rocket.cpp

#include "Rocket.h"
#include "precomp.h"

namespace Tmpl8
{
Rocket::Rocket(vec2 position, vec2 direction, float collision_radius, allignments allignment, Sprite* rocket_sprite)
    : position(position), speed(direction), collision_radius(collision_radius), allignment(allignment), current_frame(0), rocket_sprite(rocket_sprite), active(true)
{
}

Rocket::~Rocket()
{
}

void Rocket::Tick()
{
    position += speed;
    if (++current_frame > 8) current_frame = 0;
}

//Draw the sprite with the facing based on this rockets movement direction
void Rocket::Draw(Surface* screen)
{
    rocket_sprite->SetFrame(((abs(speed.x) > abs(speed.y)) ? ((speed.x < 0) ? 3 : 0) : ((speed.y < 0) ? 9 : 6)) + (current_frame / 3));
    rocket_sprite->Draw(screen, (int)position.x - 12, (int)position.y - 12);
}

//Does the given circle collide with this rockets collision circle?
bool Rocket::Intersects(vec2 position_other, float radius_other) const
{
    //Uses squared lengths to remove expensive square roots
    float distance_sqr = (position_other - position).sqrLength();

    if (distance_sqr <= ((collision_radius * collision_radius) + (radius_other * radius_other)))
    {
        return true;
    }
    else
    {
        return false;
    }
}

} // namespace Tmpl8