public void ForceXFixedPosions()
{
var collide = new ForceCollide <Node>();
var nodes = new List <Node>
{
new Node {
Fx = 0, Fy = 0
},
new Node(),
new Node(),
};
var f = new Simulation <Node>().AddForce("x", new ForceX <Node>(200));
f.Nodes = nodes;
f.Tick();
Assert.IsTrue(NodeEquals.Equals(nodes[0], new Node
{
X = 0,
Y = 0,
Index = 0,
Vx = 0,
Vy = 0,
Fx = 0,
Fy = 0
}));
}
private Node ParseEqualsNotEquals()
{
Node lhs = ParseLessThanGreaterThan();
while (true)
{
switch (Tokens.CurrentToken)
{
case TokenType.Equals:
{
Tokens.ReadNext();
Node rhs = ParseLessThanGreaterThan();
lhs = new NodeEquals(lhs, rhs);
continue;
}
case TokenType.NotEquals:
{
Tokens.ReadNext();
Node rhs = ParseLessThanGreaterThan();
lhs = new NodeNotEquals(lhs, rhs);
continue;
}
default:
return(lhs);
}
}
}
public void LinkNodes()
{
var mb = new ForceManyBody <Node>();
var nodes = new List <Node>
{
new Node(),
new Node(),
new Node(),
};
var links = new List <Link> {
new Link {
Source = 0, Target = 1
},
new Link {
Source = 0, Target = 2
},
new Link {
Source = 2, Target = 1
}
};
var f = new Simulation <Node>(nodes)
.AddForce("charge", new ForceLink <Node, Link>(links));
f.Tick(10);
Assert.IsTrue(NodeEquals.Equals(nodes[0], new Node
{
Index = 0,
X = 16.09041099433763,
Y = 3.5566118665783737,
Vy = -0.0054287493843713204,
Vx = -0.008594012984423784
}));
Assert.IsTrue(NodeEquals.Equals(nodes[1], new Node
{
Index = 1,
X = -13.530127801425026,
Y = 8.528827598527032,
Vy = -0.0029644135266946848,
Vx = 0.007059721513094188
}));
Assert.IsTrue(NodeEquals.Equals(nodes[2], new Node
{
Index = 2,
X = -3.13778081756669,
Y = -19.56325387055707,
Vy = 0.008393162911065991,
Vx = 0.00153429147132959
}));
}
public void InitializesWidthIndicesAndPhyllotaxisPositions()
{
var collide = new ForceCollide <Node>();
var nodes = new List <Node>
{
new Node(),
new Node(),
new Node(),
};
var f = new Simulation <Node>();
f.Nodes = nodes;
Assert.IsTrue(NodeEquals.Equals(nodes[0], new Node
{
X = 7.0710678118654755,
Y = 0,
Index = 0,
Vx = 0,
Vy = 0
}));
Assert.IsTrue(NodeEquals.Equals(nodes[1], new Node
{
X = -9.03088751750192,
Y = 8.27303273571596,
Index = 1,
Vx = 0,
Vy = 0
}));
Assert.IsTrue(NodeEquals.Equals(nodes[2], new Node
{
X = 1.3823220809823638,
Y = -15.750847141167634,
Index = 2,
Vx = 0,
Vy = 0
}));
}
public void RepositionNodesWithStrength()
{
var mb = new ForceManyBody <Node>();
var nodes = new List <Node>
{
new Node(),
new Node(),
new Node(),
};
var f = new Simulation <Node>(nodes)
.AddForce("charge", new ForceManyBody <Node>().SetStrength(110));
f.Tick(10);
Assert.IsTrue(NodeEquals.Equals(nodes[0], new Node
{
Index = 0,
X = -18.09293034190703,
Y = -61.85522398527266,
Vy = -3.253143684829417,
Vx = -1.7572575345196322
}));
Assert.IsTrue(NodeEquals.Equals(nodes[1], new Node
{
Index = 1,
X = 1.4163070367881587,
Y = -1.422811550994962,
Vy = -0.5737847675719954,
Vx = 1.7868953325697519
}));
Assert.IsTrue(NodeEquals.Equals(nodes[2], new Node
{
Index = 2,
X = 14.213419687223059,
Y = 53.52135594511722,
Vy = 3.9532863174478163,
Vx = 0.12091965478188131
}));
}
public void RepositionNodes()
{
var mb = new ForceManyBody <Node>();
var nodes = new List <Node>
{
new Node(),
new Node(),
new Node(),
};
var f = new Simulation <Node>(null)
.AddForce("charge", mb).Stop();
f.Nodes = nodes;
f.Tick(10);
Assert.IsTrue(NodeEquals.Equals(nodes[0], new Node
{
Index = 0,
X = 23.543801233055913,
Y = 7.000581643076774,
Vy = 0.517906401931719,
Vx = 1.2544752274469713
}));
Assert.IsTrue(NodeEquals.Equals(nodes[1], new Node
{
Index = 1,
X = -23.850904378439182,
Y = 21.28389725298747,
Vy = 0.914257118557985,
Vx = -1.1020909771461325
}));
Assert.IsTrue(NodeEquals.Equals(nodes[2], new Node
{
Index = 2,
X = -0.27039447927081395,
Y = -35.76229330151591,
Vy = -1.432163520489704,
Vx = -0.15238425030083882
}));
mb.SetStrength(-300);
f.Tick(10);
Assert.IsTrue(NodeEquals.Equals(nodes[0], new Node
{
Index = 0,
X = 75.51481478403578,
Y = 28.27281541254175,
Vy = 1.4774660259027388,
Vx = 3.6177951664030035
}));
Assert.IsTrue(NodeEquals.Equals(nodes[1], new Node
{
Index = 1,
X = -68.77261279544413,
Y = 57.176314237578026,
Vy = 2.438763218070549,
Vx = -3.1042619113625594
}));
Assert.IsTrue(NodeEquals.Equals(nodes[2], new Node
{
Index = 2,
X = -7.319699613245737,
Y = -92.92694405557147,
Vy = -3.916229243973288,
Vx = -0.5135332550404446
}));
}
