Roger Travis questions

• How to check if VERTEX ARRAY is clockwise?
• google maps, how to disable marker icons from being dragged around?
• MediaPlayer throws illegalstateexception
• Incorrect table name, php/mysql
• how to use FFT to filter a 50Hz noise from a data array?
• VS2019 - some ToolBox components greyed out
• android 3d live wallpaper - what engine to use?
• Unable to resolve target 'android-8'
• need to loop through a PHP array in JavaScript
• Making a matrix for a smuge/wobble effet ( see pictures ) in Android

Roger Travis answers