/// <summary>
/// Returns the percentage of an intersection of the character sprite with a tile.
/// </summary>
public static float NormalizedIntersectionAmount(RunCharacterController character, TileRow tile)
{
// get the bounds
var tileBounds = RetrieveBounds(tile);
var characterBounds = RetrieveBounds(character);
// calculate the x/y overlap
var xOverlap = max(0, min(tileBounds.max.x, characterBounds.max.x) - max(tileBounds.min.x, characterBounds.min.x));
var yOverlap = max(0, min(tileBounds.max.y, characterBounds.max.y) - max(tileBounds.min.y, characterBounds.min.y));
// an overlap is also just a rectangle - so calculate the area occupied
var overlapArea = xOverlap * yOverlap;
// similarly calculate the area of the character occupied
var characterArea = characterBounds.size.x * characterBounds.size.y;
// return the fraction of how much overlap occurs on the character sprite
return(overlapArea / characterArea);
}
/// <summary>
/// Extracts the correct bounds from a CharacterController
/// </summary>
private static Bounds RetrieveBounds(RunCharacterController character)
{
var characterExtents = character.CharacterSprite.bounds.extents;
return(new Bounds(character.Transform.position, characterExtents));
}
