Replace/restore buttons.

Normand Briere

2019-07-17 a5580a47d246c1272b10adba68070f6e13da5e41

 Grid.java
..
..
@@ -64,7 +64,7 @@
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     Vertex biparamFunction(double u, double v)
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     {
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-        Vertex temp = new Vertex((2*v-1)*radius*8, 0 /*-radius,*/, (2*u-1)*radius*8);
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+        Vertex temp = new Vertex((2*v-1)*radius*4, 0 /*-radius,*/, (2*u-1)*radius*4);
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         temp.norm = LA.newVector(0,1,0);
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         return temp;
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     }