How to display / determine the index of a vertex in ARSCNFaceGeometry?
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I want to get the index of a specific vertex in the mesh of the ARSCNFaceGeometry.
I tried to add a SCNText to the vertex that displays the vertex index:
// Create face node
let faceNode = SCNNode(geometry: geometry) // geometry is the ARSCNFaceGeometry
// Get vertices of face node
let vertices = ...
// For each vertex
vertices.enumerated().forEach({ (index, vertex) in
// Create text geometry
let textGeometry = SCNText(string: text, extrusionDepth: 1)
textGeometry.firstMaterial?.diffuse.contents = UIColor.black
// Create text node
let textNode = SCNNode(geometry: textGeometry)
textNode.scale = SCNVector3(0.0002, 0.0002, 0.0002)
textNode.position = SCNVector3(vertex.x, vertex.y, vertex.z)
// Add text node to face mask node
faceNode.addChildNode(textNode)
})
But the result in Xcode Scene Editor is that some text nodes are positioned correctly, others are scattered all over the place:
Why are the text nodes positioned like that?
Is there another way to get the vertex indices?
Update:
I tried to add SCNBox to every vertex:
let box = SCNBox(width: 0.005, height: 0.005, length: 0.005, chamferRadius: 0)
box.firstMaterial?.multiply.contents = UIColor.blue
let boxNode = SCNNode(geometry: box)
boxNode = vertex
faceNode.addChildNode(boxNode)
The result shows that even the box positions are wrong. So how can I use the vertex to position each box centered in the mesh point?
xcode scenekit arkit scnnode arfacegeometry
asked Nov 26 '18 at 15:54
ManuelManuel
5,93812052
add a comment |
I want to get the index of a specific vertex in the mesh of the ARSCNFaceGeometry.
I tried to add a SCNText to the vertex that displays the vertex index:
// Create face node
let faceNode = SCNNode(geometry: geometry) // geometry is the ARSCNFaceGeometry
// Get vertices of face node
let vertices = ...
// For each vertex
vertices.enumerated().forEach({ (index, vertex) in
// Create text geometry
let textGeometry = SCNText(string: text, extrusionDepth: 1)
textGeometry.firstMaterial?.diffuse.contents = UIColor.black
// Create text node
let textNode = SCNNode(geometry: textGeometry)
textNode.scale = SCNVector3(0.0002, 0.0002, 0.0002)
textNode.position = SCNVector3(vertex.x, vertex.y, vertex.z)
// Add text node to face mask node
faceNode.addChildNode(textNode)
})
But the result in Xcode Scene Editor is that some text nodes are positioned correctly, others are scattered all over the place:
Why are the text nodes positioned like that?
Is there another way to get the vertex indices?
Update:
I tried to add SCNBox to every vertex:
let box = SCNBox(width: 0.005, height: 0.005, length: 0.005, chamferRadius: 0)
box.firstMaterial?.multiply.contents = UIColor.blue
let boxNode = SCNNode(geometry: box)
boxNode = vertex
faceNode.addChildNode(boxNode)
The result shows that even the box positions are wrong. So how can I use the vertex to position each box centered in the mesh point?
xcode scenekit arkit scnnode arfacegeometry
asked Nov 26 '18 at 15:54
ManuelManuel
5,93812052
add a comment |
I want to get the index of a specific vertex in the mesh of the ARSCNFaceGeometry.
I tried to add a SCNText to the vertex that displays the vertex index:
// Create face node
let faceNode = SCNNode(geometry: geometry) // geometry is the ARSCNFaceGeometry
// Get vertices of face node
let vertices = ...
// For each vertex
vertices.enumerated().forEach({ (index, vertex) in
// Create text geometry
let textGeometry = SCNText(string: text, extrusionDepth: 1)
textGeometry.firstMaterial?.diffuse.contents = UIColor.black
// Create text node
let textNode = SCNNode(geometry: textGeometry)
textNode.scale = SCNVector3(0.0002, 0.0002, 0.0002)
textNode.position = SCNVector3(vertex.x, vertex.y, vertex.z)
// Add text node to face mask node
faceNode.addChildNode(textNode)
})
But the result in Xcode Scene Editor is that some text nodes are positioned correctly, others are scattered all over the place:
Why are the text nodes positioned like that?
