public void Zoom(Vector2 globalFocalPoint, float zoomLevel)
{
zoomLevel_ = zoomLevel;
float min = -3000;
float max = 3000;
float width = max - min;
float height = max - min;
float oldScale = gameLayer.scale;
float newScale = zoomLevel_;
Vector2 globalLayerZero = gameLayer.LocalToGlobal(Vector2.zero);
Vector2 globalLayerOriginBeforeScale = new Vector2(globalLayerZero.x + min * oldScale, globalLayerZero.y + min * oldScale);
Vector2 globalLayerOriginAfterScale = new Vector2(globalLayerZero.x + min * newScale, globalLayerZero.y + min * newScale);
Vector2 ratioOfFocusToOrigin = new Vector2((globalFocalPoint.x - globalLayerOriginBeforeScale.x) / (width * oldScale), (globalFocalPoint.y - globalLayerOriginBeforeScale.y) / (height * oldScale));
Vector2 globalFocusAfterScale = new Vector2(globalLayerOriginAfterScale.x + ratioOfFocusToOrigin.x * width * newScale, globalLayerOriginAfterScale.y + ratioOfFocusToOrigin.y * height * newScale);
Vector2 deltaPoint = new Vector2(globalFocalPoint.x - globalFocusAfterScale.x, globalFocalPoint.y - globalFocusAfterScale.y);
gameLayer.scale = newScale;
float newX = gameLayer.x + deltaPoint.x;
float newY = gameLayer.y + deltaPoint.y;
gameLayer.x = newX;
gameLayer.y = newY;
}
