/// <summary>
/// Clone constructor
/// </summary>
/// <param name="lbMesh"></param>
public LBMesh(LBMesh lbMesh)
{
// A Mesh cannot be created outside the main Unity thread and must be called
// from that is typically inherited from MonoBehaviour
this.mesh = null;
this.title = lbMesh.title;
this.verts = new List <Vector3>(lbMesh.verts);
this.normals = new List <Vector3>(lbMesh.normals);
this.triangles = new List <int>(lbMesh.triangles);
if (lbMesh.uvs != null)
{
this.uvs = new List <Vector2>(lbMesh.uvs);
}
else
{
uvs = new List <Vector2>();
}
if (lbMesh.uv2s != null)
{
this.uv2s = new List <Vector2>(lbMesh.uv2s);
}
else
{
uv2s = new List <Vector2>();
}
if (lbMesh.uv3s != null)
{
this.uv3s = new List <Vector2>(lbMesh.uv3s);
}
else
{
uv3s = new List <Vector2>();
}
if (lbMesh.uv4s != null)
{
this.uv4s = new List <Vector2>(lbMesh.uv4s);
}
else
{
uv4s = new List <Vector2>();
}
if (lbMesh.tangents != null)
{
this.tangents = new List <Vector4>(lbMesh.tangents);
}
else
{
tangents = new List <Vector4>();
}
minExtent = lbMesh.minExtent;
maxExtent = lbMesh.maxExtent;
}
/// <summary>
/// Delete the Unity Mesh class instance and release memory. Clears all LBMesh data but doesn't delete the class instance.
/// NOTE: Memory will be released by LB back to the available heap within Unity. However, whether or not Unity
/// releases that memory back to the OS or not is beyond the control of LB.
/// </summary>
/// <param name="lbMesh"></param>
public static void DeleteMesh(LBMesh lbMesh)
{
if (lbMesh != null)
{
if (lbMesh.mesh != null)
{
lbMesh.mesh.Clear(false); lbMesh.mesh = null;
}
if (lbMesh.normals != null)
{
lbMesh.normals.Clear(); lbMesh.normals.TrimExcess(); lbMesh.normals = null;
}
if (lbMesh.tangents != null)
{
lbMesh.tangents.Clear(); lbMesh.tangents.TrimExcess(); lbMesh.tangents = null;
}
if (lbMesh.uvs != null)
{
lbMesh.uvs.Clear(); lbMesh.uvs.TrimExcess(); lbMesh.uvs = null;
}
if (lbMesh.uv2s != null)
{
lbMesh.uv2s.Clear(); lbMesh.uv2s.TrimExcess(); lbMesh.uv2s = null;
}
if (lbMesh.uv3s != null)
{
lbMesh.uv3s.Clear(); lbMesh.uv3s.TrimExcess(); lbMesh.uv3s = null;
}
if (lbMesh.uv4s != null)
{
lbMesh.uv4s.Clear(); lbMesh.uv4s.TrimExcess(); lbMesh.uv4s = null;
}
if (lbMesh.triangles != null)
{
lbMesh.triangles.Clear(); lbMesh.triangles.TrimExcess(); lbMesh.triangles = null;
}
if (lbMesh.verts != null)
{
lbMesh.verts.Clear(); lbMesh.verts.TrimExcess(); lbMesh.verts = null;
}
System.GC.Collect();
}
}
/// <summary>
/// Create an LBMesh object to hold the water mesh for a Topography Image Modifier Layer.
