From 380c33300292c309e42b42a0f4cd960ab10dc7d4 Mon Sep 17 00:00:00 2001
From: Tanner Collin <git@tannercollin.com>
Date: Wed, 18 Feb 2026 17:04:37 -0700
Subject: [PATCH] fix: Align YZ plane angle reference to positive Y-axis

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>
---
 src/LineTool.cpp | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/LineTool.cpp b/src/LineTool.cpp
index e0b6126..8517c95 100644
--- a/src/LineTool.cpp
+++ b/src/LineTool.cpp
@@ -58,7 +58,7 @@ void LineTool::mousePressEvent(QMouseEvent *event)
                 refDir = m_viewport->property("previousLineDirection").value<QVector3D>();
             } else {
                 if (m_viewport->currentPlane() == ViewportWidget::SketchPlane::XY || m_viewport->currentPlane() == ViewportWidget::SketchPlane::XZ) refDir = QVector3D(1, 0, 0);
-                else refDir = QVector3D(0, 0, -1);
+                else refDir = QVector3D(0, 1, 0);
             }
             QVector3D currentMouseWorldPos = m_viewport->unproject(event->pos(), m_viewport->currentPlane());
             QVector3D mouseVec = currentMouseWorldPos - startPos;
@@ -214,7 +214,7 @@ void LineTool::finalizeCreation()
             refDir = m_viewport->property("previousLineDirection").value<QVector3D>();
         } else {
             if (m_viewport->currentPlane() == ViewportWidget::SketchPlane::XY || m_viewport->currentPlane() == ViewportWidget::SketchPlane::XZ) refDir = QVector3D(1, 0, 0);
-            else refDir = QVector3D(0, 0, -1);
+            else refDir = QVector3D(0, 1, 0);
         }
         QVector3D currentMouseWorldPos = m_viewport->unproject(m_viewport->currentMousePos(), m_viewport->currentPlane());
         QVector3D mouseVec = currentMouseWorldPos - startPos;
@@ -312,7 +312,7 @@ void LineTool::paintGL()
                 if (m_viewport->currentPlane() == ViewportWidget::SketchPlane::XY || m_viewport->currentPlane() == ViewportWidget::SketchPlane::XZ) {
                     refDir = QVector3D(1, 0, 0);
                 } else { // YZ
-                    refDir = QVector3D(0, 0, -1);
+                    refDir = QVector3D(0, 1, 0);
                 }
             }
 
@@ -410,7 +410,7 @@ void LineTool::paintGL()
                     refDir = m_viewport->property("previousLineDirection").value<QVector3D>();
                 } else {
                     if (m_viewport->currentPlane() == ViewportWidget::SketchPlane::XY || m_viewport->currentPlane() == ViewportWidget::SketchPlane::XZ) refDir = QVector3D(1, 0, 0);
-                    else refDir = QVector3D(0, 0, -1);
+                    else refDir = QVector3D(0, 1, 0);
                 }
 
                 if (angleFromInput) {
@@ -647,7 +647,7 @@ void LineTool::paint2D(QPainter& painter, const QMatrix4x4& modelView, const QMa
                 if (m_viewport->currentPlane() == ViewportWidget::SketchPlane::XY || m_viewport->currentPlane() == ViewportWidget::SketchPlane::XZ) {
                     refDir = QVector3D(1, 0, 0);
                 } else { // YZ
-                    refDir = QVector3D(0, 0, -1);
+                    refDir = QVector3D(0, 1, 0);
                 }
             }
 
@@ -733,7 +733,7 @@ void LineTool::paint2D(QPainter& painter, const QMatrix4x4& modelView, const QMa
                 refDir = m_viewport->property("previousLineDirection").value<QVector3D>();
             } else {
                 if (m_viewport->currentPlane() == ViewportWidget::SketchPlane::XY || m_viewport->currentPlane() == ViewportWidget::SketchPlane::XZ) refDir = QVector3D(1, 0, 0);
-                else refDir = QVector3D(0, 0, -1);
+                else refDir = QVector3D(0, 1, 0);
             }
 
             QVector3D currentMouseWorldPosForText = m_viewport->unproject(m_viewport->currentMousePos(), m_viewport->currentPlane());