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yaya

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legop3
2026-06-07 04:34:27 -04:00
parent adedc945f0
commit 8356d37364
5 changed files with 58 additions and 67 deletions
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webui/src/components/KinectPanel/PointCloudViewer.jsx
+41 -53
View File
@@ -37,25 +37,25 @@ export default function PointCloudViewer({ frame }) {
const THREE = threeRef.current;
if (!scene || !THREE || !currentFrame?.buffer || !visibleRef.current) return;
const pointCount = Number(currentFrame.meta?.pointCount) || 0;
const strideBytes = Number(currentFrame.meta?.strideBytes) || 16;
if (!pointCount || strideBytes < 16) return;
const view = new DataView(currentFrame.buffer);
const width = Number(currentFrame.meta?.width) || 0;
const height = Number(currentFrame.meta?.height) || 0;
const gridPointCount = width * height;
const isGridFrame = Boolean(currentFrame.meta?.grid) && gridPointCount > 0;
const vertexCount = isGridFrame ? gridPointCount : pointCount;
const positions = new Float32Array(vertexCount * 3);
const colors = new Float32Array(vertexCount * 3);
const valid = isGridFrame ? new Uint8Array(vertexCount) : null;
const zValues = isGridFrame ? new Float32Array(vertexCount) : null;
if (!currentFrame.meta?.grid || !gridPointCount || strideBytes < 16) {
disposeRenderedObject();
return;
}
const view = new DataView(currentFrame.buffer);
const positions = new Float32Array(gridPointCount * 3);
const colors = new Float32Array(gridPointCount * 3);
const valid = new Uint8Array(gridPointCount);
const zValues = new Float32Array(gridPointCount);
// The server sends x/y/z as little-endian floats followed by rgba bytes.
// Building typed arrays only when the canvas is visible keeps expensive
// browser-side point conversion from happening while the card is off-screen.
for (let index = 0; index < vertexCount; index += 1) {
for (let index = 0; index < gridPointCount; index += 1) {
const source = index * strideBytes;
const target = index * 3;
positions[target + 0] = view.getFloat32(source + 0, true);
@@ -65,58 +65,46 @@ export default function PointCloudViewer({ frame }) {
colors[target + 0] = view.getUint8(source + 12) / 255;
colors[target + 1] = view.getUint8(source + 13) / 255;
colors[target + 2] = view.getUint8(source + 14) / 255;
if (isGridFrame) {
valid[index] = view.getUint8(source + 15) > 0 ? 1 : 0;
zValues[index] = z;
}
valid[index] = view.getUint8(source + 15) > 0 ? 1 : 0;
zValues[index] = z;
}
const geometry = new THREE.BufferGeometry();
geometry.setAttribute('position', new THREE.BufferAttribute(positions, 3));
geometry.setAttribute('color', new THREE.BufferAttribute(colors, 3));
let object = null;
if (isGridFrame) {
const indices = [];
const maxDepthStepMeters = 0.12;
const canConnect = (a, b, c) => {
if (!valid[a] || !valid[b] || !valid[c]) return false;
const minZ = Math.min(zValues[a], zValues[b], zValues[c]);
const maxZ = Math.max(zValues[a], zValues[b], zValues[c]);
return maxZ - minZ <= maxDepthStepMeters;
};
const indices = [];
const maxDepthStepMeters = 0.12;
const canConnect = (a, b, c) => {
if (!valid[a] || !valid[b] || !valid[c]) return false;
const minZ = Math.min(zValues[a], zValues[b], zValues[c]);
const maxZ = Math.max(zValues[a], zValues[b], zValues[c]);
return maxZ - minZ <= maxDepthStepMeters;
};
// Kinect depth is a regular image. Each 2x2 pixel cell can become two
// triangles, but only when all vertices are valid and close in depth. The
// depth-step check prevents the mesh from drawing sheets across object
// edges, missing-depth holes, or foreground/background gaps.
for (let y = 0; y < height - 1; y += 1) {
for (let x = 0; x < width - 1; x += 1) {
const a = y * width + x;
const b = a + 1;
const c = a + width;
const d = c + 1;
if (canConnect(a, c, b)) indices.push(a, c, b);
if (canConnect(b, c, d)) indices.push(b, c, d);
}
// Kinect depth is a regular image. Each 2x2 pixel cell can become two
// triangles, but only when all vertices are valid and close in depth. The
// depth-step check prevents the mesh from drawing sheets across object
// edges, missing-depth holes, or foreground/background gaps.
for (let y = 0; y < height - 1; y += 1) {
for (let x = 0; x < width - 1; x += 1) {
const a = y * width + x;
const b = a + 1;
const c = a + width;
const d = c + 1;
if (canConnect(a, c, b)) indices.push(a, c, b);
if (canConnect(b, c, d)) indices.push(b, c, d);
}
geometry.setIndex(indices);
geometry.computeVertexNormals();
const material = new THREE.MeshBasicMaterial({
vertexColors: true,
side: THREE.DoubleSide,
});
object = new THREE.Mesh(geometry, material);
} else {
const material = new THREE.PointsMaterial({
size: 0.018,
vertexColors: true,
sizeAttenuation: true,
});
object = new THREE.Points(geometry, material);
}
geometry.setIndex(indices);
geometry.computeVertexNormals();
const material = new THREE.MeshBasicMaterial({
vertexColors: true,
side: THREE.DoubleSide,
});
const object = new THREE.Mesh(geometry, material);
geometry.computeBoundingSphere();
disposeRenderedObject();
objectRef.current = object;
webui/src/components/KinectPanel/index.jsx
+4 -1
View File
@@ -31,7 +31,10 @@ export default function KinectPanel() {
const handlePointCloudFrame = (meta = {}, buffer) => {
const normalized = normalizeBinaryPayload(buffer);
if (!normalized) return;
// The current 3D viewer only supports grid frames because the mesh needs
// the original Kinect pixel layout. Ignore old packed-point cached
// frames so they cannot silently render as the retired dot-cloud view.
if (!normalized || !meta?.grid) return;
setPointCloudFrame({ meta, buffer: normalized });
setActiveView('3d');
setRequestError(null);