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Let's just say that I want to create text file with 3d coordinates of an object (cube or sphere), and my software renderer shoould read this file and display it

by i45_n5 5y ago

Let's just say that I want to create text file with 3d coordinates of an object (cube or sphere), and my software renderer shoould read this file and display it on the screen. And I can zoom in/out, change coordinates of vertecies with a mouse, rotate and move it. This cube can be wired or colored and if it wired I want to see which edges are visible and which are not. And to render this cube I want to use only setpixel/drawline functions from win api or sdl. Thanks for the links.

pfranz 5y ago
That sounds like a fun challenge. If you're constraining yourself to use as few libraries as possible, I'd go with OBJ [1] for the 3d mesh and PPM [2] for writing images. It's easy to implement a bare bones reader/writer and some OSes (like macOS) can show them in the file browser. Raytracing in One Weekend goes over PPM. There are a bunch of header-only libraries that handle different file formats like stb_image [3]. I usually end up using those when I start dealing with textures or UI elements. I don't use Windows so I haven't used their APIs for projects like this. I'd usually go for imgui or SDL (like you mentioned). tinyracaster, a sibling project of tinyrenderer, touches on those [4]. I liked LazyFoo's SDL tutorial [5]. Good luck! [1] https://en.wikipedia.org/wiki/Wavefront_.obj_file https://en.wikipedia.org/wiki/Wavefront_.obj_file [2] https://en.wikipedia.org/wiki/Netpbm#PPM_example https://en.wikipedia.org/wiki/Netpbm#PPM_example [3] https://github.com/nothings/stb https://github.com/nothings/stb [4] https://github.com/ssloy/tinyraycaster/wiki/Part-4:-SDL https://github.com/ssloy/tinyraycaster/wiki/Part-4:-SDL [5] https://lazyfoo.net/tutorials/SDL/index.php https://lazyfoo.net/tutorials/SDL/index.php
- i45_n5 5y ago
  Yeah, I know about ppm but I didn't know about .obj files. That's great. And sdl is a good crossplatform choice because linux doesn't have similar to win api GDI. Thanks for the links.

by i45_n5 5y ago

pfranz 5y ago

That sounds like a fun challenge. If you're constraining yourself to use as few libraries as possible, I'd go with OBJ [1] for the 3d mesh and PPM [2] for writing images. It's easy to implement a bare bones reader/writer and some OSes (like macOS) can show them in the file browser. Raytracing in One Weekend goes over PPM. There are a bunch of header-only libraries that handle different file formats like stb_image [3]. I usually end up using those when I start dealing with textures or UI elements. I don't use Windows so I haven't used their APIs for projects like this. I'd usually go for imgui or SDL (like you mentioned). tinyracaster, a sibling project of tinyrenderer, touches on those [4]. I liked LazyFoo's SDL tutorial [5]. Good luck! [1] https://en.wikipedia.org/wiki/Wavefront_.obj_file https://en.wikipedia.org/wiki/Wavefront_.obj_file [2] https://en.wikipedia.org/wiki/Netpbm#PPM_example https://en.wikipedia.org/wiki/Netpbm#PPM_example [3] https://github.com/nothings/stb https://github.com/nothings/stb [4] https://github.com/ssloy/tinyraycaster/wiki/Part-4:-SDL https://github.com/ssloy/tinyraycaster/wiki/Part-4:-SDL [5] https://lazyfoo.net/tutorials/SDL/index.php https://lazyfoo.net/tutorials/SDL/index.php

i45_n5 5y ago
Yeah, I know about ppm but I didn't know about .obj files. That's great. And sdl is a good crossplatform choice because linux doesn't have similar to win api GDI. Thanks for the links.