230622 - Fixing issues: Adjust clipping plane & Adjust Converting step size

[prev_230621] #10
fixing two issues from previous document
- adjust clipping plane (for fix rendering distance)
- adjust Converting step size (for fix converted file size)

🗂 Works 작업내용

[three.js] Adjust clipping plane (for fix rendering distance)

[trimesh] Adjust Converting step size (for fix converted file size)

[three.js] Adjust clipping plane (for fix rendering distance) 📌

❓ problem : clipping plane

the model is partially obscured by the background.
(guessing) appears to be a problem with the camera's rendering distance range.

❗ adjust three.js camera

reason : clipping plane is too close to the camera, model is clipping

PerspectiveCamera#far : https://threejs.org/docs/#api/en/cameras/PerspectiveCamera.far

const camera = new THREE.PerspectiveCamera(
30, // 시야각
innerWidth / innerHeight, // camera ratio
1, // near
3000 // far, default is 2000 ✔
);

[trimesh] Adjust Converting step size (for fix converted file size) 📌

❓ problem : converted ply file is too large for push to github

solution: : adjust step_size parameter of marching_cubes() from trimesh


def marching_cubes(volume, level=None, *, spacing=(1., 1., 1.),
gradient_direction='descent', step_size=1,
allow_degenerate=True, method='lewiner', mask=None):

Parameters

volume : (M, N, P) array Input data volume to find isosurfaces. Will internally be converted to float32 if necessary. level : float, optional Contour value to search for isosurfaces in volume. If not given or None, the average of the min and max of vol is used. spacing : length-3 tuple of floats, optional Voxel spacing in spatial dimensions corresponding to numpy array indexing dimensions (M, N, P) as in volume. gradient_direction : string, optional Controls if the mesh was generated from an isosurface with gradient descent toward objects of interest (the default), or the opposite, considering the left-hand rule. The two options are:

descent : Object was greater than exterior
ascent : Exterior was greater than object step_size : int, optional Step size in voxels. Default 1. Larger steps yield faster but coarser results. The result will always be topologically correct though. allow_degenerate : bool, optional Whether to allow degenerate (i.e. zero-area) triangles in the end-result. Default True. If False, degenerate triangles are removed, at the cost of making the algorithm slower. method: {'lewiner', 'lorensen'}, optional Whether the method of Lewiner et al. or Lorensen et al. will be used. mask : (M, N, P) array, optional Boolean array. The marching cube algorithm will be computed only on True elements. This will save computational time when interfaces are located within certain region of the volume M, N, P-e.g. the top half of the cube-and also allow to compute finite surfaces-i.e. open surfaces that do not end at the border of the cube.