Quickstart

1. Read mesh

import meshio
mesh = meshio.read("bunny.obj")
vertices, indices = mesh.points, mesh.cells[0].data

2. Create transform

import glm
MVP = glm.perspective(25, 1, 1, 100) @ glm.translate((0.1, -0.45, -2.5))
MVP = MVP @ glm.xrotate(20) @ glm.yrotate(45) @ glm.scale((5,5,5))

3. Apply transform

vertices = glm.to_vec3(glm.to_vec4(vertices) @ M.T)

4. Generate and sort faces

import numpy as np
faces = vertices[indices]
faces = faces[np.argsort(-faces[...,2].mean(axis=1))]

5. Render

import matplotlib.pyplot as plt
from matplotlib.collections import PolyCollection
fig = plt.figure(figsize=(6,6))
ax = fig.add_axes([0,0,1,1], aspect=1, frameon=False, xlim=[-1,+1], ylim=[-1,+1])
ax.add_collection(PolyCollection(faces[...,:2], alpha=0.85, linewidth = 0.5,
                                 facecolor="white", edgecolor="black"))
plt.show()