public bool Initialize(GameObject gameObject)
{
if (gameObject == null || _gameObject != null)
{
return(false);
}
Mesh mesh = gameObject.GetMesh();
Sprite sprite = gameObject.GetSprite();
if (mesh == null && sprite == null)
{
return(false);
}
bool useMesh = true;
if (mesh == null)
{
useMesh = false;
}
RTMesh rtMesh = null;
if (useMesh)
{
Renderer meshRenderer = gameObject.GetMeshRenderer();
if (meshRenderer == null || !meshRenderer.enabled)
{
useMesh = false;
}
rtMesh = RTMeshDb.Get.GetRTMesh(mesh);
if (rtMesh == null)
{
useMesh = false;
}
}
if (rtMesh == null && sprite == null)
{
return(false);
}
List <AABB> vertOverlapAABBs = BuildVertOverlapAABBs(gameObject, useMesh ? null : sprite, useMesh ? rtMesh : null);
if (vertOverlapAABBs.Count == 0)
{
return(false);
}
AABB modelAABB = useMesh ? rtMesh.AABB : ObjectBounds.CalcSpriteModelAABB(gameObject);
var aabbFaces = BoxMath.AllBoxFaces;
_gameObject = gameObject;
if (useMesh)
{
foreach (var aabbFace in aabbFaces)
{
AABB overlapAABB = vertOverlapAABBs[(int)aabbFace];
List <Vector3> overlappedVerts = rtMesh.OverlapModelVerts(overlapAABB);
Plane facePlane = BoxMath.CalcBoxFacePlane(modelAABB.Center, modelAABB.Size, Quaternion.identity, aabbFace);
overlappedVerts = facePlane.ProjectAllPoints(overlappedVerts);
_snapAreaBounds[(int)aabbFace] = new AABB(overlappedVerts);
_snapAreaDesc[(int)aabbFace] = BoxMath.GetBoxFaceAreaDesc(_snapAreaBounds[(int)aabbFace].Size, aabbFace);
}
}
else
{
foreach (var aabbFace in aabbFaces)
{
if (aabbFace != BoxFace.Front && aabbFace != BoxFace.Back)
{
AABB overlapAABB = vertOverlapAABBs[(int)aabbFace];
List <Vector3> overlappedVerts = ObjectVertexCollect.CollectModelSpriteVerts(sprite, overlapAABB);
Plane facePlane = BoxMath.CalcBoxFacePlane(modelAABB.Center, modelAABB.Size, Quaternion.identity, aabbFace);
overlappedVerts = facePlane.ProjectAllPoints(overlappedVerts);
_snapAreaBounds[(int)aabbFace] = new AABB(overlappedVerts);
_snapAreaDesc[(int)aabbFace] = BoxMath.GetBoxFaceAreaDesc(_snapAreaBounds[(int)aabbFace].Size, aabbFace);
}
else
{
_snapAreaBounds[(int)aabbFace] = AABB.GetInvalid();
_snapAreaDesc[(int)aabbFace] = BoxFaceAreaDesc.GetInvalid();
}
}
}
return(true);
}
public static SnapResult SnapHierarchy(GameObject root, SnapConfig snapConfig)
{
const float collectEps = 1e-2f;
const float collectBoxScale = 1e-3f;
bool hierarchyHasMeshes = root.HierarchyHasMesh();
bool hierarchyHasSprites = root.HierarchyHasSprite();
if (!hierarchyHasMeshes && !hierarchyHasSprites)
{
Transform rootTransform = root.transform;
rootTransform.position = snapConfig.SurfaceHitPlane.ProjectPoint(rootTransform.position) + snapConfig.OffsetFromSurface * snapConfig.SurfaceHitNormal;
return(new SnapResult(snapConfig.SurfaceHitPlane, rootTransform.position));
}
ObjectBounds.QueryConfig boundsQConfig = new ObjectBounds.QueryConfig();
boundsQConfig.ObjectTypes = GameObjectType.Sprite | GameObjectType.Mesh;
bool isSurfaceSpherical = snapConfig.SurfaceType == Type.SphericalMesh;
