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1. Shard Calculation

Query:

Response:

Calculated Shard: 144 (from laksa195)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa144.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://thebookofshaders.com/\')), getAhrefsUnparsedNoserviceFromURL(\'https://thebookofshaders.com/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/thebookofshaders.com\/","crawl_time":1775462715,"first_indexed_time":1464066103,"http_code":200,"src_unparsed":"com,thebookofshaders!\/ s443","src_root_hash":"13083744302036701344","history_drop_reason":null,"meta_title":"The Book of Shaders","meta_descriptions":["Gentle step-by-step guide through the abstract and complex universe of Fragment Shaders."],"attrs_boilerpipe_text":"by\nPatricio Gonzalez Vivo\nand\nJen Lowe\nThis is a gentle step-by-step guide through the abstract and complex universe of Fragment Shaders.\nContents\nAbout this book\nGetting started\nWhat is a shader?\n“Hello world!”\nUniforms\nRunning your shader\nAlgorithmic drawing\nShaping functions\nColors\nShapes\nMatrices\nPatterns\nGenerative designs\nRandom\nNoise\nCellular noise\nFractional brownian motion\nFractals\nImage processing\nTextures\nImage operations\nKernel convolutions\nFilters\nOthers effects\nSimulation\nPingpong\nConway\nRipples\nWater color\nReaction diffusion\n3D graphics\nLights\nNormal-maps\nBump-maps\nRay marching\nEnvironmental-maps (spherical and cube)\nReflect and refract\nAppendix:\nOther ways to use this book\nHow can I navigate this book offline?\nHow to run the examples on a Raspberry Pi?\nHow to print this book?\nHow can I collaborate?\nAn introduction for those coming from JS\nby\nNicolas Barradeau\nExamples Gallery\nGlossary\nAbout the Authors\nPatricio Gonzalez Vivo\n(1982, Buenos Aires, Argentina) is a New York based artist and developer. He explores interstitial spaces between organic and synthetic, analog and digital, individual and collective. In his work he uses code as an expressive language with the intention of developing a better together.\nPatricio studied and practiced psychotherapy and expressive art therapy. He holds an MFA in Design & Technology from Parsons The New School, where he now teaches. Currently he works as a Graphic Engineer at Mapzen making openSource mapping tools.\nJen Lowe\nis an independent data scientist and data communicator at Datatelling where she brings together people + numbers + words. She teaches in SVA's Design for Social Innovation program, cofounded the School for Poetic Computation, taught Math for Artists at NYU ITP, researched at the Spatial Information Design Lab at Columbia University, and contributed ideas at the White House Office of Science and Technology Policy. She's spoken at SXSW and Eyeo. Her work has been covered by The New York Times and Fast Company. Her research, writing, and speaking explore the promises and implications of data and technology in society. She has a B.S. in Applied Math and a Master's in Information Science. Often oppositional, she's always on the side of love.\nAcknowledgements\nThanks\nScott Murray\nfor the inspiration and advice.\nThanks\nKenichi Yoneda (Kynd)\n,\nNicolas Barradeau\n,\nKarim Naaji\nfor contributing with support, good ideas and code.\nThanks\nKenichi Yoneda (Kynd)\nand\nSawako\nfor the\nJapanese translation (日本語訳)\nThanks\nTong Li\nand\nYi Zhang\nfor the\nChinese translation (中文版)\nThanks\nJae Hyun Yoo\nand\nJune Kim\nfor the Korean\ntranslation (한국어)\nThanks Nahuel Coppero (Necsoft) for the Spanish\ntranslation (español)\nThanks\nRaphaela Protásio\nand\nLucas Mendonça\nfor the Portuguese\ntranslation (portugues)\nThanks\nNicolas Barradeau\nand\nKarim Naaji\nfor the French\ntranslation (français)\nThanks\nAndrea Rovescalli\nfor the Italian\ntranslation (italiano)\nThanks\nMichael Tischer\nfor the German\ntranslation (deutsch)\nThanks\nSergey Karchevsky\nfor the Russian\ntranslation (russian)\nThanks\nVu Phuong Hoang\nfor the Vietnamese\ntranslation (Tiếng Việt)\nThanks\nWojciech Pachowiak\nfor the Polish\ntranslation (polski)\nThanks\nManoylov Andriy\nfor the Ukrainian\ntranslation (український переклад)\nThanks\nAndy Stanton\nfor fixing and improving\nthe pdf\/epub export pipeline\nThanks to everyone who has believed in this project and\ncontributed with fixes\nor donations.