thingsiamdoing.com

ThingsIAmDoing

Today I'll be writing about the implementation of kd-trees. A kd-tree (short for k-dimensional tree) is a type of spacial partitioning data structure, and a special case of BSP trees. What's the point of it? Well, it can be used to organize a vast number of points in space in such a way that searching for the nearest point to a certain coordinate, for example, is far quicker than more traditional methods. Which can greatly increase the realism of a scene. A 1 Dimensional Kd-Tree. So how does it work?

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Today I'll be writing about the implementation of kd-trees. A kd-tree (short for k-dimensional tree) is a type of spacial partitioning data structure, and a special case of BSP trees. What's the point of it? Well, it can be used to organize a vast number of points in space in such a way that searching for the nearest point to a certain coordinate, for example, is far quicker than more traditional methods. Which can greatly increase the realism of a scene. A 1 Dimensional Kd-Tree. So how does it work?

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4 ray tracing series

5 kd tree implementation

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7 and diffuse inter reflection

8 kd tree creation code

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ThingsIAmDoing | thingsiamdoing.com Reviews

https://thingsiamdoing.com

Today I'll be writing about the implementation of kd-trees. A kd-tree (short for k-dimensional tree) is a type of spacial partitioning data structure, and a special case of BSP trees. What's the point of it? Well, it can be used to organize a vast number of points in space in such a way that searching for the nearest point to a certain coordinate, for example, is far quicker than more traditional methods. Which can greatly increase the realism of a scene. A 1 Dimensional Kd-Tree. So how does it work?

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thingsiamdoing.com

1

April | 2014 | ThingsIAmDoing

http://thingsiamdoing.com/2014/04

Monthly Archives: April 2014. Ray Tracing: Part 2. So we've now got a basic ray-tracer which should be able to render some coloured circles on a blank background. Exciting, eh? Next up is defining a light source, shading the spheres, and casting shadows. To calculate the percentage of light incident on the surface of our sphere, we can use the dot product. The dot product is defined as:. Here's the lambertian shading added onto the pseudo code from the last post:. Create a canvas to draw on to. For(every...

2

Charlie | ThingsIAmDoing

http://thingsiamdoing.com/author/admin

Image deconvolution aka "Why it's unsafe to blur sensitive information". Day in, day out, people share images containing sensitive information online, and choose to synthetically "blur out" the parts they do not wish to share in Photoshop or some other software. This is a bad idea, as I'm going to demonstrate. Some blurred information (with noise added). No, me neither. Yet. Operation. The convolution of a source image, s(x,y). With a "blur kernel". Will give us our blurry output image, g(x,y). With no a...

3

Acoustics | ThingsIAmDoing

http://thingsiamdoing.com/category/acoustics

I recently decided to try writing a 2d acoustic modelling program. It's still a massive work in progress, but it's already quite interesting to experiment with. First up, some theory! Feel free to skip to the bolded text if you're not so interested in derivations). The equation for the acoustic pressure fluctuations caused by the sphere as a function of radial distance r is given by:. Is instead written as a volume velocity. It's possible to take the limit. Constant. The result? Daries (currently with n.

4

Intro to Ray Tracing | ThingsIAmDoing

http://thingsiamdoing.com/intro-to-ray-tracing

Intro to Ray Tracing. I've always wanted to write a ray tracer and this week seemed like a reasonable time to do it! A ray tracer is a program which generates (hopefully) photo-realistic images by casting "light rays" through a number of points/pixels on an imaginary plane in a 3d world, then using information from this ray to set a corresponding point on that ray to the correct colour. Figure 1 depicts and example of this. Figure 1. Basics of Ray Tracing. So, where do you start? Dist to plane *. It then...

5

Introduction: My post-apocalyptic Dungeon Crawler game | ThingsIAmDoing

http://thingsiamdoing.com/introduction-my-post-apocalyptic-dungeon-crawler-game

Introduction: My post-apocalyptic Dungeon Crawler game. Recently I've been working on a rogue-like dungeon crawler game based in a subway system in a post-apocalyptic world. It's being made in Gamemaker. A fantastic game engine/creation tool, based on a great scripting language, which can export to any platform you could possibly want to (Android, Ios, Windows, Linux, MacOs, Tizen. etc). For now, some screenshots! Numerous room types supported. This entry was posted in Programming. January 17, 2014.

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thingsiamdoing.com

ThingsIAmDoing

Today I'll be writing about the implementation of kd-trees. A kd-tree (short for k-dimensional tree) is a type of spacial partitioning data structure, and a special case of BSP trees. What's the point of it? Well, it can be used to organize a vast number of points in space in such a way that searching for the nearest point to a certain coordinate, for example, is far quicker than more traditional methods. Which can greatly increase the realism of a scene. A 1 Dimensional Kd-Tree. So how does it work?

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Things I Am Grateful For | What Good Is Gratitude Without An Audience?

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