Is there a way to create a mini-map or mini-cam using three.js?
The idea is to have two camera views - one mini-map or "mini-cam" in the top right corner (as shown in the image) and the main camera view covering the rest of the scene without the border.
It seems that achieving this setup is not possible using the viewport method, as we don't want the scene to be cropped off by the x-dimensionality but rather stretch out horizontally.
I have successfully implemented a scene with a minimap, which can be seen at the following link:
I am a bit confused about your note regarding the limitations of using viewports. In the code provided on the webpage above, it is evident that utilizing an orthogonal camera positioned above the scene allows you to adjust the dimensions so that the entire scene is captured in the render. However, it is crucial to maintain the correct aspect ratio to prevent any distortion of the scene.
Alternatively, if you are considering the render-to-texture approach, I have a relevant example at . As mentioned by yaku in his response, you will need to constantly update the position and rotation of the plane mesh to align with the camera. Given the complexity involved in this method, I strongly recommend sticking with the viewport method.
To create a dynamic minimap in your 3D environment, you can generate a geometry object that represents the map layout. This object can be any shape, not restricted to just a plane. Attach this geometry to the camera so that it moves along with the camera's position and remains visible at all times.
Next, utilize the "Render to Texture" technique to generate a texture of the minimap and apply it to the geometry representing the map. There are various resources available online, including on Stack Overflow and within the Three.js examples directory, that provide guidance and examples on how to implement render to texture functionality.
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