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@dwilliamson
dwilliamson / gist:e9b1ba3c684162c5a931
Last active December 20, 2021 19:38
Workflow for using git subtree on Windows
To include a library as a subtree, follow these steps:
1. Add the project as a remote
git remote add <remote-name> <source-repo>
2. Fetch the remote
git fetch <remote-name>
3. Add the project
git subtree add --prefix "path/to/project" <remote-name> <remote-branch-name> --squash
@transitive-bullshit
transitive-bullshit / billboard_sao.frag
Created September 30, 2013 21:08
WebGL GLSL SAO (Scalable Ambient Obscurance) fragment shader. SAO is a more efficient method for computing SSAO (Screen-Space Ambient Occlusion). Converts the g-buffer to an occlusion buffer which estimates local ambient occlusion at each fragment in screen-space. For details on the technique itself, see: McGuire et al [12] http://graphics.cs.wi…
// total number of samples at each fragment
#define NUM_SAMPLES {{ numSamples }}
#define NUM_SPIRAL_TURNS {{ numSpiralTurns }}
#define USE_ACTUAL_NORMALS {{ useActualNormals }}
#define VARIATION {{ variation }}
uniform sampler2D sGBuffer;
@aras-p
aras-p / ImportMeshUtility.cpp
Created May 31, 2012 15:01
Unity tangent space calculation
// THIS IS ONLY A PORTION OF THE FILE
// WILL NOT COMPILE OUT OF THE BOX!
void OrthogonalizeTangent (TangentInfo& tangentInfo, Vector3f normalf, Vector4f& outputTangent)
{
TangentInfo::Vector3d normal = { normalf.x, normalf.y, normalf.z };
TangentInfo::Vector3d tangent = tangentInfo.tangent;
TangentInfo::Vector3d binormal = tangentInfo.binormal;
@jboner
jboner / latency.txt
Last active September 9, 2025 11:52
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD