CesiumGS / CesiumGS/cesium

Billboard `alignedAxis` points in wrong direction in 2D mode

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category - billboards type - bug
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Description

Found in this forum thread - [link](https://community.cesium.com/t/billboard-alignedaxis-in-2d-scenemode-head-to-wrong-direction/14024).

Sandcastle example: [link](https://sandcastle.cesium.com/#c=zZ1rj1vHkYb/CiEskNFGprqr+ipfsF47QBI4m2BtZLHrMRJqhpKIUOSA5Mh2DP33rTrkXE7X27OH8JcNkESieB52V1dXV1VX9/mw2M0+rJY/Lnezz2eb5Y+zr5b71e37+V+Hzy4un10Nf/9quzksVpvl7vLZ808vN5ebq+1mf5i9Wa/evjt8vTgs5Ok/fvvn/5jfLHb75cXlZjb85zff/3L5bL3dvF0dbq+Xl89efeKJ5lxd5BfyD4vD3eec58nnXOXTd0tl6ncpz5k+vuggOAJEcXwGwleEoHQGwiWEiJMJpRbYjxTOaQRE5HMQlBGinIOIEFHLGYjqAaJ6mo7wBBHnjKmHylk5n4HIaERqOEMW5JA46xn9oAAJ5YwZQkgUdNS3qQhKCPGrRSEfntEKmVAA4d05apEJIegctQgeIc6aqBXJgs5phUuoFWQb4c+yFkKokxGlVqRZFNMZiIgIKU8nlPpr21BigJKgMxAeIihOR+RcEMKdMR45oFb4ekYrUobancIZCEYd8dGfgXCwI3zGoEbcEeIzEB4ZCwcWwy4iIFG4coY0A7be+RwEoUnmktXvHoGhwXLAVnQJ0PA6PoMAO8HTnyekU0f3cRqBMnRLwHLeJSB9kNV8OsFj7+qMsfQROczARnQByBkQ12o6wUUoBjddDA62odQwlZBrxC47Tyd45GKWkCcTChrL4qc3IScYglWj01R7iIQRqZyB8MhHzZGnIyJyZ3y2Bv8JBBNCWKfqCQQMBLM/QxYhIdXOLpyBYNSKVM4Y1OCQLFI+oxWcICKeIU44IOmMNhBMD6RzhOkrGo9YzhhSj4YjZqvdpUtAgogxTic4KMsINLOHSBW5ZT7kNB1R0CLuA59B8Giei+c6HZFhRMyRpiMS7AeTPwMBZxjVM1oBFyBKdTohQOUmuwJR7iEYOQPArXqCwGg8gGZ2CYTiL+9DOgPh0CrmbTzcR3jcinNE4eH64QpNRzhCA+LidESsBSJCOQMBs2cOWKw+gtAEAXELpR6iVDioPp+BgDk8H85pRYKI7M9AwBGh6YBKSBLkz2hDhepNNL0VHd2keM4MKagV7M+wWAXKAq3o/fUY+7w0HVEczAK6M2LBCHMD7M/I4KGIeGwpvJvnnmNTI/LbKY+XwZjmEQOCc8j0Ux2bCVGQucs9RERpYW5ml4Rlc9cRZPAB7VnIkjBSS1mZ56kjiUCBwFiEJkPCJcw99RClAtsfKI06EqjOS68jzGg5D+PVPBSe+540AyNRhBJHPkUsNKeOUoXIaD8t0tjJS0Fa0bETAfoUMeXR7BLHXIxSh5AZpYWTKyNhFieN6CLg+pNonGopwc+phygBzXER50iaJUtHQgdRI5qj4oqPpFmzzNLOmEaHPBuxYCPVrJVl4nUI4oAgRBorlncU5q70GAklXHIdZxrEWapdexVP+0UNo4SxyRNHJc0r9xiMrL84Ck07Uu3aPdHlCPpSQ2ksp1qM2GMA5z3L+jjScXFVony1h0AhRHZ1PNO8BEeyWHQZbNfTLMFpGDNSX81laIMVaeY89pHElY5d6ydGHAyLEFKzEojx6rbDOZCgzTKFxmrKnue5O2UTQIjrM9YOrjLePbtxXIEbRHZuPLLRha6ih1jArM/FjSsjdEr1jY+uBpZR/Tjt4HOM89Jfk8CWkqZOxwyZPXPX64tMaSuPIg7UaLLI1I7S5q6jAfI4hRoNI98bVvG2QD94PF+JZUhi13clsDVWxAEaKZdEzrI09jy2kMD6XFLjvMq09n2fiwmEiCWHsRtOYt/nvuf3ndKiDaPE8Ya+zDUnKoAZVDNIwZdaxxuvYs9IpNRhFAYyrd6NoxJ2pc5jRzUIZWJk5R4TfKB5R6Akq5t1eSoH1yBqf66hLGOVSTzyFJjEVagdOyyBGLDlNXEcaTizL3Pf6YmvKIEt4+TymCG+cM9Z8LJ8gL5UGoclLMuo9LDDiMFsEJW5c6GO25FEvVJnqogOlGIZgcfJX66kiosZEhkkwCh+vD0ivnvujIuMVy1mfZQR8HVseUKMouahwwgxAEZsitTEW1TXFzPKyW43jJrH0z7KQt0JD4TBGbSD+DiDHhgSIHf8UT+sQckych7rekzinJeOTFN20bZDAo+xz5GcmEFXMSPK0keGIeqRxkFGKTIBMCKkUmwzIjVdEZMtq0KHwZnNQl00Ah5XfojcqZOPELcq12Sni3gRY2sszaodV9DPvaxlti+FmtyjqH7oRF0i6hJsMyr5sUGXeKfKpwjhZBYVE/tV8QzqOHIrEgKJX4YZpSSyDJnP47S2TohOckVDoRq9YYhE/WhoZaUpndnihgiJDUOM53hHsXJOnYSXEy01i1MVJ4fGRqwmL6tTxYgQczaIGH1sojevX8UIlgXASiOJiz/2SMVCu06SxM0pUA4GIiHgeCvtaYhXY2MgJeVxov4EQUqmyldN8CUfZpcqYETMEA0szcjotzNlspBOO3LgVlHly7KAIonA+Esgun0WDYRyU+BzhEArJBCJO8lCxNqPi8eOkNyBsJY2GUjQKN9CakeuxLnNCGq7JT40cvU48yIQCXpbb10gKfkIIMiKiI9kl23teqxW0WQ9SphRYgy2M1oWxhYCVxmvdjyS7YyosB0bwnZEIFEcwWYGy0+6yAVA4BohEAmlW9duGASy3SGZ2BjCYv7JQCSyp2Ah0KkSiDi7bbGjQDhQNd1hvKuuEOcKgIjPxxbCHZk4mSTVQCSG88VCOr1xYtTYMgpV0BAYCinExWwHRzxmO3HE8UZxnR/c9Gx7E10hBIkYUgqRlaspc1NIwO6q13RHKNlAMrNjC8FTR7NQ5iCAQmp1pjtxToQhMZi0us7WFD2A5E5LQvDtuiXq7cStM2qSOutWFtfBuWogvuRCFkIBQ0hCzWQgMnFStpDQ6Y6XtZgMJLhcQUtypztq9YKBiGNSjZ5knBzSUKW6YmWSTlshDQSmVQQiAmxzh2rBOFVvITDFJBANSmxLSmi29E6QjCGy0LUJajWD0ecIIAlDJHg2c4fF2IM1NM87vREz2MYlw36L52wZ3IGIVW9TTWqPE3MAkE5vPJttFLXHqU0wPylXxyY7IpCQagXdgRl3H8Vq1mxlEouvQK4VM4oP7cEiYSSxu6YhpePfiJVxxVlIcRSLhcD8m24KVOuc6MoAbL04IR5DJDz2rUiCGLBizXQnjhaIltJaiNf62BZSO6u5mG/gnIQ5RbbGsXb84CgCTwAiq3MGkFwwRLraZjh0ocvN/uURAgNhibFrcMaFDaprHjASZhQ2R+mEkUqtCMIYIp5MrQaSa7s3M0BKxRANUoKBVJmVBUA63ZEg1Ew/kXazI3tidHrDNbYHuHRPyTfplqd7QyUbB0f9ByqgN9hLEvUOkQyDkzMSiRJWdiTi2BnHUeZkdu12pkKwMdEZ78hCYirGvxEIzJfobliuRtWiLokFtCR0WpJi8MVAsgSQ1UJg3lcgEo0kO8IlVWIL6fRGVpxqG1KTWXFiL5DVPUZTe6yuXXbRtMNjgheTlgzBS0/i1GZoViia6avppqas/SSOgiFFzKLti0TqDJQV7jsJJEtoXwxElDUAqWbMiNWZ7IA6Tc3BjxPDY0iIoc3tCSSJswfULHfkGhx5K9fscpzO8GKgrUSKjA2YNNiLJt3RYKslNRUwvrA8w0sw463/m1VX0cTDLpYm9rORiEQKOTIYX5yn8FqjEy2EiniSwCxWDImU26Iw9S8lTuKp9tmLDUjtnpz6l5VtdCIrhccQcXWLFWySMA75E4whnqk9mRK0SiN55NlAwYp9qG0iOegeevBAJDjVKOYhkXFsdKvU5WQheLlRPc7twcqgKZCcvfUY8QrsxA6Yk3TqLjPZFG7Pd9VliNrTU/LtuzR1A4kdiCwUJiYvQyoUQLgD8eLXFQPR6ATIBBbACMT5wFYmsTgHglgoWCeKnLNZPYsWSLk4MU5yqshkwhMZhhooT4s/hRHtlQGDPlQPYi1oTZxulBhDX8VhBDncjEsdnMYbxaRfdTfJFSCRDkPGN9mGECUGDNcZGmm30bRhOymAONhBsYoAkzMrucqpZJCHgtlXpxOqmHhNt5SCDXAS9ikEEjUOMZCUAtWJKSSnsS239flqSIFPoW5CxhDKPtjuSGBLoDswS+F0VppgWtaW05LYMLCqaaGFb884D6tcsutWxE6F05ombjP9ut46srZE4g3GkFRMvaZA2AW7gRJwvOY0F3OcaGNISCByDB2t19SSuRkn6j5WjclmpFNHsGKOvBVsqg7lxmFls0BcMsWB6jI7bx0Cwg6BS5peibY71bPN3Ii3yxgiNrqZw9HLChptVpvmHURijpbhTVCg+eWAEaFw6yBFLfH0NmtDmCC2y+i717WzgG262pGor1xsM0JmtFHXGxaJwaoVh6yddmx9xxhJjFlLsZBUE3mwZdiB5GgOpgukaNxoIdApEYgY+TYmiCpBX4FMuGJIiMXoO+leFdpEhXVtAmFnzqMJROLGBAQLT2gIxIcEIKJpJpTW3VUICeIApzZDEYczSQlscceCIUV0jQxElM2DllCnJVo15A0kFrs/pmUJmBG5rfgRRCrZhEncKfnR2uHCZDujlrVYCLYCmhutreuqhWwuRg8gmKGnZ6ymaVGLEUiBB4Gcnhqwk4/FZ7IBOXdq0xzr2Qwzb3T/mM0M5oyTcgKJzpT9CCQ4X41YU2dsWFrIrdcZFX3UnBEk4sofPZhSUEuSt24nR5yUc1qVXdrqVoFkClZLQsdIawKJioXIAsJsITDB4PToVLAMMXQJMOAhEmVkc1pBIe3xpBOEMSSU2h4hj/LtVEsb3zB3giSt+G3dX2EQ1QwYcGva6f6xzxbCnGxvCBfbOi0MjclCQrBZV4GkDiS7DFoSk03+MHW8Tq9n7pKVq5gBk18QCJaJJjq43UGNuktg9i3Z460xYRQfTW90l4AyWwgspnaaoI7tqd047BKYcih2ePdFICHUNpUV1W2PXC0kYQZlIJAQ2uMkA4I6nXG1rYEQhgR8dr1xFlB1m8vsIgkgSe9aZ4JwIqxquVxo68uiOkxslhphhAoZml60jBLtJj3hNU8YeoOfHZMas1lqqMAyKGFoXW3bDnFDk88WQRghutdmN6JuD9jFijI8dlq1QC0Uy6Bkg0VhoMSTMHLMbBlsKxYoQf+7aogR2rryKGPF3jXikPUZS1S8WxvQ1OEG1WQRKPtV1bFnNohsysGSHlKMkCALdHtTiyL0JIdlEO4I1dqmwKMm5iqDdgTcE4nes+1KlaUyWQbKJFTdDKI2UZt0K9KkRZSBUkXCyLJ6kWHoVUTtWUmK0JAKI3qzJ5/UqDWX/B4ZyKILQ6PdbBhcwNhGuLMoDN/W+QlB/AZfLAGd46haj5zb/R5hxNjaQEWgWomiNrAm2xHRUTIDi0vAik4KQMilrRdWAnKUS5aojttDjkkLWKk5dS+MAl0GUcbAbNRLU/ix3VMUtw9m3YThRKGzZZyOQ4wYEYbtUZpXS2tGhUHEbT2qBPKw+FIYLGs6WUYyJbqpZrhDE7OsH6F11vUUjStmulWcvheGROzFypRDtX0psKJOGLIyedsXLu2Z4IGBloSo54dSm5NJmqwtiSwD7TYJIyTKth1BD65bBloTdD0tDPQjumB0XdZTj9qhtVaBbV+0UoEsI3jIYG8yocrIhUA7UNpA3GA9QFcMI/ngI5BHhIwYESKYYxxd9dCzP4XssKTig9VSpByyfhd2lpA9VzDhYoQMcImyMkKsFoGumdD0Qk3BCkNWFUYMgozkzI02wpB42aOuQITejGunvUwghEDhtWYHT3tADUMWe28HBZWvasI0cLu7pIzqXZw47cXrCDHZdqi3DBho312T8pGcnW5ifIwrWHHN2lBcYE4HKMPWvOQhXrSMoQjN6pfE99wCCCW1dEstBm/HVQ+DGgSjiaIblSG1pc1JtwFLG++IiYIJWN25lWYAhs9tOJxdhM0oek7b+E6CIDPZsibSgXYNkZRxnmQRC6lxiz1rZhz0hFT4pb3vQhnUXMV1YhTIiBTJMvSOiDKZ4UJu88hJ71PhpuBmYKB4h/RcQmg3yJXhUpMtEQbBLJReyZRNHX/Swwqp8cEGBuN2iIbZYQni+GeLQG4L6c6sByIN1JbbDYyUIYNr9pbB4vgRYATIcDm2eWhluOpBO1DWlTSV0IaQgiA9hwMkWiEiyAS3IvW1ZNAVZIr1oioqxXZFLB4aWeSRakznqb1RJel4t16tMGQ1zZChw9JquqxBua0/HBjIjA6X+ZhNQmX4diNZGAHuiWnAf9rLGzNKaHduhBFhzoa00p/aQoGk5z44B8uImKHF4YDhc8mWgQqQSY+DHO+HHjNSdNEwEtwP01tqgtnJEkYsjBi4GRScCXoEcTpK2iDQNvRwKYG56EEYYktDsQx0LkoP8odQ7NCyhPaGgQEcCllZSNQUzbSH/qieWo++PYUrCOLmBusjAgUrelw8uWxVw9tlBYd/eko7RW8VQyRcomWgEls9HJ0p2Z7ojq1hFFwhpH5PW/mcNLdpZVFwrljvWYntXo8i2ltMjwy4gz2URiXL0FcyZMuAdZPiMLjcHlpXhiugK3DfSovnjHs/rBLWaFR8UFyTAObeTGW49rzPwICFQXoRjGu3I5Imz5PVjYrLA/VKxOSsNPRST9AX3Az2dqkXBGdHQBxIvcTyV3OzS9JTRM1LGE6jEiFDuh0AgwIB5YDFSWpiItmh5dSWWRwZHjLUZ7ZzhX1bcNln6OEGU/IlDBKTVACDICNEjlbFvMRdCUyWBBn2fI4i2uM5xymLpn2Y602FthUaCueJpiPohpIVqPPeARsI6wolDhK3u11R9DSVnbKdW03FlTmdXhsjCvIVEi7D43licy+pMjS5ZhlQGqzHfY04NFsPpn3Eu7sswYO5/VEYYpOKtwxYKE0SH1Gx7UjUbq0cfSd4kckQDhtETMEqWOzcYCSrqXkjT9INkGLXptg5kaqrm7dDGxhoGHYl9YiCBLNkGHrLP3BpcUGEHnMoti9awA1ca1wqprcQR6vpLlOsloHLd8Q9N4eUlOEIhSsoIK566rTd2U1DWUYBURPc8tIj36YVPNemgbAcbRLJrDeRCg9LPYG4HrgLmmHyxltgVX0CYT3aZdIkaDXOrIxeafenBwTK1/z/QOiJDnOkKGnxUXt5pCDw9X7DrcPtWU1BSPhp1mjGaTyN/8k2glN7xcdAQJG0HmAyt7cnLefyJlWj91QB1UzDOVfbCiIXvEWglVGjKlM7kXRCVlctAl1HrMEIIDj1HSwB7aLq2cXg7HholRNbBMo4RXW7TIxDui1hbPhw0yhCBLFwFlGisVisaShE8Pb2GCHk0l5LMCDQPWWyCGe7d0C6hZpaY8G4YCHobTrtKZlEw63jxSICbAVTNOlMCe0jpWQR6CyV1iAEZ1shnk42rcAXk+heTCCLEG2zagHTw2IVvHlJjxJ8MqaXA4z2WO8PDBYhjpxtBKODoXo/hqlRTHqLpIutx6Z1cCidcW8gxwhRimIJDAnBmRpH3RQXX9J0w+N02Vzf3VINotRgMkxM+JaYodIyWYTLJiGiNXTIK9Bd5GB39zNZJ4kJRwO6Z1BtK5JJpOpwAN3WXRlzNEAAEuiYBJWWRwaEUEeoGMRdQV2DQNc7uSFraAicogONQNvHeu6GgSwlwKjeigLEqlpw49rC5qRFh+126VEzCRD4VATdEBybGEAUMwOAWKpo5eCcTYyzR4G/npIxdVFJj72QtRIO1TRpli4FWwVUfHtLwUBwiEC2LlsLX06X1j0mEHRJvMoBtCGd3tzQEEC5iZ6Rbu+j0gIgbl6icgSAw0w01KBagpoe0ASQ19crpAkUIbF3HhBQE2LhBOqxvG8nBcHUHGkUnG0LhhXCEixAbzKqzgpBz78aMcJSGdYpkWydnugjF0sAu0Wy7gU25x40GKoetAGUdLBeYF5tnZ8EqATaAKxL0O2cYmseY20rjI9t8IBAybz/UUuzajC7ZvhFNEFr4QGBa0yAABbOYasKjAXVaDKkWJISZJt76gXgT2XtrSDtYOq1P+Zt71pdVpPJXRF8L4RmDtsWlOHqDbbPgwxclEllXtAXtfwimISAEMAWqCa27UkrPXTNJj2iBNuHJBOInO2FvrOPAMEDApEp7YkaFlEGbQC7bOIss3kLpxAkVvLBEgJqQwITc6hfc4AAzvBokZ8xL0KgAnoR0UkxPRoUQRt8cWZrTLd7EUE0uk12Rd2zsQumbtQGQBAD1WbJtcqQq1m0tSA6A0KOwRzP1Hce2BymbrCiNmiJFRtCJjJxEjHaQNGLPs0dgVrnWMnsHxMB30VUx9vTDxpcRo4WADqhJXa5XfWjll/YFRc61MMl2tE2QTeGkiU4RKj2rbBRqwpCMAR4UFarhsxLrpRQ2PbCo9R61fvVihWDq9wea0uewePRXg6uj6uNHV1DXfS6aQKAbN8sH7WSwI+LRKrH70gYLsiIbS3UUKva5HJKHM76IILmxYoh5EjjHbAyXGxKiBCCeflGTMOLkEYjmaNet1IRIXG1B0dSc+FBqhmutkplly0gMo8vGUgc4eV0Xh3/3OaShnrdcVGtRJEJjaQf7poPVozBjetKhrcI4BYQmA96NUMZv707klagBETgWBCB09jpEAK851YIslKRlaMIt3nRmRJAYKfXFHlTjaaHb3JTPSra5dCk1q0IBxSawlifQ9HzwgU+X000oQBXx1naMBRPVETIuZBtgs9p7LcEPU6ZIaGk4K0UdCuExy++07P+UBv09KZVJ70C3DdvHAlzKMaawSEoV2vz4pQaUCmMXsHliremyZU83kWRgAq+oEgJ4Fz5UNNW7StkQIpYCeKngU6crEXzHpsKCbUAA+ti8/pAHq7hRwDx4zMABD8OBdhpaThBQjTJxDjc3TqeETLJArRueqWayXUogdx4VrLTkmcoSHJonRHnevzmB9aTeWCzUwlsz24nPYo+9puoapU9JkRzwY6eMKzNDQFU9SZOCCic7HnNWlzzQsqiRyoKIrBuL1hCbl4kTDnAIn0/vGfK3B+hGxFNokDUK3U0UrN9gBCbkt/hjVkeE4q5iUoJYnHS+L1dHNGBB9249vYMfdRdj/FI+OpQhK0AjgmcFm13kERDGW28KCHZK0G0oKp5IbNehIK1QZxwAlJwjRR80VgCaoN4b2z1qVTfVJbpWa0Cp3ZkD7ShyE+O2xD1pBa0kTEGcHI3t1kjfSse4U6k7OxQyhRo9iSDxqxQpePpJY/t6eHapI1YD2VAgqzY4FB4iaHZqeDOaqe7TOYVrUoIbbaD9NpdaF0SsweDefJMH8UCuTe1ZXWPVqEKZxOlO7SDpgT7+pThLYLFHsjszKtUkgOSFOelOTjj4TX2WtficgEET+Ma6aqn5aF1yZTAxBR3a3xMpOr5WAzQN74DgBvnjaqeMoHKIJEp2aHMtTnOXjIse1BAsitu1DT1eJdd31HrMSCbzaIBkMZTonh4jl0BhWIFgKYwMYtdYChEveAQyKDZ8Mp6sYjHz1ewyogXPg7q9JxOhYMgzl+1o5jTWAvkr7IWwOdljWLwfPOe+hTgHR5DA3KwS0zmcUCWhsWo04ECHm/KJGLNnVW2eF/ACFAcV/wOgIKHgAtogWdvW4CncnHeAiQKHi+RsXi4szOosQf3U9QmUyX+accc5ZitRUyFx1nHkCPKEQ3Pu2rHMOXavOKP4H1OgzECjycen5FgvduvY06j1UF5fJwVKDD5PKwIDpgBUeGxDgbXkb/GKRk9Pz7298TzsP2uqZV84vmc0e83ZQxPPQ8subSfpj4fK3p+LH59HIvfnMc/Pj32CZ56HPgUyTWlPU88nwt8voaJzxfg2yXvAk183mbLh+frRO0R7U3g+amDF8x50+PjZfLzBSifb1IgTzxPCT3f7OI98TyHiJ6f3P4A25/c1N83L2c+Ph/i1OdTQc+XOvX5iMYvj+OjJ9tf0fN18u8j7W9uS3jqcRDXJF/HFwH1Z0+wewPD87FOfZ49et7Ovt7z4OepqZt64vEE/L9Ejfv01PPABU7k/UTjE0wN9fH57CcOXy5A+4is8e09Xz16fqrxD7kg+TVvj33yedR/njx+uaDH01TtyRk2v6bJzyPxh0C/7vk8+Xm0dlKYunbaLdbj41O7X5DxOefnM27+1NGHS7c8P1V8lfDvTzV+lRN8furjof4q7en8PFD+H35zuZnJf55/erm53Ly53VwdVtvNbHF9/e+r9fr1drG7vng++0W/9O1ic3212B/Wy/n18mq92C0vHn9NCbOZ/vdqu9kfZofV++W3h+XNHzbfLuWT6/3s8xm7T48/d/rK9rBYP/yrfeJfZxdv1trerxeHxXy93Lw9vJt9MvPPR5j9YbE7yPNfLfer2/fzP96uV4uNPLGcv9lt3/9hvy3J+YvLZ+TIfeL4E1e/I37l3Svn/ufyWcva3kCUdPXUqovh916MWv9itln+aJ+6eH5H/7Ba/rjcza/W26t/zAfAd9Jb+aXhz/r5Rr6Nv7y9uf/u9uapr17d7nbLzQSySnq92izn/9xu33+3veuR8u+++fLl7Nub5fJ6dnszO7xbzm7Wi59fL67+MdsPn0b30xy04P3t+rC6Wa+WO2lAdI9YwxgpZLV5OwD3V0tpAOrwu+3t+vrLzeq9SFDVYne7HLTzhPpOHv528f5mvbz+y3a/Un2VP+22N8vd4Wftw265Pzb59K8zUdxBuaSb729mb7a72XJx9W62HyCzhU6f4YHd4nqxu/t4v9ytlvv5Y+W4A97/2OePh71p092XLp7fN15/+WK9PMxW8qT7VP7vs5nRb/n4t789TbmHn76WL/xlu9qonj888v3qh3v4IJuvjxNz6I32ePjJw7vVfrbaXK8+rK5vF+v7fotUBmnNVtIikdLQmQfllc9EYJuru0F6PLEnTpGVzGAzq//PudKK++HHvhKq/Gmx4WFqf718u1su9xf3wpnfW8IXs0cfnuzg48+OZvDhFwcV3Z4k96A4g2r8uBKrszrsH3Ro/uix3y/lqR+XajJHD+/l6bXMHmnoRkTx+vag/7xfzq4Wm9nr4fsyjxaH2e5288