\nGet new chapters\nSign up for the news letter or follow it on\nTwitter\n\/\nMastodon\n\/\nDiscord\nLICENSE\nCopyright (c) Patricio Gonzalez Vivo, 2015 -\nhttp:\/\/patriciogonzalezvivo.com\/\nAll rights reserved.","attrs_markdown":"[Українська](https:\/\/thebookofshaders.com\/?lan=ua) - [Bahasa Indonesia](https:\/\/thebookofshaders.com\/?lan=id) - [Tiếng Việt](https:\/\/thebookofshaders.com\/?lan=vi) - [日本語](https:\/\/thebookofshaders.com\/?lan=jp) - [中文版](https:\/\/thebookofshaders.com\/?lan=ch) - [한국어](https:\/\/thebookofshaders.com\/?lan=kr) - [Español](https:\/\/thebookofshaders.com\/?lan=es) - [Portugues](https:\/\/thebookofshaders.com\/?lan=pt) - [Français](https:\/\/thebookofshaders.com\/?lan=fr) - [Italiano](https:\/\/thebookofshaders.com\/?lan=it) - [Deutsch](https:\/\/thebookofshaders.com\/?lan=de) - [Русский](https:\/\/thebookofshaders.com\/?lan=ru) - [Polski](https:\/\/thebookofshaders.com\/?lan=pl) - [English](https:\/\/thebookofshaders.com\/)\n\n# The Book of Shaders\n*by [Patricio Gonzalez Vivo](http:\/\/patriciogonzalezvivo.com\/) and [Jen Lowe](http:\/\/jenlowe.net\/)*\n\nThis is a gentle step-by-step guide through the abstract and complex universe of Fragment Shaders.\n\n[![](https:\/\/www.paypalobjects.com\/en_US\/i\/btn\/btn_donate_SM.gif)](https:\/\/www.paypal.com\/cgi-bin\/webscr?cmd=_s-xclick&hosted_button_id=B5FSVSHGEATCG)\n\n## Contents\n- [About this book](https:\/\/thebookofshaders.com\/00\/)\n- Getting started\n  - [What is a shader?](https:\/\/thebookofshaders.com\/01\/)\n  - [“Hello world!”](https:\/\/thebookofshaders.com\/02\/)\n  - [Uniforms](https:\/\/thebookofshaders.com\/03\/)\n  - [Running your shader](https:\/\/thebookofshaders.com\/04\/)\n- Algorithmic drawing\n  - [Shaping functions](https:\/\/thebookofshaders.com\/05\/)\n  - [Colors](https:\/\/thebookofshaders.com\/06\/)\n  - [Shapes](https:\/\/thebookofshaders.com\/07\/)\n  - [Matrices](https:\/\/thebookofshaders.com\/08\/)\n  - [Patterns](https:\/\/thebookofshaders.com\/09\/)\n- Generative designs\n  - [Random](https:\/\/thebookofshaders.com\/10\/)\n  - [Noise](https:\/\/thebookofshaders.com\/11\/)\n  - [Cellular noise](https:\/\/thebookofshaders.com\/12\/)\n  - [Fractional brownian motion](https:\/\/thebookofshaders.com\/13\/)\n  - Fractals\n- Image processing\n  - Textures\n  - Image operations\n  - Kernel convolutions\n  - Filters\n  - Others effects\n- Simulation\n  - Pingpong\n  - Conway\n  - Ripples\n  - Water color\n  - Reaction diffusion\n- 3D graphics\n  - Lights\n  - Normal-maps\n  - Bump-maps\n  - Ray marching\n  - Environmental-maps (spherical and cube)\n  - Reflect and refract\n- [Appendix:](https:\/\/thebookofshaders.com\/appendix\/) Other ways to use this book\n  - [How can I navigate this book offline?](https:\/\/thebookofshaders.com\/appendix\/00\/)\n  - [How to run the examples on a Raspberry Pi?](https:\/\/thebookofshaders.com\/appendix\/01\/)\n  - [How to print this book?](https:\/\/thebookofshaders.com\/appendix\/02\/)\n  - [How can I collaborate?](https:\/\/thebookofshaders.com\/appendix\/03\/)\n  - [An introduction for those coming from JS](https:\/\/thebookofshaders.com\/appendix\/04\/) by [Nicolas Barradeau](http:\/\/www.barradeau.com\/)\n- [Examples Gallery](https:\/\/thebookofshaders.com\/examples\/)\n- [Glossary](https:\/\/thebookofshaders.com\/glossary\/)\n## About the Authors\n[Patricio Gonzalez Vivo](http:\/\/patriciogonzalezvivo.com\/) (1982, Buenos Aires, Argentina) is a New York based artist and developer. He explores interstitial spaces between organic and synthetic, analog and digital, individual and collective. In his work he uses code as an expressive language with the intention of developing a better together.\n\nPatricio studied and practiced psychotherapy and expressive art therapy. He holds an MFA in Design & Technology from Parsons The New School, where he now teaches. Currently he works as a Graphic Engineer at Mapzen making openSource mapping tools.\n\n[WebSite](http:\/\/patriciogonzalezvivo.com\/) - [Twitter](https:\/\/twitter.com\/patriciogv) - [GitHub](https:\/\/github.com\/patriciogonzalezvivo) - [Vimeo](https:\/\/vimeo.com\/patriciogv) -  [Flickr](https:\/\/www.flickr.com\/photos\/106950246@N06\/)\n\n[Jen Lowe](http:\/\/jenlowe.net\/) is an independent data scientist and data communicator at Datatelling where she brings together people + numbers + words. She teaches in SVA's Design for Social Innovation program, cofounded the School for Poetic Computation, taught Math for Artists at NYU ITP, researched at the Spatial Information Design Lab at Columbia University, and contributed ideas at the White House Office of Science and Technology Policy. She's spoken at SXSW and Eyeo. Her work has been covered by The New York Times and Fast Company. Her research, writing, and speaking explore the promises and implications of data and technology in society. She has a B.S. in Applied Math and a Master's in Information Science. Often oppositional, she's always on the side of love.