import {
Mesh,
DataTexture,
CircleGeometry,
InstancedBufferAttribute,
InstancedBufferGeometry,
} from "three";
import { Node } from "../graph/types";
import createNodeSwarmMaterial from "../materials/createNodeSwarmMaterial";
export default function createNodeSwarmMesh(
nodes: Node[],
nodePositionsTexture: DataTexture,
nodeColors: Float32Array,
nodeSizes: Float32Array,
nodeHighlights: Float32Array,
initialCameraDistance: number
) {
const nodeGeom = new CircleGeometry(2, 16);
const geom = new InstancedBufferGeometry();
geom.index = nodeGeom.index;
geom.instanceCount = nodes.length;
geom.setAttribute("position", nodeGeom.attributes.position);
geom.setAttribute("uv", nodeGeom.attributes.uv);
geom.setAttribute("nodeColor", new InstancedBufferAttribute(nodeColors, 3));
geom.setAttribute("nodeSize", new InstancedBufferAttribute(nodeSizes, 1));
geom.setAttribute("nodeHighlight", new InstancedBufferAttribute(nodeHighlights, 1));
const material = createNodeSwarmMaterial(
nodePositionsTexture,
initialCameraDistance
);
const nodeSwarmMesh = new Mesh(geom, material);
nodeSwarmMesh.frustumCulled = false;
return nodeSwarmMesh;
}
