public static void ProcessModelGroup(ModelGroup group, ref Vector2Int vertCount, ref Vector2Int triCount, ref Vector2Int meshCount, ref Vector2Int boxColliderCount)
{
bool collapseMesh = true;
bool collapseCols = group.importSettings.colliders;
// Keep track of how many of the removable meshes are left for each part.
var partMeshCount = new Dictionary <Part, int>();
// Keep track of how many of the removable surface meshes (shell, colourChangeSurface) are left for each non-legacy part.
var partSurfaceMeshCount = new Dictionary <Part, int>();
// TODO: Move orphaned colliders to group root
var progress = 0;
if (collapseMesh)
{
// Debug.Log("Collapsing Mesh for "+group.name);
// Optimization settings
bool doSort = group.optimizations.HasFlag(ModelGroup.Optimizations.SortFrontToBack);
bool canRemoveTubesAndPins = group.optimizations.HasFlag(ModelGroup.Optimizations.RemoveTubesAndPins);
bool canRemoveKnobs = group.optimizations.HasFlag(ModelGroup.Optimizations.RemoveKnobs);
bool canRemoveCompletelyInvisible = group.optimizations.HasFlag(ModelGroup.Optimizations.RemoveInvisible);
bool cullBackfaces = group.optimizations.HasFlag(ModelGroup.Optimizations.BackfaceCulling);
bool randomizeNormals = group.randomizeNormals;
// Split into different meshes depending on whether they have knobs or are transparent.
// 0 = No knobs = Fast track to avoid normal mapping when it isn't required
// 1 = Knobs = Slow track needs normal mapping
// 2 = Transparent No Knobs = Fast track to avoid normal mapping when it isn't required.
// 3 = Transparent Knobs = Slow track since we will not render transparent bricks during visibility tests.
MeshHelper[] meshHelpers = new MeshHelper[] { new MeshHelper(), new MeshHelper(), new MeshHelper(), new MeshHelper() };
Matrix4x4 groupMatrix = group.transform.localToWorldMatrix;
Matrix4x4 groupMatrixInv = groupMatrix.inverse;
// Collect all parts.
var parts = group.GetComponentsInChildren <Part>();
// Collect relevant part mesh renderers along with mesh type information and a randomized rotation for each part.
List <PartMeshRenderer> mrs = new List <PartMeshRenderer>();
foreach (var part in parts)
{
if (progress++ % 200 == 0)
{
EditorUtility.DisplayProgressBar("Processing", "Collecting part renderers.", ((float)progress / parts.Length) * 0.05f);
}
partMeshCount[part] = 0;
if (part.legacy)
{
// Legacy parts only have unstructured meshes.
foreach (var renderer in part.GetComponentsInChildren <MeshRenderer>(true))
{
var partMeshRenderer = new PartMeshRenderer()
{
part = part,
rendererer = renderer,
type = MeshType.Legacy
};
mrs.Add(partMeshRenderer);
partMeshCount[part]++;
}
}
else
{
partSurfaceMeshCount[part] = 0;
foreach (var renderer in part.GetComponentsInChildren <MeshRenderer>(true))
{
var parentName = renderer.transform.parent.name;
// First check if it is a decoration surface since we will not include them in the processing.
if (parentName == "DecorationSurfaces")
{
continue;
}
var partMeshRenderer = new PartMeshRenderer()
{
part = part,
rendererer = renderer.GetComponent <MeshRenderer>()
};
if (parentName == "Knobs") // Is it a knob?
{
partMeshRenderer.type = MeshType.Knob;
}
else if (parentName == "Tubes") // Is it a tube?
{
partMeshRenderer.type = MeshType.Tube;
}
else if (parentName == "ColourChangeSurfaces") // Is it a colour change surface?
{
partMeshRenderer.type = MeshType.ColourChange;
partSurfaceMeshCount[part]++;
}
else // It must be the shell.
