_, int life_time)
+  : color(color_), size(size_), vel(velocity), accel(acceleration)
 {
-  char sprite_name[16];
+  if(life_time == 0)
+    {
+    live_forever = true;
+    }
+  else
+    {
+    live_forever = false;
+    timer.start(life_time);
+    }
 
-  for (int i = 0; i < TRAMPOLINE_FRAMES; i++)
-  {
-    sprintf(sprite_name, "trampoline-%i", i+1);
-    img_trampoline[i] = sprite_manager->load(sprite_name);
-  }
+  // create particles
+  for(int p = 0; p < number; p++)
+    {
+    Particle* particle = new Particle;
+    particle->pos = epicenter;
+    particle->angle = (rand() % 360) * (M_PI / 180);  // in radius
 
-  img_flying_platform = sprite_manager->load("flying_platform");
+    particles.push_back(particle);
+    }
+}
+
+Particles::~Particles()
+{
+  // free particles
+  for(std::vector<Particle*>::iterator i = particles.begin(); i < particles.end(); i++)
+    delete (*i);
+}
+
+void
+Particles::action(float elapsed_time)
+{
+  vel.x += accel.x * elapsed_time;
+  vel.y += accel.y * elapsed_time;
+
+  int camera_x = (int)Sector::current()->camera->get_translation().x;
+  int camera_y = (int)Sector::current()->camera->get_translation().y;
+
+  // update particles
+  for(std::vector<Particle*>::iterator i = particles.begin(); i < particles.end(); i++)
+    {
+    (*i)->pos.x += sin((*i)->angle) * vel.x * elapsed_time;
+    (*i)->pos.y += cos((*i)->angle) * vel.y * elapsed_time;
+
+    if((*i)->pos.x < camera_x || (*i)->pos.x > screen->w + camera_x ||
+       (*i)->pos.y < camera_y || (*i)->pos.y > screen->h + camera_y)
+      {
+      delete (*i);
+      particles.erase(i);
+      }
+    }
 
+  if((!timer.check() && !live_forever) || particles.size() == 0)
+    remove_me();
+}
+
+void
+Particles::draw(DrawingContext& context)
+{
+  // draw particles
+  for(std::vector<Particle*>::iterator i = particles.begin(); i < particles.end(); i++)
+    {
+    context.draw_filled_rect((*i)->pos, Vector(size,size), color, LAYER_OBJECTS+10);
+    }
+}
+
+void load_object_gfx()
+{
+  img_trampoline = sprite_manager->load("trampoline");
+  img_trampoline->start_animation(0);
+  img_flying_platform = sprite_manager->load("flying_platform");
   img_smoke_cloud = sprite_manager->load("stomp");
 }