public CreatureDefinition GetMutatedCreature()
        {
            //CreateNewNode(Nodes);
            // 1/4 chance of making a new node
            var newCreature = this;



            // Modify the nodes already on the creature
            var change = 0.01f;

            newCreature = newCreature.With(
                nodes: Nodes.Select(node =>
            {
                if (Random.NextFloat(0.0f, 1.0f) < 0.2f)
                {
                    return(node);
                }
                for (var i = 0; i < 10; i++)
                {
                    var newNode = new NodeDefintion(
                        posX: (node.PosX + Random.NextFloat(-width / 10, width / 10)).Inbetween(-width, width),
                        posY: (node.PosY + Random.NextFloat(-height / 10, height / 10)).Inbetween(-height, height),
                        radius: (node.Radius + Random.NextFloat(-change, change)).Inbetween(radiusMin, radiusMax),
                        friction: (node.Friction + Random.NextFloat(-change, change)).Inbetween(frictionMin, frictionMax),
                        density: (node.Density + Random.NextFloat(-change, change)).Inbetween(densityMin, densityMax));
                    // Exclude original node from collision check list so that the new node can be slightly displaced
                    if (NodesCollidingAllCheck(newNode, Nodes.Remove(node)))
                    {
                        return(newNode);
                    }
                }
                // if it can't find a way to make a node without pos and radius.
                return(new NodeDefintion(
                           posX: node.PosX,
                           posY: node.PosY,
                           radius: node.Radius,
                           friction: node.Friction + Random.NextFloat(-.1f, .1f).Inbetween(frictionMin, frictionMax),
                           density: node.Density + Random.NextFloat(-.2f, .2f).Inbetween(densityMin, densityMax)));
            }).ToImmutableList());


            var nodeChance = 100.0f;
            var nodeLoop   = 100;

            // Delete nodes randomly
            {
                for (var i = 0; i < nodeLoop; i++)
                {
                    var nodeCount = newCreature.Nodes.Count;
                    if (nodeCount <= 1)
                    {
                        break;
                    }
                    if (Random.NextFloat(0.0f, nodeChance / 2) < 1f)
                    {
                        newCreature = newCreature.RemoveNode(Random.Next(nodeCount));
                    }
                }
            }

            // Add nodes randomly
            for (var i = 0; i < nodeLoop; i++)
            {
                if (Random.NextFloat(0.0f, nodeChance) < 1.0f)
                {
                    var newNode = CreateNewNode(Nodes);
                    if (newNode != null)
                    {
                        newCreature = newCreature.With(
                            nodes: Nodes.Add(newNode));
                        // add joint to new node
                        var nodeCount = newCreature.Nodes.Count;
                        if (nodeCount > 1)
                        {
                            for (var e = 0; e < 2; e++)
                            {
                                var node1Index = nodeCount - 1;
                                var node2Index = Random.Next(0, nodeCount - 1);
                                var newJoint   = new JointDefinition(
                                    node1Index: node1Index,
                                    node2Index: node2Index,
                                    length: 0,
                                    lengthDelta: Random.NextFloat(distanceAddMin, distanceAddMax),
                                    motorInterval: Random.NextFloat(distanceAddMin, distanceAddMax));
                                newCreature = newCreature.With(
                                    joints: newCreature.Joints.Add(newJoint));
                            }
                        }
                    }
                }
            }


            var jointChance = 100.0f;
            var jointLoop   = 100;

            // delete joints randomly
            {
                for (var i = 0; i < jointLoop; i++)
                {
                    var jointCount = newCreature.Joints.Count;
                    if (jointCount > 1 && Random.NextFloat(0.0f, jointChance) < 1f)
                    {
                        newCreature = newCreature.With(
                            joints: newCreature.Joints.RemoveAt(Random.Next(0, jointCount)));
                    }
                }
            }

            // modify joints
            {
                newCreature = newCreature.With(
                    joints: newCreature.Joints.Select(joint =>
                {
                    return(joint.With(
                               lengthDelta: (joint.LengthDelta + Random.NextFloat(-.1f, .1f)).Inbetween(distanceAddMin, distanceAddMax),
                               motorInterval: (joint.MotorInterval + Random.NextFloat(-.1f, .1f)).Inbetween(distanceAddTimeMin, distanceAddTimeMax)
                               ));
                }).ToImmutableList());
            }

            // add joints randomly
            {
                var jointCount = newCreature.Joints.Count;
                for (var i = 0; i < jointLoop; i++)
                {
                    jointCount = newCreature.Joints.Count;
                    var nodeCount = newCreature.Nodes.Count;
                    if (jointCount < 30 && Random.NextFloat(0.0f, jointChance) < 1f)
                    {
                        var node1Index1 = Random.Next(0, nodeCount);
                        var node2Index1 = Random.Next(0, nodeCount);
                        if (node1Index1 != node2Index1 && !newCreature.Joints.Any(joint =>
                                                                                  (joint.Node1Index == node1Index1 && joint.Node2Index == node2Index1) ||
                                                                                  (joint.Node2Index == node1Index1 && joint.Node1Index == node2Index1)))
                        {
                            var newJoint = new JointDefinition(
                                node1Index: node1Index1,
                                node2Index: node2Index1,
                                length: 0,
                                lengthDelta: Random.NextFloat(distanceAddMin, distanceAddMax),
                                motorInterval: Random.NextFloat(distanceAddMin, distanceAddMax));
                            newCreature = newCreature.With(
                                joints: newCreature.Joints.Add(newJoint));
                        }
                    }
                }
            }


            // fixup joint lenths
            newCreature = newCreature.With(
                joints: newCreature.Joints.Select(joint =>
            {
                var node1 = newCreature.Nodes[joint.Node1Index];
                var node2 = newCreature.Nodes[joint.Node2Index];
                var distanceBetweenTwoNodes = (node1.Pos - node2.Pos).Length();

                return(joint.With(length: distanceBetweenTwoNodes));
            }).ToImmutableList());
            return(newCreature);
        }
Exemplo n.º 2
0
 public JointDrawable(Body body, Body body2, System.Windows.Media.Color color, JointDefinition definition) : base(body, color)
 {
     Definition = definition;
     Body2      = body2;
     CreateJoint();
 }