{
partMeshRenderer.type = MeshType.Shell;
partSurfaceMeshCount[part]++;
}
mrs.Add(partMeshRenderer);
partMeshCount[part]++;
}
}
}
Vector3 camPos = Vector3.zero;
Vector3 camDir = Vector3.zero;
if (group.views.Count == 0 && Camera.main)
{
camPos = Camera.main.transform.position;
camDir = Camera.main.transform.forward;
}
else if (group.views.Count > 0)
{
camPos = group.views[0].position;
camDir = group.views[0].rotation * Vector3.forward;
}
else
{
doSort = false;
Debug.LogError("No views specified for front-to-back geometry sorting. Disabling!");
}
if (doSort)
{
Vector3 sortDir;
if (group.views.Count == 0)
{
sortDir = camDir;
}
else
{
sortDir = group.views[0].rotation * Vector3.forward;
}
mrs.Sort(delegate(PartMeshRenderer a, PartMeshRenderer b)
{
float dA = Vector3.Dot(a.rendererer.bounds.center, sortDir);
float dB = Vector3.Dot(b.rendererer.bounds.center, sortDir);
return(dA.CompareTo(dB));
});
}
// Multiple passes
// - Collect all meshes
// - Remove original meshfilters and renderers
// - Determine which Optimization level can be used (for legacy meshes only) or if mesh can be discarded completely
// - Remove backfaces
// - Build combined mesh
// Collect meshes
List <MeshInstance> instances = new List <MeshInstance>();
for (int i = 0; i < mrs.Count; ++i)
{
if (i % 200 == 0)
{
EditorUtility.DisplayProgressBar("Processing", "Collecting part meshes.", 0.05f + (float)i / mrs.Count * 0.05f);
}
MeshFilter mf = mrs[i].rendererer.GetComponent <MeshFilter>();
if (mf)
{
if (mrs[i].rendererer.enabled && mrs[i].rendererer.gameObject.activeInHierarchy)
{
Mesh source = mf.sharedMesh;
if (source)
{
meshCount.x++;
triCount.x += (int)source.GetIndexCount(0) / 3;
vertCount.x += source.vertexCount;
Material material = mrs[i].rendererer.sharedMaterial;
MeshInstance c = new MeshInstance();
c.mesh = source;
c.matrix = groupMatrixInv * mf.transform.localToWorldMatrix;
c.worldMatrix = mf.transform.localToWorldMatrix;
c.material = material;
c.transparent = material && material.color.a < 1.0;
c.part = mrs[i].part;
c.type = mrs[i].type;
c.up = mf.transform.up;
c.bounds = mrs[i].rendererer.bounds;
instances.Add(c);
}
}
Object.DestroyImmediate(mf);
}
Object.DestroyImmediate(mrs[i].rendererer);
}
List <Vector3> viewPositions = new List <Vector3>();
List <Vector3> viewDirections = new List <Vector3>();
List <Matrix4x4> viewMatrices = new List <Matrix4x4>();
List <Matrix4x4> projectionMatrices = new List <Matrix4x4>();
List <Plane[]> viewFrustums = new List <Plane[]>();
if (group.views.Count == 0 && Camera.main)
{
viewMatrices.Add(Camera.main.worldToCameraMatrix);
if (Camera.main.orthographic)
{
viewDirections.Add(camDir);
}
else
{
viewPositions.Add(camPos);
}
viewFrustums.Add(GeometryUtility.CalculateFrustumPlanes(Camera.main));
projectionMatrices.Add(Camera.main.projectionMatrix);
}
else if (group.views.Count > 0)
{
for (int i = 0; i < group.views.Count; ++i)
{
var view = group.views[i];
var viewMatrix = Matrix4x4.TRS(view.position, view.rotation, Vector3.one).inverse;
// Invert Z for metal/openGL
if (SystemInfo.usesReversedZBuffer)
{
viewMatrix.SetRow(2, -viewMatrix.GetRow(2));
}
viewMatrices.Add(viewMatrix);
Matrix4x4 projectionMatrix;
Plane[] frustumPlanes;
if (view.perspective)
{
projectionMatrix = Matrix4x4.Perspective(
view.fov,
view.aspect,
view.minRange,
view.maxRange
);
viewPositions.Add(view.position);
frustumPlanes = MathUtils.GetFrustumPlanesPerspective(view.position, view.rotation, view.fov, view.aspect, view.minRange, view.maxRange);
}
else
{
projectionMatrix = Matrix4x4.Ortho(
