Creative technologist and technical leader. Real-time 3D, 3D capture, machine learning.https://johnsietsma.com/https://johnsietsma.com/posts/flow-maps/https://johnsietsma.com/posts/flow-maps/Flow maps are a simple way to get some movement into your shader. ValveMon, 30 Nov 2015 14:00:00 GMThttps://johnsietsma.com/posts/fluid-flow-shadertoy/https://johnsietsma.com/posts/fluid-flow-shadertoy/Following on from my previous Flow Map post, I wanted to see what flow maps would look like with maps generated in real time using a fluid sim.Tue, 12 Apr 2016 14:00:00 GMThttps://johnsietsma.com/posts/fluids-threejs/https://johnsietsma.com/posts/fluids-threejs/Here is a proof of concept of using a 2D fluid simluation to generate a Flow Map. This follows on from my Fluid/Flow Map ShaderToy experiment to do the ...Wed, 13 Apr 2016 14:00:00 GMThttps://johnsietsma.com/posts/infinite-points-introduction/https://johnsietsma.com/posts/infinite-points-introduction/It's becoming more and more common to use photogrammetry and lidar scanning to capture buildings, engineering projects, sites of cultural significance, ...Thu, 28 Nov 2019 14:00:00 GMThttps://johnsietsma.com/posts/mordon-burst/https://johnsietsma.com/posts/mordon-burst/(Part of a series where I think out loud about an out-of-core point cloud renderer I'm working on.)Thu, 12 Dec 2019 14:00:00 GMThttps://johnsietsma.com/posts/morton-order-introduction/https://johnsietsma.com/posts/morton-order-introduction/For the out-of-core point cloud renderer I'm working on I need a way to convert a node coordinate into an array index. The idea is all nodes in a layer ...Wed, 04 Dec 2019 14:00:00 GMThttps://johnsietsma.com/posts/native-sparse-array/https://johnsietsma.com/posts/native-sparse-array/(Part of a series where I think out loud about an out-of-core point cloud renderer I'm working on.)Wed, 01 Jan 2020 14:00:00 GMThttps://johnsietsma.com/posts/nativeint/https://johnsietsma.com/posts/nativeint/The NativeContainerIsAtomicWriteOnly attribute is required for use in IJobParallelFor, but it also means the container is marked as write only! If you u...Thu, 06 Feb 2020 14:00:00 GMThttps://johnsietsma.com/posts/physical-camera-component/https://johnsietsma.com/posts/physical-camera-component/Unity HDRP has a physical section on it's camera component. It mimics real-life camera settings like sensor, size, ISO, focal length and aperture. These...Sun, 19 Jul 2020 14:00:00 GMThttps://johnsietsma.com/posts/text-generation-for-jobs/https://johnsietsma.com/posts/text-generation-for-jobs/You have a NativeArray of floats and and want to add a number to each element. You make an addition job. Easy!Sun, 19 Jan 2020 14:00:00 GMThttps://johnsietsma.com/posts/threejs/https://johnsietsma.com/posts/threejs/The three.js introduction introduction for setting up a scene suggests you dynamicallySun, 29 Nov 2015 14:00:00 GMT