From afe688e6ab3e021feca8c398d31469109a32a41b Mon Sep 17 00:00:00 2001
From: vaxerski <43317083+vaxerski@users.noreply.github.com>
Date: Sat, 26 Nov 2022 19:37:20 +0000
Subject: [PATCH] allow 360 degrees of freedom in gradients

---
 src/render/OpenGL.cpp         |  2 +-
 src/render/shaders/Border.hpp | 19 ++++++++++++++++++-
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/render/OpenGL.cpp b/src/render/OpenGL.cpp
index 5a4ccca6..2d9f9314 100644
--- a/src/render/OpenGL.cpp
+++ b/src/render/OpenGL.cpp
@@ -852,7 +852,7 @@ void CHyprOpenGLImpl::renderBorder(wlr_box* box, const CGradientValueData& grad,
 
     glUniform4fv(m_RenderData.pCurrentMonData->m_shBORDER1.gradient, grad.m_vColors.size(), (float*)grad.m_vColors.data());
     glUniform1i(m_RenderData.pCurrentMonData->m_shBORDER1.gradientLength, grad.m_vColors.size());
-    glUniform1f(m_RenderData.pCurrentMonData->m_shBORDER1.angle, grad.m_fAngle);
+    glUniform1f(m_RenderData.pCurrentMonData->m_shBORDER1.angle, (int)(grad.m_fAngle / (PI / 180.0)) % 360 * (PI / 180.0));
     glUniform1f(m_RenderData.pCurrentMonData->m_shBORDER1.alpha, a);
 
     wlr_box transformedBox;
diff --git a/src/render/shaders/Border.hpp b/src/render/shaders/Border.hpp
index fc48e108..c2be9880 100644
--- a/src/render/shaders/Border.hpp
+++ b/src/render/shaders/Border.hpp
@@ -23,7 +23,24 @@ vec4 getColorForCoord(vec2 normalizedCoord) {
     if (gradientLength < 2)
         return gradient[0];
 
-    float sine = sin(angle);
+    float finalAng = 0.0;
+
+    if (angle > 4.71 /* 270 deg */) {
+        normalizedCoord[1] = 1.0 - normalizedCoord[1];
+        finalAng = 6.28 - angle;
+    } else if (angle > 3.14 /* 180 deg */) {
+        normalizedCoord[0] = 1.0 - normalizedCoord[0];
+        normalizedCoord[1] = 1.0 - normalizedCoord[1];
+        finalAng = angle - 3.14;
+    } else if (angle > 1.57 /* 90 deg */) {
+        normalizedCoord[0] = 1.0 - normalizedCoord[0];
+        finalAng = 3.14 - angle;
+    } else {
+        finalAng = angle;
+    }
+
+    float sine = sin(finalAng);
+
     float progress = (normalizedCoord[1] * sine + normalizedCoord[0] * (1.0 - sine)) * float(gradientLength - 1);
     int bottom = int(floor(progress));
     int top = bottom + 1;