3d

问题 I want to create a 2D plane centered on 0,0,0 in 3D world space. Then, I want to define this plane in 2d tile coordinates. So e.g. a plane divided by 3 tiles would become a map of an array [3,3] The issue is that this would still give a tilemap with negative points. The world upper left -1,1 would be 0,0 in the array -1,- would be 1,0 and so on... World: -1,1 0,1 1,1 -1,0 0,0 1,0 -1,-1 0,-1 1,-1 Array: 0,0 0,1 0,2 1,0 1,1 1,2 2,0 2,1 2,2 My main hope with Unity was that I could avoid the math

问题 world { width: 100%; height: 100%; position: absolute; perspective:800px; } bg { width: 100%; height: 100%; position: absolute; z:1; transform:rotateX(20deg) rotateY(10deg); background: url(https://images.pexels.com/photos/1154498/pexels-photo-1154498.jpeg?auto=compress&cs=tinysrgb&h=1250); } layer_wrap { width: 350px; height: 60px; position: absolute; top: 50%; left: 50%; mix-blend-mode: overlay; z:100; perspective:500px; transform-style:flat; backface-visibility:hidden; } layer { position

问题 I am working on a project that will have a 3D model viewer in one fragment. In order to do so, I decided to use sceneform. I have encountered a problem with SceneView, after trying to display it, in my tab fragment. Everything is done according to examples and sceneform documentation, but sceneView display black screen, regardless of the colour I am assigning. Here is scene loader @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { //

问题 I'm learning about more quaternion conversions and I have a question regarding quaternion to spherical rotation conversion code at the following section of this website: http://web.archive.org/web/20041029003853/http://www.j3d.org/matrix_faq/matrfaq_latest.html#Q59 What are angle and sin_angle in this code supposed to be? Angle is never used so I was guessing it's the rotation angle. Is sin_angle supposed to be sin_a? If this was a function returning an array of float with the spherical

问题 I am rendering a 3D Obj model in iOS. http://metalbyexample.com/picking-hit-testing/. I am following the above Tutorial written by WM to find the hit point in the 3D model. Using the above link I can find the intersecting point with 3D model. I want to find the triangular polygon where I touched and I want to find the UV coordinates in the Image texture. How can I do that.. 来源： https://stackoverflow.com/questions/56832882/get-the-triangular-polygon-where-the-ray-point-intersected

问题 Hi I have my stickman with bones etc in blender. I want to use him in my WPF/C# application to make some simple app like shaking hand or move leg. I found some graphic engines but they cost a lot, is there any free solution to import stickman from blender and make some simple animation ? 回答1: Check out Unity. A quick search reveals you can import files from Blender to it: http://docs.unity3d.com/Documentation/Manual/HOWTO-ImportObjectBlender.html 回答2: There are a few options I know of you

问题 Consider this simple example: import SwiftUI struct RotationExample: View { var body: some View { ZStack { Color.red Text("Text I want to hide") .font(.system(size: 48)) } .frame(width: size, height: size) .rotation3DEffect(Angle.degrees(180), axis: (x: 0, y:1, z: 0)) } } struct RotationExample_Previews: PreviewProvider { static var previews: some View { RotationExample() } } When this code is run, the text is shown reversed. I thought when the rotation was applied, the layers would be

问题 I have created a scatterplot3d with a linear model applied. Unfortunately the results of the LM are subtle and need to be emphasised, my question is how can I extend the LM grid outside of the 'cube'. Plot: Code: Plot1 <-scatterplot3d( d$MEI, d$YYYYMM, d$AOELog10, pch=20, grid = FALSE, color = "black", xlab="MEI", ylab="Date", zlab="AOE Log(10)" ) fit <- lm(d$AOELog10 ~ d$MEI+d$Rank) Plot1$plane3d(fit) Now I guess it might be a variable within lm(), but I cant find anything.... 回答1: To see a

问题 How do I apply a vector field obtained via quiver, to an image which causes the pixels to displace in the direction of the vectors (image is warped)? Also, if the vector field I have is 3 dimensional, how would I do this? Think of it as laying down a flat 2 dimensional image over a 3 dimensional terrain. How would I go about viewing this in matlab? Thank you for your time EDIT: I have to warp the image not just in the Z axis, but along the X and Y axes as well. 回答1: Laying down a flat 2

问题 I found one page link: Convert Three.js to .stl for 3D printing? var exporter = new THREE.STLExporter(); var str = exporter.parse(scene); console.log(str); But when I'm using them, not export a stl file. How can I do then? 回答1: The STLExporter.parse() will export the specified object to a string. If you wish to save the string as a file you have to perform some more operations. As a simple approach you can use FileSaver.js for saving the string to a file. First of all you have to download and