bool isSurfaceTerrain = snapConfig.SurfaceType == Type.UnityTerrain || snapConfig.SurfaceType == Type.TerrainMesh;
bool isSurfaceUnityTerrain = snapConfig.SurfaceType == Type.UnityTerrain;
SurfaceRaycaster raycaster = CreateSurfaceRaycaster(snapConfig.SurfaceType, snapConfig.SurfaceObject, true);
if (snapConfig.SurfaceType != Type.SceneGrid)
{
Transform rootTransform = root.transform;
if (snapConfig.AlignAxis)
{
if (isSurfaceTerrain)
{
rootTransform.Align(Vector3.up, snapConfig.AlignmentAxis);
OBB hierarchyOBB = ObjectBounds.CalcHierarchyWorldOBB(root, boundsQConfig);
if (!hierarchyOBB.IsValid)
{
return(new SnapResult());
}
BoxFace pivotFace = BoxMath.GetMostAlignedFace(hierarchyOBB.Center, hierarchyOBB.Size, hierarchyOBB.Rotation, -Vector3.up);
List <Vector3> collectedVerts = ObjectVertexCollect.CollectHierarchyVerts(root, pivotFace, collectBoxScale, collectEps);
if (collectedVerts.Count != 0)
{
Vector3 vertsCenter = Vector3Ex.GetPointCloudCenter(collectedVerts);
Ray ray = new Ray(vertsCenter + Vector3.up * 1e-3f, -Vector3.up);
GameObjectRayHit surfaceHit = raycaster.Raycast(ray);
if (surfaceHit != null)
{
Vector3 alignmentAxis = surfaceHit.HitNormal;
if (isSurfaceUnityTerrain)
{
Terrain terrain = snapConfig.SurfaceObject.GetComponent <Terrain>();
alignmentAxis = terrain.GetInterpolatedNormal(surfaceHit.HitPoint);
}
Quaternion appliedRotation = rootTransform.Align(alignmentAxis, snapConfig.AlignmentAxis);
hierarchyOBB = ObjectBounds.CalcHierarchyWorldOBB(root, boundsQConfig);
appliedRotation.RotatePoints(collectedVerts, rootTransform.position);
Vector3 sitOnPlaneOffset = ObjectSurfaceSnap.CalculateSitOnSurfaceOffset(hierarchyOBB, new Plane(Vector3.up, surfaceHit.HitPoint), 0.1f);
rootTransform.position += sitOnPlaneOffset;
hierarchyOBB.Center += sitOnPlaneOffset;
Vector3Ex.OffsetPoints(collectedVerts, sitOnPlaneOffset);
Vector3 embedVector = ObjectSurfaceSnap.CalculateEmbedVector(collectedVerts, snapConfig.SurfaceObject, -Vector3.up, snapConfig.SurfaceType);
rootTransform.position += (embedVector + alignmentAxis * snapConfig.OffsetFromSurface);
return(new SnapResult(new Plane(alignmentAxis, surfaceHit.HitPoint), surfaceHit.HitPoint));
}
}
}
else
{
if (!isSurfaceSpherical)
{
rootTransform.Align(snapConfig.SurfaceHitNormal, snapConfig.AlignmentAxis);
OBB hierarchyOBB = ObjectBounds.CalcHierarchyWorldOBB(root, boundsQConfig);
if (!hierarchyOBB.IsValid)
{
return(new SnapResult());
}
BoxFace pivotFace = BoxMath.GetMostAlignedFace(hierarchyOBB.Center, hierarchyOBB.Size, hierarchyOBB.Rotation, -snapConfig.SurfaceHitNormal);
List <Vector3> collectedVerts = ObjectVertexCollect.CollectHierarchyVerts(root, pivotFace, collectBoxScale, collectEps);
if (collectedVerts.Count != 0)
{
Vector3 vertsCenter = Vector3Ex.GetPointCloudCenter(collectedVerts);
// Note: Cast the ray from far away enough so that we don't cast from the interior of the mesh.
// This can happen when the object is embedded inside the mesh surface.
