예제 #1
0
        private static void DrawNode(Tree.Node node, Graphics g, int depth, float x, float y, float imageWidth)
        {
            const int   CHAR_WIDTH            = 16;
            const int   rectHeight            = 20;
            const float distanceYBetweenNodes = (float)rectHeight * 1.5f;

            int rectWidth = 40;

            if (depth > 12)
            {
                return;             //only draw to depth 12;
            }
            if (node is Tree.FuncNode)
            {
                Tree.FuncNode functionNode = node as Tree.FuncNode;
                rectWidth = functionNode.Function.Name.Length * CHAR_WIDTH;
                g.DrawRectangle(Pens.Blue, x - (rectWidth / 2), y - (rectHeight / 2), rectWidth, rectHeight);
                g.DrawString(functionNode.Function.Name, Font, Brushes.Blue, x - (rectWidth / 2), y - (rectHeight / 2));

                int   numberOfChildren = functionNode.Children.Length;
                float nodeSplitting    = (float)(imageWidth / 2) * (float)Math.Pow(0.5, depth) * (float)1.0;

                for (int i = 0; i < numberOfChildren; i++)
                {
                    float childX = (x - nodeSplitting) + (((float)Math.Pow(i, 0.8) * nodeSplitting * 2) / (numberOfChildren - 1));
                    g.DrawLine(LinePen, x, y + rectHeight / 2, childX, y + distanceYBetweenNodes - (rectHeight / 2));
                    DrawNode(functionNode.Children[i], g, depth + 1, childX, y + distanceYBetweenNodes, imageWidth);
                }
            }
            else if (node is Tree.ValueNode)
            {
                Tree.ValueNode valueNode = node as Tree.ValueNode;
                rectWidth = valueNode.Value.ToString().Length *CHAR_WIDTH;
                g.DrawRectangle(Pens.Red, x - (rectWidth / 2), y - (rectHeight / 2), rectWidth, rectHeight);
                g.DrawString(valueNode.Value.ToString(), Font, Brushes.Blue, x - (rectWidth / 2), y - (rectHeight / 2));
            }
            else if (node is Tree.VariableNode)
            {
                Tree.VariableNode variableNode = node as Tree.VariableNode;
                rectWidth = variableNode.Variable.Name.Length * CHAR_WIDTH;
                g.DrawRectangle(Pens.DarkGreen, x - (rectWidth / 2), y - (rectHeight / 2), rectWidth, rectHeight);
                g.DrawString(variableNode.Variable.Name.ToString(), Font, Brushes.DarkGreen, x - (rectWidth / 2), y - (rectHeight / 2));
            }
            else
            {
                throw new ApplicationException();
            }
        }
예제 #2
0
        public Program Crossover(Program prog2)
        {
            Program prog1Clone = this.CloneProgram();

            Tree.Node nodeToTake = null;

            // 90% of the time do function crossover. 10% of time, just choose any node
            if (s_Random.NextDouble() > 0.1 && prog2.m_TopNode.TreeSizeFunctionsOnly > 0)
            {
                int funcNumToMutate = s_Random.Next(prog2.m_TopNode.TreeSizeFunctionsOnly);
                int currentFuncNum  = 0;
                nodeToTake = prog2.m_TopNode.GetFunctionNumber(funcNumToMutate, ref currentFuncNum).CloneTree();
            }
            else
            {
                int nodeToTakeNum       = s_Random.Next(prog2.TreeSize);
                int currentNodeNumProg2 = 0;
                nodeToTake = prog2.m_TopNode.GetNodeNumber(nodeToTakeNum, ref currentNodeNumProg2).CloneTree();
            }

            int prog1NodeToReplace = s_Random.Next(0, prog1Clone.TreeSize);
            int currentNodeNum     = 0;

            if (prog1NodeToReplace == 0)
            {
                prog1Clone.m_TopNode = nodeToTake;
            }
            else
            {
                prog1Clone.m_TopNode.SetNode(prog1NodeToReplace, nodeToTake, ref currentNodeNum);
                if (!Node.m_ReplacementDone)
                {
                    throw new ApplicationException();
                }
            }

            return(prog1Clone);
        }