works in separate functions

ComputerGraphicsLab2/Form1.cs

@@ -50,22 +50,39 @@ namespace ComputerGraphicsLab2
             // Очистка экрана
             GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
             
-            // Рисование треугольника
-            GL.Begin(PrimitiveType.Triangles);
-            
-            GL.Color3(1.0f, 0.0f, 0.0f);    // красная вершина
-            GL.Vertex2(-1.0f, -1.0f);
-            
-            GL.Color3(0.0f, 1.0f, 0.0f);    // зеленая вершина
-            GL.Vertex2(1.0f, -1.0f);
-            
-            GL.Color3(0.0f, 0.0f, 1.0f);    // синяя вершина
-            GL.Vertex2(0.0f, 1.0f);
-            
-            GL.End();
+            drawTriangle();
             
             // Отображение результата
             glControl1.SwapBuffers();
         }
+
+        private void drawTriangle()
+        {
+            var z = 4.0f;
+            var pointsCoint = 3;
+            var colors = new Vector3[pointsCoint];
+            var points = new Vector3[pointsCoint];
+
+            colors[0] = new Vector3(1.0f, 0.0f, 0.0f);
+            colors[1] = new Vector3(0.0f, 1.0f, 0.0f);
+            colors[2] = new Vector3(0.0f, 0.0f, 1.0f);
+            
+            points[0] = new Vector3(-1.0f, -1.0f, z);
+            points[1] = new Vector3(1.0f, -1.0f, z);
+            points[2] = new Vector3(0.0f, 1.0f, z);
+            
+            drawPolygon(points, colors, pointsCoint, BeginMode.Polygon);
+        }
+
+        private void drawPolygon(Vector3[] points, Vector3[] colors, int n, BeginMode mode)
+        {
+            GL.Begin(mode);
+            for (int i = 0; i < n; i++)
+            {
+                GL.Color3(colors[i]);
+                GL.Vertex2(points[i].X, points[i].Y);
+            }
+            GL.End();
+        }
     }
 }