AABB surfaceAABB = ObjectBounds.CalcMeshWorldAABB(snapConfig.SurfaceObject);
float sphereRadius = surfaceAABB.Extents.magnitude;
Vector3 rayOrigin = vertsCenter + snapConfig.SurfaceHitNormal * sphereRadius;
Ray ray = new Ray(rayOrigin, -snapConfig.SurfaceHitNormal);
GameObjectRayHit surfaceHit = raycaster.Raycast(ray);
if (surfaceHit != null)
{
Vector3 alignmentAxis = surfaceHit.HitNormal;
rootTransform.Align(alignmentAxis, snapConfig.AlignmentAxis);
hierarchyOBB = ObjectBounds.CalcHierarchyWorldOBB(root, boundsQConfig);
Vector3 sitOnPlaneOffset = ObjectSurfaceSnap.CalculateSitOnSurfaceOffset(hierarchyOBB, surfaceHit.HitPlane, 0.0f);
rootTransform.position += sitOnPlaneOffset;
rootTransform.position += alignmentAxis * snapConfig.OffsetFromSurface;
return(new SnapResult(new Plane(alignmentAxis, surfaceHit.HitPoint), surfaceHit.HitPoint));
}
else
{
Vector3 alignmentAxis = snapConfig.SurfaceHitNormal;
rootTransform.Align(alignmentAxis, snapConfig.AlignmentAxis);
hierarchyOBB = ObjectBounds.CalcHierarchyWorldOBB(root, boundsQConfig);
Vector3 sitOnPlaneOffset = ObjectSurfaceSnap.CalculateSitOnSurfaceOffset(hierarchyOBB, snapConfig.SurfaceHitPlane, 0.0f);
rootTransform.position += sitOnPlaneOffset;
rootTransform.position += alignmentAxis * snapConfig.OffsetFromSurface;
return(new SnapResult(snapConfig.SurfaceHitPlane, snapConfig.SurfaceHitPlane.ProjectPoint(vertsCenter)));
}
}
}
else
{
Transform surfaceObjectTransform = snapConfig.SurfaceObject.transform;
Vector3 sphereCenter = surfaceObjectTransform.position;
Vector3 radiusDir = (rootTransform.position - sphereCenter).normalized;
float sphereRadius = surfaceObjectTransform.lossyScale.GetMaxAbsComp() * 0.5f;
rootTransform.Align(radiusDir, snapConfig.AlignmentAxis);
OBB hierarchyOBB = ObjectBounds.CalcHierarchyWorldOBB(root, boundsQConfig);
if (!hierarchyOBB.IsValid)
{
return(new SnapResult());
}
BoxFace pivotFace = BoxMath.GetMostAlignedFace(hierarchyOBB.Center, hierarchyOBB.Size, hierarchyOBB.Rotation, -radiusDir);
List <Vector3> collectedVerts = ObjectVertexCollect.CollectHierarchyVerts(root, pivotFace, collectBoxScale, collectEps);
Vector3 sitPoint = sphereCenter + radiusDir * sphereRadius;
Plane sitPlane = new Plane(radiusDir, sitPoint);
Vector3 sitOnPlaneOffset = ObjectSurfaceSnap.CalculateSitOnSurfaceOffset(hierarchyOBB, sitPlane, 0.0f);
rootTransform.position += sitOnPlaneOffset;
hierarchyOBB.Center += sitOnPlaneOffset;
Vector3Ex.OffsetPoints(collectedVerts, sitOnPlaneOffset);
rootTransform.position += radiusDir * snapConfig.OffsetFromSurface;
return(new SnapResult(sitPlane, sitPoint));
}
}
}
else
{
OBB hierarchyOBB = ObjectBounds.CalcHierarchyWorldOBB(root, boundsQConfig);
if (!hierarchyOBB.IsValid)
{
return(new SnapResult());
}
if (isSurfaceTerrain || (!isSurfaceSpherical && snapConfig.SurfaceType == Type.Mesh))
{
Ray ray = new Ray(hierarchyOBB.Center, isSurfaceTerrain ? -Vector3.up : -snapConfig.SurfaceHitNormal);
GameObjectRayHit surfaceHit = raycaster.Raycast(ray);