\n\n[WebSite](http:\/\/jenlowe.net\/) - [Twitter](https:\/\/twitter.com\/datatelling) - [GitHub](https:\/\/github.com\/datatelling)\n\n## Acknowledgements\nThanks [Scott Murray](http:\/\/alignedleft.com\/) for the inspiration and advice.\n\nThanks [Kenichi Yoneda (Kynd)](https:\/\/twitter.com\/kyndinfo), [Nicolas Barradeau](https:\/\/twitter.com\/nicoptere), [Karim Naaji](http:\/\/karim.naaji.fr\/) for contributing with support, good ideas and code.\n\nThanks [Kenichi Yoneda (Kynd)](https:\/\/twitter.com\/kyndinfo) and [Sawako](https:\/\/twitter.com\/sawakohome) for the [Japanese translation (日本語訳)](https:\/\/thebookofshaders.com\/?lan=jp)\n\nThanks [Tong Li](https:\/\/www.facebook.com\/tong.lee.9484) and [Yi Zhang](https:\/\/www.facebook.com\/archer.zetta?pnref=story) for the [Chinese translation (中文版)](https:\/\/thebookofshaders.com\/?lan=ch)\n\nThanks [Jae Hyun Yoo](https:\/\/www.facebook.com\/fkkcloud) and [June Kim](https:\/\/github.com\/rlawns324) for the Korean [translation (한국어)](https:\/\/thebookofshaders.com\/?lan=kr)\n\nThanks Nahuel Coppero (Necsoft) for the Spanish [translation (español)](https:\/\/thebookofshaders.com\/?lan=es)\n\nThanks [Raphaela Protásio](https:\/\/github.com\/Rawphs) and [Lucas Mendonça](https:\/\/github.com\/luuchowl) for the Portuguese [translation (portugues)](https:\/\/thebookofshaders.com\/?lan=pt)\n\nThanks [Nicolas Barradeau](https:\/\/twitter.com\/nicoptere) and [Karim Naaji](http:\/\/karim.naaji.fr\/) for the French [translation (français)](https:\/\/thebookofshaders.com\/?lan=fr)\n\nThanks [Andrea Rovescalli](https:\/\/www.earove.info\/) for the Italian [translation (italiano)](https:\/\/thebookofshaders.com\/?lan=it)\n\nThanks [Michael Tischer](http:\/\/www.mitinet.de\/) for the German [translation (deutsch)](https:\/\/thebookofshaders.com\/?lan=de)\n\nThanks [Sergey Karchevsky](https:\/\/www.facebook.com\/sergey.karchevsky.3) for the Russian [translation (russian)](https:\/\/thebookofshaders.com\/?lan=ru)\n\nThanks [Vu Phuong Hoang](https:\/\/www.facebook.com\/vuphuonghoang88) for the Vietnamese [translation (Tiếng Việt)](https:\/\/thebookofshaders.com\/?lan=vi)\n\nThanks [Wojciech Pachowiak](https:\/\/github.com\/WojtekPachowiak) for the Polish [translation (polski)](https:\/\/thebookofshaders.com\/?lan=pl)\n\nThanks [Manoylov Andriy](https:\/\/twitter.com\/ManoylovAC) for the Ukrainian [translation (український переклад)](https:\/\/thebookofshaders.com\/?lan=ua)\n\nThanks [Andy Stanton](https:\/\/andy.stanton.is\/) for fixing and improving [the pdf\/epub export pipeline](https:\/\/thebookofshaders.com\/appendix\/02\/)\n\nThanks to everyone who has believed in this project and [contributed with fixes](https:\/\/github.com\/patriciogonzalezvivo\/thebookofshaders\/graphs\/contributors) or donations.\n\n## Get new chapters\nSign up for the news letter or follow it on [Twitter](https:\/\/twitter.com\/bookofshaders) \/ [Mastodon](https:\/\/mastodon.gamedev.place\/@bookofshaders) \/ [Discord](https:\/\/thebookofshaders.com\/shader.zone)\n\n## LICENSE\nCopyright (c) Patricio Gonzalez Vivo, 2015 - <http:\/\/patriciogonzalezvivo.com\/> All rights reserved.\n\nCopyright 2015 [Patricio Gonzalez Vivo](http:\/\/www.patriciogonzalezvivo.com\/)","attrs_readable_markdown":"*by [Patricio Gonzalez Vivo](http:\/\/patriciogonzalezvivo.com\/) and [Jen Lowe](http:\/\/jenlowe.net\/)*\n\nThis is a gentle step-by-step guide through the abstract and complex universe of Fragment Shaders.\n\n## Contents\n- [About this book](https:\/\/thebookofshaders.com\/00\/)\n- Getting started\n  - [What is a shader?](https:\/\/thebookofshaders.com\/01\/)\n  - [“Hello world!”](https:\/\/thebookofshaders.com\/02\/)\n  - [Uniforms](https:\/\/thebookofshaders.com\/03\/)\n  - [Running your shader](https:\/\/thebookofshaders.com\/04\/)\n- Algorithmic drawing\n  - [Shaping functions](https:\/\/thebookofshaders.com\/05\/)\n  - [Colors](https:\/\/thebookofshaders.com\/06\/)\n  - [Shapes](https:\/\/thebookofshaders.com\/07\/)\n  - [Matrices](https:\/\/thebookofshaders.com\/08\/)\n  - [Patterns](https:\/\/thebookofshaders.com\/09\/)\n- Generative designs\n  - [Random](https:\/\/thebookofshaders.com\/10\/)\n  - [Noise](https:\/\/thebookofshaders.com\/11\/)\n  - [Cellular noise](https:\/\/thebookofshaders.com\/12\/)\n  - [Fractional brownian motion](https:\/\/thebookofshaders.com\/13\/)\n  - Fractals\n- Image processing\n  - Textures\n  - Image operations\n  - Kernel convolutions\n  - Filters\n  - Others effects\n- Simulation\n  - Pingpong\n  - Conway\n  - Ripples\n  - Water color\n  - Reaction diffusion\n- 3D graphics\n  - Lights\n  - Normal-maps\n  - Bump-maps\n  - Ray marching\n  - Environmental-maps (spherical and cube)\n  - Reflect and refract\n- [Appendix:](https:\/\/thebookofshaders.com\/appendix\/) Other