/// <summary>
/// Chaining method for adding an obstacle to this Section.
/// It initializes bounding boxes and stores in Collidable Obstacles.
/// </summary>
/// <param name="obstacleEntity">The entity containing the obstacle</param>
/// <param name="useSubBoundingBoxes">true to use the bounding boxes of the sub-meshes</param>
/// <returns></returns>
public Section AddObstacleEntity(Entity obstacleEntity, bool useSubBoundingBoxes)
{
// Attach it in ModelEntity
RootEntity.AddChild(obstacleEntity);
// Get and add bb to CollidableObstacles
var modelComponent = obstacleEntity.Get<ModelComponent>();
var collidableObstacle = new Obstacle { Entity = obstacleEntity };
if (useSubBoundingBoxes)
{
// Use bounding boxes from parts of the obstacle.
foreach (var mesh in modelComponent.Model.Meshes)
{
var boundingBox = mesh.BoundingBox;
var nodeIndex = mesh.NodeIndex;
while (nodeIndex >= 0)
{
var node = modelComponent.Model.Skeleton.Nodes[nodeIndex];
var transform = node.Transform;
var matrix = Matrix.Transformation(Vector3.Zero, Quaternion.Identity, transform.Scale, Vector3.Zero, transform.Rotation, transform.Position);
Vector3.TransformNormal(ref boundingBox.Minimum, ref matrix, out boundingBox.Minimum);
Vector3.TransformNormal(ref boundingBox.Maximum, ref matrix, out boundingBox.Maximum);
nodeIndex = node.ParentIndex;
}
collidableObstacle.BoundingBoxes.Add(boundingBox);
}
}
else
{
// Use bounding box of the whole model
collidableObstacle.BoundingBoxes.Add(modelComponent.Model.BoundingBox);
}
CollidableObstacles.Add(collidableObstacle);
return this;
}
/// <summary>
/// Chaining method for adding an obstacle to this Section.
/// It initializes bounding boxes and stores in Collidable Obstacles.
/// </summary>
/// <param name="obstacleEntity">The entity containing the obstacle</param>
/// <param name="useSubBoundingBoxes">true to use the bounding boxes of the sub-meshes</param>
/// <returns></returns>
public Section AddObstacleEntity(Entity obstacleEntity, bool useSubBoundingBoxes)
{
// Attach it in ModelEntity
RootEntity.AddChild(obstacleEntity);
// Get and add bb to CollidableObstacles
var modelComponent = obstacleEntity.Get<ModelComponent>();
var collidableObstacle = new Obstacle { Entity = obstacleEntity };
if (useSubBoundingBoxes)
{
// Use bounding boxes from parts of the obstacle.
foreach (var mesh in modelComponent.Model.Meshes)
collidableObstacle.BoundingBoxes.Add(mesh.BoundingBox);
}
else
{
// Use bounding box of the whole model
collidableObstacle.BoundingBoxes.Add(modelComponent.Model.BoundingBox);
}
CollidableObstacles.Add(collidableObstacle);
return this;
}
private static bool DetectCollision(ref BoundingBox agentBB,
Obstacle obst)
{
var objTrans = obst.Entity.Transform;
objTrans.UpdateWorldMatrix();
var objWorldPos = objTrans.WorldMatrix.TranslationVector;
foreach (var boundingBox in obst.BoundingBoxes)
{
var minVec = objWorldPos + boundingBox.Minimum;
var maxVec = objWorldPos + boundingBox.Maximum;
var testBB = new BoundingBox(minVec, maxVec);
if (CollisionHelper.BoxContainsBox(ref testBB, ref agentBB) != ContainmentType.Disjoint)
return true;
}
return false;
}
