fixed bug in QuadraticSolver, cheap lighting working

git-svn-id: svn://anubis/fart/trunk@45 7f9b0f55-74a9-4bce-be96-3c2cd072584d

util/Solver.cc

@@ -34,7 +34,7 @@ Solver::Result QuadraticSolver::solve()
     {
         double sqrt_discriminant = sqrt(discriminant);
         double two_a = 2.0 * a;
-        if (sqrt_discriminant = 0.0)
+        if (sqrt_discriminant == 0.0)
         {
             res.numResults = 1;
             res.results[0] = (-b) / two_a;
@@ -61,6 +61,9 @@ CubicSolver::CubicSolver(double a, double b, double c, double d)
 
 Solver::Result CubicSolver::solve()
 {
+    Result res;
+    /* TODO: fill in */
+    return res;
 }
 
 
@@ -74,6 +77,9 @@ QuarticSolver::QuarticSolver(double a, double b, double c, double d, double e)
 
 Solver::Result QuarticSolver::solve()
 {
+    Result res;
+    /* TODO: fill in */
+    return res;
 }
 
 Solver::Result::Result()