From 9a73a883df6209e37d3ffb81cb1a29e374694569 Mon Sep 17 00:00:00 2001
From: Kai Blaschke <kai.blaschke@kb-dev.net>
Date: Wed, 8 Nov 2023 00:14:27 +0100
Subject: [PATCH] Use our own Pi constant, as the Windows cmath header doesn't
 have the definition.

---
 src/libprojectM/Renderer/PresetTransition.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/libprojectM/Renderer/PresetTransition.cpp b/src/libprojectM/Renderer/PresetTransition.cpp
index 141a90079..8fa903f3f 100644
--- a/src/libprojectM/Renderer/PresetTransition.cpp
+++ b/src/libprojectM/Renderer/PresetTransition.cpp
@@ -6,6 +6,8 @@
 #include <cmath>
 #include <cstddef>
 
+constexpr double PI = 3.14159265358979323846;
+
 PresetTransition::PresetTransition(const std::shared_ptr<Shader>& transitionShader, double durationSeconds)
     : m_transitionShader(transitionShader)
     , m_durationSeconds(durationSeconds)
@@ -59,7 +61,7 @@ void PresetTransition::Draw(const Preset& oldPreset,
     if (m_durationSeconds > 0.0)
     {
         linearProgress = secondsSinceStart / m_durationSeconds;
-        cosineProgress = (-std::cos(linearProgress * M_PI) + 1.0) * 0.5;
+        cosineProgress = (-std::cos(linearProgress * PI) + 1.0) * 0.5;
         bicubicProgress = linearProgress < 0.5 ? 4.0 * linearProgress * linearProgress * linearProgress : 1.0 - pow(-2.0 * linearProgress + 2.0, 3.0) / 2.0;
     }