Re: anyone know how ICE "get closest location" actually works under the hood?

[Steven Caron]

I am not suggesting you copy it... read the comments and treat it as a
guide as how to make your own. Jerome left really detailed comments!

On Mon, Mar 30, 2020 at 6:47 PM Ben Paschke  wrote:

> Oh man! I would if I could!!
>
>
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Re: anyone know how ICE "get closest location" actually works under the hood?

[Ben Paschke]

Oh man! I would if I could!!

- Original Message -
> From: "Steven Caron" 
> To: "Official Softimage Users Mailing, List. 
> https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78rjo3fW-2BI05z8hPddj-2BYSrjut8V8Kr3SyUl8pLj-2FCGT-2FDhxNh9a-2B87fHsQzXGv8Z96f6mCYq4LnbYGm0CnG0VhKkoPOlH1i65L7uusvYX29FBW1E5Fbt4zIDiv31Gl3tCPY9OhPc88qeP2gNYzOXnnzB3FVNAPzUrtN-2BzEghymRk2sSrXRWJUad1U5lnS-2FD3IKM-2BojGZoBlhf1sr1vtKy0S8LUFa7bb68OOW7wGiO-2BDVEW93ThOd3V-2F49yRtaCqybKsLO7masimGJW-2BMoOhC5kcz-2BZrRpUUPqlmOjDnzNDBgBQxkY3pfZywnVeCn5oabmARpemGffpqmlJcxSDctgsF21Q8ram4DuE0TvQONxocF5P9JzqcTdPEP7nqH6awnKeA-3D-3DoJy__x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fTRFAU6I8LzpsLwlCpOCJX7DT6lNl0YyWQSNgY-2FQbiXTIoIUdsEnuY3W9hKzT49rdWsy5UX-2FujHWg95uHm6pTJgmNUoULN-2BhTnzvxSxuOoReAnhRaaD1AFmAKEwkw7ZMdKQdtoJkWfIzwYRJEBIWDFm0Kc3C3DBD0HsVIf70F-2FsH6-2BIgfrrc9ajVhoYyZA7-2BMGqzo-2FGT4Jz9aEiiHQYf-2Bi7
>  "
> 
> Sent: Tuesday, 31 March, 2020 11:44:40 AM
> Subject: Re: anyone know how ICE "get closest location" actually works under  
> the hood?

