def get_transformation(self) -> Matrix44:
"""Returns the transformation matrix to transform the source entity
located with the minimum extension corner of its bounding box in
(0, 0, 0) to the final location including the required rotation.
"""
x, y, z = self.position
rt = self.rotation_type
if rt == RotationType.WHD: # width, height, depth
return Matrix44.translate(x, y, z)
if rt == RotationType.HWD: # height, width, depth
return Matrix44.z_rotate(PI_2) @ Matrix44.translate(
x + self.height, y, z)
if rt == RotationType.HDW: # height, depth, width
return Matrix44.xyz_rotate(PI_2, 0, PI_2) @ Matrix44.translate(
x + self.height, y + self.depth, z)
if rt == RotationType.DHW: # depth, height, width
return Matrix44.y_rotate(-PI_2) @ Matrix44.translate(
x + self.depth, y, z)
if rt == RotationType.DWH: # depth, width, height
return Matrix44.xyz_rotate(0, PI_2, PI_2) @ Matrix44.translate(
x, y, z)
if rt == RotationType.WDH: # width, depth, height
return Matrix44.x_rotate(PI_2) @ Matrix44.translate(
x, y + self.depth, z)
raise TypeError(rt)
def rotate_y(self, angle: float) -> "DXFGraphic":
"""Rotate entity inplace about y-axis, returns `self`
(floating interface).
Args:
angle: rotation angle in radians
"""
return self.transform(Matrix44.y_rotate(angle))
def rotate_y(self, angle: float):
""" Rotate mesh around y-axis about `angle` inplace.
Args:
angle: rotation angle in radians
"""
self.vertices = list(
Matrix44.y_rotate(angle).transform_vertices(self.vertices))
return self
def create_base_block(block: 'BlockLayout', arrow_length=4):
def add_axis(attribs: Dict, m: Matrix44 = None):
start = -X_AXIS * arrow_length / 2
end = X_AXIS * arrow_length / 2
leg1 = Vec3.from_deg_angle(180 - leg_angle) * leg_length
leg2 = Vec3.from_deg_angle(180 + leg_angle) * leg_length
lines = [
block.add_line(start, end, dxfattribs=attribs),
block.add_line(end, end + leg1, dxfattribs=attribs),
block.add_line(end, end + leg2, dxfattribs=attribs),
]
if m is not None:
for line in lines:
line.transform(m)
leg_length = arrow_length / 10
leg_angle = 15
deg_90 = math.radians(90)
# red x-axis
add_axis(attribs={'color': 1, 'layer': BLK_CONTENT})
# green y-axis
add_axis(attribs={
'color': 3,
'layer': BLK_CONTENT
},
m=Matrix44.z_rotate(deg_90))
# blue z-axis
add_axis(attribs={
'color': 5,
'layer': BLK_CONTENT
},
m=Matrix44.y_rotate(-deg_90))
x = -arrow_length * 0.45
y = arrow_length / 20
line_spacing = 1.50
height = arrow_length / 20
block.add_attdef('ROTATION', (x, y),
dxfattribs={
'style': ATTRIBS,
'height': height
})
y += height * line_spacing
block.add_attdef('SCALE', (x, y),
dxfattribs={
'style': ATTRIBS,
'height': height
})
y += height * line_spacing
block.add_attdef('EXTRUSION', (x, y),
dxfattribs={
'style': ATTRIBS,
'height': height
})
def matrix(self):
return Matrix44.y_rotate(math.radians(-90))