ways to use this book\n  - [How can I navigate this book offline?](https:\/\/thebookofshaders.com\/appendix\/00\/)\n  - [How to run the examples on a Raspberry Pi?](https:\/\/thebookofshaders.com\/appendix\/01\/)\n  - [How to print this book?](https:\/\/thebookofshaders.com\/appendix\/02\/)\n  - [How can I collaborate?](https:\/\/thebookofshaders.com\/appendix\/03\/)\n  - [An introduction for those coming from JS](https:\/\/thebookofshaders.com\/appendix\/04\/) by [Nicolas Barradeau](http:\/\/www.barradeau.com\/)\n- [Examples Gallery](https:\/\/thebookofshaders.com\/examples\/)\n- [Glossary](https:\/\/thebookofshaders.com\/glossary\/)\n## About the Authors\n[Patricio Gonzalez Vivo](http:\/\/patriciogonzalezvivo.com\/) (1982, Buenos Aires, Argentina) is a New York based artist and developer. He explores interstitial spaces between organic and synthetic, analog and digital, individual and collective. In his work he uses code as an expressive language with the intention of developing a better together.\n\nPatricio studied and practiced psychotherapy and expressive art therapy. He holds an MFA in Design & Technology from Parsons The New School, where he now teaches. Currently he works as a Graphic Engineer at Mapzen making openSource mapping tools.\n\n[Jen Lowe](http:\/\/jenlowe.net\/) is an independent data scientist and data communicator at Datatelling where she brings together people + numbers + words. She teaches in SVA's Design for Social Innovation program, cofounded the School for Poetic Computation, taught Math for Artists at NYU ITP, researched at the Spatial Information Design Lab at Columbia University, and contributed ideas at the White House Office of Science and Technology Policy. She's spoken at SXSW and Eyeo. Her work has been covered by The New York Times and Fast Company. Her research, writing, and speaking explore the promises and implications of data and technology in society. She has a B.S. in Applied Math and a Master's in Information Science. Often oppositional, she's always on the side of love.\n\n## Acknowledgements\nThanks [Scott Murray](http:\/\/alignedleft.com\/) for the inspiration and advice.\n\nThanks [Kenichi Yoneda (Kynd)](https:\/\/twitter.com\/kyndinfo), [Nicolas Barradeau](https:\/\/twitter.com\/nicoptere), [Karim Naaji](http:\/\/karim.naaji.fr\/) for contributing with support, good ideas and code.\n\nThanks [Kenichi Yoneda (Kynd)](https:\/\/twitter.com\/kyndinfo) and [Sawako](https:\/\/twitter.com\/sawakohome) for the [Japanese translation (日本語訳)](https:\/\/thebookofshaders.com\/?lan=jp)\n\nThanks [Tong Li](https:\/\/www.facebook.com\/tong.lee.9484) and [Yi Zhang](https:\/\/www.facebook.com\/archer.zetta?pnref=story) for the [Chinese translation (中文版)](https:\/\/thebookofshaders.com\/?lan=ch)\n\nThanks [Jae Hyun Yoo](https:\/\/www.facebook.com\/fkkcloud) and [June Kim](https:\/\/github.com\/rlawns324) for the Korean [translation (한국어)](https:\/\/thebookofshaders.com\/?lan=kr)\n\nThanks Nahuel Coppero (Necsoft) for the Spanish [translation (español)](https:\/\/thebookofshaders.com\/?lan=es)\n\nThanks [Raphaela Protásio](https:\/\/github.com\/Rawphs) and [Lucas Mendonça](https:\/\/github.com\/luuchowl) for the Portuguese [translation (portugues)](https:\/\/thebookofshaders.com\/?lan=pt)\n\nThanks [Nicolas Barradeau](https:\/\/twitter.com\/nicoptere) and [Karim Naaji](http:\/\/karim.naaji.fr\/) for the French [translation (français)](https:\/\/thebookofshaders.com\/?lan=fr)\n\nThanks [Andrea Rovescalli](https:\/\/www.earove.info\/) for the Italian [translation (italiano)](https:\/\/thebookofshaders.com\/?lan=it)\n\nThanks [Michael Tischer](http:\/\/www.mitinet.de\/) for the German [translation (deutsch)](https:\/\/thebookofshaders.com\/?lan=de)\n\nThanks [Sergey Karchevsky](https:\/\/www.facebook.com\/sergey.karchevsky.3) for the Russian [translation (russian)](https:\/\/thebookofshaders.com\/?lan=ru)\n\nThanks [Vu Phuong Hoang](https:\/\/www.facebook.com\/vuphuonghoang88) for the Vietnamese [translation (Tiếng Việt)](https:\/\/thebookofshaders.com\/?lan=vi)\n\nThanks [Wojciech Pachowiak](https:\/\/github.com\/WojtekPachowiak) for the Polish [translation (polski)](https:\/\/thebookofshaders.com\/?lan=pl)\n\nThanks [Manoylov Andriy](https:\/\/twitter.com\/ManoylovAC) for the Ukrainian [translation (український переклад)](https:\/\/thebookofshaders.com\/?lan=ua)\n\nThanks [Andy Stanton](https:\/\/andy.stanton.is\/) for fixing and improving [the pdf\/epub export pipeline](https:\/\/thebookofshaders.com\/appendix\/02\/)\n\nThanks to everyone who has believed in this project and [contributed with fixes](https:\/\/github.com\/patriciogonzalezvivo\/thebookofshaders\/graphs\/contributors) or donations.\n\n## Get new chapters\nSign up for the news letter or follow it on [Twitter](https:\/\/twitter.com\/bookofshaders) \/ [Mastodon](https:\/\/mastodon.gamedev.place\/@bookofshaders) \/ [Discord](https:\/\/thebookofshaders.com\/shader.zone)\n\n## LICENSE\nCopyright (c) Patricio Gonzalez Vivo, 2015 - <http:\/\/patriciogonzalezvivo.com\/> All rights reserved.","meta_canonical":null}