> oh, if we are going that route I would look up the FabricEngine implementation
> as a guide/hint since it was written by the same person who maintained much of
> the Softimage implementation.
> 
> 
> 
> On Mon, Mar 30, 2020 at 5:48 PM Ben Paschke < [ mailto:ben.pasc...@rsp.com.au 
> |
> ben.pasc...@rsp.com.au ] > wrote:
> 
> 
> Just for ideas, maybe you could check out blender source code for the
> implementation of their closest_point_on_mesh function?
> Possibly in here somewhere: [
> https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78riS8c7imIC4PYtRuv4xtaUFosZVsJb0-2F1opeLvVTOx0OZlPeGw4CGihmP5t3Y5i0exqRMrE0P2ejgnahdoEMl0M8sbUIO2FrIhd9hWiB6IYz-2BEJLf1k3vKyuB0fLMi6mMfQ5mHM4KSEx6lnOh6A5ZOBLYJGMFXyDJ-2BxZWjD0e3fNzvt-2F2YCN4lp2n8sVKwxCPIua0pbSL4e6k2-2Bvao1w9hd4abf-2BJrHq15qZdNECvEcxG-2BV5bkFBaL54zCP0IKey0DEwBakBf-2Bvw-2FleOsDa70H0LptCqva8vKtGlyEUSl658Qx-2FQ8oU9tQrpnaQWTgqR8Te16TYL4zaw3sTdYf4wKEISClYwXLm2p565bJK8vdO9Bx7UaRkXXWePUhvsvij8owXrpBgdIm7kfcYFzGY-2BlHvICsvu-2Flzq2a7k5YQ2Z0qKaqLAF4sNELc0qOaqWE5AD3AGqONYXqOdaQrunW00QFv4DqEA8tx1Y9eQbyx0EBW3f2mICcx-2Fsv4uFKXBscFVUjaU8OA4vP7ZiDew43u7-2BYDRGgvNzmll1QqMy7T2kgdQeNE4JMl2WSipdRDNS3NmgLsPdoVzIJlwytXmYhbSz99a-2FXSFjX5vhQXeE6C1CC9YMoF-2FwYxYvjvmR4v-2FbCLu1BwZivDP9PNC2WCW-2B0JvBEG5n8OOAIbT48w6t3aoRxG-2Fda527iRCE4CmwiwuP4eRI2kL7xm-2F4bUPlcLjxUv2i8MFcx8rDaKjx8PCsMdSp8nNbLxab-2F7e56CwHJNnXUWcRB2k4uj1vf70p2-2BJSNDxD94ZF30S2dlei5DePBDa2RlsJ7YgpohPhgngg-2FkXHn5lcl7JXRC8x3TSehSccIeUz38PzjYTvoh1xEesmqvcZw2sDSPZ2OaekGVDkkTLj2VhPc1sNWtHkG6jQEK7OaCelGg-2Fc2qnCfaILuAwPm0jvuwOlKeFDshNzB5EzZv8uQdthJZpC6GIr7hKgzZlE8Fm5jyz7xEuHjAWCk0Ec3sHgyo5NvKAHWeKnl5PfW6oL7MC7NFFc80b22V8-2BR6muQuoVJz5gPq1dC8ZlPMCQK-2FDf-2FGkNMGW0PdJuNkxWjFmSuTemwHG1btIJjKHG77-2FkU9C7s3eTwfHrlUkSzz-2BJC0GXofVXwmDsNu6oDS3tVWUPmykYrP6wgfAEEdKbZ8HOqka4J74obGCNyM-2BpEuTIS-2BbsIDLNUjJ1viYR-2BqO30zcADb5s8NDJI7muzG3qw0OfeOZ-2Bx91Y-2FUJH9Qo8WRIQMP1mF7rgMJml-2BHK-2B9Zdf55hvCvxPKoMq8pEfkEHa99PG8-2FSvPLRGw-2FxYrbG9aFJVdodL3jBg4N5Gvd5JHwAhwEaP-2F8FYP7LEUEC3HpZWysRtoScaK20opwYa2FrCRvzeKLyQii1Aj4cGl3lIBXKmhxRnjOwg0kEOEy-2B5sDPbUd9sTbNhbWmq5mK8yQ5Xsyys59wbCD8vUjWuAmXkvPdyQ9njZJ8bgzcQDW7W5tyNl-2FbVVmtDXH1zA93Psixu-2BHmgraAM9-2F7if-2FhMOHk6FjvfJFt9eonmJwHu2ASV9ToW-2F7e0-2FSNkVm6ESwlFKliTgwkLaAnKMrX9m08dEK4-2FuQp4LzEXRHVHWpIuYZxGQ6UH5dnydalhgtP7EicD9GCDf-2F1oV8nHUY7bFA8iyOkmmU-2B8bzuRq0fbDzGSgTHMIxRbcJ4Zcd5bgfFyy4KuqiO870ZeHqx8Qs7SMQe6T1jaSvcLViFdpJzmfPGHd2X-2Fof8upd6l-2BuFeXkb1e63CLjsZng2pbWUpw8wM0wHv4AgGoaejfvZB7V0k5qro6WNixJ7y7ikmMFVGEU847EMhNRiy63VNipnZ-2BxPUlfRrLIk62fvrx3Y6IzzXfKM-2BsNLXEtCs-2FaNvnyPqUSFsLHGYeKnYGOLCLGzWoNjYCc1whAtY3NNb77cLVyuO9Ef25IiSxrAlsbCkoMc3xAO35Skf6GtN2fwNlQId-2FkLHkpWNxRHdyNgCePeaOxnmyLvJKtmGTL8fA0-2FXVj9cSd5-2F9GIyk7Vz-2F3W9YbguPPPlI993nm3KONdQNH31KMlekqhmlxNJ4hyHhBtxPqyVWUU-2BrbQwP0KzsB6CUll3ABRwAofiu6h1It3LCTKV9EbKJQ3hUmGsq19vU0jus60f9oJANtSeTVj7vNI2xBcUVE50Tj7akkqIf5DxBKA9icdSiyEzVW1GXe5svm8wPGES-2FZ1Rz83VlNbKxsbZPTqx7s7gKw3ADHRtdyw4KTfH0e7-2F0jGtW92XtJ-2BvpzJRCoxpvbMQNIdX1pt2YYoj0oR4AwkO9HGEdrcQkCDgAsez5yeRvELWps-2FoO-2F8B0Z9mMi-2B7yVnHkrDEjR0tWCC-2B8JhVHRHG0WbFt4kkXVwL5LOUYfLk1NCOdEp86bY6-2BbZkS2w0cR-2BPOcu38cvUDRtIgN3UReeVoNkrDGUr55gdCiqTlGgl8Qkgf4Ca1f0bNHWyizPX-2BfAAbj6yaRpfkDvLW7jMRjD-2B9-2FeILvX3T4IRiO6Ch0nPPgHyJ3hWeakuL6tdywPo4IDjBAZxPU4cmULrJEhQV9JtkUOa1R2iz6D0rBNzYlPTg-3D-3DBrb4_x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fTRFAU6I8LzpsLwlCpOCJX7DT6lNl0YyWQSNgY-2FQbiXTObqvGAGoSTYYI3ch6SXJynK8T0ZFG4XWRCLPTvQJbCuUwANZNXSmKD7tdz03gZHMQ6RV9B0v5R2tfaNaZV-2Bcb1QwRW6WXWiWQROZ-2BVAdC9o5Wqr6UtJAAaCNHha15vN0ZkyFR36vqYIkxduP5O6kCxA54mcnhdYtQ-2Fk8KQDqNj4
> |
> 

Re: anyone know how ICE "get closest location" actually works under the hood?

[Steven Caron]

oh, if we are going that route I would look up the FabricEngine
implementation as a guide/hint since it was written by the same person who
maintained much of the Softimage implementation.

[image: image.png]

On Mon, Mar 30, 2020 at 5:48 PM Ben Paschke  wrote:

> Just for ideas, maybe you could check out blender source code for the
> implementation of their closest_point_on_mesh function?
> Possibly in here somewhere:
> https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78rjo3fW-2BI05z8hPddj-2BYSrjut8V8Kr3SyUl8pLj-2FCGT-2FDLSRVI-2BJtA9WEfSslUfvcKBeq39MM4UMlr8qjXGeMzyr5eAItyf4Oswqj13ZSv0cLHuzjn15e9cCpEDuWPypLX5rk3XswSPY7xwhJo-2F-2BGiTa9A7vzluNJre-2FXSZcqIp3Rf9Wi6Ac5vQF1My2TGVmPNwV66ZOEDDFbHB3C30xnZAwwmIfMNcyLH4wMCGmvfqm3EDEkRre9g54WjLDeuCn6OOt-2FXDOJkuI9UvjaGL-2BkRVQV6qTSDC4wFda4keUNRp1x4Qk4cat-2B-2BhwrTccd9-2FE3iJ7SmXBi9T26ynP-2FbrB0IRZR1-2BngYfhXqgfRziI3tc-2BTI4dOdfrligYSuR9kQviOIiEmD8Zwa0-2B0JjYuJE4cGPsxTZjWq8-2FZTA3hXksWePy8B8hL4JmGAwVmJJTzIO8NjCes8C9XQl4YMvA2xICHQDTilqSnT-2FoI4Act1VRcCyQEAhrV1g7D5A5iIqsimj6h70kZVsHqbjZuCt4t7nN8A7NICUOxIl0RzZkDrJXAQNBtp-2Buaz1wAFBzclQ-2BN8EOp3srGxj07-2FBepUTNWMcy9UeYgOFK1Evad-2FZ7T5Mmuv04W3S4KbM2DoDCqlETLRBs36qdDKeoTIPP9-2Bl2pNR6TmGdEB-2B75tuI7jXFKqDuR0-2FggoIPyGD-2FInVBu3UxBEW7-2FRS27IuGI31bH4y5-2FtQCKLpFUapOEs14BbRSPA583jLC365bemt5fc8WlO-2BZLGw0gRpH4A7J3Z4-2BmjWZEX0Ig7D8LFtOVMwsmLUDCCZR-2BaBogw-2FKPGI8WNMjO7k6U1Ksd9sz-2F-2BMSu8TFww40mp-2FUcVa-2FtmeupDz0MlvWKgre3vrJ5TLIkULGlONDivKAceq3AMq2SwfpbUrTxlM-2F5rmpT-2FEXSenbfQrlFGcHAHYrslSckLupqSK3T2CB5kcdrDIS8Zn5sD1FtlXbqo0lVZmgxdlvHXNd6bxYgqO2SqRP0RsX-2BhK4QV1l19jTA0234Y5CioK-2BNmd-2B8cPeItY81ar0Wf-2FYaPbaZW-2BkGr-2BW247riHk6pQvXHU5yQYE5TKbS9RyLW0Ox0WUQuW6akc0fwplII34R-2BQ-2FRGqH3Fkak9O2GAwZDazO5yEIc9S5aTi9z8MnQUL-2BBql5OGhjb9bgo4hYEsMQpRgpI-2FI9bXqjARU3jbsbNImhYRNw0H0GHskKzhe917Td5dD8uHcMgczk4fCdHb8AlR6f57-2Fc0t3capxzM-2BE53aypkD6uVC6-2B8CCzX31gc2It2W1SzvK-2FpRrg3yDHYrS9AAZE8EemF4k1QkS7IGPCGf9lUEwdvmUwkBsLFlf7LFPnsjbmJMWTyeCdBLPT5bmICAtkARJY9U1nBvVCQSB5IlbFYFedEE1-2BQlqimdbaybFhtEs9-2FeMl2zEzIX5dpeHW-2FFQAThbRM0AEsBndhT0hX3jvq59-2BLwNGAJkaRv8y4-2F4g-3D-3DE9vW_x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fSoNzffEIRFaNX7xN-2FSHeTW2-2B4J6T5HMCGvNJXyN1RXnAhkn0kdYMmMaPXS3aSJy7coN9ZZ6k9ZCfhDGUD95VC-2BsRKB9q2s9J-2F3xuJrej8FsWs3fRGjEAF4vVYTtEyXnjJwhtvMYrL4uzI-2BdRblZyMyO-2FdlWpyyXJbX0BhCfWkQn0o2BpXcomwAX7TyM6acQeM-3D
>  
>
> - Original Message -
> > From: "Ed Manning" 
> > To: "Official Softimage Users Mailing, List.
> https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78rjo3fW-2BI05z8hPddj-2BYSrjut8V8Kr3SyUl8pLj-2FCGT-2FDLSRVI-2BJtA9WEfSslUfvcKBeq39MM4UMlr8qjXGeMzyr5eAItyf4Oswqj13ZSv0cLHuzjn15e9cCpEDuWPypLX5rk3XswSPY7xwhJo-2F-2BGiTa9A7vzluNJre-2FXSZcqIp3Rf9Wi6Ac5vQF1My2TGVmPNwV66ZOEDDFbHB3C30xnZAyiTe15sWUjPYkXp1VQ4WGwqX638JLcxeVhFTTYABOFp84KFuZTzynZP3oBp8-2F9HhwkheDIKBc2o2j9jL4YMwKNi1OyZTe7fVsk3pAMWaFnqhDUyyblcB0JgQR6LCnnSpDgCElpzNLyazcidH3sXuEpDirBtLN5blTfssLfpQX9mUepTLn4Mfs9PWOs9DEe7gl8Zulk4F0WRsTcgrhE6LZoFmezLmfnrni8f6WVZGV4Nwg1fL51D4Q58ZpTSLfenXVx-2FLQ5eKgeYgA7eqrJBDZGpuhvNTf48k5E3TcDgCl71xy5vFX-2BLNwIbq1XP0fl6PE7FBiBFcIoJMxzKi9PbVsQtT3xj6W5COAJkkVoRHjdNtp8bQ2v9YMnLARYF8vtn50uRDot9oe1ink929La9dbyyYliBGEC7MF0HlJfqmAJHS-2FfmOTHDe1bm5Po12x18QwJ6dHVW7Oxbi5TxO8trooBf9ZXgMRH-2Fev3wntM6ySHVPnr4xDcr0-2B6DUxfAPNvM-2FbJA65phHzy-2B0D0H8ejptj94qfxuvEqauJ5AZXrSgz8cVQIz19on0dnxSCaxoj6avUoQhOLZ67Hr2vcl7fPRldyE-2Fb8j68QyF5TvUTXYMhjccNgku5Qyb-2F59o-2FjSjEfo1tNqsL-2BGVQD9kLJSSlR8Q-2FDsy3qQe3Tg2OTio9LYdNlT1DniXOAMkSyrqU-2Bs7T8JZoUO4LiFlLpzv5WRiOPcCi11Ksx0YSAI6hnRcT5gUBpkCh7zjrJ0-2BraVSqyrptjsbkcAIlVxldoyYQha0nvofBs5qI56mYHOSYIma-2Bcwb4SFxwsGVmzr4zYFzEqEVgfDa3abtWMuMK8fhX1VxcGatj29xQ4u-2FniHU3VZoIQwsg2FHYgylqj-2B9BZecuCbzL0vJYnLmcCHvXtquqI1-2Fj2PX4FvByUXL1B5mrEs5ygTWhjzjYSgyswfHG229U1wpw-2Bnr2hPA4EZcDtmNvplSkHlhkbrT18aow0EBn-2FmzY6vZUWmeInE3gL7IfDsxEQlo7N-2FCK6ff8KgtDAbZk8-2F424J-2BNgeDHAFpypoIL77F8CNDv8mSv-2BQ7m7le7ZOKPOZqN2NVdKm4zDqffDIOWgNaBoUB-2Fc20onN1LRAI-2FQ1POMLQOAIQ-3D-3Dhfdh_x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fSoNzffEIRFaNX7xN-2FSHeTW2-2B4J6T5HMCGvNJXyN1RXnOgVpGW28av3Cp1U3KaQzTO6KjeXdLemyVoKq4A2eb-2BE6SV0cK97Dh0sVNjI5XP3xJor-2FjwyBIwkfiMfOSN1Rt-2BvAtwAZGjvFpw-2B6Lfc3LDL5bNvHi7-2BXms3Tuvu2hV4AH38sX4EDV3PTtmNVhOyP-2Fs-3D
>  
> "
> > 
> > Sent: Monday, 30 March, 2020 12:13:06 PM
> > Subject: anyone know how ICE "get closest location" actually works under
> the  hood?
>
> > need to reverse-engineer it in c++
> >
> > thanks!
> >
> >
> >
> > --
> > Softimage Mailing List.
> > To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
> with
> > "unsubscribe" in the subject, and reply to confirm.
>
> --
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> with "unsubscribe" in the subject, and reply to confirm.
>
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Re: anyone know how ICE "get closest location" actually works under the hood?

