Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.equation / src / org / simantics / equation / ext / SecondOrderScalarPolynomialSolver.java

diff --git a/bundles/org.simantics.equation/src/org/simantics/equation/ext/SecondOrderScalarPolynomialSolver.java b/bundles/org.simantics.equation/src/org/simantics/equation/ext/SecondOrderScalarPolynomialSolver.java
new file mode 100644 (file)
index 0000000..cff38df
--- /dev/null
+++ b/bundles/org.simantics.equation/src/org/simantics/equation/ext/SecondOrderScalarPolynomialSolver.java
@@ -0,0 +1,38 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.equation.ext;\r
+\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.equation.EquationResources;\r
+import org.simantics.equation.solver.ExpressionSolver;\r
+import org.simantics.equation.solver.Solver;\r
+import org.simantics.equation.stubs.EquationResource;\r
+\r
+public class SecondOrderScalarPolynomialSolver implements ExpressionSolver {\r
+\r
+    public void evaluate(Solver solver, ReadGraph g, Resource t) throws DatabaseException {\r
+        EquationResource eq = EquationResources.equationResource;\r
+\r
+        double a = g.getRelatedValue(t, eq.HasA);\r
+        double b = g.getRelatedValue(t, eq.HasB);\r
+        double c = g.getRelatedValue(t, eq.HasC);\r
+\r
+        double x = solver.getDoubleValue(g, g.getSingleObject(t, eq.HasSource));\r
+\r
+        double r = a * x * x + b * x + c;\r
+\r
+        solver.setValue(g.getSingleObject(t, eq.HasTarget), new double[] { r });\r
+    }\r
+\r
+}\r