Reverse matrix order.

Normand Briere

2018-07-01 89c1ad67bc65d24ceadfa9e95f8c5515283f1e97

 Torus.java
..
..
@@ -61,16 +61,25 @@
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         if (v == 1)
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             v = 0;
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-        double uAng = LA.toRadians((1-u) * 360);
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-        double vAng = LA.toRadians(v * 360);
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-        double x = (double)Math.cos(uAng) * (major + (double)Math.cos(vAng) * minor);
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-        double y = (double)Math.sin(vAng) * minor;
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+        double uAng = u * 2 * Math.PI;
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+        double vAng = v * 2 * Math.PI;
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+        double cosua = Math.cos(uAng);
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+        double sinua = Math.sin(uAng);
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+        double cosva = Math.cos(vAng);
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+        double sinva = Math.sin(vAng);
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+        
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+        double radius = (major + cosva * minor);
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+        double x = cosua * radius;
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+        double y = sinva * minor;
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         if (Math.abs(y) < 1E-10)
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             y = 0; // hashtable issue
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-        double z = (double)Math.sin(uAng) * (major + (double)Math.cos(vAng) * minor);
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+        
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+        double z = sinua * radius;
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         cVector tPos = LA.newVector(x, y, z);
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-        double xx = (double)(Math.cos(uAng) * Math.cos(vAng)) * minor;
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-        double zz = (double)(Math.sin(uAng) * Math.cos(vAng)) * minor;
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+        
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+        double xx = cosua * cosva * minor;
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+        double zz = sinua * cosva * minor;
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+        
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         cVector tNorm = LA.newVector(xx, y, zz);
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         Vertex temp = new Vertex(tPos);
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         //temp.pos = tPos; // useless new