if (surfaceHit != null)
{
Vector3 sitOnPlaneOffset = ObjectSurfaceSnap.CalculateSitOnSurfaceOffset(hierarchyOBB, surfaceHit.HitPlane, 0.0f);
rootTransform.position += sitOnPlaneOffset;
if (isSurfaceTerrain)
{
hierarchyOBB.Center += sitOnPlaneOffset;
BoxFace pivotFace = BoxMath.GetMostAlignedFace(hierarchyOBB.Center, hierarchyOBB.Size, hierarchyOBB.Rotation, -surfaceHit.HitNormal);
List <Vector3> collectedVerts = ObjectVertexCollect.CollectHierarchyVerts(root, pivotFace, collectBoxScale, collectEps);
Vector3 embedVector = ObjectSurfaceSnap.CalculateEmbedVector(collectedVerts, snapConfig.SurfaceObject, -Vector3.up, snapConfig.SurfaceType);
rootTransform.position += embedVector;
}
rootTransform.position += surfaceHit.HitNormal * snapConfig.OffsetFromSurface;
return(new SnapResult(surfaceHit.HitPlane, surfaceHit.HitPoint));
}
else
if (!isSurfaceSpherical && snapConfig.SurfaceType == Type.Mesh)
{
Vector3 sitOnPlaneOffset = ObjectSurfaceSnap.CalculateSitOnSurfaceOffset(hierarchyOBB, snapConfig.SurfaceHitPlane, 0.0f);
rootTransform.position += sitOnPlaneOffset;
rootTransform.position += snapConfig.SurfaceHitNormal * snapConfig.OffsetFromSurface;
return(new SnapResult(snapConfig.SurfaceHitPlane, snapConfig.SurfaceHitPlane.ProjectPoint(hierarchyOBB.Center)));
}
}
else
if (isSurfaceSpherical)
{
Transform surfaceObjectTransform = snapConfig.SurfaceObject.transform;
Vector3 sphereCenter = surfaceObjectTransform.position;
Vector3 radiusDir = (rootTransform.position - sphereCenter).normalized;
float sphereRadius = surfaceObjectTransform.lossyScale.GetMaxAbsComp() * 0.5f;
BoxFace pivotFace = BoxMath.GetMostAlignedFace(hierarchyOBB.Center, hierarchyOBB.Size, hierarchyOBB.Rotation, -radiusDir);
List <Vector3> collectedVerts = ObjectVertexCollect.CollectHierarchyVerts(root, pivotFace, collectBoxScale, collectEps);
Vector3 sitPoint = sphereCenter + radiusDir * sphereRadius;
Plane sitPlane = new Plane(radiusDir, sitPoint);
Vector3 sitOnPlaneOffset = ObjectSurfaceSnap.CalculateSitOnSurfaceOffset(hierarchyOBB, sitPlane, 0.0f);
rootTransform.position += sitOnPlaneOffset;
hierarchyOBB.Center += sitOnPlaneOffset;
Vector3Ex.OffsetPoints(collectedVerts, sitOnPlaneOffset);
rootTransform.position += radiusDir * snapConfig.OffsetFromSurface;
return(new SnapResult(sitPlane, sitPoint));
}
}
}
if (snapConfig.SurfaceType == Type.SceneGrid)
{
OBB hierarchyOBB = ObjectBounds.CalcHierarchyWorldOBB(root, boundsQConfig);
if (!hierarchyOBB.IsValid)
{
return(new SnapResult());
}
Transform rootTransform = root.transform;
if (snapConfig.AlignAxis)
{
rootTransform.Align(snapConfig.SurfaceHitNormal, snapConfig.AlignmentAxis);
hierarchyOBB = ObjectBounds.CalcHierarchyWorldOBB(root, boundsQConfig);
}
rootTransform.position += ObjectSurfaceSnap.CalculateSitOnSurfaceOffset(hierarchyOBB, snapConfig.SurfaceHitPlane, snapConfig.OffsetFromSurface);
return(new SnapResult(snapConfig.SurfaceHitPlane, snapConfig.SurfaceHitPlane.ProjectPoint(hierarchyOBB.Center)));
}
return(new SnapResult());
}