VertexDataUtils.java 文件源码

/**
 * Gets the position for the element 'normal' in the elements list for use in LightUtil.pack/unpack for a given format.
 *
 * @param format The format.
 * @return The element position, -1 if it does not exist.
 */
public static int getNormalElement(VertexFormat format) {
    for (int e = 0; e < format.getElementCount(); e++) {
        if (format.getElement(e).getUsage() == EnumUsage.NORMAL) {
            return e;
        }
    }
    return -1;
}