void DemoShooting::run_a_step(int time)
{
static double rad = 0.0;
static clan::Vec2f current_pos(460, 360);
static clan::Vec2f prev_pos;
rad -= 0.002*time;
if( rad < L_2PI )
rad += L_2PI;
prev_pos = current_pos;
current_pos.x = 140*cos(rad)+320;
current_pos.y = 140*sin(rad)+360;
L_Vector vel;
vel.set( (current_pos.x-prev_pos.x)/time,
(current_pos.y-prev_pos.y)/time );
effect->trigger();
/* it's recommended to use L_ParticleEffect::set_velocity() than just
to use L_ParticleEffect::set_position() if the desired position of effect
is not static or jumping. */
effect->set_velocity(vel);
effect->run(time);
/* set position(although velocity has been set before) to avoid error
being accumulated.*/
effect->set_position(current_pos.x, current_pos.y);
}
bool DemoMSmall::update()
{
canvas.clear();
clan::InputDevice &keyboard = window.get_keyboard();
static L_REAL x_pos = 320;
static L_REAL y_pos = 240;
L_REAL x_vel = 0;
L_REAL y_vel = 0;
if( keyboard.get_keycode(clan::keycode_up) )
y_vel = -0.2;
else if( keyboard.get_keycode(clan::keycode_down))
y_vel = 0.2;
if( keyboard.get_keycode(clan::keycode_left))
x_vel = -0.2;
else if( keyboard.get_keycode(clan::keycode_right))
x_vel = 0.2;
L_Vector vel;
vel.set( x_vel, y_vel );
uint64_t current_time = clan::System::get_time();
int time_run = current_time - last_time;
last_time = current_time;
x_pos += x_vel*time_run;
y_pos += y_vel*time_run;
effect->trigger();
effect->set_velocity(vel);
effect->run(time_run);
effect->set_position(x_pos, y_pos);
L_DrawParticle(canvas, effect.get());
if( show_menu )
{
frameratecounter.show_fps(canvas, font);
font.draw_text(canvas, 10, 30, clan::string_format("#Particle : %1", effect->get_particle_num()));
font.draw_text(canvas,10,410,"F1 : hide/show menu");
font.draw_text(canvas,10,425,"Space : trigger random sleep");
font.draw_text(canvas,10,440,"Arrow keys : move the effect");
}
window.flip(0); // Set to "1" to lock to screen refresh rate
frameratecounter.frame_shown();
if (quit)
{
// deinitialize LinearParticle
L_ParticleSystem::deinit();
}
return !quit;
}
void L_Particle::motion_process(void)
{
if( motion_controller != NULL )
{
if( motion_controller->motion_type == L_1D_ACCELERATION )
vec = vec + accel_vec_1d_to_2d.get_scaled_vector(time_elapesed);
else if( motion_controller->motion_type == L_2D_ACCELERATION )
vec = vec + motion_controller->acceleration_2d.get_scaled_vector(time_elapesed);
else if( motion_controller->motion_type == L_POINT_ACCELERATION )
{
L_Vector acc = motion_controller->acceleration_point_pos - L_Vector(x_pos, y_pos);
acc.set_magnitude(motion_controller->acceleration_point_mag);
vec = vec + acc.get_scaled_vector(time_elapesed);
}
if( vec.get_sqr_magnitude() > motion_controller->speed_limit_sqr )
vec.set_magnitude(motion_controller->speed_limit);
}
x_pos += vec.x*time_elapesed;
y_pos += vec.y*time_elapesed;
}
int DemoMSmall::run(clan::DisplayWindow &window)
{
clan::SlotContainer cc;
window.set_title("LinearParticle Example - MSmall ");
cc.connect(window.sig_window_close(), clan::bind_member(this, &DemoMSmall::on_window_close));
clan::Canvas canvas(window);
cc.connect(window.get_ic().get_keyboard().sig_key_up(), clan::bind_member(this, &DemoMSmall::on_key_up));
// initialize LinearParticle
L_ParticleSystem::init();
// create surface to be used for particle and set the alignment
clan::Sprite surface(canvas, "Resources/small.png");
surface.set_alignment(clan::origin_center);
motion_ctrl.set_speed_limit(0.1); // set max speed of particle
motion_ctrl.set_1d_acceleration(-0.0003); // set deceleration
// create sample of particle
L_Particle particle(&surface,2000);
particle.set_color(L_Color(255,110,60,255));
particle.coloring2(L_Color(255,110,60,255),L_Color(0,200,100,255),0.6);
particle.set_motion_controller(&motion_ctrl); // assign motion cotroller
// create explosion effect
effect = new L_ExplosionEffect(320,240,16,10,12,0.1);
effect->add(&particle);
// apply random life distortion for each emitted particle
effect->set_life_distortion(700);
effect->initialize();
char str[32];
quit = false;
show_menu = true;
clan::Font font(canvas, "Arial", 16 );
FramerateCounter frameratecounter;
clan::ubyte64 last_time = clan::System::get_time();
clan::InputDevice &keyboard = window.get_ic().get_keyboard();
while(!quit)
{
canvas.clear();
static L_REAL x_pos = 320;
static L_REAL y_pos = 240;
L_REAL x_vel = 0;
L_REAL y_vel = 0;
if( keyboard.get_keycode(clan::keycode_up) )
y_vel = -0.2;
else if( keyboard.get_keycode(clan::keycode_down))
y_vel = 0.2;
if( keyboard.get_keycode(clan::keycode_left))
x_vel = -0.2;
else if( keyboard.get_keycode(clan::keycode_right))
x_vel = 0.2;
L_Vector vel;
vel.set( x_vel, y_vel );
clan::ubyte64 current_time = clan::System::get_time();
int time_run = current_time - last_time;
last_time = current_time;
x_pos += x_vel*time_run;
y_pos += y_vel*time_run;
effect->trigger();
effect->set_velocity(vel);
effect->run(time_run);
effect->set_position(x_pos, y_pos);
L_DrawParticle(canvas, effect);
if( show_menu )
{
frameratecounter.show_fps(canvas, font);
sprintf(str,"#Particle : %d", effect->get_particle_num());
font.draw_text(canvas,10,30,str);
font.draw_text(canvas,10,410,"F1 : hide/show menu");
font.draw_text(canvas,10,425,"Space : trigger random sleep");
font.draw_text(canvas,10,440,"Arrow keys : move the effect");
}
window.flip(0); // Set to "1" to lock to screen refresh rate
frameratecounter.frame_shown();
clan::KeepAlive::process(0);
}
delete effect;
// deinitialize LinearParticle
L_ParticleSystem::deinit();
return 0;
}