//----------------------------------------------------------------------------------------------------------------------------------------------------------
// Extract and mask image-piece to be used as puzzle-piece texture
Texture2D ExtractFromImage(Texture2D _image, PuzzleElement _puzzlElement, int _x, int _y, int _elementBaseSize, Vector2 _elementSizeRatio)
{
// Get proper piece of image
Color[] pixels = _image.GetPixels(
(int)((_x * _elementBaseSize - _puzzlElement.pixelOffset.x) * _elementSizeRatio.x),
(int)(_image.height - (_y + 1) * _elementBaseSize * _elementSizeRatio.y - _puzzlElement.pixelOffset.height * _elementSizeRatio.y),
(int)(_puzzlElement.maskWidth * _elementSizeRatio.x),
(int)(_puzzlElement.maskHeight * _elementSizeRatio.y)
);
Texture2D result = new Texture2D(
(int)(_puzzlElement.maskWidth * _elementSizeRatio.x),
(int)(_puzzlElement.maskHeight * _elementSizeRatio.y)
);
// Apply mask
result.wrapMode = TextureWrapMode.Clamp;
_puzzlElement.ApplyMask(pixels, ref result);
return(result);
}
//----------------------------------------------------------------------------------------------------------------------------------------------------------
// Generates example puzzle-piece/ to be shown as preview in Editor window
Texture2D GenerateExamplePiece(Texture2D _subElement, int _elementBaseSize)
{
PuzzleElement puzzlePiece;
// Calculate randomly which sub-element variants should be used
int top = Random.Range(-1, 1) * 2 + 1;
int left = Random.Range(-1, 1) * 2 + 1;
int bottom = Random.Range(-1, 1) * 2 + 1;
int right = Random.Range(-1, 1) * 2 + 1;
// Prepare sub-element variants
Color[] subElementPixels = _subElement.GetPixels();
Color[] topPixels = subElementPixels;
Color[] leftPixels = TextureUtility.Rotate90(subElementPixels, _subElement.width, _subElement.height, false);
// Prepare element mask
puzzlePiece = new PuzzleElement
(
top, left, bottom, right,
_elementBaseSize,
_subElement,
topPixels, leftPixels
);
// Create resultTexture
puzzlePiece.texture = new Texture2D(puzzlePiece.maskWidth, puzzlePiece.maskHeight);
Color[] piecePreviewColor = new Color [puzzlePiece.maskWidth * puzzlePiece.maskHeight];
for (int i = 0; i < piecePreviewColor.Length; i++)
{
piecePreviewColor[i] = Color.black;
}
puzzlePiece.ApplyMask(piecePreviewColor, ref puzzlePiece.texture);
return(puzzlePiece.texture);
}