新增卡片工艺

src/main/java/lingtao/net/util/PriceUtils.java

@@ -3613,6 +3613,34 @@ public class PriceUtils {
         return price == 0 ? last_price : price;
     }
 
+    public double calcByTargetN(int startN, double highPrice, int endN, double lowPrice, int targetN) {
+        // 高价商品个数线性插值
+        double a = startN * (double) (endN - targetN) / (endN - startN);
+        double b = targetN - a;
+        double total = a * highPrice + b * lowPrice;
+        return total;
+    }
+
+    public double TableCountCenterPrice(int area, double[] price_list, int[] areas) {
+        double price = 0;
+        int startIndex = 0;
+        int endIndex = 0;
+        for (int i = 0; i < areas.length; i++) {
+            if (area > areas[i]) {
+                startIndex = endIndex;
+                endIndex = Math.min(i + 1, areas.length - 1);
+            }
+        }
+        if (startIndex == endIndex && startIndex == 0) {
+            price = price_list[endIndex];
+        } else if (startIndex == endIndex) {
+            price = (price_list[endIndex] / areas[endIndex]) * area;
+        } else {
+            price = ((areas[endIndex] - (double) area) / (areas[endIndex] - areas[startIndex])) * price_list[startIndex] + (((double) area - areas[startIndex]) / (areas[endIndex] - areas[startIndex])) * price_list[endIndex];
+        }
+        return price;
+    }
+
     public double TablePrice(double area, int[] price_list, double[] areas) {
         double price = 0;
         int startIndex = 0;