 |
CLIP Score: 29.58
from AIDL import *
def macbook_chair(
seat_width: float = 12 * inches,
seat_depth: float = 10 * inches,
back_height: float = 14 * inches,
leg_height: float = 6 * inches,
leg_thickness: float = 0.75 * inches,
brace_width: float = 2 * inches
):
"""
Creates a model for a simple MacBook chair with a flat seat, inclined back support
and four legs with braces for stability.
"""
# Main structure of the chair
chair = Solid()
# Define substructures
seat = Solid()
back_support = Solid()
legs = [Solid() for _ in range(4)]
braces = [Solid() for _ in range(4)]
chair.seat = seat
chair.back_support = back_support
chair.legs = legs
chair.braces = braces
# Constraints for positioning and aligning the structures
# 1. Align the seat and back support, set seat size
seat.AddConstraint(seat.bb.width == seat_width)
seat.AddConstraint(seat.bb.height == seat_depth)
# Define the seat geometry
seat.base = Rectangle((0, 0), seat_width, seat_depth)
# Ensure symmetrical placement of the seat
seat.AddConstraint(HorizontallySymmetric(seat.base.bottom_left, seat.base.bottom_right))
# 2. Align back support to the seat
back_support.AddConstraint(back_support.bb.width == seat_width)
back_support.AddConstraint(back_support.bb.height == back_height)
# Define the back support geometry
back_support.support = Rectangle((0, 0), seat_width, back_height)
# Align back support with the seat
chair.AddConstraint(Coincident(back_support.support.bottom_left, seat.base.top_left))
chair.AddConstraint(Coincident(back_support.support.bottom_right, seat.base.top_right))
# 3. Set constraints for legs; positions relative to the seat
for leg in legs:
leg.AddConstraint(leg.bb.height == leg_height)
leg.AddConstraint(leg.bb.width == leg_thickness)
# Define the leg geometry
leg.geometry = Rectangle((0, 0), leg_thickness, leg_height)
# Position legs at corners of the seat
chair.AddConstraint(Coincident(legs[0].geometry.top_left, seat.base.bottom_left))
chair.AddConstraint(Coincident(legs[1].geometry.top_right, seat.base.bottom_right))
chair.AddConstraint(Coincident(legs[2].geometry.top_left, seat.base.top_left))
chair.AddConstraint(Coincident(legs[3].geometry.top_right, seat.base.top_right))
# Constraints for braces
for brace in braces:
brace.AddConstraint(brace.bb.width == brace_width)
brace.AddConstraint(brace.bb.height == leg_thickness / 2)
# Define the brace geometry
brace.geometry = Rectangle((0, 0), brace_width, leg_thickness / 2)
# Position braces for stability using valid midpoint attributes
chair.AddConstraint(Coincident(braces[0].geometry.left.midpoint, legs[0].geometry.right.midpoint))
chair.AddConstraint(Coincident(braces[1].geometry.left.midpoint, legs[1].geometry.right.midpoint))
chair.AddConstraint(Coincident(braces[2].geometry.left.midpoint, legs[2].geometry.right.midpoint))
chair.AddConstraint(Coincident(braces[3].geometry.left.midpoint, legs[3].geometry.right.midpoint))
return chair
with AIDL_2D:
model = macbook_chair()
print(model.Solve())
model.Render()
|
Please write an AIDL program to generate a macbook chair
Sure! Let's begin by breaking down the design of a MacBook chair into smaller components and structures. Given the description of the AIDL language and constraints, we'll design a chair that would support a MacBook. This chair could have a flat base, back support, and perhaps some slats or braces for stability.
Let's follow the steps to create a 2D constrained CAD model for it:
1. **Define the main structures and their hierarchy**.
2. **Apply necessary constraints to ensure proper alignment and positioning**.
3. **Define the geometry for each structure**.
4. **Solve the model and render it**.
I'll outline the structures and then proceed to implementing them.
### Chair Overview
- **Base**: A flat rectangular support.
- **Back Support**: An inclined rectangular support.
- **Legs**: Four legs to support the base.
- **Braces**: Braces for stability between the legs and at the back.
We'll begin by defining the main structures for the base, back support, legs, and braces.
### Step 1: Define Main Structures
```python
from AIDL import *
def macbook_chair(
seat_width: float = 12 * inches,
seat_depth: float = 10 * inches,
back_height: float = 14 * inches,
leg_height: float = 6 * inches,
leg_thickness: float = 0.75 * inches,
brace_width: float = 2 * inches
):
"""
Creates a model for a simple MacBook chair with a flat seat, inclined back support
and four legs with braces for stability.