[Ben Paschke]

Just for ideas, maybe you could check out blender source code for the 
implementation of their closest_point_on_mesh function?
Possibly in here somewhere: 
https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78rjo3fW-2BI05z8hPddj-2BYSrjut8V8Kr3SyUl8pLj-2FCGT-2FDeNKab7qfuyVCb3REukB7uOLzA5famBZ-2B-2F8zifufqpDPuQ7wQLjRylwsiJRsu59ZGmY-2B1E-2F0Fmg51M2sa35sxukGSO3EjQaY-2BBx42JE-2Fp-2F8AvZjIxx-2BiLvNnYzTcpSFKM1lo0SlbQq6EZsnDNfmf9Pz2GB2xb-2FJyU367clFaW7LGa0vi9RVBFToNbK71QlFYG2Af6DuYKQ5CxDsfL-2FI3MY5l7kJ8dT0K8f1HwIjBCT-2Fls0aWQT0a6cOZrjligXWxqbPTcy-2FpKPd4ABsuOWI5BGMi2mTMT1kTDc-2BDXE0ybHYRSip8006Vh2VbhYL2TxAqU-2BNNDld6iqJJqAfb7rZQ-2BQmtKltTV4kWSPvrL1N4zC9gXUIYWXehOrmzeoiwE9-2BhzYl-2Fjuw74Wus5jmgEimpNoQ-3D-3DH2VV_x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fRjhCTUBdu-2F0zyafUDoOOGPVOqpBDJpKKHFfy1c-2FFsexjxhOrVa19bbVt3mqQpfKvnjbSnsL0JjiDkQgB1kYeShQG4Zp6krwG518O6z0u8tO-2FbugBLZhMiRvOfovqVQoajfXhLSJ3ayUZ6sjnGLewttpuUEcTi9b0tXwKBDz6Ru-2FJJjMMKLDLzE73h7-2F-2Becc4Q-3D
 

- Original Message -
> From: "Ed Manning" 
> To: "Official Softimage Users Mailing, List. 
> https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78rjo3fW-2BI05z8hPddj-2BYSrjut8V8Kr3SyUl8pLj-2FCGT-2FDhxNh9a-2B87fHsQzXGv8Z96f6mCYq4LnbYGm0CnG0VhKkoPOlH1i65L7uusvYX29FBW1E5Fbt4zIDiv31Gl3tCPc7MMAFxQdvlA-2B8oPuiN0YJ5ex7QUoMLMl91MxxwPVf7Hb4weiIZSgW5qmpRWDqxw0SyQzqiDgOD5U8PMABjZu7t8VEQqXUG0BWQ2j1BxboQtsPNJHucCv388qyiL5lOD6-2Bd6zVbD-2BGWRIalt4mhRf0avwipYdRF3HAZn8C7cOIgWi8vVzRp7o6BFPY3-2BX5JJBi6RIxvnyAkbSwkDIcBIULTfQu57FpOLT9ypd-2BcAmN55I1F9wPbb18-2BD-2FWmGuY7Uw-3D-3DgH4J_x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fRjhCTUBdu-2F0zyafUDoOOGPVOqpBDJpKKHFfy1c-2FFsexiccuqKa5XalG3y2nHuAhUz4JXxx5ZrI4OnIcPb6eKxFAaazA-2BlDtFVao0MgNHdIjmcVXXl6MNEA-2F-2Fm0c0qx0Ok-2BvhycxFz0I9yXM29QDQU4s9WjMiB2HRbfwqofrFvGNVlYIkqRKYEzBa6IyTQLsQU-3D
>  "
> 
> Sent: Monday, 30 March, 2020 12:13:06 PM
> Subject: anyone know how ICE "get closest location" actually works under the  
> hood?

