A quick heads up that I’ll be releasing a new OpenGL (ES) tutorial series soon. It’ll take you from zero through to rendering a simple 3D scene with lighting.I’ve been posting tutorials to this blog, but they’ve all been AmigaOS specific. While this nicely complements the Warp3D Nova project I’m working on, most people will […]
Yes, I’ve discovered another bug in one of the Warp3D Nova tutorials. The tutorial itself has been corrected already, but let’s take a closer look at this bug. The problem is with this line of code: // Transform the normal normal = normalize(NormalMatrix * vec4(vertNormal, 1.0)).xyz; Can you see the mistake? It’s a really subtle […]
The author of AmiCraftNova recently released a new demo called StarBoxDemo. While everyone has been posting new fps benchmarks with it, how it uses shaders should be of greater interest to aspiring developers. So download the demo (if you haven’t already), and take a look in the Shaders directory.The big advantage of shaders is that you […]
Recently, the AmiCraftNova author was having issues with GLSL shaders, which got me thinking about how to debug them. Shaders need debugging, but standard debugging tools can’t be used. So here are a few tips (for both OpenGL and Warp3D Nova). Check the Compiler Logs Both OpenGL and Warp3D Nova provide compilation logs. So check […]
Spam and captchas; two really annoying things. One (spam) is the reason why the other (captchas) exists. Today I made the switch from Mollom to Google’s reCaptcha, and here’s why.Last week I asked people to post their Cow3D benchmark results in the comments, and that exposed a problem. Some reported that it was impossible to […]
Alain Thellier recently ported his Cow3D demo/test-program to Warp3D Nova, which allows Warp3D Nova and Warp3D to be compared. Results have been coming in thick and fast, along with speculations as to why the results are what they are. I was expecting Nova to deliver a larger boost, and it actually does; it’s just partially hidden. […]
Yes, it’s that time of year again. I wish you all a wonderful and Merry Christmas and a happy new year.I have no idea what your year has been like; what fun you’ve had and what challenges you’ve faced. Hopefully you can look back on 2016 and have many things to be grateful for. May […]
The previous tutorial’s source-code included animation, but I said that would be a topic for another day. Well, today is that day. I’m going to go through the code I added to animate the cube. IMPORTANT: While this tutorial is about Warp3D Nova, the animation code below is almost 100% generic. You could reuse it to […]
Today I’m going to show you another way to draw coloured triangles with OpenGL (ES). It’ll look less interesting than the previous tutorial’s method. However, it’s a good way to introduce using multiple vertex attributes and you’ll need that for almost everything from here on out.Per Vertex ColourAs the name suggests, vertex attributes are “attributes […]
Time to put the theory learnt last time into practise. This means turning the phong model into shader code, and feeding the GPU the extra data required (surface normals, light/material properties, etc.).Step 1: Copy the Previous Tutorial’s CodeAs usual we’ll kickstart the process by reusing the previous tutorial’s code. So download the code now, and […]