3. Robots.txt Check

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4. Spam/Ban Check

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5. Seen Status Check

ℹ️ Skipped - page is already crawled

📄

INDEXABLE

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CRAWLED

5 hours ago

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ROBOTS ALLOWED

Page Info Filters

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URL	https://thebookofshaders.com/
Last Crawled	2026-04-06 08:05:15 (5 hours ago)
First Indexed	2016-05-24 05:01:43 (9 years ago)
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Meta Canonical	null
Boilerpipe Text	by Patricio Gonzalez Vivo and Jen Lowe This is a gentle step-by-step guide through the abstract and complex universe of Fragment Shaders. Contents About this book Getting started What is a shader? “Hello world!” Uniforms Running your shader Algorithmic drawing Shaping functions Colors Shapes Matrices Patterns Generative designs Random Noise Cellular noise Fractional brownian motion Fractals Image processing Textures Image operations Kernel convolutions Filters Others effects Simulation Pingpong Conway Ripples Water color Reaction diffusion 3D graphics Lights Normal-maps Bump-maps Ray marching Environmental-maps (spherical and cube) Reflect and refract Appendix: Other ways to use this book How can I navigate this book offline? How to run the examples on a Raspberry Pi? How to print this book? How can I collaborate? An introduction for those coming from JS by Nicolas Barradeau Examples Gallery Glossary About the Authors Patricio Gonzalez Vivo (1982, Buenos Aires, Argentina) is a New York based artist and developer. He explores interstitial spaces between organic and synthetic, analog and digital, individual and collective. In his work he uses code as an expressive language with the intention of developing a better together. Patricio studied and practiced psychotherapy and expressive art therapy. He holds an MFA in Design & Technology from Parsons The New School, where he now teaches. Currently he works as a Graphic Engineer at Mapzen making openSource mapping tools. Jen Lowe is an independent data scientist and data communicator at Datatelling where she brings together people + numbers + words. She teaches in SVA's Design for Social Innovation program, cofounded the School for Poetic Computation, taught Math for Artists at NYU ITP, researched at the Spatial Information Design Lab at Columbia University, and contributed ideas at the White House Office of Science and Technology Policy. She's spoken at SXSW and Eyeo. Her work has been covered by The New York Times and Fast Company. Her research, writing, and speaking explore the promises and implications of data and technology in society. She has a B.S. in Applied Math and a Master's in Information Science. Often oppositional, she's always on the side of love. Acknowledgements Thanks Scott Murray for the inspiration and advice. Thanks Kenichi Yoneda (Kynd) , Nicolas Barradeau , Karim Naaji for contributing with support, good ideas and code. Thanks Kenichi Yoneda (Kynd) and Sawako for the Japanese translation (日本語訳) Thanks Tong Li and Yi Zhang for the Chinese translation (中文版) Thanks Jae Hyun Yoo and June Kim for the Korean translation (한국어) Thanks Nahuel Coppero (Necsoft) for the Spanish translation (español) Thanks Raphaela Protásio and Lucas Mendonça for the Portuguese translation (portugues) Thanks Nicolas Barradeau and Karim Naaji for the French translation (français) Thanks Andrea Rovescalli for the Italian translation (italiano) Thanks Michael Tischer for the German translation (deutsch) Thanks Sergey Karchevsky for the Russian translation (russian) Thanks Vu Phuong Hoang for the Vietnamese translation (Tiếng Việt) Thanks Wojciech Pachowiak for the Polish translation (polski) Thanks Manoylov Andriy for the Ukrainian translation (український переклад) Thanks Andy Stanton for fixing and improving the pdf/epub export pipeline Thanks to everyone who has believed in this project and contributed with fixes or donations. Get new chapters Sign up for the news letter or follow it on Twitter / Mastodon / Discord LICENSE Copyright (c) Patricio Gonzalez Vivo, 2015 - http://patriciogonzalezvivo.com/ All rights reserved.
