public void Execute()
{
foreach (var gameEntity in this.snakeVisuals.GetEntities())
{
List <Vector2> positionParts = gameEntity.snakePosition.positions;
List <ViewEntity> visualParts = gameEntity.snakeVisual.linkedVisuals;
SnakeVisualDefinition visualDefinition = gameEntity.snakeVisual.snakeVisualDefinition;
{
Direction headDirection = this.GetPartDirection(positionParts[1], positionParts[0]);
this.SetSprite(visualParts[0], this.GetHeadSprite(headDirection, visualDefinition));
}
for (int i = 1; i < visualParts.Count - 1; i++)
{
Direction towardsHeadDirection = this.GetPartDirection(positionParts[i], positionParts[i - 1]);
Direction fromTailDirection = this.GetPartDirection(positionParts[i + 1], positionParts[i]);
this.SetSprite(visualParts[i], this.GetBodySprite(towardsHeadDirection, fromTailDirection, visualDefinition));
}
{
Direction tailDirection = this.GetPartDirection(positionParts[positionParts.Count - 1], positionParts[positionParts.Count - 2]);
this.SetSprite(visualParts[positionParts.Count - 1], this.GetTailSprite(tailDirection, visualDefinition));
}
for (int i = 0; i < visualParts.Count; i++)
{
visualParts[i].ReplacePosition(positionParts[i]);
}
}
}
Sprite GetHeadSprite(Direction direction, SnakeVisualDefinition visualDefinition)
{
switch (direction)
{
case Direction.Up:
return(visualDefinition.headUp);
case Direction.Down:
return(visualDefinition.headDown);
case Direction.Left:
return(visualDefinition.headLeft);
case Direction.Right:
return(visualDefinition.headRight);
default:
return(visualDefinition.headUp);
}
}
Sprite GetTailSprite(Direction direction, SnakeVisualDefinition visualDefinition)
{
switch (direction)
{
case Direction.Up:
return(visualDefinition.tailUp);
case Direction.Down:
return(visualDefinition.tailDown);
case Direction.Left:
return(visualDefinition.tailLeft);
case Direction.Right:
return(visualDefinition.tailRight);
default:
return(visualDefinition.tailUp);
}
}
Sprite GetBodySprite(Direction towardsHeadDirection, Direction fromTailDirection, SnakeVisualDefinition visualDefinition)
{
switch (fromTailDirection)
{
case Direction.Up:
switch (towardsHeadDirection)
{
case Direction.Up:
return(visualDefinition.straightUp);
case Direction.Down:
Assert.IsTrue(false, "This direction should not happen");
return(visualDefinition.straightUp);
case Direction.Left:
return(visualDefinition.upToLeft);
case Direction.Right:
return(visualDefinition.upToRight);
default:
return(visualDefinition.straightUp);
}
case Direction.Down:
switch (towardsHeadDirection)
{
case Direction.Up:
Assert.IsTrue(false, "This direction should not happen");
return(visualDefinition.straightDown);
case Direction.Down:
return(visualDefinition.straightDown);
case Direction.Left:
return(visualDefinition.downToLeft);
case Direction.Right:
return(visualDefinition.downToRight);
default:
return(visualDefinition.straightDown);
}
case Direction.Left:
switch (towardsHeadDirection)
{
case Direction.Up:
return(visualDefinition.leftToUp);
case Direction.Down:
return(visualDefinition.leftToDown);
case Direction.Left:
return(visualDefinition.straightLeft);
case Direction.Right:
Assert.IsTrue(false, "This direction should not happen");
return(visualDefinition.straightLeft);
default:
return(visualDefinition.straightLeft);
}
case Direction.Right:
switch (towardsHeadDirection)
{
case Direction.Up:
return(visualDefinition.rightToUp);
case Direction.Down:
return(visualDefinition.rightToDown);
case Direction.Left:
Assert.IsTrue(false, "This direction should not happen");
return(visualDefinition.straightRight);
case Direction.Right:
return(visualDefinition.straightRight);
default:
return(visualDefinition.straightRight);
}
default:
return(visualDefinition.straightUp);
}
}
