/**
* analyzes pixel map for colors, identifying emojiCovered, emojiUncovered, scoreAreaCovered
*
* @param pixels 1D pixel Map to analyze
*
* @return results of analysis in AnalyzeScoreAreaResult
*/
public static AnalyzeScoreAreaResult AnalyzePixelMap(Color[] pixels)
{
var result = new AnalyzeScoreAreaResult();
int emojiCovered = 0;
int scoreAreaCovered = 0;
int emojiUncovered = 0;
foreach (var pixel in pixels)
{
if (pixel.r > 0 && pixel.g > 0)
{
scoreAreaCovered++;
}
else if (pixel.b > 0 && pixel.g > 0)
{
emojiCovered++;
}
else if (pixel.b > 0)
{
emojiUncovered++;
}
}
result.EmojiCovered = emojiCovered;
result.BackgroundCovered = scoreAreaCovered;
result.EmojiUncovered = emojiUncovered;
return(result);
}
/**
* Analyze scorable view, create virtual screenshot, read pixels, analyse pixels, read score, trigger ScoreArea.ChangeScore() in a coroutine
*
* @param scoreArea ScoreArea to analyze
* @param renderer Renderer of score area
* @param cam Main Camera
*/
public IEnumerator AnalyzeScoreableView(ScoreArea scoreArea, Renderer sceneRenderer, Camera cam)
{
var bounds = sceneRenderer.bounds;
// get dimensions of Score Area
var size = cam.WorldToScreenPoint(bounds.max);
// get position and transform to screen point
var position = cam.WorldToScreenPoint(bounds.min);
// create texture to store "screenshot" in
var img = new Texture2D((int)(size.x - position.x), (int)(size.y - position.y), TextureFormat.RGB24,
false);
// create rectengular at score area
var rect = new Rect((Vector2)position, (Vector2)(size - position));
// wait for frame ot be rendered
yield return(new WaitForEndOfFrame());
// create the image
img.ReadPixels(rect, 0, 0);
img.Apply();
//byte[] toPNG = img.EncodeToPNG();
//System.IO.File.WriteAllBytes("./screenshot.png", toPNG);
var pixels = img.GetPixels();
//analyze pixels
AnalyzeScoreAreaResult result = AnalyzePixelMap(pixels);
//calculate score
var score = CalculateScore(result);
scoreArea.HandleScore(score);
yield return(null);
}
/**
* calculates score from AnalyzeScoreAreaResult within range -100:100
* 50% "good coverage": 0 points
* 100%: 100 points
*
* @param analyzed AnalyzeScoreAreaResults to analyze
*/
public static int CalculateScore(AnalyzeScoreAreaResult analyzed)
{
// emoji size must not be zero!
if (analyzed.EmojiCovered + analyzed.EmojiUncovered < 1)
{
return(0);
}
int score = (int)(150 * (analyzed.EmojiCovered - 0.7 * analyzed.BackgroundCovered) /
(analyzed.EmojiCovered + analyzed.EmojiUncovered) - 50);
// do not loose more then 100 points per emoji
if (score < -50)
{
score = -50;
}
return(score);
}