Markdown	[Українська](https://thebookofshaders.com/?lan=ua) - [Bahasa Indonesia](https://thebookofshaders.com/?lan=id) - [Tiếng Việt](https://thebookofshaders.com/?lan=vi) - [日本語](https://thebookofshaders.com/?lan=jp) - [中文版](https://thebookofshaders.com/?lan=ch) - [한국어](https://thebookofshaders.com/?lan=kr) - [Español](https://thebookofshaders.com/?lan=es) - [Portugues](https://thebookofshaders.com/?lan=pt) - [Français](https://thebookofshaders.com/?lan=fr) - [Italiano](https://thebookofshaders.com/?lan=it) - [Deutsch](https://thebookofshaders.com/?lan=de) - [Русский](https://thebookofshaders.com/?lan=ru) - [Polski](https://thebookofshaders.com/?lan=pl) - [English](https://thebookofshaders.com/) # The Book of Shaders by [Patricio Gonzalez Vivo](http://patriciogonzalezvivo.com/) and [Jen Lowe](http://jenlowe.net/) This is a gentle step-by-step guide through the abstract and complex universe of Fragment Shaders. [![](https://www.paypalobjects.com/en_US/i/btn/btn_donate_SM.gif)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=B5FSVSHGEATCG) ## Contents - [About this book](https://thebookofshaders.com/00/) - Getting started - [What is a shader?](https://thebookofshaders.com/01/) - [“Hello world!”](https://thebookofshaders.com/02/) - [Uniforms](https://thebookofshaders.com/03/) - [Running your shader](https://thebookofshaders.com/04/) - Algorithmic drawing - [Shaping functions](https://thebookofshaders.com/05/) - [Colors](https://thebookofshaders.com/06/) - [Shapes](https://thebookofshaders.com/07/) - [Matrices](https://thebookofshaders.com/08/) - [Patterns](https://thebookofshaders.com/09/) - Generative designs - [Random](https://thebookofshaders.com/10/) - [Noise](https://thebookofshaders.com/11/) - [Cellular noise](https://thebookofshaders.com/12/) - [Fractional brownian motion](https://thebookofshaders.com/13/) - Fractals - Image processing - Textures - Image operations - Kernel convolutions - Filters - Others effects - Simulation - Pingpong - Conway - Ripples - Water color - Reaction diffusion - 3D graphics - Lights - Normal-maps - Bump-maps - Ray marching - Environmental-maps (spherical and cube) - Reflect and refract - [Appendix:](https://thebookofshaders.com/appendix/) Other ways to use this book - [How can I navigate this book offline?](https://thebookofshaders.com/appendix/00/) - [How to run the examples on a Raspberry Pi?](https://thebookofshaders.com/appendix/01/) - [How to print this book?](https://thebookofshaders.com/appendix/02/) - [How can I collaborate?](https://thebookofshaders.com/appendix/03/) - [An introduction for those coming from JS](https://thebookofshaders.com/appendix/04/) by [Nicolas Barradeau](http://www.barradeau.com/) - [Examples Gallery](https://thebookofshaders.com/examples/) - [Glossary](https://thebookofshaders.com/glossary/) ## About the Authors [Patricio Gonzalez Vivo](http://patriciogonzalezvivo.com/) (1982, Buenos Aires, Argentina) is a New York based artist and developer. He explores interstitial spaces between organic and synthetic, analog and digital, individual and collective. In his work he uses code as an expressive language with the intention of developing a better together. Patricio studied and practiced psychotherapy and expressive art therapy. He holds an MFA in Design & Technology from Parsons The New School, where he now teaches. Currently he works as a Graphic Engineer at Mapzen making openSource mapping tools. [WebSite](http://patriciogonzalezvivo.com/) - [Twitter](https://twitter.com/patriciogv) - [GitHub](https://github.com/patriciogonzalezvivo) - [Vimeo](https://vimeo.com/patriciogv) - [Flickr](https://www.flickr.com/photos/106950246@N06/) [Jen Lowe](http://jenlowe.net/) is an independent data scientist and data communicator at Datatelling where she brings together people + numbers + words. She teaches in SVA's Design for Social Innovation program, cofounded the School for Poetic Computation, taught Math for Artists at NYU ITP, researched at the Spatial Information Design Lab at Columbia University, and contributed ideas at the White House Office of Science and Technology Policy. She's spoken at SXSW and Eyeo. Her work has been covered by The New York Times and Fast Company. Her research, writing, and speaking explore the promises and implications of data and technology in society. She has a B.S. in Applied Math and a Master's in Information Science. Often oppositional, she's always on the side of love. [WebSite](http://jenlowe.net/) - [Twitter](https://twitter.com/datatelling) - [GitHub](https://github.com/datatelling) ## Acknowledgements