Добавлен ЛР-1 вариант 8

src/gm/LR_1_v8.java

@@ -0,0 +1,56 @@
+package gm;
+
+import com.annimon.graphics.Application;
+import com.annimon.graphics.GraphicsExt;
+
+/**
+ * Вариант 8
+ * @author aNNiMON
+ */
+public class LR_1_v8 extends Application {
+
+    public static void main(String[] args) {
+        new LR_1_v8();
+    }
+    
+    private static final double[][] ARROW_PTS = {
+        {0.0, 0.5, 0.4, 0.4, 0.5},
+        {0.0, 0.00, 0.2, -0.2, 0.00},
+    };
+    
+    private static final double N = 30;
+    
+    public LR_1_v8() {
+        super(900, 480);
+        setTitle("LR_1 v8");
+    }
+
+    @Override
+    protected void paint(GraphicsExt g) {
+        double x1 = 0, y1 = 2;
+        for (int i = 0; i < N; i++) {
+            double x2 = x1 + (i / 50d);
+            double y2 = y1 + Math.sin(x2) / 5d;
+            g.reset();
+            g.translate(x2, y2);
+            g.rotate(-Math.atan2(y2 - y1, x2 - x1));
+            drawArrow(g, i);
+            x1 = x2;
+            y1 = y2;
+        }
+    }
+    
+    private void drawArrow(GraphicsExt g, int num) {
+        final int length = ARROW_PTS[0].length;
+        double[][] points = new double[2][length];
+        double scale = num / 30d;
+        for (int i = 0; i < length; i++) {
+            points[0][i] = ARROW_PTS[0][i] * scale;
+            points[1][i] = ARROW_PTS[1][i] * scale;
+        }
+        g.move(points[0][0], points[1][0]);
+        for (int i = 1; i < length; i++) {
+            g.draw(points[0][i], points[1][i]);
+        }
+    }
+}