> need to reverse-engineer it in c++
> 
> thanks!
> 
> 
> 
> --
> Softimage Mailing List.
> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com with
> "unsubscribe" in the subject, and reply to confirm.

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Re: anyone know how ICE "get closest location" actually works

[Matt Lind]

'Get closest Locations' is patent protected, so you won't be able to do 
anything commercial from the algorithm as implemented (but you may be able 
to find it's description at the patent office).

I spoke with the author of that tool at great length a few years ago as I 
had questions about certain behaviors (bugs).  He said the patented part of 
importance is the acceleration structures, which is a tree to store results 
of the searches.  The benefits come from making certain assumptions about 
when the tree needs to be updated in order to avoid unnecessary computation.

Location finding on meshes is basic linear algebra.  You can derive it 
yourself using the following:

- distance equation (Pythagorean)
- the plane equation
- point inside a triangle
- projections
- vector dot product (aka inner scalar product)
- vector cross product
- determinant
- linear transformations
- fundamental understanding of barycentric coordinates.

For example, finding closest vertex is no more complicated than iterating 
through all the vertices of the mesh and computing the Pythagorean distance 
(d = sqrt( x^2 + y^2 + z^2) ), then choosing the vertex with the smallest 
value of d.  If you want closest location, the computation is a bit more 
involved, but same general principle.  In either case, you need to make sure 
the origin of your search is in the same coordinate space as your mesh. 
That's where linear transformations and projections come into play.

Brute force techniques are accurate and easy to implement, but perform 
slowly.  That may be adequate for situations where performance is not 
critical such as a pick session.  However, If you want speed, you'll need a 
more intelligent method to search only the parts of the mesh which are 
likely to produce the desired result.  That can get complex really fast 
depending on your situation.

I can't speak too much about implementation on a GPU other than to say you 
have to organize your data and algorithm to consider race conditions and 
other usual issues of multi-threaded environments.

Matt



Date: Sun, 29 Mar 2020 21:41:31 -0400
From: Ed Manning 
Subject: anyone know how ICE "get closest location" actually works
under the hood?
To: "Softimage Users Mailing List." 

need to reverse-engineer it in c++

thanks!



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Softimage Mailing List.
To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com with 
"unsubscribe" in the subject, and reply to confirm.

Re: freelance work

[Tekano Bob]

same here,  have had upcoming contracts cancelled and newer ones seem to
have dried , will be same for everyone and competition will only increase.
Us Freelance folks in UK  on PAYE short term contracts will end up with
zero support from government so we have no choice but to find new work or
out on the streets! Im taking George Osborne out and perhaps Boris also if
it comes to that for me :P




On Mon, 30 Mar 2020 at 14:55, Chris Marshall 
wrote:

> Hey thanks guys. I'm pretty solid on After Effects as there's been more
> call for that kind of work generally over the last few years, so have also
> picked up some C4D skills as the result of that.
> It's going to be a weird few months absolutely.
>
>
> On Mon, 30 Mar 2020 at 14:13, Matt Morris  wrote:
>
>> Hey Chris,
>> I'm thanking my lucky stars that I'm on a slightly longer schedule show,
>> rigging/anim in maya - but things are definitely slowing down out there.
>> Will hit hard in a couple of months when there are no productions left to
>> need vfx. I'm really hoping that full animation is seen as a decent
>> alternative, and there is enough work around to keep everyone from the wolf
>> at the door.
>> Good luck,
>> Matt
>>
>>
>> On Mon, 30 Mar 2020 at 13:52, patrick nethercoat <
>> patr...@brandtanim.co.uk> wrote:
>>
>>> Hey Chris,
>>>
>>> Times are weird, for sure. I've had a number of jobs disappearing. The
>>> work I've got is design and 2d stuff, and a fair amount of pitching, and
>>> the rates are not great, but it's work at least.
>>> I am seeing job calls still, so there is stuff happening, but as the
>>> post work gets finished where's the new production going to come from?
>>>
>>> Good luck everyone.
>>>
>>> Patrick
>>>
>>> 07717 38 39 40
>>> www.nethercoat.uk
>>> 

Re: freelance work

[Chris Marshall]

Hey thanks guys. I'm pretty solid on After Effects as there's been more
call for that kind of work generally over the last few years, so have also
picked up some C4D skills as the result of that.
It's going to be a weird few months absolutely.


On Mon, 30 Mar 2020 at 14:13, Matt Morris  wrote:

