Clone the sources: git clone --recurse-submodules github.com/emeiri/ogldev.git If you want to get the same version that was used in the video you can checkout the tag 'TERRAIN1'. Build on Linux: cd ogldev/Terrain1 && ./build.sh Build on Windows: Open the Visual Studio solution: ogldev\Windows\ogldev_vs_2022\ogldev_vs_2022.sln Build the project TerrainRendering\Terrain1 Things to try: 1. In this video I describe how to load the heightmap file from a raw file of floating points. It is also common to store heightmaps in gray scale png/jpeg files. Add support for loading such files using STB image (more info on STB in the texture mapping tutorial: th-cam.com/video/n8t7nvHCqek/w-d-xo.html 2. (Advanced) If you take a closer look at the TriangleList class you will find more stuff that can be shared between OpenGL and other APIs such as DirectX (both APIs support the same topology types). Refactor the API specific stuff (create/bind buffer handles, etc) into a derived class while leaving the common functionality of populating the index/vertex vectors in the base class. This will make it ready for future porting to DirectX.
@OGLDEV, Very advanced my friend! I hope you can also talk about barycentric coordinates for placement of objects and the actual elephant in the room so to speak, generating grids via Tessellation shaders! 👍👍
Thanks! In this series I'm sticking to the book so it will not include Tessellation since it didn't exist at the time, but will definitely cover it later on, for terrain as well as other usages.
Thank you for your helpful video and lesson, though I was wondering what file format should I use for the the heightmap? Can I use the Soil image loading library for reading the heightmap data? Thank you so much 👍
You're welcome :-) Do you mean that you want to save the heightmap that was generated by the code? You can use any file format that the library supports (jpg, png, etc). The SOIL library should work ok.
@OGLDEV I mean, can I use greyscale 8 bit image from for example Gimp(or tangram), then load it with gimp, or is the heightmap file a special one that we need to generate ourselves? I ask because I am getting zigzag pattern over terrain and it's not looking correct. Thank you so much for the help and your reply🤝
In this series we learn two algorithms for generating random terrains (more in the future). In the first video we create the framework for loading the heightmap from a raw binary file of floating point numbers which is how we store the heightmap in memory. If you want to import a heightmap from a greyscale 8 bit image you can use SOIL to load the file. I assume you will get back a char array and the dimensions. You can then convert this array to an array of floats and render it with the tutorial code. Perhaps SOIL is able to load images directly as floating points and then you can save some of the hassle. Gimp is not part of the process. You can use it if you want to manually modify the heightmap image.
Hi, I saw you on reddit :) This is episode one but it seems you aleady have a lot written such as terrain functions etc.Did you build this code base up in earlier tutorials elsewhere? Or should I just make my own version of this.
Some of the more generic stuff like textures, shaders, etc is based on the 'OpenGL for beginners' playlist on my channel but if you are already familiar with this stuff you can jump right into the 'Terrain Rendering' series with this episode. All the terrain specific code is created during the series.
I find very little advantage in those two features. I doubt they would make my code cleaner or more robust. And C++ casts are simply ugly so I avoid them.
Any idea why I don't get anything to render after introducing Index Buffer and converting to the triangles instead of points? Was working perfectly up until that point. Could this be related to left/right hand coordinate system?
Probably not the coordinate system unless you flipped the index order compared to what was working in the non indexed case. There can be multiple problems - not using glDrawElements correctly, forgot to bind the index buffer, indices not referencing the correct vertices, etc. Try to get one point rendered correctly using GL_POINTS and then switch back to triangles and render a single triangle.
this is a solid introduction and im really grateful that you shared this knowledge , thank you OGLDEV.:))
Glad it was helpful!
You just keep coming out with the hits man. Thanks again!
You're welcome! Enjoy!
Let's goo, been waiting for this 🔥
Clone the sources:
git clone --recurse-submodules github.com/emeiri/ogldev.git
If you want to get the same version that was used in the video you can checkout the tag 'TERRAIN1'.
