diff --git a/src/ViewportWidget.cpp b/src/ViewportWidget.cpp
index 1e41bb6..ecf605c 100644
--- a/src/ViewportWidget.cpp
+++ b/src/ViewportWidget.cpp
@@ -137,8 +137,39 @@ void ViewportWidget::paintGL()
         }
     }
 
+    if (m_isSnappingOrigin) {
+        const float rectSize = 0.2f;
+        glColor4f(1.0, 1.0, 0.0, 0.5f);
+        glEnable(GL_BLEND);
+        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+        glBegin(GL_QUADS);
+        if (m_currentPlane == SketchPlane::XY) {
+            glVertex3f(-rectSize, -rectSize, 0);
+            glVertex3f( rectSize, -rectSize, 0);
+            glVertex3f( rectSize,  rectSize, 0);
+            glVertex3f(-rectSize,  rectSize, 0);
+        } else if (m_currentPlane == SketchPlane::XZ) {
+            glVertex3f(-rectSize, 0, -rectSize);
+            glVertex3f( rectSize, 0, -rectSize);
+            glVertex3f( rectSize, 0,  rectSize);
+            glVertex3f(-rectSize, 0,  rectSize);
+        } else if (m_currentPlane == SketchPlane::YZ) {
+            glVertex3f(0, -rectSize, -rectSize);
+            glVertex3f(0,  rectSize, -rectSize);
+            glVertex3f(0,  rectSize,  rectSize);
+            glVertex3f(0, -rectSize,  rectSize);
+        }
+        glEnd();
+        glDisable(GL_BLEND);
+    }
+
     if (m_isDefiningLine && m_activeTool == static_cast<int>(ApplicationController::ToolType::Line)) {
         QVector3D worldPos = unproject(m_currentMousePos);
+        if (m_isSnappingOrigin) {
+            worldPos.setX(0);
+            worldPos.setY(0);
+            worldPos.setZ(0);
+        }
         glBegin(GL_LINES);
         glColor3f(1.0, 1.0, 0.0);
         glVertex3d(m_firstLinePoint.X(), m_firstLinePoint.Y(), m_firstLinePoint.Z());
@@ -175,8 +206,13 @@ void ViewportWidget::resizeGL(int w, int h)
 void ViewportWidget::mousePressEvent(QMouseEvent *event)
 {
     if (event->button() == Qt::LeftButton && m_currentPlane != SketchPlane::NONE && m_activeTool == static_cast<int>(ApplicationController::ToolType::Line)) {
-        QVector3D worldPos = unproject(event->pos());
-        gp_Pnt p(worldPos.x(), worldPos.y(), worldPos.z());
+        gp_Pnt p;
+        if (m_isSnappingOrigin) {
+            p.SetCoord(0, 0, 0);
+        } else {
+            QVector3D worldPos = unproject(event->pos());
+            p.SetCoord(worldPos.x(), worldPos.y(), worldPos.z());
+        }
 
         if (!m_isDefiningLine) {
             m_firstLinePoint = p;
@@ -194,6 +230,19 @@ void ViewportWidget::mousePressEvent(QMouseEvent *event)
 void ViewportWidget::mouseMoveEvent(QMouseEvent *event)
 {
     m_currentMousePos = event->pos();
+
+    bool shouldSnap = false;
+    if (m_currentPlane != SketchPlane::NONE) {
+        QVector3D worldPos = unproject(m_currentMousePos);
+        const float snapThreshold = 0.5f;
+        shouldSnap = worldPos.length() < snapThreshold;
+    }
+
+    if (shouldSnap != m_isSnappingOrigin) {
+        m_isSnappingOrigin = shouldSnap;
+        update();
+    }
+
     int dx = event->pos().x() - lastPos.x();
     int dy = event->pos().y() - lastPos.y();
 
diff --git a/src/ViewportWidget.h b/src/ViewportWidget.h
index 373cb02..9cdd08f 100644
--- a/src/ViewportWidget.h
+++ b/src/ViewportWidget.h
@@ -90,6 +90,7 @@ private:
     bool m_isDefiningLine = false;
     gp_Pnt m_firstLinePoint;
     QPoint m_currentMousePos;
+    bool m_isSnappingOrigin = false;
 
     QMap<int, QSvgRenderer*> m_toolIcons;
     QSvgRenderer* m_cursorRenderer = nullptr;