-view.size * view.aspect,
view.size * view.aspect,
-view.size,
view.size,
view.minRange,
view.maxRange
);
viewDirections.Add(view.rotation * Vector3.forward);
frustumPlanes = MathUtils.GetFrustumPlanesOrtho(view.position, view.rotation, view.size, view.aspect, view.minRange, view.maxRange);
}
projectionMatrices.Add(projectionMatrix);
viewFrustums.Add(frustumPlanes);
}
}
else
{
if (canRemoveTubesAndPins || canRemoveKnobs || canRemoveCompletelyInvisible || cullBackfaces)
{
Debug.LogError("No views specified for backface culling and geometry removal. Disabling!");
canRemoveTubesAndPins = false;
canRemoveKnobs = false;
canRemoveCompletelyInvisible = false;
cullBackfaces = false;
}
}
if (instances.Count > 16777215)
{
Debug.LogError($"Group {group.groupName} contains too many meshes. Some meshes will not be optimized correctly. Please split the group into multiple groups.");
}
AnalyzeMeshes(viewMatrices, projectionMatrices, viewPositions, viewDirections, viewFrustums, instances, partMeshCount, partSurfaceMeshCount, canRemoveTubesAndPins, canRemoveKnobs, canRemoveCompletelyInvisible, group.importSettings.lod);
// Combine instances to a single mesh
for (int i = 0; i < instances.Count; ++i)
{
if (i % 200 == 0)
{
EditorUtility.DisplayProgressBar("Processing", "Combining part meshes.", 0.2f + (float)i / instances.Count * 0.05f);
}
Mesh source = instances[i].mesh;
if (source == null)
{
continue;
}
Matrix4x4 matrix = instances[i].matrix;
Material material = instances[i].material;
int subMesh = instances[i].transparent ? (instances[i].type == MeshType.Knob ? 3 : 2) : instances[i].pixelKnobCount >= knobNormalMapThreshold ? 1 : 0;
MeshHelper mh = new MeshHelper(source);
mh.Transform(matrix);
// Cull backfaces
if (cullBackfaces)
{
for (int t = 0; t < mh.triangles.Count; t += 3)
{
int v0 = mh.triangles[t];
int v1 = mh.triangles[t + 1];
int v2 = mh.triangles[t + 2];
Vector3 triCen = groupMatrix.MultiplyPoint((mh.vertices[v0] + mh.vertices[v1] + mh.vertices[v2]) / 3);
Vector3 triNor = groupMatrix.MultiplyVector(mh.normals[v0] + mh.normals[v1] + mh.normals[v2]);//.normalized;
bool anyInView = false;
for (int v = 0; v < viewPositions.Count; ++v)
{
anyInView |= (Vector3.Dot(viewPositions[v] - triCen, triNor) >= 0);
}
for (int v = 0; v < viewDirections.Count; ++v)
{
anyInView |= (Vector3.Dot(viewDirections[v], triNor) <= 0);
}
if (!anyInView)
{
mh.triangles[t] = -1;
mh.triangles[t + 1] = -1;
mh.triangles[t + 2] = -1;
}
}
mh.triangles.RemoveAll((obj) => obj < 0);
mh.RemoveUnusedVertices();
}
// culled completely?
if (mh.vertices.Count == 0)
{
partMeshCount[instances[i].part]--;
continue;
}
meshCount.y++;
triCount.y += mh.triangles.Count / 3;
vertCount.y += mh.vertices.Count;
// Store color in vertices
mh.SetColor(material);
// Randomize normals
if (randomizeNormals)
{
mh.AddNormalNoise();
}
meshHelpers[subMesh].Combine(mh);
mh = null;
}
EditorUtility.DisplayProgressBar("Processing", "Building new meshes.", 0.3f);
for (int i = 0; i < meshHelpers.Length; ++i)
{
if (meshHelpers[i].vertices.Count > 0)
{
GameObject target = group.gameObject;
if (i > 0)
{
target = new GameObject(group.name + "_subMesh" + i);
Undo.RegisterCreatedObjectUndo(target, "Create sub mesh");
target.transform.SetParent(group.transform, false);
}
MeshFilter mf = Undo.AddComponent <MeshFilter>(target);
MeshRenderer mr = Undo.AddComponent <MeshRenderer>(target);
Mesh m = new Mesh();
meshHelpers[i].ToMesh(m, group.importSettings.lightmapped);
// Need tangents?
if (i > 0)
{
m.RecalculateTangents();
}
// Make static.
