/// <summary>
/// Returns true if the point is inside the initialized mesh
/// </summary>
/// <param name="point"></param>
/// <returns></returns>
public bool IsPointInsideMesh(float3 origin)
{
if (_planes == null)
{
return(false);
}
var hitCounter = 0;
var hit = false;
var end = new float3(origin.x, -10f, origin.z);
for (var i = 0; i < _planes.Length; i++)
{
float3 hitPoint = float3.zero;
hit = PlaneCollisionUtility.ComputLineHit(
_planes[i],
origin,
end,
out hitPoint);
if (hit)
{
hitCounter++;
DrawPlaneGizmos(_planes[i], hitPoint, _planes[i].Normal);
}
Gizmos.color = Color.magenta;
Gizmos.DrawLine(origin, end);
}
return(hitCounter % 2 == 0);
}
public void InitializeMesh(Mesh collisionMesh)
{
_planes = new PlaneStruct[collisionMesh.triangles.Length / 3];
for (var i = 0; i < collisionMesh.triangles.Length; i += 3)
{
var pointA = collisionMesh.vertices[collisionMesh.triangles[i + 0]];
var pointB = collisionMesh.vertices[collisionMesh.triangles[i + 1]];
var pointC = collisionMesh.vertices[collisionMesh.triangles[i + 2]];
var collisionPlane = PlaneCollisionUtility.ComputePlaneParameters(pointA, pointB, pointC);
_planes[i / 3] = collisionPlane;
}
}
