diff -r 6e79c1cb83e6 -r 6bcb284679d4 src/gl/vertexprogram.cpp
--- a/src/gl/vertexprogram.cpp	Wed May 25 17:48:18 2022 +0300
+++ b/src/gl/vertexprogram.cpp	Wed May 25 17:56:30 2022 +0300
@@ -37,12 +37,12 @@
 	result.reserve(12 * d2 * d2);
 	for (int i = 0; i < d2; ++i)
 	{
-		const float alpha = i * math::pi / d2;
-		const float alpha_2 = (i + 1) * math::pi / d2;
+		const float alpha = i * pi<> / d2;
+		const float alpha_2 = (i + 1) * pi<> / d2;
 		for (int j = -d2; j < d2; ++j)
 		{
-			const float beta = j * math::pi / d2;
-			const float beta_2 = (j + 1) * math::pi / d2;
+			const float beta = j * pi<> / d2;
+			const float beta_2 = (j + 1) * pi<> / d2;
 			const float x1 = cos(beta) * sin(alpha);
 			const float x2 = cos(beta) * sin(alpha_2);
 			const float x3 = cos(beta_2) * sin(alpha_2);