To ensure that the metadata popup window moves seamlessly with its corresponding node, it's crucial to update its position in real-time as the node or camera moves. This can be achieved by integrating the position update logic within the animation loop.
Incorporate a method to continuously update the metadata popup's position based on the node's world position and the camera's perspective.
animate() {
requestAnimationFrame(this.animate.bind(this));
// Existing animate logic...
// Update metadata positions
this.updateModalPositions();
this.controls.update();
this.renderer.render(this.scene, this.camera);
}
updateModalPositions() {
const modal = document.getElementById('nodeMetadataModal');
if (modal && modal.classList.contains('visible') && this.selectedNode) {
const rect = this.renderer.domElement.getBoundingClientRect();
const nodeWorldPos = new THREE.Vector3();
this.selectedNode.getWorldPosition(nodeWorldPos);
const nodeScreenPos = nodeWorldPos.clone().project(this.camera);
const x = ((nodeScreenPos.x + 1) / 2) * rect.width + rect.left;
const y = ((-nodeScreenPos.y + 1) / 2) * rect.height + rect.top;
modal.style.left = `${x}px`;
modal.style.top = `${y}px`;
}
}
Ensure that any camera movement triggers an update to the metadata popup's position. This can be achieved by adding an event listener to the camera controls.
this.controls.addEventListener('change', this.updateModalPositions.bind(this));
When dragging nodes, continuously update the modal's position to follow the node.
onMouseMove(event) {
if (this.isDragging && this.selectedNode) {
// Existing dragging logic...
// Update modal position
this.updateModalPositions();
}
}
A modern, rectangular design for the metadata popup enhances readability and user interaction. Applying consistent styling ensures that the modal aligns with contemporary UI standards.
Create a clean and visually appealing rectangular modal using CSS properties such as border-radius
, box-shadow
, and padding
.
#nodeMetadataModal {
position: fixed;
width: 300px;
background: #ffffff;
border-radius: 8px;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
padding: 16px;
z-index: 1000;
font-family: Arial, sans-serif;
color: #333;
display: none;
}
#nodeMetadataModal.visible {
display: block;
}
#nodeMetadataModal .modal-header {
font-size: 18px;
font-weight: bold;
margin-bottom: 12px;
}
#nodeMetadataModal .modal-content {
font-size: 14px;
line-height: 1.5;
margin-bottom: 16px;
}
#nodeMetadataModal .modal-actions {
display: flex;
gap: 8px;
}
#nodeMetadataModal .modal-actions button {
padding: 8px 12px;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 14px;
}
#nodeMetadataModal .edit-button {
background: #4CAF50;
color: white;
}
#nodeMetadataModal .delete-button {
background: #F44336;
color: white;
}
Ensure the modal is responsive and maintains its design across various screen sizes.
@media (max-width: 600px) {
#nodeMetadataModal {
width: 90%;
padding: 12px;
}
}
Incorporate the styled modal into your HTML structure to ensure it functions correctly.
<!-- Metadata Modal -->
<div id="nodeMetadataModal" class="fixed bg-white rounded-lg shadow-lg p-4 z-50 hidden">
<div class="modal-header" id="nodeLabel">Node Label</div>
<div class="modal-content" id="nodeContent">Click to add content...</div>
<div class="modal-actions">
<button class="edit-button">Edit</button>
<button class="delete-button">Delete</button>
</div>
</div>
Adopting a modern CSS framework such as Tailwind CSS or Material UI can significantly streamline the styling process and ensure consistency across your application.
Add the Tailwind CSS CDN link to your HTML's <head>
section.
<link href="https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css" rel="stylesheet">
Modify the modal's HTML to utilize Tailwind's utility classes for enhanced styling.
<div id="nodeMetadataModal" class="fixed bg-white rounded-lg shadow-lg p-4 z-50 hidden">
<div class="flex justify-between items-center mb-4">
<h3 id="nodeLabel" class="text-lg font-bold">Node Label</h3>
<button class="close-button text-gray-500 hover:text-gray-700">×</button>
</div>
<div id="nodeContent" class="text-sm text-gray-700 mb-4">Click to add content...</div>
<div class="flex gap-2">
<button class="edit-button bg-blue-500 text-white px-3 py-1 rounded">Edit</button>
<button class="delete-button bg-red-500 text-white px-3 py-1 rounded">Delete</button>
</div>
</div>
Enhance user interactions by incorporating animations and transitions, making the interface feel more responsive and modern.
#nodeMetadataModal {
transition: all 0.3s ease-in-out;
}
#nodeMetadataModal.visible {
opacity: 1;
transform: translate(-50%, -100%);
}
#nodeMetadataModal.hidden {
opacity: 0;
transform: translate(-50%, -110%);
}
Utilize CSS Flexbox and Grid to create a structured and adaptable layout, ensuring that elements are well-aligned and responsive.
.modal-header, .modal-actions {
display: flex;
justify-content: space-between;
align-items: center;
}
.modal-actions {
gap: 10px;
}
As your 3D knowledge map scales, performance can become an issue. Implementing optimization techniques ensures a smooth user experience.
For rendering a large number of similar objects, THREE.InstancedMesh
can significantly reduce the rendering load.
// Example of creating an InstancedMesh for nodes
const count = 1000;
const geometry = new THREE.SphereGeometry(2, 32, 32);
const material = new THREE.MeshBasicMaterial({ color: 0x4CAF50 });
const instancedMesh = new THREE.InstancedMesh(geometry, material, count);
const dummy = new THREE.Object3D();
for (let i = 0; i < count; i++) {
dummy.position.set(
Math.random() * 1000 - 500,
Math.random() * 1000 - 500,
Math.random() * 1000 - 500
);
dummy.updateMatrix();
instancedMesh.setMatrixAt(i, dummy.matrix);
}
scene.add(instancedMesh);
Ensuring your application is accessible improves usability for all users. Implement ARIA labels and keyboard navigation to enhance accessibility.
<button aria-label="Edit Node" class="edit-button bg-blue-500 text-white px-3 py-1 rounded">Edit</button>
<button aria-label="Delete Node" class="delete-button bg-red-500 text-white px-3 py-1 rounded">Delete</button>
Implement keyboard shortcuts for common actions to improve accessibility.
// Example: Press 'E' to edit a node
document.addEventListener('keydown', (event) => {
if (event.key === 'e' && this.selectedNode) {
this.showNodeCustomizationMenu(this.selectedNode);
}
});
By implementing the strategies outlined above, you can effectively debug and enhance your 3D knowledge map. Ensuring metadata popups move seamlessly with nodes, adopting a modern rectangular design, and enhancing the overall user interface will result in a more intuitive and visually appealing application. Additionally, optimizing performance and enhancing accessibility will provide a robust and user-friendly experience.