[gpad] restore previous if-check

Author: ferdymercury

graf2d/gpad/src/TPad.cxx

@@ -1016,56 +1016,56 @@ Int_t TPad::ClipPolygon(Int_t n, Double_t *x, Double_t *y, Int_t nn, Double_t *x
    if (nc > 0) {
       x1 = xc[nc - 1];
       y1 = yc[nc - 1];
-   }
-   nc2 = 0;
-   for (i = 0; i < nc; i++) {
-      x2 = xc[i]; y2 = yc[i];
-      if (x1 == x2) {
-         slope = 0;
-      } else {
-         slope = (y2-y1)/(x2-x1);
-      }
-      if (x1 <= xclipr) {
-         if (x2 > xclipr) {
-            xc2[nc2] = xclipr; yc2[nc2++] = slope*(xclipr-x1)+y1;
+      nc2 = 0;
+      for (i = 0; i < nc; i++) {
+         x2 = xc[i]; y2 = yc[i];
+         if (x1 == x2) {
+            slope = 0;
          } else {
-            xc2[nc2] = x2; yc2[nc2++] = y2;
+            slope = (y2-y1)/(x2-x1);
          }
-      } else {
-         if (x2 <= xclipr) {
-            xc2[nc2] = xclipr; yc2[nc2++] = slope*(xclipr-x1)+y1;
-            xc2[nc2] = x2; yc2[nc2++] = y2;
+         if (x1 <= xclipr) {
+            if (x2 > xclipr) {
+               xc2[nc2] = xclipr; yc2[nc2++] = slope*(xclipr-x1)+y1;
+            } else {
+               xc2[nc2] = x2; yc2[nc2++] = y2;
+            }
+         } else {
+            if (x2 <= xclipr) {
+               xc2[nc2] = xclipr; yc2[nc2++] = slope*(xclipr-x1)+y1;
+               xc2[nc2] = x2; yc2[nc2++] = y2;
+            }
          }
+         x1 = x2; y1 = y2;
       }
-      x1 = x2; y1 = y2;
-   }
 
-   // Clip against the bottom boundary
-   if (nc2 > 0) {
-      x1 = xc2[nc2 - 1];
-      y1 = yc2[nc2 - 1];
-   }
-   nc = 0;
-   for (i = 0; i < nc2; i++) {
-      x2 = xc2[i]; y2 = yc2[i];
-      if (y1 == y2) {
-         slope = 0;
-      } else {
-         slope = (x2-x1)/(y2-y1);
+      // Clip against the bottom boundary
+      if (nc2 > 0) {
+         x1 = xc2[nc2 - 1];
+         y1 = yc2[nc2 - 1];
       }
-      if (y1 >= yclipb) {
-         if (y2 < yclipb) {
-            xc[nc] = x1+(yclipb-y1)*slope; yc[nc++] = yclipb;
+      nc = 0;
+      for (i = 0; i < nc2; i++) {
+         x2 = xc2[i]; y2 = yc2[i];
+         if (y1 == y2) {
+            slope = 0;
          } else {
-            xc[nc] = x2; yc[nc++] = y2;
+            slope = (x2-x1)/(y2-y1);
          }
-      } else {
-         if (y2 >= yclipb) {
-            xc[nc] = x1+(yclipb-y1)*slope; yc[nc++] = yclipb;
-            xc[nc] = x2; yc[nc++] = y2;
+         if (y1 >= yclipb) {
+            if (y2 < yclipb) {
+               xc[nc] = x1+(yclipb-y1)*slope; yc[nc++] = yclipb;
+            } else {
+               xc[nc] = x2; yc[nc++] = y2;
+            }
+         } else {
+            if (y2 >= yclipb) {
+               xc[nc] = x1+(yclipb-y1)*slope; yc[nc++] = yclipb;
+               xc[nc] = x2; yc[nc++] = y2;
+            }
          }
+         x1 = x2; y1 = y2;
       }
-      x1 = x2; y1 = y2;
    }
 
    if (nc < 3)