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CUBE3D
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===
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[Subject](https://cdn.intra.42.fr/pdf/pdf/48490/fr.subject.pdf)
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## Resources :
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- [Walls textures](https://opengameart.org/art-search-advanced?field_art_tags_tid=wall)
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- [Convert to xpm](https://convertio.co/)
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## Program life cycle :
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- map parsing :
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- [ ] read file,
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- [ ] extract walls textures,
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- [ ] extract sky and ceil colors
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- [ ] import map into array,
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- [ ] save player pos,
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- [ ] handle errors,
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- initialize env
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- generate window
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- display view
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- enable commands
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- react to commands :
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- calculate new pos,
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- display new view,
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- clean and exit
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## thoughts :
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## verify map validity :
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The map must be closed with the player inside the walls.
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- calloc a 2D array as X size is the size of the longer
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line and y is the numbers of map lines.
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- set the array cells to 1 for floor, 2 for walls
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- outside cells will be zeros.
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- read line by line until you encounter first wall then turn around
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the map following the walls and never going on an already visited
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wall until you come back to starting pos.
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## initialize env :
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- required datas : initial player pov angle,
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- walls height
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- eyes positions from screen ( -> field of view)
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- calculate fov rays unit vectors,
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## display view :
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- calculate distance between player and intersection between rays and walls
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- calculate viewed height of walls for each verticle
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- draw walls, floor and sky
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