Last active
August 2, 2024 09:55
-
-
Save banjun/e53c77f05ccd1dab90c6efed0a3a8c32 to your computer and use it in GitHub Desktop.
Create Plane USDA
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import simd | |
| func generatePlaneMesh(lengthInMeter: Float = 1, divisions: Int = 100, name: String = "GeneratedPlane") { | |
| let n = divisions | |
| let xys: [(Int, Int)] = (0..<n).flatMap { y in (0..<n).map { x in (x, y) }} | |
| let points: [SIMD3<Float>] = xys.map { x, y in | |
| SIMD3(Float(x) / Float(n - 1) - 0.5, Float(y) / Float(n - 1) - 0.5, 0) * lengthInMeter | |
| } | |
| let faceVertexIndices: [Int] = xys.flatMap { x, y in | |
| guard x < n - 1, y < n - 1 else { return [Int]() } | |
| let o = x + y * n | |
| return [o, o + 1, o + 1 + n, o + n] | |
| } | |
| let faceVertexCounts: [Int] = .init(repeating: 4, count: faceVertexIndices.count / 4) | |
| // USDA | |
| print("") | |
| print("#usda 1.0") | |
| print("") | |
| print("def Mesh \"\(name)\" {") | |
| print(" float3[] points = \(points.map {($0.x, $0.y, $0.z)})") | |
| print(" int[] faceVertexIndices = \(faceVertexIndices)") | |
| print(" int[] faceVertexCounts = \(faceVertexCounts)") | |
| print("}") | |
| print("") | |
| } | |
| generatePlaneMesh() |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment