https://fcidade.com/en/ Francisco Cidade's Hobby Library: graphics programming, gamedev, programming languages and whatever else I am learning. enSat, 03 Oct 2026 14:00:00 -0300 https://fcidade.com/en/posts/shader-de-planeta-pixel-art-parte-2/ Sat, 03 Oct 2026 14:00:00 -0300 https://fcidade.com/en/posts/shader-de-planeta-pixel-art-parte-2/ From the terrestrial planet to desert, ice, lava, gas giant and moon by swapping the color table, then polar caps, axial tilt and rings, with the final result free on itch. https://fcidade.com/en/posts/shader-de-planeta-pixel-art-parte-1/ Sat, 03 Oct 2026 13:00:00 -0300 https://fcidade.com/en/posts/shader-de-planeta-pixel-art-parte-1/ How to draw a pixel art planet with a shader, no texture: fake sphere, 3D noise, color by height, stepped light, clouds with shadows, atmosphere and a GIF that loops cleanly. https://fcidade.com/en/posts/academia-em-casa-barra-fixa/ Mon, 21 Sep 2026 00:00:00 +0000 https://fcidade.com/en/posts/academia-em-casa-barra-fixa/ Seven wall-mounted pull-up bars in three price tiers (R$ 110 to 490): specs, reviews, what each extra real buys and which one I bought. https://fcidade.com/en/posts/golang-concurrency-select/ Sat, 08 Mar 2025 00:00:00 +0000 https://fcidade.com/en/posts/golang-concurrency-select/ This article explores the use of Select in Go to manage multiple channels. Learn how to use Select, with practical examples and exercises to reinforce the learning. https://fcidade.com/en/posts/golang-concurrency-channels/ Fri, 07 Mar 2025 11:05:00 -0300 https://fcidade.com/en/posts/golang-concurrency-channels/ This article explores the use of Channels in Go for communication and synchronization between goroutines. Learn how to use Channels, with practical examples and exercises to reinforce the learning. https://fcidade.com/en/posts/golang-concurrency-waitgroups/ Fri, 07 Mar 2025 10:05:00 -0300 https://fcidade.com/en/posts/golang-concurrency-waitgroups/ This article explores the use of Wait Groups in Go to synchronize the execution of multiple goroutines. Learn how to use Wait Groups, with practical examples and exercises to reinforce the learning. https://fcidade.com/en/posts/golang-concurrency-goroutines/ Wed, 05 Mar 2025 10:05:00 -0300 https://fcidade.com/en/posts/golang-concurrency-goroutines/ This article explores concurrency and parallelism in Go, focusing on goroutines. Learn what goroutines are, how to start them, and see practical examples and exercises to reinforce the learning. https://fcidade.com/en/posts/how-to-draw-a-pixel/ Sun, 24 Nov 2024 13:44:54 -0300 https://fcidade.com/en/posts/how-to-draw-a-pixel/ Have you ever stopped to think about how the information of a pixel is stored and displayed on the screen? The curiosity behind this has always been on my mind, and the truth is that there are several ways to do it, each with its own specifics.