> Hey Chris,
> I'm thanking my lucky stars that I'm on a slightly longer schedule show,
> rigging/anim in maya - but things are definitely slowing down out there.
> Will hit hard in a couple of months when there are no productions left to
> need vfx. I'm really hoping that full animation is seen as a decent
> alternative, and there is enough work around to keep everyone from the wolf
> at the door.
> Good luck,
> Matt
>
>
> On Mon, 30 Mar 2020 at 13:52, patrick nethercoat 
> wrote:
>
>> Hey Chris,
>>
>> Times are weird, for sure. I've had a number of jobs disappearing. The
>> work I've got is design and 2d stuff, and a fair amount of pitching, and
>> the rates are not great, but it's work at least.
>> I am seeing job calls still, so there is stuff happening, but as the post
>> work gets finished where's the new production going to come from?
>>
>> Good luck everyone.
>>
>> Patrick
>>
>> 07717 38 39 40
>> https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78rjo3fW-2BI05z8hPddj-2BYSrjut8V8Kr3SyUl8pLj-2FCGT-2FDPGdYFuSQLHhkvggY1PfxbbC5qsYNw-2Fv8xjog5fxGL8dqr7rk1Ge2aA8dH8bWtXKvKeOn8m-2FKmSdSXPGDBQ5VhwqlpGOysZQ0RtMFEHwylb7OOJR9Kw2ATCyYvR53I2V5IaH6lcY94bhcSOB6VF5mnbkrXGWfZimYeTlhJOyKs0DiDVtin4Cc6j4z0V4jiag6y-2BW9Bv5Hz8x2HRaBEj5H6YEG1yVBV98eE12NGAW-2FcbUPFkes5SJfFppr6Pcy0Er5Ai2ovHrSCkrrPGo0rbGJ4HMii0tPToriYmIAzeR5G-2BTlxlJx-2BgPNxjOoCKxS-2BsAISRo8_x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fSLyBlWvuPdjdDRn2N6oc1Ke0B-2BjHm9Ly8IdKvmxmQrFy6ZDnOT1a2EJi1g42AeV8zTLhXNgn-2FNU-2BGcxOLNKgvWSQJGK4WONVxuAK1qpXp27gHdWeEAp-2FtiFG-2BgZZXl-2FAGZF1zGJRxDJIjq-2FXT97FZBID-2FOBCqWyS1mqD7mhkWAUKy4x56M9pB0QH48J05t1bkKFlVepuacLHhR8cGoNYMy
>>  
>> 
>> 

Re: anyone know how ICE "get closest location" actually works under the hood?

[Ed Manning]

touchdesigner. Should have mentioned we need it run on the GPU.

On Mon, Mar 30, 2020 at 1:06 AM Steven Caron  wrote:

> I don't know the exact implementation but generally speaking they are
> spatial queries backed by some sort of an acceleration structure with some
> barycentric coordinates to get a polygon position/location. Assuming your
> mesh data structure has attributes to interpolate you can do that with the
> weights I believe.
>
> Are you reverse-engineering in Softimage or another program?
>
> On Sun, Mar 29, 2020 at 6:42 PM Ed Manning  wrote:
>
>> need to reverse-engineer it in c++
>>
>> thanks!
>>
>>
>> --
>> Softimage Mailing List.
>> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
>> with "unsubscribe" in the subject, and reply to confirm.
>>
> --
> Softimage Mailing List.
> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
> with "unsubscribe" in the subject, and reply to confirm.
>
--
Softimage Mailing List.
To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com with 
"unsubscribe" in the subject, and reply to confirm.

Re: freelance work

[Matt Morris]

Hey Chris,
I'm thanking my lucky stars that I'm on a slightly longer schedule show,
rigging/anim in maya - but things are definitely slowing down out there.
Will hit hard in a couple of months when there are no productions left to
need vfx. I'm really hoping that full animation is seen as a decent
alternative, and there is enough work around to keep everyone from the wolf
at the door.
Good luck,
Matt


On Mon, 30 Mar 2020 at 13:52, patrick nethercoat 
wrote:

> Hey Chris,
>
> Times are weird, for sure. I've had a number of jobs disappearing. The
> work I've got is design and 2d stuff, and a fair amount of pitching, and
> the rates are not great, but it's work at least.
> I am seeing job calls still, so there is stuff happening, but as the post
> work gets finished where's the new production going to come from?
>
> Good luck everyone.
>
> Patrick
>
> 07717 38 39 40
> https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78rjo3fW-2BI05z8hPddj-2BYSrjut8V8Kr3SyUl8pLj-2FCGT-2FDPGdYFuSQLHhkvggY1PfxbbC5qsYNw-2Fv8xjog5fxGL8dqr7rk1Ge2aA8dH8bWtXKvKeOn8m-2FKmSdSXPGDBQ5VhwqlpGOysZQ0RtMFEHwylb7OOJR9Kw2ATCyYvR53I2V5IaH6lcY94bhcSOB6VF5mnbkrXGWfZimYeTlhJOyKs0DY9lTTiCymbcmp8-2FR4Yt-2FbmtgyL2bQC-2F1Dxvxb-2FZ8czDb5O-2BsYLg6bILyWUWEnjyN6vWtVCQsTC6PRopSaV7g5gwWq3VNJTb7X2TAzSp2pu2bJZXvo9xdSqI-2BMQpKZBnvzadd-2BLVcyTOwpjNAtLZ8zqTTT_x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fSvCYhdSXcfCMxQOz39HeTb4VXD-2BwzKfzcsbWZvQf00I8-2BAwQTNUENh6Wy05lPVr6PykZRb7-2Bjter7fXQrnV0CEh1o9NQ3-2BrIyxpJ6z-2B2t83byt-2Br5AjDmRnjGF9MwAIHAaotQ9On2xQ4REtVH1lCYpWBJ-2Fvrz-2Bxvavfji0e6pV57obuXNLX40DlsUt6ramCSnN6Rt-2Btyp3T-2FNSQAsVSXec
>  
>   >
> https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78rjo3fW-2BI05z8hPddj-2BYSrjut8V8Kr3SyUl8pLj-2FCGT-2FDPGdYFuSQLHhkvggY1PfxbdQyzdkwp-2ByvTUGM-2BW3-2B3zrxNv0IoLX4pgb-2BNkatP2mZCA3wmFGP3SfekGZWe7jBPk-2F-2FYPztmJvglMey37vS2tz6LYSkkt8VVajOu0yfoA-2BmHMDen4bxAKYOpGGA18LVWZhpGu6-2FHctvGu7rQb0AFNvhgzhBuVTih-2F95dprB-2B8y3INUi6tjaYHgvhR5hcMFd9zTgtcTBVSpHgYP92zG5Jeembce56CkRPviqT6WEOR6MQszQipatjPzT35ywlcG1O8ugJf-2F-2FoZ1qXwiLlCO-2BIu4QsF-2BN0-2BpQVsAzPtR34iM3VZTN_x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fSvCYhdSXcfCMxQOz39HeTb4VXD-2BwzKfzcsbWZvQf00I9R0euBWrqUMUfnEanKeNqkblw4hDmvDN1Kg9s-2BNOp3GXEWL-2FbiAR-2BD-2FDHFzSrSt3gFep4-2FwYmXUuCOhDZ5Tt3-2BahgIxdlx3aMpf46fTxKekwmyDAtDA880q9P2AVpPGyfBTdXJWfGboKq9-2BqeW-2BUr0KJzmlI2z5ii4XFd9Xtaxs
>  
> 