Is there another way to get the vertex indices?
Update:
I tried to add SCNBox to every vertex:
let box = SCNBox(width: 0.005, height: 0.005, length: 0.005, chamferRadius: 0)
box.firstMaterial?.multiply.contents = UIColor.blue
let boxNode = SCNNode(geometry: box)
boxNode = vertex
faceNode.addChildNode(boxNode)
The result shows that even the box positions are wrong. So how can I use the vertex to position each box centered in the mesh point?
xcode scenekit arkit scnnode arfacegeometry
asked Nov 26 '18 at 15:54
ManuelManuel
5,93812052
I want to get the index of a specific vertex in the mesh of the ARSCNFaceGeometry.
I tried to add a SCNText to the vertex that displays the vertex index:
// Create face node
let faceNode = SCNNode(geometry: geometry) // geometry is the ARSCNFaceGeometry
// Get vertices of face node
let vertices = ...
// For each vertex
vertices.enumerated().forEach({ (index, vertex) in
// Create text geometry
let textGeometry = SCNText(string: text, extrusionDepth: 1)
textGeometry.firstMaterial?.diffuse.contents = UIColor.black
// Create text node
let textNode = SCNNode(geometry: textGeometry)
textNode.scale = SCNVector3(0.0002, 0.0002, 0.0002)
textNode.position = SCNVector3(vertex.x, vertex.y, vertex.z)
// Add text node to face mask node
faceNode.addChildNode(textNode)
})
But the result in Xcode Scene Editor is that some text nodes are positioned correctly, others are scattered all over the place:
Why are the text nodes positioned like that?
Is there another way to get the vertex indices?
Update:
I tried to add SCNBox to every vertex:
let box = SCNBox(width: 0.005, height: 0.005, length: 0.005, chamferRadius: 0)
box.firstMaterial?.multiply.contents = UIColor.blue
let boxNode = SCNNode(geometry: box)
boxNode = vertex
faceNode.addChildNode(boxNode)
The result shows that even the box positions are wrong. So how can I use the vertex to position each box centered in the mesh point?
xcode scenekit arkit scnnode arfacegeometry
xcode scenekit arkit scnnode arfacegeometry
asked Nov 26 '18 at 15:54
ManuelManuel
5,93812052
asked Nov 26 '18 at 15:54
ManuelManuel
5,93812052
edited Nov 26 '18 at 16:55
Manuel
asked Nov 26 '18 at 15:54
ManuelManuel
5,93812052
asked Nov 26 '18 at 15:54
ManuelManuel
5,93812052
asked Nov 26 '18 at 15:54
ManuelManuel
5,93812052
5,93812052
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
The way I retrieved the vertices from the face mesh was wrong. I use this answer now to extract the vertices and it works.
answered Nov 27 '18 at 13:12
ManuelManuel
5,93812052
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The way I retrieved the vertices from the face mesh was wrong. I use this answer now to extract the vertices and it works.
answered Nov 27 '18 at 13:12
ManuelManuel
5,93812052
add a comment |
The way I retrieved the vertices from the face mesh was wrong. I use this answer now to extract the vertices and it works.
answered Nov 27 '18 at 13:12
ManuelManuel
5,93812052
add a comment |
The way I retrieved the vertices from the face mesh was wrong. I use this answer now to extract the vertices and it works.
answered Nov 27 '18 at 13:12
ManuelManuel
5,93812052
The way I retrieved the vertices from the face mesh was wrong. I use this answer now to extract the vertices and it works.
answered Nov 27 '18 at 13:12
ManuelManuel
5,93812052
answered Nov 27 '18 at 13:12
ManuelManuel
5,93812052
answered Nov 27 '18 at 13:12
ManuelManuel
5,93812052
answered Nov 27 '18 at 13:12
ManuelManuel
5,93812052
5,93812052
add a comment |
add a comment |
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