TriangleMesh can be used to create a SceneMesh via SceneMesh.fromTriangleMesh(), or to update an existing SceneMesh via SceneMesh.updateWithTriangleMesh().

Example usage:

// Create a triangle mesh with 3 vertices and 3 indices (one triangle)
val mesh = TriangleMesh(
    numberVertices = 3,
    numberOfIndices = 3,
    materialRanges = intArrayOf(0, 3),  // All indices use the first material
    materials = arrayOf(material)
)
// Update the vertex positions, normals, and UVs
mesh.updateGeometry(
    startIndex = 0,
    positions = floatArrayOf(
        0f, 0f, 0f,    // Vertex 0
        1f, 0f, 0f,    // Vertex 1
        0f, 1f, 0f     // Vertex 2
    ),
    normals = floatArrayOf(
        0f, 0f, 1f,    // Normal for vertex 0
        0f, 0f, 1f,    // Normal for vertex 1
        0f, 0f, 1f     // Normal for vertex 2
    ),
    uvs = floatArrayOf(
        0f, 0f,        // UV for vertex 0
        1f, 0f,        // UV for vertex 1
        0f, 1f         // UV for vertex 2
    ),
    colors = null      // No per-vertex colors
)
// Update the triangle indices
mesh.updatePrimitives(
    startIndex = 0,
    indices = intArrayOf(0, 1, 2)  // Triangle connecting vertices 0, 1, and 2
)
// Convert to a SceneMesh for rendering
val sceneMesh = SceneMesh.fromTriangleMesh(mesh)

Signature

class TriangleMesh

Constructors

TriangleMesh ( numberVertices , numberOfIndices , materialRanges , materials )

Creates a new triangle mesh with the specified parameters.

Signature

constructor(numberVertices: Int, numberOfIndices: Int, materialRanges: IntArray, materials: Array<SceneMaterial>)

Parameters

numberVertices: Int The number of vertices in the mesh

numberOfIndices: Int The number of indices in the mesh

materialRanges: IntArray Array specifying the range of indices that use each material. Format: start0, end0, start1, end1, ... where each pair defines the start (inclusive) and end (exclusive) indices for a material

materials: Array Array of materials to use for the mesh

Returns

TriangleMesh

Properties

handle : Long [Get]	Signature var handle: Long
materials : Array [Get]	Signature var materials: Array<SceneMaterial>

Methods

destroy ()	Signature fun destroy()
updateGeometry ( startIndex , positions , normals , uvs , colors )	Updates the geometry data of the mesh. Signature fun updateGeometry(startIndex: Int, positions: FloatArray?, normals: FloatArray?, uvs: FloatArray?, colors: IntArray?) Parameters `startIndex: Int` The index of the first vertex to update `positions: FloatArray?` Array of vertex positions as XYZ triplets x0, y0, z0, x1, y1, z1, ... `normals: FloatArray?` Array of vertex normals as XYZ triplets nx0, ny0, nz0, nx1, ny1, nz1, ... `uvs: FloatArray?` Array of texture coordinates as UV pairs u0, v0, u1, v1, ... `colors: IntArray?` Array of vertex colors as ARGB integers
updatePrimitives ( startIndex , indices )	Updates the triangle indices of the mesh. Triangle indices define how vertices are connected to form triangles. Each triplet of indices represents one triangle. Signature fun updatePrimitives(startIndex: Int, indices: IntArray) Parameters `startIndex: Int` The index of the first index to update `indices: IntArray` Array of vertex indices as triplets i0, i1, i2, i3, i4, i5, ... where each triplet (i0,i1,i2) defines one triangle