Re: freelance work

[patrick nethercoat]

Hey Chris,

Times are weird, for sure. I've had a number of jobs disappearing. The work
I've got is design and 2d stuff, and a fair amount of pitching, and the
rates are not great, but it's work at least.
I am seeing job calls still, so there is stuff happening, but as the post
work gets finished where's the new production going to come from?

Good luck everyone.

Patrick

07717 38 39 40
https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78rjo3fW-2BI05z8hPddj-2BYSrjut8V8Kr3SyUl8pLj-2FCGT-2FDPGdYFuSQLHhkvggY1PfxbbC5qsYNw-2Fv8xjog5fxGL8dqr7rk1Ge2aA8dH8bWtXKvKeOn8m-2FKmSdSXPGDBQ5VhwqlpGOysZQ0RtMFEHwylb7OOJR9Kw2ATCyYvR53I2V5IaH6lcY94bhcSOB6VF5mnbkrXGWfZimYeTlhJOyKs0CEzlzf5H8aG8p4uPF9gS7U4vsqyD2G6N1-2FxzrNmW9lbdgNUIIND6MzbnjvrIMGLJJ7-2BgSBFw3l4xamkRVPwCej6oHawXqglI-2Fj7d4k2LvPKEwQJrZQRPduvKXZhk5WXg1rEGc0BuzJao2AyapmJcdqZ8Mq_x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fSu7BcYvmaIg0rasBArT0hy44gbWflgGmCevrgmJ9Fbytg5-2Bl5-2FMscTIZazI4220CkHgwF34TsAr9Pvw9-2BBr9hSWMJF96kZ5h1pbimV5NJAFbV-2B1aVHjYLlpI6cLaRGVXmBWF-2Bpz9DGnY-2BpOPv-2BXx-2BcEa2TZwYNWwYsBqNIciFIet62HW32Wuqfo6rd6PlobzxzwHyLr6kJOLz5Utw9-2BeQU
 
https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78rjo3fW-2BI05z8hPddj-2BYSrjut8V8Kr3SyUl8pLj-2FCGT-2FDPGdYFuSQLHhkvggY1PfxbdQyzdkwp-2ByvTUGM-2BW3-2B3zrxNv0IoLX4pgb-2BNkatP2mZCA3wmFGP3SfekGZWe7jBPk-2F-2FYPztmJvglMey37vS2tz6LYSkkt8VVajOu0yfoA-2BmHMDen4bxAKYOpGGA18LVWZhpGu6-2FHctvGu7rQb0AFNvhgzhBuVTih-2F95dprB-2B8y39vchx-2FeeNntwds7JoB9RBAs4fkPOJfrHjS7mdKDY6AwrhahkrhNIpn1Jcm6bJYpL9pN1msokK7kgCvuc3AdT7yP-2BXN73K1FyeqcepxN3q-2FkLvSvpaBTSATzltPeFpmXjTsAv_x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fSu7BcYvmaIg0rasBArT0hy44gbWflgGmCevrgmJ9Fbym90krpBwUEx8UB1ERBBrzSNdGFDLaxJKvzjeaB-2BpkoLJOFRTynw2DmOx3prhUkjRRskueqwh-2BrrqpESo-2FN6s0iCR0EEhp1EqUSZSi2NHkskQ1G-2BXPW0qFOwLsWcZiLkQWPOOT6nx0yZAon1ZRqLJ2838LIX-2FFCNrz5RlGCjxENe
 
https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78rjo3fW-2BI05z8hPddj-2BYSrjut8V8Kr3SyUl8pLj-2FCGT-2FDPGdYFuSQLHhkvggY1PfxbbjgHEJndL0REAcJViQlIUrOz6ZCuaFX8FwR83lrIzz4IBqEt-2F8ssN1gzeUKqo48aFYMAHJg6ToKn9VUelYp4AQrZ3VNsWnkiyCgvjirN3wwGDIi203koTEolq1Ng4qa2cveog-2BXDfJfdhRUGiMvayiHAISxl-2Fhw4hLQUClkcAcVRWF1pQrkrwCppGiscuYsxHoD30LVqToKrEkvwPkFEkNQIdgyOQ9KTAG-2FYRghss1mP3PlOFqzkSlQxlRuw-2FdrsSx55PgSM7pP-2F4ukiaLhqo63IKcfes1-2BXj5xrwANei0T56FIdnI2R2r5c2UQ-2BL93yA-3D-3DDiEz_x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fSu7BcYvmaIg0rasBArT0hy44gbWflgGmCevrgmJ9FbykEWyv0lEQemKcHGj-2BfXLXDt9xsaAt2-2BC4fDQn0iro8wPt3oieua8SHPzsIzlspL93i6DjX7giqMI24ZYcDmhL1J1SxzkCG05o7CETadxIfLuWmHIdrzwo4kkx8hyENKoiDdJeky6G4LgQvkc90oxY-2FEQe9qIlC2y5cHBw-2FLySn-2B
 




