scenekit

问题 I've been trying to make a scene with scene kit in which an specified object is always in front of others, despite the fact that it's actually behind the other objects. A similar effect to this used in blender. Apparently, blender uses GUI and a lot of math to transform otherwise 2D objects, but I need this effect in a SCNNode with a SCNGeometry, in other words, a 3D object currently locate in the scene. I considered using category masks, but after reading Apple's documentation I've realized

问题 I've been trying to make a scene with scene kit in which an specified object is always in front of others, despite the fact that it's actually behind the other objects. A similar effect to this used in blender. Apparently, blender uses GUI and a lot of math to transform otherwise 2D objects, but I need this effect in a SCNNode with a SCNGeometry, in other words, a 3D object currently locate in the scene. I considered using category masks, but after reading Apple's documentation I've realized

问题 I have seen some examples demo of ARKit where material A is blocking material B, kind of creating occlusion effect, or black hole, or masking. But all of them seems to be using Unity engine (I might be wrong). I wanted to do this using what Apple provide already. Or maybe using Metal Shader. Wondering if anyone knows a trick that allows this for ARKit or even in SceneKit term, when 2 objects are overlapping, but wanting one object to occlude the other object, leaving the other object empty.

问题 I have seen some examples demo of ARKit where material A is blocking material B, kind of creating occlusion effect, or black hole, or masking. But all of them seems to be using Unity engine (I might be wrong). I wanted to do this using what Apple provide already. Or maybe using Metal Shader. Wondering if anyone knows a trick that allows this for ARKit or even in SceneKit term, when 2 objects are overlapping, but wanting one object to occlude the other object, leaving the other object empty.

问题 Just wanted to know is it possible (I know it is, but how) to draw dashed line in ARSCNView like in the Measure app? Maybe there is a way to use scene nodes out of the box, idk. I've been using the SCNCylinder to draw a straight line and IDK is it possible to reuse it and adjust or we have to use a really different way to make the dashed line. import SceneKit class CylinderLineNode: SCNNode { private(set) var cylinder: SCNCylinder private(set) var positionA: SCNVector3 private(set) var

问题 Just wanted to know is it possible (I know it is, but how) to draw dashed line in ARSCNView like in the Measure app? Maybe there is a way to use scene nodes out of the box, idk. I've been using the SCNCylinder to draw a straight line and IDK is it possible to reuse it and adjust or we have to use a really different way to make the dashed line. import SceneKit class CylinderLineNode: SCNNode { private(set) var cylinder: SCNCylinder private(set) var positionA: SCNVector3 private(set) var

问题 Just wanted to know is it possible (I know it is, but how) to draw dashed line in ARSCNView like in the Measure app? Maybe there is a way to use scene nodes out of the box, idk. I've been using the SCNCylinder to draw a straight line and IDK is it possible to reuse it and adjust or we have to use a really different way to make the dashed line. import SceneKit class CylinderLineNode: SCNNode { private(set) var cylinder: SCNCylinder private(set) var positionA: SCNVector3 private(set) var

问题 Im importing an object in DAE format and I'm wanting to use it as a collision object however it is concave, but I'm having trouble implementing this in code: func addCollisionBox() { let collisionBoxNode = SCNNode() let collisionBox = importedCollisionBox.rootNode.childNodeWithName("pCube2", recursively: false) collisionBoxNode.addChildNode(collisionBox!) collisionBoxNode.position = SCNVector3Make(0, 0, 0) collisionBoxNode.scale = SCNVector3Make(30, 20, 50) //collisionBoxNode.physicsBody =

问题 I´m using Blender to export my models to dae and Xcode to import it to scn . But my problem is that the pivot point is totally wrong placed when I use it in my scene. The strange thing is that the pivot point is positioned right in the model viewer from SceneKit (even as scn ). The World Coordinates are all zeroed. 回答1: Group all the elements of your 3D model in Blender and move your pivot point for that group at a desired place. SceneKit always reads in a position of pivot point in 99.99%

问题 I´m using Blender to export my models to dae and Xcode to import it to scn . But my problem is that the pivot point is totally wrong placed when I use it in my scene. The strange thing is that the pivot point is positioned right in the model viewer from SceneKit (even as scn ). The World Coordinates are all zeroed. 回答1: Group all the elements of your 3D model in Blender and move your pivot point for that group at a desired place. SceneKit always reads in a position of pivot point in 99.99%