target.isStatic = true;
if (group.importSettings.lightmapped)
{
mr.receiveGI = ReceiveGI.Lightmaps;
}
else
{
mr.receiveGI = ReceiveGI.LightProbes;
}
mf.sharedMesh = m;
switch (i)
{
case 0:
{
PartUtility.StoreOptimizedMesh(m, group.parentName + "_" + group.groupName + "_Optimized.asset");
mr.sharedMaterial = AssetDatabase.LoadAssetAtPath <Material>("Packages/com.unity.lego.modelimporter/Materials/LEGO_VertexColor.mat");
break;
}
case 1:
{
PartUtility.StoreOptimizedMesh(m, group.parentName + "_" + group.groupName + "_Optimized_NormalMap.asset");
mr.sharedMaterial = AssetDatabase.LoadAssetAtPath <Material>("Packages/com.unity.lego.modelimporter/Materials/LEGO_VertexColor_NormalMap.mat");
break;
}
case 2:
{
PartUtility.StoreOptimizedMesh(m, group.parentName + "_" + group.groupName + "_Optimized_Transparent.asset");
mr.sharedMaterial = AssetDatabase.LoadAssetAtPath <Material>("Packages/com.unity.lego.modelimporter/Materials/LEGO_VertexColor_Transparent.mat");
break;
}
case 3:
{
PartUtility.StoreOptimizedMesh(m, group.parentName + "_" + group.groupName + "_Optimized_Transparent_NormalMap.asset");
mr.sharedMaterial = AssetDatabase.LoadAssetAtPath <Material>("Packages/com.unity.lego.modelimporter/Materials/LEGO_VertexColor_Transparent_NormalMap.mat");
break;
}
}
}
}
}
// Remove decoration surfaces for non-legacy parts that have no surface meshes left.
progress = 0;
foreach (var entry in partSurfaceMeshCount)
{
if (progress++ % 200 == 0)
{
EditorUtility.DisplayProgressBar("Processing", "Removing unneeded decorations.", 0.3f + (float)progress / partSurfaceMeshCount.Count * 0.25f);
}
if (!entry.Key.legacy && entry.Value == 0)
{
var decorationSurfaces = entry.Key.transform.Find("DecorationSurfaces");
if (decorationSurfaces)
{
Undo.DestroyObjectImmediate(decorationSurfaces.gameObject);
}
}
}
// Remove parts that have no meshes left.
progress = 0;
foreach (var entry in partMeshCount)
{
if (progress++ % 200 == 0)
{
EditorUtility.DisplayProgressBar("Processing", "Removing empty parts.", 0.55f + (float)progress / partMeshCount.Count * 0.25f);
}
if (entry.Value == 0)
{
entry.Key.brick.parts.Remove(entry.Key);
// If no parts are left, remove the brick.
if (entry.Key.brick.parts.Count == 0)
{
Undo.DestroyObjectImmediate(entry.Key.brick.gameObject);
}
else
{
Undo.DestroyObjectImmediate(entry.Key.gameObject);
}
}
}
// Collapse remaining box colliders.
if (collapseCols)
{
// FIXME Move to proper constant.
var colliderSizeBias = 0.02f;
var epsilon = 0.001f;
var allColliders = group.GetComponentsInChildren <BoxCollider>();
// Filter out colliders that are part of connectivity features.
var partColliders = allColliders.Where((c) => c.gameObject.layer != LayerMask.NameToLayer(Connection.connectivityReceptorLayerName) && c.gameObject.layer != LayerMask.NameToLayer(Connection.connectivityConnectorLayerName)).ToArray();
boxColliderCount.x = partColliders.Length;
boxColliderCount.y = partColliders.Length;
bool[] colDeleted = new bool[partColliders.Length];
var collapseHappened = true;
var iterationCount = 0;
while (collapseHappened)
{
collapseHappened = false;
iterationCount++;
for (var i = 0; i < partColliders.Length; ++i)
{
if (i % 200 == 0)
{
EditorUtility.DisplayProgressBar("Processing", "Collapsing colliders - iteration " + iterationCount + ".", 0.8f + (float)i / partColliders.Length * 0.05f);
}
if (colDeleted[i])
{
continue;
}
for (var j = i + 1; j < partColliders.Length; ++j)
{
if (colDeleted[j])
{
continue;
}
var colliderA = partColliders[i];
var colliderB = partColliders[j];
// Check that spaces match up.
var colliderBRotationInALocalSpace = Quaternion.Inverse(colliderA.transform.rotation) * colliderB.transform.rotation;
var euler = colliderBRotationInALocalSpace.eulerAngles;
if (Mathf.Abs(Mathf.Round(euler.x / 90.0f) - euler.x / 90.0f) < epsilon && Mathf.Abs(Mathf.Round(euler.y / 90.0f) - euler.y / 90.0f) < epsilon && Mathf.Abs(Mathf.Round(euler.z / 90.0f) - euler.z / 90.0f) < epsilon)
{
// Check that centers match up.
var colliderBCenterInColliderALocalSpace = colliderA.transform.InverseTransformPoint(colliderB.transform.TransformPoint(colliderB.center));
var centerDiff = colliderBCenterInColliderALocalSpace - colliderA.center;
var axisToMatch = centerDiff.MajorAxis();
var centerProjectedToAxis = centerDiff.SnapToMajorAxis() * centerDiff.magnitude;
if ((centerDiff - centerProjectedToAxis).sqrMagnitude < 0.01f)
{
//Debug.Log(GetGameObjectPath(colliderA.gameObject) + colliderA.transform.GetSiblingIndex() + "\n" + GetGameObjectPath(colliderB.gameObject) + colliderB.transform.GetSiblingIndex());
//Debug.Log("Matched centers on " + axisToMatch);
// Check that size match up.
