void Update()
{
if (m_inputJsonString != null && !m_isBboxSet)
{
if (m_inputJsonString.Equals(m_currentlyUsedJsonString))
{
return;
}
m_bbox = BoundingBoxCornersFromString();
setBboxRendering(m_bbox);
m_isBboxSet = true;
if (scaleDatasetDown)
{
doScaleDatasetDown();
}
var worldCenter = this.gameObject.transform.TransformPoint(m_localBboxCenter);
var centerToInitialPos = m_initialTransform.position - worldCenter;
this.gameObject.transform.position = this.gameObject.transform.position + centerToInitialPos;
}
if (m_bboxMesh && renderBbox)
{
Graphics.DrawMesh(m_bboxMesh, this.transform.localToWorldMatrix, m_bboxMaterial, 0);
}
}
BoundingBoxCorners BoundingBoxCornersFromString()
{
BoundingBoxCorners bb = new BoundingBoxCorners();
bb.fromJson(m_inputJsonString);
bb.min = convert.toUnity(bb.min);
bb.max = convert.toUnity(bb.max);
m_currentlyUsedJsonString = m_inputJsonString;
m_inputJsonString = null;
return(bb);
}
private void setBboxRendering(BoundingBoxCorners bbox)
{
var bboxMin = new Vector3(bbox.min.x, bbox.min.y, bbox.min.z);
var bboxMax = new Vector3(bbox.max.x, bbox.max.y, bbox.max.z);
float minX = bboxMin.x;
float minY = bboxMin.y;
float minZ = bboxMin.z;
float maxX = bboxMax.x;
float maxY = bboxMax.y;
float maxZ = bboxMax.z;
var bboxCenter = bboxMin + (bboxMax - bboxMin) * 0.5f;
var signedDiff = (bboxMax - bboxMin);
var diff = new Vector3(Mathf.Abs(signedDiff.x), Mathf.Abs(signedDiff.y), Mathf.Abs(signedDiff.z));
m_scaleDownFactor = 1.0f / Mathf.Max(diff.x, diff.y, diff.z);
// depending on where the rendered dataset image is aligned, set some offsets
// two options: (a) the renderer understands model matrices and will receive a matrix to align the dataset to (0,0,0)
// or (b) we align the dataset used in unity to match the world-space bounding box position we received from the renderer (this slightly breaks dataset rotation)
Vector3 centering = new Vector3(0.0f, 0.0f, 0.0f);
switch (imageAlignment)
{
case DatasetAlignmentMethod.viaRenderer:
centering = -bboxCenter;
break;
case DatasetAlignmentMethod.viaUnity:
centering = new Vector3(0.0f, 0.0f, 0.0f);
break;
}
m_bboxCorrectionTransform.scale = new Vector4(1.0f, 1.0f, 1.0f, 1.0f);
m_bboxCorrectionTransform.rotation_axis_angle_rad = new Vector4(0.0f, 0.0f, 0.0f, 0.0f);
switch (imageAlignment)
{
case DatasetAlignmentMethod.viaRenderer:
m_bboxCorrectionTransform.translation = convert.toOpenGL(-bboxCenter);
m_bboxCorrectionTransform.modelMatrix = Matrix4x4.TRS(m_bboxCorrectionTransform.translation, Quaternion.identity, m_bboxCorrectionTransform.scale);
break;
case DatasetAlignmentMethod.viaUnity:
m_bboxCorrectionTransform.translation = new Vector4(0.0f, 0.0f, 0.0f, 0.0f);;
m_bboxCorrectionTransform.modelMatrix = Matrix4x4.identity;
break;
}
Vector3 meshOffset = new Vector3(0.0f, 0.0f, 0.0f);
Vector3 colliderOffset = new Vector3(0.0f, 0.0f, 0.0f);
switch (imageAlignment)
{
case DatasetAlignmentMethod.viaRenderer:
meshOffset = new Vector3(0.0f, 0.0f, 0.0f);
colliderOffset = new Vector3(0.0f, 0.0f, 0.0f);
break;
case DatasetAlignmentMethod.viaUnity:
meshOffset = signedDiff * 0.5f + bboxMin;
colliderOffset = bboxCenter;
break;
}
// now set the dataset parameters in unity: bounding box wireframe, resized cube mesh, resized mesh collider
Vector3[] bboxVertices = new Vector3[] {
bboxMin + centering, // 0
new Vector3(maxX, minY, minZ) + centering, // 1
new Vector3(minX, maxY, minZ) + centering, // 2
new Vector3(maxX, maxY, minZ) + centering, // 3
new Vector3(minX, minY, maxZ) + centering, // 4
new Vector3(maxX, minY, maxZ) + centering, // 5
new Vector3(minX, maxY, maxZ) + centering, // 6
bboxMax + centering, // 7
};
// connect wire frame
int[] indices = new int[] {
0, 1,
0, 2,
1, 3,
2, 3,
0, 4,
1, 5,
3, 7,
2, 6,
4, 5,
4, 6,
5, 7,
6, 7
};
// set up bbox wire rendering
m_bboxMesh = new Mesh();
m_bboxMesh.vertices = bboxVertices;
m_bboxMesh.SetIndices(indices, MeshTopology.Lines, 0);
m_bboxMaterial = new Material(Shader.Find("Unlit/Color"));
m_bboxMaterial.color = new Color(0.8f, 0.8f, 0.0f); // rgb
// resize cube mesh to size of dataset bounding box
var thisCubeMesh = this.GetComponent <MeshFilter>();
List <Vector3> cubeVertices = new List <Vector3>();
List <Vector3> newCubeVertices = new List <Vector3>();
//thisCubeMesh.mesh.GetVertices(cubeVertices);
// get fresh cube mesh - this is important if the dataset is to be reused for different renderers
var cube = GameObject.CreatePrimitive(PrimitiveType.Cube);
cube.GetComponent <MeshFilter>().mesh.GetVertices(cubeVertices);
foreach (var v in cubeVertices)
{
var newVertex = Vector3.Scale(v, diff * 1.1f) + meshOffset;
newCubeVertices.Add(newVertex);
}
thisCubeMesh.mesh.SetVertices(newCubeVertices);
// recalc to correctly set object pivot to bbox center
thisCubeMesh.mesh.RecalculateBounds();
thisCubeMesh.mesh.RecalculateNormals();
thisCubeMesh.mesh.RecalculateTangents();
GameObject.Destroy(cube);
// set up box collider for controller interaction and so on
var thisBoxCollider = this.GetComponent <BoxCollider>();
if (thisBoxCollider == null)
{
this.gameObject.AddComponent <BoxCollider>();
thisBoxCollider = this.GetComponent <BoxCollider>();
}
thisBoxCollider.enabled = true;
thisBoxCollider.size = diff;
thisBoxCollider.center = colliderOffset;
m_localBboxCenter = colliderOffset;
}