On Mon, 30 Mar 2020 at 12:46, Chris Marshall 
wrote:

> Hopefully everyone's doing ok and obviously we're all in the same boat
> here. Stay safe out there.
>
>
> On Mon, 30 Mar 2020 at 12:04, Chris Marshall 
> wrote:
>
>> Hi
>> Anyone know of any freelance work out there, home working etc?
>>
>> Cheers
>> Chris
>>
>>
>> --
>> Chris Marshall
>> 07730 533 115
>> https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78rjo3fW-2BI05z8hPddj-2BYSrjut8V8Kr3SyUl8pLj-2FCGT-2FDPGdYFuSQLHhkvggY1PfxbZQfR-2FKexA2KHRyXTiroKSozHjiRnNNMUP0xHbNxyhdpl7aNCnZETX869nBLoCNE34ls3m75bkN1ArPnFW7nOrLX3T8LZlP4gIKSKMrOxUj2vmUcd5vgX-2Bi6Pmvm4YoKBKyvkOGk7sSKUsN9kwKYhSs3dsFt-2FMq4KXFTDr0kisWoWCP19dHRLgdp2kkR1bzWrFLZh0cQQBKGSQhyCymyYzmnlWGvj3DIDxI-2BlIsBzDMCl6FQmOaj4FzsGVCzsgN2k0cgmn7MgaGn9gibOkcktgm8Y62RGIz9zCKDaFYFxkSjDrq0_x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fSu7BcYvmaIg0rasBArT0hy44gbWflgGmCevrgmJ9Fbyo-2BC7kcc-2Bzr0yiiOgUSvQSRYIW5KP83tFA-2FSMkbQlndPmMYfu0Gfh02bVaDOE1Ca-2BGM1EdofZq5zEtXNT-2BgVG-2BR-2BPDcZBDs3jot1ftxyHR2fYcZt1dCUQp0eOgIXAYZWTaw6MPbHQdr4bIjyOLMg54RYy27w99qd6JDvWHFkXXaC
>>  
>> 

Re: freelance work

[Chris Marshall]

Hopefully everyone's doing ok and obviously we're all in the same boat
here. Stay safe out there.


On Mon, 30 Mar 2020 at 12:04, Chris Marshall 
wrote:

> Hi
> Anyone know of any freelance work out there, home working etc?
>
> Cheers
> Chris
>
>
> --
> Chris Marshall
> 07730 533 115
> https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78rjo3fW-2BI05z8hPddj-2BYSrjut8V8Kr3SyUl8pLj-2FCGT-2FDPGdYFuSQLHhkvggY1PfxbZQfR-2FKexA2KHRyXTiroKSrCDAsOkVdfJ3aj0lqp83HHjpxcggu21rKe1uz9sBBixAeYedsRlSYQGAFtxZJlCFvcCwzaUifjPee-2F3JpRXVU3ZEv9qbXtAYazstqYZ-2BOmxPVxu-2BwwvNc0L5iPZ4evFne50lJcsrXO6-2BvV73a4lPqgHATnwfkwCOdEOKU-2Fh7BT04cv0L1bxuonMOBgM0Gq6DptF5ox2EU-2B-2FC4lDeVcgSsqYFyFHMqn3QOczA2FmeaGtBom9E36bYGjZ6aGybg8JKqThEvTBHrv1nbihhBQqMxsCswG_x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fSUOM6Ko5-2FbRLHQiLeA2bc1E37d0eun8UvpHPE0A5019RifTypCvevK6i2SBal2hTbSy5WM9cBRc66yrgYj4xpUn2lFY0UQZpW-2B5gnW1Z560PamLq3br8uRkReahEXIWqHZKrZiOf-2FrgE3kF4EQ-2FjVhRyO1vfyuP3g4KvKloq21dH5i9DvJHqdNsqGDQQXE3CA-3D
>  
> https://u9432639.ct.sendgrid.net/ls/click?upn=A5uD99yDGgJFqsHo0L78rjo3fW-2BI05z8hPddj-2BYSrjut8V8Kr3SyUl8pLj-2FCGT-2FDPGdYFuSQLHhkvggY1PfxbRgOM-2BTJRxrjmVb-2F9ecEck9DORlDxgc2WQHeElJxJgP2-2F5dqoTgSYtiqMqnegk0TohIwwlyGlMwBH0zXJLvCVHmvMdub2ob7odrv90e6W9O9xBpRPFl2xKhSyTqN9vcyDvKyV-2BIvVoPBzKbkR5-2FZ39ppK-2FINwucSIpqIEkAUIJk7iFSvopbIeJCKVXQ6rkkRi4Cy-2F1-2FBOtzALWzYeHuGADQm9kVeeJKuPnME48QyRCjdZt2KcjE99xBZpdQBI6zcrcuk44ivR6PvrpwhWL1kyt0-3Dy4rm_x9fWPgxQbfi69QJnHJqUKZsAJHrwlN1lgOIh62WX2fSUOM6Ko5-2FbRLHQiLeA2bc1E37d0eun8UvpHPE0A5019aJFX-2BycW12vgjxvg2Uf9tZiT5vAxftiOz-2B-2BtTJ4eXtc38jgOZyZKLTp4MOO79Qs7wMOcEKLN7oeek4X-2B1zLYmVciv3-2B-2BJSN-2FvRFgiJDGjk0aQsU74M859wpbkOnYc5k6h-2BMqf-2BrhkfKCjR31Iu8V0o-3D
>  
>
>
>

-- 
Chris Marshall
Mint Motion Limited
029 20 37 27 57
07730 533 115
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freelance work

[Chris Marshall]

Hi
Anyone know of any freelance work out there, home working etc?

Cheers
Chris


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Chris Marshall
07730 533 115
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