From 991cf9df7e4505a6aa43a2a999049f15af3f9a41 Mon Sep 17 00:00:00 2001
From: Kae <80987908+Novaenia@users.noreply.github.com>
Date: Thu, 12 Oct 2023 04:42:24 +1100
Subject: Add vertical speed support to parallax layers

---
 source/rendering/StarEnvironmentPainter.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'source/rendering/StarEnvironmentPainter.cpp')

diff --git a/source/rendering/StarEnvironmentPainter.cpp b/source/rendering/StarEnvironmentPainter.cpp
index ff6cb35..c938ae0 100644
--- a/source/rendering/StarEnvironmentPainter.cpp
+++ b/source/rendering/StarEnvironmentPainter.cpp
@@ -256,10 +256,14 @@ void EnvironmentPainter::renderParallaxLayers(
 
     // texture offset in *screen pixel space*
     Vec2F parallaxOffset = layer.parallaxOffset * camera.pixelRatio();
-    if (layer.speed != 0) {
-      double drift = fmod((double)layer.speed * (sky.epochTime / (double)sky.dayLength), (double)parallaxSize[0]);
+    if (layer.speed[0] != 0) {
+      double drift = fmod((double)layer.speed[0] * (sky.epochTime / (double)sky.dayLength), (double)parallaxSize[0]);
       parallaxOffset[0] = fmod(parallaxOffset[0] + drift * camera.pixelRatio(), parallaxPixels[0]);
     }
+    if (layer.speed[1] != 0) {
+      double drift = fmod((double)layer.speed[1] * (sky.epochTime / (double)sky.dayLength), (double)parallaxSize[1]);
+      parallaxOffset[1] = fmod(parallaxOffset[1] + drift * camera.pixelRatio(), parallaxPixels[1]);
+    }
 
     // parallax camera world position in *parallax space*
     Vec2F parallaxCameraCenter = parallaxWorldPosition - parallaxOrigin;
-- 
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