Function getClosestObject

docs/app/js/sanddance-app.js:91987–92031

(_ref)

    pickedObjectIndex: -1
};
function getClosestObject(_ref) {
    var pickedColors = _ref.pickedColors, layers = _ref.layers, deviceX = _ref.deviceX, deviceY = _ref.deviceY, deviceRadius = _ref.deviceRadius, deviceRect = _ref.deviceRect;
    if (pickedColors) {
        var x = deviceRect.x, y = deviceRect.y, width = deviceRect.width, height = deviceRect.height;
        var minSquareDistanceToCenter = deviceRadius * deviceRadius;
        var closestPixelIndex = -1;
        var i = 0;
        for(var row = 0; row < height; row++){
            var dy = row + y - deviceY;
            var dy2 = dy * dy;
            if (dy2 > minSquareDistanceToCenter) i += 4 * width;
            else for(var col = 0; col < width; col++){
                var pickedLayerIndex = pickedColors[i + 3] - 1;
                if (pickedLayerIndex >= 0) {
                    var dx = col + x - deviceX;
                    var d2 = dx * dx + dy2;
                    if (d2 <= minSquareDistanceToCenter) {
                        minSquareDistanceToCenter = d2;
                        closestPixelIndex = i;
                    }
                }
                i += 4;
            }
        }
        if (closestPixelIndex >= 0) {
            var _pickedLayerIndex = pickedColors[closestPixelIndex + 3] - 1;
            var pickedColor = pickedColors.slice(closestPixelIndex, closestPixelIndex + 4);
            var pickedLayer = layers[_pickedLayerIndex];
            if (pickedLayer) {
                var pickedObjectIndex = pickedLayer.decodePickingColor(pickedColor);
                var _dy = Math.floor(closestPixelIndex / 4 / width);
                var _dx = closestPixelIndex / 4 - _dy * width;
                return {
                    pickedColor: pickedColor,
                    pickedLayer: pickedLayer,
                    pickedObjectIndex: pickedObjectIndex,
                    pickedX: x + _dx,
                    pickedY: y + _dy
                };
            }
            (0, _logDefault.default).error("Picked non-existent layer. Is picking buffer corrupt?")();
        }
    }
    return NO_PICKED_OBJECT;
}
function getUniqueObjects(_ref2) {
    var pickedColors = _ref2.pickedColors, layers = _ref2.layers;
    var uniqueColors = new Map();