Diff: LIB/Bezier.cpp

Revision:

1:8bab9152933e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LIB/Bezier.cpp	Thu Aug 11 12:18:13 2016 +0000
@@ -0,0 +1,45 @@
+#include "Bezier.h"
+
+Bezier::Bezier()
+{;}
+Bezier::~Bezier()
+{
+    ;
+    }
+void Bezier::add_point(float x,float y)
+{
+        xpos.push_back(x);
+        ypos.push_back(y);
+    }
+    
+void Bezier::get_pos(float t, float *xret, float *yret)
+{
+        int ii, ij, npoints;
+        float *x, *y;
+
+        npoints = xpos.size();
+        x = new float [npoints];
+        y = new float [npoints];
+        // load with current points
+        for (ii=0; ii<npoints; ii++)
+        {
+            x[ii] = xpos[ii];
+            y[ii] = ypos[ii];
+        }
+
+        // iterate over levels
+        for (ii=0; ii<npoints-1; ii++)
+        {
+            for (ij=0; ij<npoints-ii-1; ij++)
+            {
+                x[ij] = (1.0-t)*x[ij] + t*x[ij+1];
+                y[ij] = (1.0-t)*y[ij] + t*y[ij+1];
+            }
+        }
+
+        *xret = x[0];
+        *yret = y[0];
+
+        delete [] x;
+        delete [] y;
+    }
\ No newline at end of file