void PARTICLE::update(DISPLAY& disp, bool is_draw)
{
// update
if (data.particle_type == 3 || data.particle_type == 2) life -= 1;
else if (data.type != 2) life -= data.speed;
if (data.particle_type == 0 || (data.particle_type == 1 && life < starting_life/2)) {
x += data.speed * cos(theta);
y += data.speed * sin(theta);
}
// update frame
frame_index += data.frame_rate;
if (frame_index >= data.num_frames) {
if (data.type == 0) {
frame_index -= data.num_frames;
} else if (data.type) {
frame_index = data.num_frames-1;
if (data.type == 2) life = 0;
}
}
// update expansion (zoom type)
if (data.particle_type == 1) {
if (life < starting_life/2) {
expansion = life / starting_life;
if (!done_damage) do_damage();
if (chain_factor) chain();
}
else expansion = (starting_life - life) / starting_life;
} else if (data.particle_type == 2) {
// update expansion (solid type)
expansion = 1.0;
}
// draw
if (is_draw && is_on_screen(disp)) draw(disp);
}
void nx_display_cursor_set_pos(U8 x, U8 y) {
NX_ASSERT(is_on_screen(x, y));
display.cursor.x = x;
display.cursor.y = y;
}