diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/delegate/SimulationPageDelegate.kt b/app/src/main/java/io/legado/app/ui/book/read/page/delegate/SimulationPageDelegate.kt
index f59b0f646..c5e7d40a4 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/delegate/SimulationPageDelegate.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/delegate/SimulationPageDelegate.kt
@@ -468,21 +468,23 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
 
         mMiddleX = (mTouchX + mCornerX) / 2
         mMiddleY = (mTouchY + mCornerY) / 2
-
         mBezierControl1.x =
             mMiddleX - (mCornerY - mMiddleY) * (mCornerY - mMiddleY) / (mCornerX - mMiddleX)
         mBezierControl1.y = mCornerY.toFloat()
-
         mBezierControl2.x = mCornerX.toFloat()
-        mBezierControl2.y = if ((mCornerY - mMiddleY).toInt() == 0) {
-            mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / 0.1f
+
+        val f4 = mCornerY - mMiddleY
+        if (f4 == 0f) {
+            mBezierControl2.y = mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / 0.1f
+
         } else {
-            mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / (mCornerY - mMiddleY)
+            mBezierControl2.y =
+                mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / (mCornerY - mMiddleY)
         }
-
         mBezierStart1.x = mBezierControl1.x - (mCornerX - mBezierControl1.x) / 2
         mBezierStart1.y = mCornerY.toFloat()
-        //固定左边上下两个点
+
+        // 固定左边上下两个点
         if (mTouchX > 0 && mTouchX < viewWidth) {
             if (mBezierStart1.x < 0 || mBezierStart1.x > viewWidth) {
                 if (mBezierStart1.x < 0)
@@ -491,6 +493,7 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
                 val f1 = abs(mCornerX - mTouchX)
                 val f2 = viewWidth * f1 / mBezierStart1.x
                 mTouchX = abs(mCornerX - f2)
+
                 val f3 = abs(mCornerX - mTouchX) * abs(mCornerY - mTouchY) / f1
                 mTouchY = abs(mCornerY - f3)
 
@@ -502,10 +505,14 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
                 mBezierControl1.y = mCornerY.toFloat()
 
                 mBezierControl2.x = mCornerX.toFloat()
-                mBezierControl2.y = if ((mCornerY - mMiddleY).toInt() == 0) {
-                    mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / 0.1f
+
+                val f5 = mCornerY - mMiddleY
+                if (f5 == 0f) {
+                    mBezierControl2.y =
+                        mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / 0.1f
                 } else {
-                    mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / (mCornerY - mMiddleY)
+                    mBezierControl2.y =
+                        mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / (mCornerY - mMiddleY)
                 }
 
                 mBezierStart1.x = mBezierControl1.x - (mCornerX - mBezierControl1.x) / 2
@@ -514,12 +521,19 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
         mBezierStart2.x = mCornerX.toFloat()
         mBezierStart2.y = mBezierControl2.y - (mCornerY - mBezierControl2.y) / 2
 
-        mTouchToCornerDis = hypot(mTouchX - mCornerX, mTouchY - mCornerY)
+        mTouchToCornerDis = hypot(
+            (mTouchX - mCornerX).toDouble(),
+            (mTouchY - mCornerY).toDouble()
+        ).toFloat()
 
-        mBezierEnd1 =
-            getCross(PointF(mTouchX, mTouchY), mBezierControl1, mBezierStart1, mBezierStart2)
-        mBezierEnd2 =
-            getCross(PointF(mTouchX, mTouchY), mBezierControl2, mBezierStart1, mBezierStart2)
+        mBezierEnd1 = getCross(
+            PointF(mTouchX, mTouchY), mBezierControl1, mBezierStart1,
+            mBezierStart2
+        )
+        mBezierEnd2 = getCross(
+            PointF(mTouchX, mTouchY), mBezierControl2, mBezierStart1,
+            mBezierStart2
+        )
 
         mBezierVertex1.x = (mBezierStart1.x + 2 * mBezierControl1.x + mBezierEnd1.x) / 4
         mBezierVertex1.y = (2 * mBezierControl1.y + mBezierStart1.y + mBezierEnd1.y) / 4