Build on Linux:
cd ogldev/Terrain1 && ./build.sh
Build on Windows:
Open the Visual Studio solution: ogldev\Windows\ogldev_vs_2022\ogldev_vs_2022.sln
Build the project TerrainRendering\Terrain1
Things to try:
1. In this video I describe how to load the heightmap file from a raw file of floating points.
It is also common to store heightmaps in gray scale png/jpeg files. Add support for loading such
files using STB image (more info on STB in the texture mapping tutorial: th-cam.com/video/n8t7nvHCqek/w-d-xo.html
2. (Advanced) If you take a closer look at the TriangleList class you will find more stuff that can be shared
between OpenGL and other APIs such as DirectX (both APIs support the same topology types). Refactor the API specific
stuff (create/bind buffer handles, etc) into a derived class while leaving the common functionality of populating
the index/vertex vectors in the base class. This will make it ready for future porting to DirectX.
You are my hero.
Thanks!
Good video, simple, clear, step by step. ❤❤
Thank you! 🙂
@OGLDEV, Very advanced my friend! I hope you can also talk about barycentric coordinates for placement of objects and the actual elephant in the room so to speak, generating grids via Tessellation shaders! 👍👍
Thanks! In this series I'm sticking to the book so it will not include Tessellation since it didn't exist at the time, but will definitely cover it later on, for terrain as well as other usages.
thank you for your videos
You're welcome!
I've been waiting...
I can't believe I happened upon this. 🙏
:-)
Thank you for your helpful video and lesson, though I was wondering what file format should I use for the the heightmap? Can I use the Soil image loading library for reading the heightmap data? Thank you so much 👍
You're welcome :-) Do you mean that you want to save the heightmap that was generated by the code? You can use any file format that the library supports (jpg, png, etc). The SOIL library should work ok.
@OGLDEV I mean, can I use greyscale 8 bit image from for example Gimp(or tangram), then load it with gimp, or is the heightmap file a special one that we need to generate ourselves? I ask because I am getting zigzag pattern over terrain and it's not looking correct. Thank you so much for the help and your reply🤝
In this series we learn two algorithms for generating random terrains (more in the future). In the first video we create the framework for loading the heightmap from a raw binary file of floating point numbers which is how we store the heightmap in memory. If you want to import a heightmap from a greyscale 8 bit image you can use SOIL to load the file. I assume you will get back a char array and the dimensions. You can then convert this array to an array of floats and render it with the tutorial code. Perhaps SOIL is able to load images directly as floating points and then you can save some of the hassle. Gimp is not part of the process. You can use it if you want to manually modify the heightmap image.
Hi, I saw you on reddit :) This is episode one but it seems you aleady have a lot written such as terrain functions etc.Did you build this code base up in earlier tutorials elsewhere? Or should I just make my own version of this.
Some of the more generic stuff like textures, shaders, etc is based on the 'OpenGL for beginners' playlist on my channel but if you are already familiar with this stuff you can jump right into the 'Terrain Rendering' series with this episode. All the terrain specific code is created during the series.
Pretty sure Trent was in highschool when he wrote that book.
Very true.
Man, your code looks like you live in 1998 🤣
But your videos are amazing! 👍
Why 1998?
@@OGLDEV You know, the NULL macros, and some other things like C style casts, etc
I find very little advantage in those two features. I doubt they would make my code cleaner or more robust. And C++ casts are simply ugly so I avoid them.
@@kishirisu1268 lol
Any idea why I don't get anything to render after introducing Index Buffer and converting to the triangles instead of points? Was working perfectly up until that point. Could this be related to left/right hand coordinate system?
Probably not the coordinate system unless you flipped the index order compared to what was working in the non indexed case. There can be multiple problems - not using glDrawElements correctly, forgot to bind the index buffer, indices not referencing the correct vertices, etc. Try to get one point rendered correctly using GL_POINTS and then switch back to triangles and render a single triangle.
If anyone had the same problem, I found the problem I had: instead of indices.resize() I, for some reason, used indices.reserve()
Good catch. If you plan to use the [] operator use resize. If you plan to use insert/push_back use reserve.
@@OGLDEV Thank you so much for such a quick reply!
@@nerijusvilcinskas7851 You're welcome :-)
hey, i got the book in the ttutorial but trenk, can I go through this to create some terrain or is it too old for only the book and opengl?
The book uses the old fixed function pipeline. In my videos I'm implementing the algorithms using modern OpenGL and shaders.
@@OGLDEVthanks man, appreciate u getting back. never forget the small man when you're big man in 2024 haha.
:-)