/// <summary>
/// Factory method to create Section from a given BackgroundEntity
/// </summary>
/// <param name="backgroundEnt"></param>
/// <param name="maxObstacleOverride">The maximum number of obstacle in the block level</param>
/// <returns></returns>
private Section CreateLevelBlock(Entity backgroundEnt, int? maxObstacleOverride = null)
{
// Reset position
backgroundEnt.Transform.Position = Vector3.Zero;
var levelBlock = new Section();
var backgroundInfo = backgroundEnt.Get<BackgroundInfo>();
levelBlock.AddBackgroundEntity(backgroundEnt).AddHoleRange(backgroundInfo.Holes);
var len = levelBlock.Length;
RandomAddObstacles(levelBlock, len, maxObstacleOverride ?? backgroundInfo.MaxNbObstacles);
return levelBlock;
}
/// <summary>
/// Randomly add obstacles to the given level block, while
/// the number of obstacles to be added is from nbObst.
/// </summary>
/// <param name="section"></param>
/// <param name="patternLen"></param>
/// <param name="nbObst"></param>
private void RandomAddObstacles(Section section, float patternLen, int nbObst)
{
var halfPatternLen = patternLen / 2f;
for (var i = 0; i < nbObst; i++)
{
// Random val in {0.0-1.0}
var randVal = random.NextDouble();
// Calculate position in Z axis by:
// changing the value in uniform space (randVal) to world space.
// the value is substracted with halfPatternLen because the origin (0) is at the center of the block.
var posZ = patternLen * (float)((i + randVal) / nbObst) - halfPatternLen;
// Random lane, and get the world position in X axis.
var lane = random.Next(3);
var posX = (1 - lane) * 5f;
// Randomly get the obstacle, and set the position of this obstacle.
bool useSubBoundingBoxes;
var obsEnt = CloneRandomObstacle(out useSubBoundingBoxes);
obsEnt.Transform.Position = new Vector3(posX, 0, posZ);
section.AddObstacleEntity(obsEnt, useSubBoundingBoxes);
}
}
/// <summary>
/// Factory method to create Section from a given BackgroundEntity
/// </summary>
/// <param name="backgroundEnt"></param>
/// <returns></returns>
private Section CreateLevelBlock(BackgroundEntity backgroundEnt)
{
var levelBlock = new Section();
levelBlock.AddBackgroundEntity(backgroundEnt.Entity).AddHoleRange(backgroundEnt.Holes);
var len = levelBlock.Length;
RandomAddObstacles(levelBlock, len, backgroundEnt.MaxNbObstacles);
return levelBlock;
}
public Section CreateSafeLevelBlock()
{
var safeBackground = GetBackgroundEntity(BgKeys.bg_a00);
var levelBlock = new Section();
levelBlock.AddBackgroundEntity(safeBackground.Entity);
return levelBlock;
}
private void RemoveLevelBlock(Section firstBlock)
{
levelBlocks.Remove(firstBlock);
Entity.RemoveChild(firstBlock.RootEntity);
}
private void AddLevelBlock(Section newSection)
{
var count = levelBlocks.Count;
levelBlocks.Add(newSection);
if (count == 0)
{
Entity.AddChild(newSection.RootEntity);
return;
}
var prevLatestBlock = levelBlocks[count - 1];
var originDist = 0.5f * (prevLatestBlock.Length + newSection.Length);
newSection.PositionZ = prevLatestBlock.PositionZ + originDist;
Entity.AddChild(newSection.RootEntity);
}