"""
# Main structure of the chair
chair = Solid()
# Define substructures
seat = Solid()
back_support = Solid()
legs = [Solid() for _ in range(4)]
braces = [Solid() for _ in range(4)]
chair.seat = seat
chair.back_support = back_support
chair.legs = legs
chair.braces = braces
# Constraints for positioning and aligning the structures
# 1. Align the seat and back support, set seat size
seat.AddConstraint(seat.bb.width == seat_width)
seat.AddConstraint(seat.bb.height == seat_depth)
seat.AddConstraint(HorizontallySymmetric(seat.bb.left, seat.bb.right))
seat.AddConstraint(VerticallySymmetric(seat.bb.top, seat.bb.bottom))
# 2. Align back support to the seat
back_support.AddConstraint(back_support.bb.width == seat_width)
back_support.AddConstraint(back_support.bb.height == back_height)
chair.AddConstraint(Coincident(back_support.bb.bottom, seat.bb.top))
chair.AddConstraint(HorizontallySymmetric(back_support.bb.horizontal_center, seat.bb.horizontal_center))
# 3. Set constraints for legs; positions relative to the seat
for leg in legs:
leg.AddConstraint(leg.bb.height == leg_height)
leg.AddConstraint(leg.bb.width == leg_thickness)
# Position legs at corners:
legs[0].AddConstraint(Coincident(legs[0].bb.top, seat.bb.bottom_left))
legs[1].AddConstraint(Coincident(legs[1].bb.top, seat.bb.bottom_right))
legs[2].AddConstraint(Coincident(legs[2].bb.top, seat.bb.top_left, shift=(0, -back_height)))
legs[3].AddConstraint(Coincident(legs[3].bb.top,seat.bb.top_right, shift=(0, -back_height)))
# Constraints for braces
for brace, i in zip(braces, range(4)):
brace.AddConstraint(brace.bb.width == brace_width)
brace.AddConstraint(brace.bb.height == leg_thickness/2)
if i < 2: # Attach to front legs
brace.AddConstraint(Coincident(brace.bb.right, legs[i].bb.left, shift=(0, -leg_height/2)))
brace.AddConstraint(Coincident(brace.bb.left, legs[i+2].bb.right, shift=(0, back_height-leg_height/2)))
else: # Attach to back legs
brace.AddConstraint(Coincident(brace.bb.right, legs[i].bb.left, shift=(0, back_height-leg_height/2)))
brace.AddConstraint(Coincident(brace.bb.left, legs[(i+2)%4].bb.right, shift=(0, -leg_height/2)))
# Geometry Definition
# Seat Geometry
seat.base = Rectangle((0,0), seat_width, seat_depth)
# Back Support Geometry
back_support.support = Rectangle((0,0), seat_width, back_height)
# Legs Geometry
for leg in legs:
leg.geometry = Rectangle((0,0), leg_thickness, leg_height)
# Braces Geometry
for brace in braces:
brace.geometry = Rectangle((0, 0), brace_width, leg_thickness/2)
return chair
with AIDL_2D:
model = macbook_chair()
print(model.Solve())
model.Render()
```
### Explanation:
1. **Structure Definition**:
- `chair` is the root structure.
- `seat`, `back_support`, `legs`, and `braces` are substructures.
2. **Constraints**:
- Ensure proper alignment and dimensions for each part of the chair.
- Legs are positioned relative to the seat's corners.
3. **Geometry**:
- Define the parts' shape as rectangles with appropriate dimensions.
This program defines the hierarchical structure, aligns the parts using constraints, defines the geometry of each part, solves the model, and renders it. Let me know if you need any modifications or additional features!
Traceback (most recent call last):
File "/net/projects/ranalab/jz/aidl/AIDL/generation/backend.py", line 21, in dumbrun
exec(code, env)
File "", line 89, in
File "", line 37, in macbook_chair
File "/net/projects/ranalab/jz/aidl/AIDL/constraints.py", line 735, in __init__
raise ConstraintInputTypeError(self, [p1, p2])
AIDL.feedback.ConstraintInputTypeError: Bad Constraint Initialization for constrain of type
Initialized Here:
{}
Arguments Given of Type(s):
[, ]
Constraint Documentation:
Constraint two points to be horizontally symmetric
(symmetric across the v-axis of the Structure this
constraint is on.)
Calling Convention(s):
HorizontallySymmetric(A: Point, B: Point)
It seems there's an issue with the `HorizontallySymmetric` constraint. The error message indicates that this constraint is being initialized with incompatible argument types. The `HorizontallySymmetric` constraint expects two `Point` objects.
Let's correct the initialization of the `HorizontallySymmetric` constraints by explicitly referring to the appropriate `Point` instances from the geometry objects.
### Correct the Argument Types for Constraints
I will also adjust some of the other constraints to ensure they properly reference the correct properties. Let's go through it step by step:
1. **Correct the constraints for aligning the seat and back support**.
2. **Ensure proper placement and orientation of the legs**.
3. **Position the braces correctly**.
Here's the revised version of the code:
```python
from AIDL import *
def macbook_chair(
seat_width: float = 12 * inches,
seat_depth: float = 10 * inches,
back_height: float = 14 * inches,
leg_height: float = 6 * inches,
leg_thickness: float = 0.75 * inches,
brace_width: float = 2 * inches
):
"""
Creates a model for a simple MacBook chair with a flat seat, inclined back support
and four legs with braces for stability.