/// </summary>
/// <param name="landscape"></param>
/// <param name="lbLayer"></param>
/// <param name="layerIdx"></param>
/// <param name="meshTitle"></param>
/// <param name="showErrors"></param>
/// <returns></returns>
public static bool CreateMeshForWaterFromLayer(LBLandscape landscape, LBLayer lbLayer, int layerIdx, string meshTitle, bool showErrors)
{
bool isSuccessful = false;
string methodName = "LBMeshOperations.CreateMeshForWaterFromLayer";
if (landscape == null)
{
if (showErrors)
{
Debug.LogWarning("ERROR: " + methodName + " landscape is null. Please Report");
}
}
else if (lbLayer == null)
{
if (showErrors)
{
Debug.LogWarning("ERROR: " + methodName + " lbLayer is null. Please Report");
}
}
else if (lbLayer.type != LBLayer.LayerType.ImageModifier)
{
if (showErrors)
{
Debug.LogWarning("ERROR: " + methodName + " LayerType must be ImageModifier. Please Report");
}
}
{
// TODO get the minium area below zero for the RAW modifier file to use for meshWidth/Length
// Get the absolute width and length
Vector2 meshSize = Vector2.zero;
meshSize.x = lbLayer.areaRect.width < 0 ? -lbLayer.areaRect.width : lbLayer.areaRect.width;
meshSize.y = lbLayer.areaRect.height < 0 ? -lbLayer.areaRect.height : lbLayer.areaRect.height;
// Get the bottom-left point of mesh with landscape (it might be outside the landscape)
Vector2 meshBottomLeft = Vector2.zero;
meshBottomLeft.x = lbLayer.areaRect.x - (meshSize.x / 2f);
meshBottomLeft.y = lbLayer.areaRect.y - (meshSize.y / 2f);
if (meshBottomLeft.x < 0)
{
meshBottomLeft.x += meshSize.x;
}
else if (meshBottomLeft.x == meshSize.x)
{
meshBottomLeft.x = 0f;
}
if (meshBottomLeft.y < 0)
{
meshBottomLeft.y += meshSize.y;
}
else if (meshBottomLeft.y == meshSize.y)
{
meshBottomLeft.y = 0f;
}
//Debug.Log("INFO: " + methodName + " areaRect xy: " + lbLayer.areaRect.x + "," + lbLayer.areaRect.y + " b-l:" + meshBottomLeft);
// If there is an existing LBMesh instance, remove all the mesh data
if (lbLayer.modifierWaterLBMesh != null)
{
LBMesh.DeleteMesh(lbLayer.modifierWaterLBMesh);
}
else
{
lbLayer.modifierWaterLBMesh = new LBMesh();
}
if (lbLayer.modifierWaterLBMesh == null)
{
if (showErrors)
{
Debug.LogWarning("ERROR: " + methodName + " Could not create LBMesh for the water in Layer " + (layerIdx + 1) + ". Please Report");
}
}
else if (meshSize.x < 0.1f || meshSize.y < 0.1f)
{
{ if (showErrors)
{
Debug.LogWarning("ERROR: " + methodName + " LayerType " + (layerIdx + 1) + " has an invalid water mesh size " + meshSize.x + "," + meshSize.y);
}
}
}
{
lbLayer.modifierWaterLBMesh.title = meshTitle;
// Initialise mesh lists
List <Vector3> verts = new List <Vector3>();
List <Vector2> uvs = new List <Vector2>();
List <int> triangles = new List <int>();
List <Vector3> normals = new List <Vector3>();
List <Vector4> tangents = new List <Vector4>();
List <Vector4> colours = new List <Vector4>(); // Store as Vector4s rather than Color so they are serializable
// Declare outside loops for less garbage collection
// We are creating a flat plane, so can use Vector2.
Vector2 vertPositionN = Vector2.zero; // Normalised position within mesh
Vector2 vertLandscapePosN = Vector2.zero; // Normalised postion within the landscape
int vertCount = 0;
// Default colour of each vert (stored in LB as a Vector4)
Vector4 defaultVertColour = new Vector4(1f, 1f, 1f, 1f);
// The number of cells wide and long in the mesh
int meshWidth = 10;
int meshLength = 10;
for (int x = 0; x < meshWidth; x++)
{
for (int z = 0; z < meshLength; z++)
{
// Create the vert as a 0-1 position
// Normalise the RAW Pixel - converting it to a range of 0 to 1
vertPositionN.x = (float)x / (float)(meshWidth - 1);
vertPositionN.y = (float)z / (float)(meshLength - 1);
verts.Add(new Vector3(vertPositionN.x * meshSize.x, 0f, vertPositionN.y * meshSize.y));
normals.Add(Vector3.up);
if (lbLayer.modifierWaterIsMeshLandscapeUV)
{
// UVs normalised to the landscape
vertLandscapePosN.x = ((vertPositionN.x * meshSize.x) + meshBottomLeft.x) / landscape.size.x;
vertLandscapePosN.y = ((vertPositionN.y * meshSize.y) + meshBottomLeft.y) / landscape.size.y;
