From e998f61d2cb612eb292b1a9b910bbd15aa3534fb Mon Sep 17 00:00:00 2001
From: 0penBrain <48731257+0penBrain@users.noreply.github.com>
Date: Wed, 17 Nov 2021 17:07:57 +0100
Subject: [PATCH] [Gui] Render corner cross lines with thin polygons so it can
 be scaled

---
 src/Gui/View3DInventorViewer.cpp | 30 ++++++++++++++++++++++++++----
 1 file changed, 26 insertions(+), 4 deletions(-)

diff --git a/src/Gui/View3DInventorViewer.cpp b/src/Gui/View3DInventorViewer.cpp
index 08c9500dd1..7befb531d8 100644
--- a/src/Gui/View3DInventorViewer.cpp
+++ b/src/Gui/View3DInventorViewer.cpp
@@ -3451,11 +3451,33 @@ void View3DInventorViewer::drawAxisCross(void)
 // Draw an arrow for the axis representation directly through OpenGL.
 void View3DInventorViewer::drawArrow(void)
 {
-    glBegin(GL_LINES);
-    glVertex3f(0.0f, 0.0f, 0.0f);
-    glVertex3f(1.0f, 0.0f, 0.0f);
-    glEnd();
     glDisable(GL_CULL_FACE);
+    glBegin(GL_QUADS);
+    glVertex3f(0.0f, -0.02f, 0.02f);
+    glVertex3f(0.0f, 0.02f, 0.02f);
+    glVertex3f(1.0f - 1.0f / 3.0f, 0.02f, 0.02f);
+    glVertex3f(1.0f - 1.0f / 3.0f, -0.02f, 0.02f);
+
+    glVertex3f(0.0f, -0.02f, -0.02f);
+    glVertex3f(0.0f, 0.02f, -0.02f);
+    glVertex3f(1.0f - 1.0f / 3.0f, 0.02f, -0.02f);
+    glVertex3f(1.0f - 1.0f / 3.0f, -0.02f, -0.02f);
+
+    glVertex3f(0.0f, -0.02f, 0.02f);
+    glVertex3f(0.0f, -0.02f, -0.02f);
+    glVertex3f(1.0f - 1.0f / 3.0f, -0.02f, -0.02f);
+    glVertex3f(1.0f - 1.0f / 3.0f, -0.02f, 0.02f);
+
+    glVertex3f(0.0f, 0.02f, 0.02f);
+    glVertex3f(0.0f, 0.02f, -0.02f);
+    glVertex3f(1.0f - 1.0f / 3.0f, 0.02f, -0.02f);
+    glVertex3f(1.0f - 1.0f / 3.0f, 0.02f, 0.02f);
+
+    glVertex3f(0.0f, 0.02f, 0.02f);
+    glVertex3f(0.0f, 0.02f, -0.02f);
+    glVertex3f(0.0f, -0.02f, -0.02f);
+    glVertex3f(0.0f, -0.02f, 0.02f);
+    glEnd();
     glBegin(GL_TRIANGLES);
     glVertex3f(1.0f, 0.0f, 0.0f);
     glVertex3f(1.0f - 1.0f / 3.0f, +0.5f / 4.0f, 0.0f);