public void Update(GameTime gameTime, int time_multiplier, MouseState mousestate)
{
float delta_time = gameTime.ElapsedGameTime.Milliseconds / 1000f;
float new_x = Center.X + m_speed * delta_time * time_multiplier;
StagePositionInformation info_obj = m_current_stage.InfoAt(-new_x);
if (info_obj.valid)
{
Center = new Vector2(new_x, -info_obj.height + m_road_offset + m_texture.Height / 2);
Rotation = GetRotation();
}
base.Update();
}
public float GetRotation()
{
StagePositionInformation info_left = m_current_stage.InfoAt(-TopLeftPosition.X);
StagePositionInformation info_right = m_current_stage.InfoAt(-TopRightPosition.X);
if (!info_left.valid || !info_right.valid)
{
return(0f);
}
Vector2 diff = new Vector2(TopRightPosition.X, info_right.height) - new Vector2(TopLeftPosition.X, info_left.height);
return((float)Math.Atan2(-diff.Y, diff.X));
}
public StagePositionInformation InfoAt(float x)
{
StagePositionInformation info_object = new StagePositionInformation();
x = -x;
StageSegment target_segment = null;
for (int i = (int)Math.Floor(x / RoadWidth); i < m_stage_segments.Count; i++)
{
if (m_stage_segments[i].Position.X <= x && m_stage_segments[i].Position.X + RoadWidth >= x)
{
target_segment = m_stage_segments[i];
break;
}
}
if (target_segment == null)
{
Console.WriteLine("ERROR: InfoAt(" + x + ") - Could not find target segment.");
info_object.valid = false;
return(info_object);
}
float start_y = target_segment.TopLeftPosition.Y;
float target_y = start_y;
switch (target_segment.SegmentType)
{
case SegmentType.Down5:
case SegmentType.Down10:
start_y = target_segment.TopLeftPosition.Y + target_segment.Corrector;
target_y = target_segment.BottomRightPosition.Y - RoadHeight;
break;
case SegmentType.Up5:
case SegmentType.Up10:
start_y = target_segment.Position.Y - RoadHeight + target_segment.Corrector;
target_y = target_segment.TopRightPosition.Y;
break;
}
info_object.valid = true;
info_object.stage_segment = target_segment;
info_object.height = -MathHelper.Lerp(start_y, target_y, (x - target_segment.TopLeftPosition.X) / RoadWidth);
return(info_object);
}