how to draw a 2d rectangle in java lwjgl

You could make a cube and rotate it around, or load a texture, or handle input, or do a bunch of different things. There's a lot of directions to go from there. The good news is that once you get this far you can write classes or do some copy/paste hacking to get other shader programs working. Yes, this is a ton of work, honestly, it's a pain in the ass.

In order to draw the triangle, you need to load a vertex shader, load a fragment shader, compile both of them, link them together in a shader program, and then feed the shader program data using a Vertex Array Object (VAO), which gets its data from Vertex Buffer Objects (VBO), and then you put the data for your triangle in the VBO. Make sure you have a 'core' profile window. Go through a tutorial that has you draw a triangle on the screen using modern OpenGL, a.k.a. Get LWJGL running and put a window on the screen, with an OpenGL context, and call the following sequence: glClearColor(0.25f, 0.50f, 0.75f, 0.0f) Set up your build environment / Git / whatever, get an executable built and a README so you know what the fuck is going on five years from now when you find this strange directory on your computer. There's a few steps to get this up and running when you are doing this 'from scratch' (nothing is from scratch, says Carl Sagan, but you know what I mean). Personally I would start with LWJGL but make up your own mind. This is basically the choice for doing work in Java, the main question is whether you want to use LWJGL by itself or use something on top of it like libgdx. You will probably be writing OpenGL code using LWJGL. It's good because the libraries you need for doing this are commonly available and fairly stable, and it's bad because there are a lot of articles and tutorials out there which teach modern techniques (game -> buffers -> shaders -> pixels) and outdated techniques (game -> immediate mode -> fixed pipeline -> pixels), and it can be daunting to sort through them. What I see in the picture looks like it's probably rendered with a standard GPU pipeline for 3D graphics, with what looks like circa-2000 graphics capabilities (hey, it's the rocket laucher from Q3A!). Feedback Friday Screenshot Saturday Soundtrack Sunday Marketing Monday WIP Wednesday Daily Discussion Quarterly Showcase Related communities 1 For questions, get in touch with mods, we're happy to help you. Free assets OK, be sure to specify license. If you need to use screenshots, that's ok so long as is illustrates your issues.ĭo not solicit employment. Use discord, /r/indiegames, /r/playmygame or /r/gamedevscreens.īe specific about your question. Feedback, praise, WIP, screenshots, kickstarters, blogs, memes, 'play my game', twitch streams.

How to draw a 2d rectangle in java lwjgl