var colliderBSizeInColliderALocalSpace = colliderA.transform.InverseTransformVector(colliderB.transform.TransformVector(colliderB.size)).Abs();
//Debug.Log("Collider b size in collider a local space: " + colliderBSizeInColliderALocalSpace);
var otherAxis1 = (axisToMatch + 1) % 3;
var otherAxis2 = (axisToMatch + 2) % 3;
if (Mathf.Abs(centerDiff.magnitude - (colliderA.size[axisToMatch] + colliderBSizeInColliderALocalSpace[axisToMatch] + 2.0f * colliderSizeBias) * 0.5f) < epsilon)
{
//Debug.Log("Matched on axis length");
if (Mathf.Abs(colliderA.size[otherAxis1] - colliderBSizeInColliderALocalSpace[otherAxis1]) < epsilon && Mathf.Abs(colliderA.size[otherAxis2] - colliderBSizeInColliderALocalSpace[otherAxis2]) < epsilon)
{
//Debug.Log("Matched other axes");
// Merge collider B into collider A.
colliderA.center += centerDiff.normalized * (colliderBSizeInColliderALocalSpace[axisToMatch] + colliderSizeBias) * 0.5f;
var newSize = colliderA.size;
newSize[axisToMatch] += colliderBSizeInColliderALocalSpace[axisToMatch] + colliderSizeBias;
colliderA.size = newSize;
// Update part and destroy collider game object. Empty parent Colliders game objects will be removed during part clean-up.
var part = colliderB.GetComponentInParent <Part>();
part.colliders.Remove(colliderB);
Undo.DestroyObjectImmediate(colliderB.gameObject);
colDeleted[j] = true;
boxColliderCount.y--;
// Note that a change was made, and run over colliders again when done.
collapseHappened = true;
}
}
}
}
}
}
}
}
if (collapseMesh || collapseCols)
{
// Collect all remaining parts and clean them up.
progress = 0;
var parts = group.GetComponentsInChildren <Part>();
foreach (var part in parts)
{
if (progress++ % 200 == 0)
{
EditorUtility.DisplayProgressBar("Processing", "Cleaning up remaining parts.", 0.85f + (float)progress / parts.Length * 0.15f);
}
CleanupPartGeometryTransforms(part);
}
}
EditorUtility.ClearProgressBar();
}
void Collapse(GameObject go)
{
MeshHelper meshHelper = new MeshHelper();
Mesh mesh = null;
Material material = null;
MeshRenderer[] mrs = go.GetComponentsInChildren <MeshRenderer>();
for (int i = 0; i < mrs.Length; ++i)
{
if (mrs[i].name.Contains("Decoration"))
{
Object.DestroyImmediate(mrs[i].GetComponent <MeshFilter>().sharedMesh);
continue;
}
material = mrs[i].sharedMaterial;
if (mesh == null)
{
mesh = mrs[i].GetComponent <MeshFilter>().sharedMesh;
meshHelper = new MeshHelper(mesh);
meshHelper.Transform(go.transform.worldToLocalMatrix * mrs[i].transform.localToWorldMatrix);
}
else
{
Mesh m = mrs[i].GetComponent <MeshFilter>().sharedMesh;
MeshHelper mh = new MeshHelper(m);
mh.Transform(go.transform.worldToLocalMatrix * mrs[i].transform.localToWorldMatrix);
meshHelper.Combine(mh);
Object.DestroyImmediate(m);
}
}
// Add mesh renderer + mesh filter to base gameobject
meshHelper.ToMesh(mesh, false);
MeshRenderer mr = go.GetComponent <MeshRenderer>();
MeshFilter mf = go.GetComponent <MeshFilter>();
if (mr == null)
{
mr = go.AddComponent <MeshRenderer>();
}
if (mf == null)
{
mf = go.AddComponent <MeshFilter>();
}
mr.sharedMaterial = material;
mf.sharedMesh = mesh;
mesh.name = go.name;
// Delete children
for (int i = go.transform.childCount - 1; i >= 0; i--)
{
Object.DestroyImmediate(go.transform.GetChild(i).gameObject);
}
EditorUtility.SetDirty(mesh);
System.GC.Collect();
}