Diff: Map/figure.h

Revision:

46:be4eebf40568

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Map/figure.h	Mon Apr 25 12:42:32 2016 +0000
@@ -0,0 +1,41 @@
+#ifndef FIGURE_H
+#define FIGURE_H
+
+#include "point.h"
+
+class figure {
+public:
+    figure(float xc, float yc) {
+        xcentre = xc;
+        ycentre = yc;
+    }
+
+    float getX () { return xcentre; }
+    float getY () { return ycentre; }
+
+    bool CroisementSegment (point A1, point A2, point B1, point B2) {
+        if (ProdVect (A1, A2, B1, B2) != 0) { // On verifie que les droites ne sont pas parallèles
+            if (ProdVect (A1, A2, A1, B2)*ProdVect (A1, A2, A1, B1) <= 0
+                && ProdVect (B1, B2, B1, A1)*ProdVect (B1, B2, B1, A2) <= 0) {
+                return true;
+            }
+            else {
+                return false;
+            }
+        }
+        else {
+            return false;
+        }
+    }
+
+protected:
+    float xcentre, ycentre;
+
+    float ProdVect (float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4) {
+        return ((x2 - x1)*(y4 - y3) - (y2 - y1)*(x4 - x3));
+    }
+    float ProdVect (point A1, point A2, point B1, point B2) {
+        return ProdVect (A1.getX(), A1.getY (), A2.getX (), A2.getY (), B1.getX (), B1.getY (), B2.getX (), B2.getY ());
+    }
+};
+#endif
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