appleseed_python_mesh.py

import appleseed as asr

mesh = asr.MeshObject("my_mesh", {})
print mesh

# Vertices
v0 = asr.Vector3f([0.0, 0.0, 0.0])
v1 = asr.Vector3f([1.0, 0.0, 0.0])
v2 = asr.Vector3f([0.0, 0.0, 1.0])

mesh.reserve_vertices(3)
mesh.push_vertex(v0)
mesh.push_vertex(v1)
mesh.push_vertex(v2)
print "Num vertices = ", mesh.get_vertex_count()

# Normals
n0 = asr.Vector3f([0.0, 1.0, 0.0])
n1 = asr.Vector3f([0.0, 1.0, 0.0])
n2 = asr.Vector3f([0.0, 1.0, 0.0])

mesh.reserve_vertex_normals(3)
mesh.push_vertex_normal(n0)
mesh.push_vertex_normal(n1)
mesh.push_vertex_normal(n2)
print "Num normals = ", mesh.get_vertex_normal_count()

# uvs
uv0 = asr.Vector2f([0.0, 0.0])
uv1 = asr.Vector2f([1.0, 0.0])
uv2 = asr.Vector2f([0.0, 1.0])

#mesh.reserve_tex_coors(3)
mesh.push_tex_coords(uv0)
mesh.push_tex_coords(uv1)
mesh.push_tex_coords(uv2)
print "Num UVs = ", mesh.get_vertex_normal_count()

# triangles
mesh.reserve_triangles(1)
tri = asr.Triangle()

# Vertex indices
tri.v0 = 0
tri.v1 = 1
tri.v2 = 2

# Normal indices
tri.n0 = 0
tri.n1 = 1
tri.n2 = 2

# UVs indices
tri.a0 = 0
tri.a1 = 1
tri.a2 = 2

# Material index
tri.pa = 0

mesh.push_triangle(tri)
print "Num triangles = ", mesh.get_triangle_count()

# Now, mesh can be passed to appleseed in the same way as the basic.py script