Samuel Hurel IcanDivideBy0

WGSL 3D SDF Primitives

Revision: 06.08.2023, https://compute.toys/view/407

Sphere - exact

fn sdSphere(p: vec3f, r: f32) -> f32 {
  return length(p) - r;
}

This will guide you through setting up a replica set in a docker environment using.

Docker Compose
MongoDB Replica Sets
Mongoose
Mongoose Transactions

Thanks to https://gist.github.com/asoorm for helping with their docker-compose file!

Encoding Video

Installing

Install FFmpeg with homebrew. You'll need to install it with a couple flags for webm and the AAC audio codec.

brew install ffmpeg --with-libvpx --with-libvorbis --with-fdk-aac --with-opus

Modified Preorder Tree Traversal

Hierarchical data metrics that allows fast read operations on tree like structures.

Based on Left and Right fields that are set during tree traversal. When entered into node value is set to it's Left, when exiting node value is set to it's Right.

Sample implementation

	// Computes signed distance between a point and a plane
	// vPlane: Contains plane coefficients (a,b,c,d) where: ax + by + cz = d
	// vPoint: Point to be tested against the plane.
	float DistanceToPlane( vec4 vPlane, vec3 vPoint )
	{
	return dot(vec4(vPoint, 1.0), vPlane);
	}

	// Frustum cullling on a sphere. Returns > 0 if visible, <= 0 otherwise
	float CullSphere( vec4 vPlanes[6], vec3 vCenter, float fRadius )