You may have noticed Vulkan offers vkMergePipelineCaches. The reason behind this (or at least, one of the reasons) is extreme concurrency (Amdahl’s Law). However, most people create just one VkPipelineCache for the entire app and then forget about. Specially because of how simple it is to setup just one VkPipelineCache […]
So I’ve been working into integrating Qt Quick (QML) and OgreNext when using the Vulkan RenderSystem for use in Gazebo. Note that I’m talking about Qt Quick. The ‘stable’ Qt Widgets interface (which uses QVulkanWindow) doesn’t have this problem because it’s too simple. There are various ways to perform an […]
Ok that was a flashy clickbait-y title! What? You didn’t like it? I’m proud of that one! So I recently tried to implement 16-bit floats into our shaders. I knew it was untested. What I was not prepared is… how untested everything is! We use macros like #define midf min16float. […]
If you browse the capabilities of the GeForce 1080, you’ll notice it exposes 8 memory types on heap 1 If you browse an even older GeForce GTX 680, you’ll notice it exposes 2 memory types on heap 0 and 8 memory types on heap 1, often with propertyFlags = 0 […]
I’m adding this as a reminder for myself. To get ASAN to work with Ignition Gazebo we first need to modify CMakeLists.txt to build with ASAN. For every module (e.g. ign-gazebo, ign-rendering, ign-gui, etc) you wish to have full ASAN analysis, write this at the top of each CMakeLists.txt: Running […]
By default RenderDoc only downloads resources used by the frame being captured. Resources not used during that frame are not saved. Unless ‘Ref. All Resources’ is enabled, that is. I recently fixed a bug in Ogre where Ref. All Resources would randomly corrupt GPU memory after capture; both in my […]
Because Ogre uses Mercurial hosted on Bitbucket, and Mercurial is being removed, this guide is aimed to helping our users to migrate as painless as possible. Git differences We need to explain a few differences from hg to git. If you’re a git expert, you can skip this section. The first main difference is that hg treats the repo history as immutable. Only advanced operations (which must be explicitly enabled) can manipulate history. And doing […]
Welcome to the final of this 2-part series!. You can find Vertex Formats Part 1: Compression Another issue that seems to be loose in understanding is how GPUs are shaping up in the future. Traditionally, vertex formats were “push”. That means the vertex data was forced into the shader as input, […]
So, I tweeted What I just did: “Switch to SNORM16 for position and multiply the vertex by 64.0 when rendering the player’s cockpit for enough precision” – Me, right now: https://www.youtube.com/watch?v=Tnod9vtB4xA And that sparked waaay more attention than I thought. But it also made me realize lots of devs have incomplete […]
Around 5 months ago I upgraded from Ubuntu 14.04 to 16.04. Little did I know fglrx was no longer supported (the proprietary binary driver blob from AMD) and at that time the AMDGPU Pro driver (the new proprietary driver with an open source kernel driver) for GCN 1.0 cards was […]
