scnnode

The goal is to reproduce a light trail similar to the image below in SceneKit. The trail doesn't need to be as detailed, but the idea is to achieve a similar visual effect. We tried using thin cubes with opacity around 0.5. We strung about 200 together and attached them to a node to act as a light trail. That was not performant at all. This other post suggests using particle emitters, but we also need to detect collisions when another object hits the trail. Class documentation says collision detection with particle emitters is also not performant. Any suggestions on the best way to do simulate

Swift 3, SceneKit: In my game, I have an SCNSphere node in the center of the screen. The sphere drops by gravity onto an SCNBox node, and a velocity of SCNVector3(0,6,0) is applied to it once it collides with the box. A new box is created and moves forward (z+) towards my camera and towards the sphere as well. The sphere rises, peaks, and then falls back down (by gravity) towards the new box, and when it collides with the new box, a velocity of SCNVector(0,6,0) is applied to it. This process repeats continuously. A sphere that repeatedly bounces on a new approaching box, basically. Instead of

For a voxel art app, the goal is to let users move and rotate a camera in a SceneKit scene then tap to place a block. The code below lets a user rotate a camera by panning. After the gesture ends, we move an existing block so it is -X units on the camera's Z-axis (i.e., -X units in front of the camera). cameraNode is the scene's point of view and is a child of userNode . When the user moves a joystick, we update the position of userNode. Question: Other SO posts manipulate camera nodes by applying a transform instead of changing the rotation and position properties. Is one approach better than

I'm currently following David Roonqvist's 3D Graphics with SceneKit book. Chapter 5 deals with hit testing, no issues implementing it, but only deals with his testing from mouse events. Now, I know my camera's orientation will ALWAYS intersect a certain geometry. I need to obtain the texture coordinate of the intersecting point between the camera orientation and the geometry. Any pointers as how to go about it? I've been looking all over without much success. Any help is appreciated. I haven't tried this but... SCNHitTestResult returns, among other things, textureCoordinatesWithMappingChannel(

I am working on a ARKit project which needs Ripple animation effect when tapped on Horizontal Plane. For that I have took UIView object and pass that as contents for material of SCNPlane object. I have added Ripple animation to UIView object. Everything works fine. But I can't change the SCNPlane colour to clear color. I can use transparency property for the material. But it is hiding Ripple animation too. So, what I need here is, the background colour of SCNPlane object should be transparent and only Ripple animation should appear to user. Can someone help me on this. This is my code. let

I have a SCNPlane that is added to the scene when a sufficient area is detected for a horizontal surface. The plane appears to be placed in a correct spot, according to the floor/table it's being placed on. The problem is when I drop a SCNNode(this has been consistent whether it was a box, pyramid, 3D-model, etc.) onto the plane, it will eventually find a spot to land and 99% start jiggling all crazy. Very few times has it just landed and not moved at all. I also think this may be cause by the node being dropped and landing slightly below the plane surface. It is not "on top" neither "below"