From b9d0a0a272037b819d0c854918a108ccd79b3ef4 Mon Sep 17 00:00:00 2001
From: thepra <agge92@live.it>
Date: Mon, 28 Aug 2017 13:21:41 +0200
Subject: [PATCH] fixing drawing lines

---
 renderarea.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/renderarea.cpp b/renderarea.cpp
index ba92eef..6627121 100644
--- a/renderarea.cpp
+++ b/renderarea.cpp
@@ -66,7 +66,11 @@ void RenderArea::paintEvent(QPaintEvent* event)
 
 	painter.drawRect(this->rect());
 
-	QPoint center{this->rect().center()};
+	QPointF prevPoint{Compute(0)};
+	QPoint center{this->rect().center()},prevPixel;
+	prevPixel.setX(prevPoint.x() * mScale + center.x());
+	prevPixel.setY(prevPoint.y() * mScale + center.y());
+
 	double step{ mIntervalLenght / mStepCount };
 
 	for(float t = 0; t < mIntervalLenght; t += step){
@@ -76,7 +80,9 @@ void RenderArea::paintEvent(QPaintEvent* event)
 		pixel.setX(point.x() * mScale + center.x());
 		pixel.setY(point.y() * mScale + center.y());
 
-		painter.drawPoint(pixel);
+		painter.drawLine(pixel, prevPixel);
+
+		prevPixel=pixel;
 	}
 }