Thanks [Scott Murray](http://alignedleft.com/) for the inspiration and advice. Thanks [Kenichi Yoneda (Kynd)](https://twitter.com/kyndinfo), [Nicolas Barradeau](https://twitter.com/nicoptere), [Karim Naaji](http://karim.naaji.fr/) for contributing with support, good ideas and code. Thanks [Kenichi Yoneda (Kynd)](https://twitter.com/kyndinfo) and [Sawako](https://twitter.com/sawakohome) for the [Japanese translation (日本語訳)](https://thebookofshaders.com/?lan=jp) Thanks [Tong Li](https://www.facebook.com/tong.lee.9484) and [Yi Zhang](https://www.facebook.com/archer.zetta?pnref=story) for the [Chinese translation (中文版)](https://thebookofshaders.com/?lan=ch) Thanks [Jae Hyun Yoo](https://www.facebook.com/fkkcloud) and [June Kim](https://github.com/rlawns324) for the Korean [translation (한국어)](https://thebookofshaders.com/?lan=kr) Thanks Nahuel Coppero (Necsoft) for the Spanish [translation (español)](https://thebookofshaders.com/?lan=es) Thanks [Raphaela Protásio](https://github.com/Rawphs) and [Lucas Mendonça](https://github.com/luuchowl) for the Portuguese [translation (portugues)](https://thebookofshaders.com/?lan=pt) Thanks [Nicolas Barradeau](https://twitter.com/nicoptere) and [Karim Naaji](http://karim.naaji.fr/) for the French [translation (français)](https://thebookofshaders.com/?lan=fr) Thanks [Andrea Rovescalli](https://www.earove.info/) for the Italian [translation (italiano)](https://thebookofshaders.com/?lan=it) Thanks [Michael Tischer](http://www.mitinet.de/) for the German [translation (deutsch)](https://thebookofshaders.com/?lan=de) Thanks [Sergey Karchevsky](https://www.facebook.com/sergey.karchevsky.3) for the Russian [translation (russian)](https://thebookofshaders.com/?lan=ru) Thanks [Vu Phuong Hoang](https://www.facebook.com/vuphuonghoang88) for the Vietnamese [translation (Tiếng Việt)](https://thebookofshaders.com/?lan=vi) Thanks [Wojciech Pachowiak](https://github.com/WojtekPachowiak) for the Polish [translation (polski)](https://thebookofshaders.com/?lan=pl) Thanks [Manoylov Andriy](https://twitter.com/ManoylovAC) for the Ukrainian [translation (український переклад)](https://thebookofshaders.com/?lan=ua) Thanks [Andy Stanton](https://andy.stanton.is/) for fixing and improving [the pdf/epub export pipeline](https://thebookofshaders.com/appendix/02/) Thanks to everyone who has believed in this project and [contributed with fixes](https://github.com/patriciogonzalezvivo/thebookofshaders/graphs/contributors) or donations. ## Get new chapters Sign up for the news letter or follow it on [Twitter](https://twitter.com/bookofshaders) / [Mastodon](https://mastodon.gamedev.place/@bookofshaders) / [Discord](https://thebookofshaders.com/shader.zone) ## LICENSE Copyright (c) Patricio Gonzalez Vivo, 2015 - <http://patriciogonzalezvivo.com/> All rights reserved. Copyright 2015 [Patricio Gonzalez Vivo](http://www.patriciogonzalezvivo.com/)
Readable Markdown	by [Patricio Gonzalez Vivo](http://patriciogonzalezvivo.com/) and [Jen Lowe](http://jenlowe.net/) This is a gentle step-by-step guide through the abstract and complex universe of Fragment Shaders. ## Contents - [About this book](https://thebookofshaders.com/00/) - Getting started - [What is a shader?](https://thebookofshaders.com/01/) - [“Hello world!”](https://thebookofshaders.com/02/) - [Uniforms](https://thebookofshaders.com/03/) - [Running your shader](https://thebookofshaders.com/04/) - Algorithmic drawing - [Shaping functions](https://thebookofshaders.com/05/) - [Colors](https://thebookofshaders.com/06/) - [Shapes](https://thebookofshaders.com/07/) - [Matrices](https://thebookofshaders.com/08/) - [Patterns](https://thebookofshaders.com/09/) - Generative designs - [Random](https://thebookofshaders.com/10/) - [Noise](https://thebookofshaders.com/11/) - [Cellular noise](https://thebookofshaders.com/12/) - [Fractional brownian motion](https://thebookofshaders.com/13/) - Fractals - Image processing - Textures - Image operations - Kernel convolutions - Filters - Others effects - Simulation - Pingpong - Conway - Ripples - Water color - Reaction diffusion - 3D graphics - Lights - Normal-maps - Bump-maps - Ray marching - Environmental-maps (spherical and cube) - Reflect and refract - [Appendix:](https://thebookofshaders.com/appendix/) Other ways to use this book - [How can I navigate this book offline?](https://thebookofshaders.com/appendix/00/) - [How to run the examples on a Raspberry Pi?](https://thebookofshaders.com/appendix/01/) - [How to print this book?](https://thebookofshaders.com/appendix/02/) - [How can I