kg08X+NDTyqDB3y6vl6oN8R7sqoyMK+UEmyd1Pt8o4iH94/EJpL+6/8HykIqepJmZC/lH0W566+OVRd2bXy/3VbnWjT76a/f2b7dXi+MeLf/kFyPnji9no85Oom4+P0v74/O8vHv/SXQNf3f+p+Wd59NXsl9nN6qfl+tvVP5evZt69EOVYb3ev7lVC/zb/z999Pfv48PDHu4H9OF6T1pu30sJvVvvxNJq/X9xcfJh9/sXs+w+PVejDfX9+eD5/I3++n8tPSNH26m6ETr17fbdivnqY5GLr3kr3Lp/N5y+HP+9fHvv3t2+2b7d/28rAi+mc32zeXj67F9JCOiCm78ufVvtXj+fUX5diR1eHn/+6vBKVvrdDpjmDZX1+wn18cdf89c+6NDxq3EOf9q+enolf7naLny8epPz8xQPjx9X14d2rGT/6SA38brVYj1r/l1MDvl7s3/3p9IX7Pjxq0wwqwn//7ptv/vxfj37j40Mbjl0cdOOjDuPl5pFLIyP43Xa7fr3Y/Wm5ub34Xr96+rXD8qeDjs2XMsPvB+9+HEQqy7VI+tXs3nu6eGS+x57Uvb159MvvRA0HVQTu1H2j5X9/OCrfoydloVsOmtz+8N16uni/3C1Ec3/+/fb98sIdma3u7pbvRb++XK/vtfvly9Wb2cVJrtfLNzIa1xcyErvFSrVHlpHl7vnpp3Sm3nkV42/o0j3+5NO7B+w3bzen3/m0gR7dhLfr7Wt1O28O774TE/zl24UuTt8dMSqBxXq/PD0qY/tR/vjsxbPP9oef18sv7mT+b6v3N1vxQm536wuZZ4elGEtRsP3L17dX/1iKq7Tf30n9s5ePH/1Mls7Z6vrzy2dXg0y+Eosuv7vcXT6byXq738u/vLldDzbq8tkXn72U75tH19vFtfg+fz5OZf3aO//FN8cP5/P5Zy/lr/jJw1EvG/L/Ag)

At a cursory glance at the Cartesian3s returned by the `VelocityVectorProperty` I couldn't spot anything obvious going wrong in 2D mode vs 3D, but perhaps some of the math with the position properties is incorrect when not in 3D.

Screenshot from the above forum thread:
![image](https://user-images.githubusercontent.com/31491650/122125548-9af3fa80-cdfe-11eb-8b44-27820cedabe3.png)

Contributor guide

Open the contributing guide

Research direction

Open the linked Sandcastle example and compare the billboard's alignedAxis direction in 2D mode with the expected heading described in the forum thread. Trace the billboard alignment path from that reproduction, then verify that the direction is corrected specifically for 2D mode without regressing other scene modes.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript
Domain
computer-graphics
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
38/100

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