From b01290688728d7301dde9df9dce4a335de2420d4 Mon Sep 17 00:00:00 2001
From: Kelsi <kelsihates2fa@gmail.com>
Date: Sat, 21 Feb 2026 22:05:11 -0800
Subject: [PATCH] Add Vulkan Y-flip to projection matrix and ignore
 node_modules

Negate projection[1][1] to correct for Vulkan's Y-down NDC convention.
Also add node_modules/ to .gitignore to prevent accidental commits.
---
 .gitignore               | 1 +
 src/rendering/camera.cpp | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/.gitignore b/.gitignore
index 8e047dfe..1ece92da 100644
--- a/.gitignore
+++ b/.gitignore
@@ -89,3 +89,4 @@ ingest/
 
 # Local texture dumps / extracted art should never be committed
 assets/textures/
+node_modules/
diff --git a/src/rendering/camera.cpp b/src/rendering/camera.cpp
index 825730c0..f2edc7a7 100644
--- a/src/rendering/camera.cpp
+++ b/src/rendering/camera.cpp
@@ -18,6 +18,8 @@ void Camera::updateViewMatrix() {
 
 void Camera::updateProjectionMatrix() {
     projectionMatrix = glm::perspective(glm::radians(fov), aspectRatio, nearPlane, farPlane);
+    // Vulkan clip-space has Y pointing down; flip the projection's Y axis.
+    projectionMatrix[1][1] *= -1.0f;
 }
 
 glm::vec3 Camera::getForward() const {