public static GameObject Create(
// Vector3 position,
IVertexProvider VertEdge,
Vector3 upDirection,
Vector3 bridgeDirection,
Material material)
{
var go = new GameObject("MakeBridgeGeometry.Create();");
var mf = go.AddComponent <MeshFilter>();
var mesh = mf.mesh;
List <Vector3> newVerts = new List <Vector3>();
List <int> newTris = new List <int>();
List <Vector2> newUVs = new List <Vector2>();
float bridgeDistance = bridgeDirection.magnitude;
// make a strip going down
Vector3 prevVert = Vector3.zero;
Vector2 downUV = new Vector2(0, 1);
Vector2 leftUV = new Vector2(0, 0);
Vector2 rightUV = new Vector2(1, 0);
// compute where we should go
Vector3 location = go.transform.position;
{
var centroid = Vector3.zero;
int vertCount = 0;
foreach (var v in VertEdge.GetVertices())
{
centroid += v;
vertCount++;
}
if (vertCount > 0)
{
centroid /= vertCount;
}
// stick this bridge geometry origin at the centroid of
// the edges plus half the bridge distance
location = centroid + bridgeDirection / 2;;
go.transform.position = location;
}
foreach (var v in VertEdge.GetVertices())
{
var v2 = v + bridgeDirection;
// raycast this part down to match the first collider we hit
var ray = new Ray(origin: v2, direction: -upDirection);
RaycastHit hit;
if (Physics.Raycast(ray: ray, hitInfo: out hit, maxDistance: 100))
{
v2 = hit.point;
}
int n = newVerts.Count;
float vDistance = (v - prevVert).magnitude;
float step = vDistance / bridgeDistance;
newVerts.Add(v);
newVerts.Add(v2);
newUVs.Add(leftUV);
newUVs.Add(rightUV);
leftUV += downUV * step;
rightUV += downUV * step;
if (n > 0)
{
newTris.Add(n - 2);
newTris.Add(n);
newTris.Add(n - 1);
newTris.Add(n);
newTris.Add(n + 1);
newTris.Add(n - 1);
}
prevVert = v;
}
// back out our local position from these points,
// since points are in local space
for (int i = 0; i < newVerts.Count; i++)
{
newVerts[i] -= location;
}
mesh.vertices = newVerts.ToArray();
mesh.triangles = newTris.ToArray();
mesh.uv = newUVs.ToArray();
mesh.RecalculateBounds();
mesh.RecalculateNormals();
mf.mesh = mesh;
var mr = go.AddComponent <MeshRenderer>();
mr.material = material;
return(go);
}