collaborate?](https://thebookofshaders.com/appendix/03/) - [An introduction for those coming from JS](https://thebookofshaders.com/appendix/04/) by [Nicolas Barradeau](http://www.barradeau.com/) - [Examples Gallery](https://thebookofshaders.com/examples/) - [Glossary](https://thebookofshaders.com/glossary/) ## About the Authors [Patricio Gonzalez Vivo](http://patriciogonzalezvivo.com/) (1982, Buenos Aires, Argentina) is a New York based artist and developer. He explores interstitial spaces between organic and synthetic, analog and digital, individual and collective. In his work he uses code as an expressive language with the intention of developing a better together. Patricio studied and practiced psychotherapy and expressive art therapy. He holds an MFA in Design & Technology from Parsons The New School, where he now teaches. Currently he works as a Graphic Engineer at Mapzen making openSource mapping tools. [Jen Lowe](http://jenlowe.net/) is an independent data scientist and data communicator at Datatelling where she brings together people + numbers + words. She teaches in SVA's Design for Social Innovation program, cofounded the School for Poetic Computation, taught Math for Artists at NYU ITP, researched at the Spatial Information Design Lab at Columbia University, and contributed ideas at the White House Office of Science and Technology Policy. She's spoken at SXSW and Eyeo. Her work has been covered by The New York Times and Fast Company. Her research, writing, and speaking explore the promises and implications of data and technology in society. She has a B.S. in Applied Math and a Master's in Information Science. Often oppositional, she's always on the side of love. ## Acknowledgements Thanks [Scott Murray](http://alignedleft.com/) for the inspiration and advice. Thanks [Kenichi Yoneda (Kynd)](https://twitter.com/kyndinfo), [Nicolas Barradeau](https://twitter.com/nicoptere), [Karim Naaji](http://karim.naaji.fr/) for contributing with support, good ideas and code. Thanks [Kenichi Yoneda (Kynd)](https://twitter.com/kyndinfo) and [Sawako](https://twitter.com/sawakohome) for the [Japanese translation (日本語訳)](https://thebookofshaders.com/?lan=jp) Thanks [Tong Li](https://www.facebook.com/tong.lee.9484) and [Yi Zhang](https://www.facebook.com/archer.zetta?pnref=story) for the [Chinese translation (中文版)](https://thebookofshaders.com/?lan=ch) Thanks [Jae Hyun Yoo](https://www.facebook.com/fkkcloud) and [June Kim](https://github.com/rlawns324) for the Korean [translation (한국어)](https://thebookofshaders.com/?lan=kr) Thanks Nahuel Coppero (Necsoft) for the Spanish [translation (español)](https://thebookofshaders.com/?lan=es) Thanks [Raphaela Protásio](https://github.com/Rawphs) and [Lucas Mendonça](https://github.com/luuchowl) for the Portuguese [translation (portugues)](https://thebookofshaders.com/?lan=pt) Thanks [Nicolas Barradeau](https://twitter.com/nicoptere) and [Karim Naaji](http://karim.naaji.fr/) for the French [translation (français)](https://thebookofshaders.com/?lan=fr) Thanks [Andrea Rovescalli](https://www.earove.info/) for the Italian [translation (italiano)](https://thebookofshaders.com/?lan=it) Thanks [Michael Tischer](http://www.mitinet.de/) for the German [translation (deutsch)](https://thebookofshaders.com/?lan=de) Thanks [Sergey Karchevsky](https://www.facebook.com/sergey.karchevsky.3) for the Russian [translation (russian)](https://thebookofshaders.com/?lan=ru) Thanks [Vu Phuong Hoang](https://www.facebook.com/vuphuonghoang88) for the Vietnamese [translation (Tiếng Việt)](https://thebookofshaders.com/?lan=vi) Thanks [Wojciech Pachowiak](https://github.com/WojtekPachowiak) for the Polish [translation (polski)](https://thebookofshaders.com/?lan=pl) Thanks [Manoylov Andriy](https://twitter.com/ManoylovAC) for the Ukrainian [translation (український переклад)](https://thebookofshaders.com/?lan=ua) Thanks [Andy Stanton](https://andy.stanton.is/) for fixing and improving [the pdf/epub export pipeline](https://thebookofshaders.com/appendix/02/) Thanks to everyone who has believed in this project and [contributed with fixes](https://github.com/patriciogonzalezvivo/thebookofshaders/graphs/contributors) or donations. ## Get new chapters Sign up for the news letter or follow it on [Twitter](https://twitter.com/bookofshaders) / [Mastodon](https://mastodon.gamedev.place/@bookofshaders) / [Discord](https://thebookofshaders.com/shader.zone) ## LICENSE Copyright (c) Patricio Gonzalez Vivo, 2015 - <http://patriciogonzalezvivo.com/> All rights reserved.
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