From b0dca720a83e9bf97875fc540379835863f4101d Mon Sep 17 00:00:00 2001
From: Alex-Zhang <71915735+pixel-alex@users.noreply.github.com>
Date: Fri, 31 Mar 2023 18:00:53 -0500
Subject: [PATCH] Update installation.md (#1675)

* Update installation.md

install ninja to speed up installation of tinycuda-nn

* Update installation.md

* update readme and installation
---
 README.md                       | 4 ++--
 docs/quickstart/installation.md | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index b8bea621b..ddd0873e0 100644
--- a/README.md
+++ b/README.md
@@ -101,14 +101,14 @@ For CUDA 11.3:
 
 ```bash
 pip install torch==1.12.1+cu113 torchvision==0.13.1+cu113 -f https://download.pytorch.org/whl/torch_stable.html
-pip install git+https://github.com/NVlabs/tiny-cuda-nn/#subdirectory=bindings/torch
+pip install ninja git+https://github.com/NVlabs/tiny-cuda-nn/#subdirectory=bindings/torch
 ```
 
 For CUDA 11.7:
 
 ```bash
 pip install torch==1.13.1 torchvision functorch --extra-index-url https://download.pytorch.org/whl/cu117
-pip install git+https://github.com/NVlabs/tiny-cuda-nn/#subdirectory=bindings/torch
+pip install ninja git+https://github.com/NVlabs/tiny-cuda-nn/#subdirectory=bindings/torch
 ```
 
 See [Dependencies](https://github.com/nerfstudio-project/nerfstudio/blob/main/docs/quickstart/installation.md#dependencies)
diff --git a/docs/quickstart/installation.md b/docs/quickstart/installation.md
index 32542ea9c..dafb9f0ee 100644
--- a/docs/quickstart/installation.md
+++ b/docs/quickstart/installation.md
@@ -79,10 +79,10 @@ pip install torch==1.13.1 torchvision functorch --extra-index-url https://downlo
 
 ### tinycudann
 
-After pytorch, install the torch bindings for tinycudann:
+After pytorch and ninja, install the torch bindings for tinycudann:
 
 ```bash
-pip install git+https://github.com/NVlabs/tiny-cuda-nn/#subdirectory=bindings/torch
+pip install ninja git+https://github.com/NVlabs/tiny-cuda-nn/#subdirectory=bindings/torch
 ```
 
 ## Installing nerfstudio