uvs.Add(new Vector2(vertLandscapePosN.x / lbLayer.modifierWaterMeshUVTileScale.x, vertLandscapePosN.y / lbLayer.modifierWaterMeshUVTileScale.y));
}
else
{
// Generic uvs (simply 0-1 coordinates of vert position)
uvs.Add(new Vector2(vertPositionN.x / lbLayer.modifierWaterMeshUVTileScale.x, vertPositionN.y / lbLayer.modifierWaterMeshUVTileScale.y));
}
// Create tangent
tangents.Add(new Vector4(1f, 0f, 0f, 1f));
// Add the two triangles for the quad
// Not required if on left or bottom edges of the mesh
if (x < meshWidth - 1 && z < meshLength - 1)
{
// Bottom (left) triangle
// Bottom left of quad
triangles.Add(vertCount);
// Bottom right of quad
triangles.Add(vertCount + 1);
// Top right of quad
triangles.Add(vertCount + meshWidth + 1);
// Top (right) triangle
// Top left of quad
triangles.Add(vertCount + meshWidth);
// Bottom left of quad
triangles.Add(vertCount);
// Top right of quad
triangles.Add(vertCount + meshWidth + 1);
}
// Set default vert colour
colours.Add(defaultVertColour);
// Increment the vert count
vertCount++;
}
}
lbLayer.modifierWaterLBMesh.verts = verts;
lbLayer.modifierWaterLBMesh.triangles = triangles;
lbLayer.modifierWaterLBMesh.normals = normals;
lbLayer.modifierWaterLBMesh.uvs = uvs;
lbLayer.modifierWaterLBMesh.tangents = tangents;
//Debug.Log("INFO " + methodName + " - created Mesh (verts " + verts.Count + " tris " + (triangles.Count / 3) + ")");
isSuccessful = true;
}
}
return(isSuccessful);
}
/// <summary>
/// Add a LBMesh mesh to a new gameobject in the scene as a child of the parentTransform
/// </summary>
/// <param name="lbMesh"></param>
/// <param name="position"></param>
/// <param name="gameobjectName"></param>
/// <param name="parentTransform"></param>
/// <param name="meshMaterial"></param>
/// <param name="isStatic"></param>
/// <param name="checkForExisting"></param>
/// <returns></returns>
public static Transform AddMeshToScene(LBMesh lbMesh, Vector3 position, string gameobjectName, Transform parentTransform, Material meshMaterial, bool isStatic, bool checkForExisting)
{
Transform meshTranform = null;
string methodName = "LBMeshOperations.AddMeshToScene";
// Basic validation
if (lbMesh == null)
{
Debug.LogWarning("ERROR: " + methodName + " - LBMesh cannot be null");
}
else if (string.IsNullOrEmpty(gameobjectName))
{
Debug.LogWarning("ERROR: " + methodName + " - no name specified");
}
else if (parentTransform == null)
{
Debug.LogWarning("ERROR: " + methodName + " - no parent transform is specified");
}
else
{
GameObject meshGameObject;
Transform tfrm = null;
// Check to see if the GameObject already exists
if (checkForExisting)
{
tfrm = parentTransform.Find(gameobjectName);
}
// If it doesn't exist or checkForExisting is false, create a new child object.
if (tfrm == null)
{
meshGameObject = new GameObject(gameobjectName);
if (meshGameObject == null)
{
Debug.LogWarning("ERROR: " + methodName + " - could not create GameObject " + gameobjectName);
}
else
{
meshGameObject.transform.SetParent(parentTransform);
}
}
else
{
meshGameObject = tfrm.gameObject;
}
if (meshGameObject != null)
{
meshGameObject.isStatic = isStatic;
meshGameObject.transform.position = position;
// If the Mesh Filter doesn't exist, add it
MeshFilter meshFilter = meshGameObject.GetComponent <MeshFilter>();
if (meshFilter == null)
{
meshFilter = meshGameObject.AddComponent <MeshFilter>();
}
// If the Mesh Renderer doesn't exist, add it
MeshRenderer meshRenderer = meshGameObject.GetComponent <MeshRenderer>();
if (meshRenderer == null)
{
meshRenderer = meshGameObject.AddComponent <MeshRenderer>();
}
if (meshFilter == null)
{
Debug.LogWarning("ERROR: " + methodName + " - Could not add MeshFilter to " + gameobjectName);
}
else if (meshRenderer == null)
{
Debug.LogWarning("ERROR: " + methodName + " - Could not add MeshRenderer to " + gameobjectName);
}
else
{
meshFilter.sharedMesh = lbMesh.mesh;
meshRenderer.sharedMaterial = meshMaterial;
//lbMesh.mesh.RecalculateBounds();
// We may already have the trfm (see above) but we want to only return if everything succeeds
meshTranform = meshGameObject.transform;
}
}
}
return(meshTranform);
}
