Hey it’s me again.
I’ve gotten my code up and running and working using my custom shader, but I was just wondering if it would be possible to add shadows using shadowGenerator or if I’d have to implement my own shadow mapping.
I’m currently passing the vertices in through a storageBuffer and then re-using them with transforms in my vertex shader with vertexID, this seems to give about double the performance than using regular instancing.
boidMesh = new Mesh("custom", scene);
boidMesh.setVerticesData(VertexBuffer.PositionKind, [0]);
boidMesh.isUnIndexed = true;
const numVerts = pyramidMesh.vertices.length / 4;
boidMesh.subMeshes[0].verticesCount = numBoids * numVerts;
boidMat.setUInt("numVertices", numVerts);
boidVerticesBuffer = new StorageBuffer(engine, pyramidMesh.vertices.byteLength);
boidVerticesBuffer.update(pyramidMesh.vertices);
boidMat.setStorageBuffer("boidVertices", boidVerticesBuffer);
boidNormalsBuffer = new StorageBuffer(engine, pyramidMesh.normals.byteLength);
boidNormalsBuffer.update(pyramidMesh.normals);
boidMat.setStorageBuffer("boidNormals", boidNormalsBuffer);
boidMesh.material = boidMat;
The issue I’m running into is when I try to add shadows to this mesh, because it’s trying to use the vertexBuffer which technically has a length of 1.
Vertex range (first: 0, count: 576) requires a larger buffer (6912) than the bound buffer size (4) of the vertex buffer at slot 0 with stride 12.
Is there a way to set the shadowGenerator to work with my custom mesh, or will have to generate my own shadowMap and use that?
Source code is here if that helps: GitHub - jtsorlinis/BoidsWebGPU
