def embed_label(model, face, side, label, glyph):
# transform face to shape (into which we will embed the label)
transform = MtxMath.conv_to_euclid(VecMath.rotate_fromto_matrix(face._norm, np.array([0., 0., 1.])))
vertices = [transform * euclid.Point3(v[0], v[1], v[2]) for v in face._vertices]
target_path = svg.Path.from_shape(svg.Shape([np.array([v[0], v[1]]) for v in vertices]))
# render label into path
label_path = svg.Path.combine([(glyph[int(c)], np.array([1., 0.])) for c in label])
# move/scale label to fit into target triangle
p, s, r = fit_rect_in_triangle(vertices, side, label_path._bbox)
label_path.scale(s[0], s[1])
pivot = label_path._bbox._center+np.array([0, label_path._bbox._size[1]*-.5])
label_path.rotate(r, anchor=pivot)
label_path.translate(p-pivot)
# embed the label
embedded_model = target_path.embed([label_path.triangulate(z=vertices[0].z)], group_name='svg', z=vertices[0].z)
embedded_model.transform(transform.inverse())
# (optional) extrude the label
embedded_model.get_group('svg')._material._diffuse = [1., 0., 0.]
embedded_model.extrude(-.5, faces=embedded_model.get_group('svg')._faces)
# replace initial face with new 'labeled face'
model.remove_face(face)
model.merge(embedded_model)
return embedded_model
def write_obj_normals(file, model, transform):
"""Write vertex normals to obj file"""
file.write(f'\n')
for face in model._faces:
n = transform * euclid.Point3(face._norm[0], face._norm[1],
face._norm[2]).normalized()
file.write('vn %.4f %.4f %.4f\n' % tuple(n[:3]))
def get_path_from_face(face):
transform = MtxMath.conv_to_euclid(
VecMath.rotate_fromto_matrix(face._norm, np.array([0., 0., 1.])))
vertices = [
transform * euclid.Point3(v[0], v[1], v[2]) for v in face._vertices
]
path = svg.Path.from_shape(
svg.Shape([np.array([v[0], v[1]]) for v in vertices]))
return path, transform
def add_model(self, model):
center = model._center
self.translate(-center[0], -center[1], -center[2])
for group in model._groups:
vertices = []
normals = []
for face in group._faces:
for tv in face._vertices:
v = self._transforms * euclid.Point3(tv[0], tv[1], tv[2])
vertices.extend(v[:])
n = self._transforms * euclid.Point3(face._norm[0], face._norm[1], face._norm[2]).normalized()
normals.extend(n[:])
material = Material(group._material._name)
material.diffuse = group._material._diffuse
self._batch.add(len(vertices) // 3,
GL_TRIANGLES,
material,
('v3f/static', tuple(vertices)),
('n3f/static', tuple(normals)),
)
def write(model, filename, orientation_vec=None):
"""Rotate and center object to lay flat on the heat-bead"""
model._update()
if orientation_vec is None:
transform = euclid.Matrix4.new_translate(-model._center[0],
-model._center[1],
-model._center[2])
else:
transform = MtxMath.conv_to_euclid(
VecMath.rotate_fromto_matrix(orientation_vec,
np.array([0., 0., -1.])))
n = transform * euclid.Point3(-model._center[0], -model._center[1],
-model._center[2])
transform = euclid.Matrix4.new_translate(n.x, n.y, n.z) * transform
write_obj(model, filename, transform=transform)
b = height * 0.5
n = euclid.Vector2(side.v[1], side.v[0]).normalized()
position = side.p + side.v * .5 - 2 * n
rotation = rotation_angle(n, euclid.Vector2(0., rectangle._size[1]))
scaling = euclid.Point2(0.1, 0.1)
return position, scaling, rotation
if __name__ == "__main__":
label = '726'
model = Model()
vertices = [
euclid.Point3(128.36, -3.32, -13.75),
euclid.Point3(129.77, 91.40, -13.75),
euclid.Point3(103.81, 61.64, -13.75)
]
target_path = svg.Path.from_shape(
svg.Shape([np.array([v[0], v[1]]) for v in vertices]))
# render label into path
glyph = svg.Path.read(f'./example/svg/0123.svg', flip_y=True)
label_path = svg.Path.combine([(glyph[int(c)], np.array([1., 0.]))
for c in label])
p, s, r = fit_rect_in_triangle(vertices, 1, label_path._bbox)
label_path.scale(s[0], s[1])
pivot = label_path._bbox._center + np.array(
[0, label_path._bbox._size[1] * -.5])
def write_obj_vertices(file, model, transform):
"""Write vertices to obj file"""
file.write(f'\n')
for v in model._vertices:
vertex = transform * euclid.Point3(v[0], v[1], v[2])
file.write('v %.4f %.4f %.4f\n' % tuple(vertex[:3]))