From dec766984245776bac2c4618a477c09e7a5c68aa Mon Sep 17 00:00:00 2001
From: maxluli <maxluligames@gmail.com>
Date: Wed, 1 Jun 2022 14:57:51 +0200
Subject: [PATCH] The bezier curve generator is now fully functionnal
 (LETSGOOOOOOOOO)

---
 Paint_2/BezierPencil.cs | 75 ++++++++++++++++++++++++++++++++++-------
 1 file changed, 62 insertions(+), 13 deletions(-)

diff --git a/Paint_2/BezierPencil.cs b/Paint_2/BezierPencil.cs
index 64cf6f4..ce7f59b 100644
--- a/Paint_2/BezierPencil.cs
+++ b/Paint_2/BezierPencil.cs
@@ -41,8 +41,9 @@ namespace Paint_2
             WidthsRedo = new List<int>();
             Name = name;
 
-            MessageBox.Show("Lerp test\nTest with start 20;20 and end 40;40 with 0.5f\n result : "+Lerp(new Point(20,20),new Point(40,40),0.5f));
-            MessageBox.Show("Lerp test\nTest with start 40;40 and end 20;20 with 0.5f\n result : " + Lerp(new Point(40, 40), new Point(20, 20), 0.5f));
+            //I KNOW I KNOW I LITTERALLY REINVENTED UNIT TEST BUT IF I CREATE SOME I WILL NEED TO DO THEM ALL STOP HARASSING ME
+            //MessageBox.Show("Lerp Test\nstart = 100;100\nend = 200;200\nt = 0.2\nExpected : 120;120 Actual : "+Lerp(new Point(100,100),new Point(200,200),0.2f));
+            //MessageBox.Show("Lerp Test\nstart = 200;200\nend = 100;100\nt = 0.2\nExpected : 180;180 Actual : " + Lerp(new Point(200, 200), new Point(100, 100), 0.2f));
         }
         public void Add(Point point)
         {
@@ -90,9 +91,41 @@ namespace Paint_2
         {
             //float xRatio = Math.Min((float)start.X,end.X) / Math.Max((float)start.X,end.X);
             //float yRatio = Math.Min((float)start.Y, end.Y) / Math.Max((float)start.Y, end.Y);
-            float xDiff = Math.Abs(start.X - end.X);
-            float yDiff = Math.Abs(start.Y -end.Y);
-            Point result = new Point(Math.Min(start.X,end.X) + (int)(t *xDiff),Math.Min(start.Y,end.Y) + (int)(t * yDiff));
+            int xDiff = end.X - start.X;
+            int yDiff = end.Y - start.Y;
+            int resultX = start.X + (int)(t * xDiff);
+            int resultY = start.Y + (int)(t * yDiff);
+            /*
+            if (xDiff > 0)
+            {
+                //Ex start 100 end 200
+                resultX = start.X + (int)(t * xDiff);
+                //resultX = (int)(t * xDiff);
+            }
+            else if(xDiff < 0){
+                //Ex start 200 end 100
+                resultX = start.X + (int)(t * xDiff);
+            }
+            else
+            {
+                resultX = 0;
+            }
+            if (yDiff > 0)
+            {
+                //Ex start 100 end 200
+                resultY = 
+            }
+            else if (yDiff < 0)
+            {
+                //Ex start 200 end 100
+                resultY = start.Y + (int)(t * yDiff);
+            }
+            else
+            {
+                resultY = 0;
+            }
+            */
+            Point result = new Point(resultX,resultY);
             return result;
         }
         public void Paint(Bitmap canvas)
@@ -129,24 +162,40 @@ namespace Paint_2
                         gr.DrawLine(new Pen(Colors[i - 3], Widths[i - 3]), p2, p3);
                         gr.DrawLine(new Pen(Colors[i - 2], Widths[i - 2]), p3, p4);
 
-                        float t = 0.5f;
+                        //float t = 0.5f;
+                        float precision = 0.01f;
 
-                        //Drawing 
-                        Point p1_2 = Lerp(p1, p2, t);
-                        Point p2_2 = Lerp(p2, p3, t);
-                        Point p3_2 = Lerp(p3, p4, t);
+                        for (float t = 0; t <= 1; t += precision)
+                        {
+                            //float t = 0.2f;
+                            //Drawing the first step of the curve
+                            Point p1_2 = Lerp(p1, p2, t);
+                            Point p2_2 = Lerp(p2, p3, t);
+                            Point p3_2 = Lerp(p3, p4, t);
 
-                        gr.FillEllipse(new SolidBrush(Color.BlueViolet),new Rectangle(p1_2.X,p1_2.Y,10,10));
+                            //gr.DrawLine(new Pen(GetRandomColor(), Widths[0]), p1_2, p2_2);
+                            //gr.DrawLine(new Pen(GetRandomColor(), Widths[0]), p2_2, p3_2);
 
-                        gr.DrawLine(new Pen(Color.Pink,10),p1_2,p2_2);
-                        gr.DrawLine(new Pen(Color.Red, 10), p2_2,p3_2);
+                            //Drawing the second step of the curve
+                            Point p1_3 = Lerp(p1_2, p2_2, t);
+                            Point p2_3 = Lerp(p2_2, p3_2, t);
 
+                            //gr.DrawLine(new Pen(GetRandomColor(), Widths[0]), p1_3, p2_3);
 
+                            //Drawing the Bezier Point
+                            Point p1_4 = Lerp(p1_3, p2_3, t);
 
+                            gr.FillEllipse(new SolidBrush(GetRandomColor()), new Rectangle(p1_4.X, p1_4.Y, Widths[0], Widths[0]));
+                        }
                     }
                 }
             }
         }
+        private Color GetRandomColor()
+        {
+            Random rnd = new Random();
+            return Color.FromArgb(rnd.Next(0,256), rnd.Next(0, 256), rnd.Next(0, 256));
+        }
         public void Start(Color color, int width)
         {
             Color = color;