I recently completed rendering 3D objects (JSON and OBJ models) using the Three.js framework. I am now looking to render the scene in the Cesium framework based on Geo Coordinates.
Has anyone attempted this integration before? Any insights, articles, or sample applications on how to combine Cesium and Thress.js would be greatly appreciated.
Over time, both Cesium and Three.js have evolved to better support the glTF 3D model format, endorsed by the Khronos group. This has become the preferred method for rendering 3D models in Cesium.
Cesium and Three.js have distinct rendering engines due to their different goals - while Three.js prioritizes flexibility and ease of use, Cesium focuses on achieving precision at planetary scales or beyond. Cesium's shaders perform 64-bit math with position data to ensure millimeter-level accuracy on a massive scale planet. Additionally, Cesium employs a system of using multiple view frustums to allow for Solar-system-sized rendering, dividing the total view volume into segments to accomplish this effectively.
It is advisable to choose the appropriate rendering engine based on the specific requirements of your project, taking into account the unique features and strengths of each engine. Attempting to blend Cesium and Three.js may not be the optimal solution.
Finding a solution to your specific problem may require some creative thinking, as there is no straightforward answer in either project. It could be feasible to create wrappers around Three objects to match them with Cesium equivalents, but the lack of existing implementations suggests limited practicality. However, developing a Three.js adapter for Cesium could still be an interesting challenge.
In many scenarios, it might be more efficient to solely utilize Cesium rather than trying to integrate Three.js elements. For example, opting for Cesium's BoxGeometry over Three.js' BoxGeometry can simplify the process.
If you want to incorporate your .obj file into cesium, one way is by utilizing blender to export your 3d model in the form of a collada .dae file. After that, you can make use of the 'collada to gltf' converter available at [ to transform it into a .glb (gl binary)
Following that, within your html code, you have the option of adding your object as an entity to the viewer. As an illustration,
var building = viewer.entities.add({
position: Cesium.Cartesian3.fromDegrees(-1.679800, 51.997300, 180.75),
model: {
uri: '/models/myBuilding.glb',
minimumPixelSize: 64
}
});
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