Recently, I came across the three.js library and I'm eager to incorporate it into my projects. One idea I have is to create a 2D triangle shape with hand holds on the vertices which allow me to adjust the shape in real-time. Can anyone provide guidance on how this can be achieved using three.js?
Check out this impressive demo in the Three.js library:
By implementing raycasting, you can identify which vertices are intersected at any moment. Simply swap out the example geometry with a triangle to test it out.
Once a user clicks and intersects with a vertex, you can begin monitoring the mouse's position and adjust the vertex accordingly. You can utilize canvas coordinates for a basic 2D view or set up an invisible plane in the background to calculate the 3D vector as shown in this demonstration using DragControls.js:
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