supertux/src/object/circleplatform.cpp

//  Copyright (C) 2020 Daniel Ward <weluvgoatz@gmail.com>
//
//  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
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  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, see <http://www.gnu.org/licenses/>.

#include "object/circleplatform.hpp"

#include "editor/editor.hpp"
#include "math/util.hpp"
#include "supertux/flip_level_transformer.hpp"
#include "util/reader_mapping.hpp"
#include "util/writer.hpp"
#include "video/surface.hpp"

CirclePlatform::CirclePlatform(const ReaderMapping& reader) :
  MovingSprite(reader, "images/objects/platforms/icebridge1.png", LAYER_OBJECTS, COLGROUP_STATIC),
  start_position(m_col.m_bbox.p1()),
  angle(0.0),
  radius(),
  speed(),
  timer(),
  time(0.0),
  m_radius_indicator(Surface::from_file("images/objects/platforms/circleplatform-editor.png"))
{
  reader.get("radius", radius, 100.0f);
  reader.get("speed", speed, 2.0f);
  reader.get("time", time, 0.0f);
  if (!Editor::is_active())
  {
    m_col.m_bbox.set_pos(Vector(start_position.x + cosf(angle) * radius,
                                start_position.y + sinf(angle) * radius));
    initialize();
  }
}

HitResponse
CirclePlatform::collision(GameObject& other, const CollisionHit& )
{
  return FORCE_MOVE;
}

ObjectSettings
CirclePlatform::get_settings()
{
  ObjectSettings result = MovingSprite::get_settings();

  result.add_float(_("Radius"), &radius, "radius", 100.0f);
  result.add_float(_("Speed"), &speed, "speed", 2.0f);
  result.add_float(_("Delay"), &time, "time", 0.0f);

  result.reorder({"radius", "speed", "time", "sprite", "x", "y"});

  return result;
}

void
CirclePlatform::update(float dt_sec)
{
  if (timer.get_timeleft() <= 0.00f)
  {
    time = 0;
    timer.stop();
    angle = fmodf(angle + dt_sec * speed, math::TAU);
    if (!Editor::is_active())
    {
      Vector newpos(start_position.x + cosf(angle) * radius,
                    start_position.y + sinf(angle) * radius);
      m_col.set_movement(newpos - get_pos());
      m_col.propagate_movement(newpos - get_pos());
    }
  }
}

void
CirclePlatform::on_flip(float height)
{
  MovingObject::on_flip(height);
  start_position.y = height - start_position.y - get_bbox().get_height();
  FlipLevelTransformer::transform_flip(m_flip);
}

void
CirclePlatform::draw(DrawingContext& context)
{
  MovingSprite::draw(context);

  if (Editor::is_active())
  {
    Rectf rect(Vector(get_pos().x - radius + get_bbox().get_width() / 2,
                      get_pos().y - radius + get_bbox().get_height() / 2),
               Sizef(radius * 2, radius * 2));
    context.color().draw_surface_scaled(m_radius_indicator, rect, m_layer);
  }
}

void
CirclePlatform::initialize()
{
  timer.start(time);
}