// breakLimb
public void breakLimb()
{
// Should never break a broken limb
Debug.Assert(doBreak && !isBroken);
doBreak = false;
isBroken = true;
// Destroy internode constraint
internodeConstraint = null;
// Build a list of metamers on this branch
List<Metamer> metamersOnBranch = new List<Metamer>();
findMetamersOnBranch(metamersOnBranch);
// Break acropetal constraints
breakUpwards(metamersOnBranch);
}
public Metamer(Tree tree, Metamer previousMetamer, BudType activeBud, BudState terminalBudState, BudState lateralBudState, float axis, bool placeBudOnLeft)
{
this.tree = tree;
this.activeBud = activeBud;
this.previousMetamer = previousMetamer;
this.terminalBudState = terminalBudState;
this.lateralBudState = lateralBudState;
this.axis = axis;
this.placeBudOnLeft = placeBudOnLeft;
aabb = new AABB();
isRoot = previousMetamer == null;
constraintPoints = new List<Metamer>();
previousConstraintPoints = new List<Metamer>();
associatedMarkers = new List<MetamerMarker>();
fixturesToTest = new Fixture[MAX_FIXTURES_TO_TEST];
localGridHalfWidth = (int)Math.Floor(tree.perceptionRadius / TreeSystem.PLANT_CELL_SIZE) + 2;
localGridHalfHeight = (int)Math.Floor(tree.perceptionRadius / TreeSystem.PLANT_CELL_SIZE) + 2;
currentAngle = axis;
currentTextureAngle = axis;
collisionVertices = new Vector2[FarseerPhysics.Settings.MaxPolygonVertices];
collisionNormals = new Vector2[FarseerPhysics.Settings.MaxPolygonVertices];
constraints = new List<MetamerConstraint>();
relatedConstraints = new List<MetamerConstraint>();
_vertices = new VertexPositionColorTexture[2];
// Mass
mass = 1f;
inverseMass = 1f / mass;
// Calculate position
position = (isRoot ? tree.position : previousMetamer.position + new Vector2((float)Math.Cos(axis), (float)Math.Sin(axis)) * tree.internodeLength);
oldPosition = position;
// Trunk constraints
if (!isRoot)
{
if (isApex() && tree.iterations < 2)
{
// Create anchor constraints
Vector2 relative = position - tree.rootPosition;
Vector2 anchorA = tree.rootPosition + tree.anchorNormal * 3f;
float distance = (anchorA - position).Length();
constraints.Add(new TrunkMetamerConstraint(this, anchorA, distance));
Vector2 anchorB = tree.rootPosition + tree.anchorNormal * -3f;
distance = (anchorB - position).Length();
constraints.Add(new TrunkMetamerConstraint(this, anchorB, distance));
}
// Create metamer-metamer links
if (!previousMetamer.isBroken)
internodeConstraint = new DistanceMetamerConstraint(this, previousMetamer, tree.internodeLength * 0.8f, 0.5f);
}
// Put this metamer in a cell in the metamer grid
ci = tree.treeSystem.getPlantGridX(position.X);
cj = tree.treeSystem.getPlantGridY(position.Y);
if (!tree.treeSystem.metamerGrid.ContainsKey(tree.levelUid))
{
tree.treeSystem.metamerGrid.Add(tree.levelUid, new Dictionary<int, Dictionary<int, List<Metamer>>>());
}
if (!tree.treeSystem.metamerGrid[tree.levelUid].ContainsKey(ci))
{
tree.treeSystem.metamerGrid[tree.levelUid][ci] = new Dictionary<int, List<Metamer>>();
}
if (!tree.treeSystem.metamerGrid[tree.levelUid][ci].ContainsKey(cj))
{
tree.treeSystem.metamerGrid[tree.levelUid][ci][cj] = new List<Metamer>();
}
tree.treeSystem.metamerGrid[tree.levelUid][ci][cj].Add(this);
// Destroy markers in the occupied zone
destroyMarkersInOccupiedZone();
// Expand level boundary
tree.treeSystem.levelSystem.expandFallbackBoundary(tree.levelUid, position);
// Determine z-index
_z = tree.layerDepth + StasisMathHelper.floatBetween(-0.02f, 0.01f, tree.random);
}