"""
# Main structure of the chair
chair = Solid()
# Define substructures
seat = Solid()
back_support = Solid()
legs = [Solid() for _ in range(4)]
braces = [Solid() for _ in range(4)]
chair.seat = seat
chair.back_support = back_support
chair.legs = legs
chair.braces = braces
# Constraints for positioning and aligning the structures
# 1. Align the seat and back support, set seat size
seat.AddConstraint(seat.bb.width == seat_width)
seat.AddConstraint(seat.bb.height == seat_depth)
# Define the seat geometry
seat.base = Rectangle((0, 0), seat_width, seat_depth)
# Ensure symmetrical placement of the seat
chair.AddConstraint(Horizontal(seat.base.center, seat.base.bottom))
# 2. Align back support to the seat
back_support.AddConstraint(back_support.bb.width == seat_width)
back_support.AddConstraint(back_support.bb.height == back_height)
# Define the back support geometry
back_support.support = Rectangle((0, 0), seat_width, back_height)
# Align back support with the seat
chair.AddConstraint(Coincident(back_support.support.bottom, seat.base.top))
chair.AddConstraint(Horizontal(back_support.support.center, seat.base.center))
# 3. Set constraints for legs; positions relative to the seat
for leg in legs:
leg.AddConstraint(leg.bb.height == leg_height)
leg.AddConstraint(leg.bb.width == leg_thickness)
# Define the leg geometry
leg.geometry = Rectangle((0, 0), leg_thickness, leg_height)
# Position legs at corners of the seat
chair.AddConstraint(Coincident(legs[0].geometry.top, seat.base.bottom_left))
chair.AddConstraint(Coincident(legs[1].geometry.top, seat.base.bottom_right))
chair.AddConstraint(Coincident(legs[2].geometry.top, seat.base.top_left))
chair.AddConstraint(Coincident(legs[3].geometry.top, seat.base.top_right))
# Constraints for braces
for brace in braces:
brace.AddConstraint(brace.bb.width == brace_width)
brace.AddConstraint(brace.bb.height == leg_thickness / 2)
# Define the brace geometry
brace.geometry = Rectangle((0, 0), brace_width, leg_thickness / 2)
# Position braces for stability
chair.AddConstraint(Coincident(braces[0].geometry.left, legs[0].geometry.right))
chair.AddConstraint(Coincident(braces[0].geometry.right, legs[1].geometry.left))
chair.AddConstraint(Coincident(braces[1].geometry.left, legs[2].geometry.right))
chair.AddConstraint(Coincident(braces[1].geometry.right, legs[3].geometry.left))
chair.AddConstraint(Coincident(braces[2].geometry.top, legs[0].geometry.bottom))
chair.AddConstraint(Coincident(braces[2].geometry.bottom, legs[2].geometry.top))
chair.AddConstraint(Coincident(braces[3].geometry.top, legs[1].geometry.bottom))
chair.AddConstraint(Coincident(braces[3].geometry.bottom, legs[3].geometry.top))
return chair
with AIDL_2D:
model = macbook_chair()
print(model.Solve())
model.Render()
```
### Explanation:
1. **Structure Definition**:
- `chair` is the root structure.
- `seat`, `back_support`, `legs`, and `braces` are substructures.
2. **Constraints**:
- Ensure proper alignment and dimensions for each part of the chair.
- Legs are positioned relative to the seat's corners.
- The horizontal symmetry constraints are correctly applied to appropriate points.
3. **Geometry**:
- Define the parts' shape as rectangles with appropriate dimensions.
This should address the issue and ensure proper initialization of constraints with valid argument types. Let me know if you need any further adjustments!
Traceback (most recent call last):
File "/net/projects/ranalab/jz/aidl/AIDL/constraints.py", line 879, in __init__
dispatch(args, kwargs, [line, points])
File "/net/projects/ranalab/jz/aidl/AIDL/dispatch.py", line 42, in dispatch
given_signature = format_called_signature(args, kwargs)
File "/net/projects/ranalab/jz/aidl/AIDL/dispatch.py", line 28, in format_called_signature
return '(' + ', '.join([format_called_signature(arg) if isinstance(arg, Iterable) else str(type(arg).__name__) for arg in all_args]) + ')'
File "/net/projects/ranalab/jz/aidl/AIDL/dispatch.py", line 28, in
return '(' + ', '.join([format_called_signature(arg) if isinstance(arg, Iterable) else str(type(arg).__name__) for arg in all_args]) + ')'
TypeError: format_called_signature() missing 1 required positional argument: 'kwargs'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/net/projects/ranalab/jz/aidl/AIDL/generation/backend.py", line 21, in dumbrun
exec(code, env)
File "", line 90, in
File "", line 41, in macbook_chair
File "/net/projects/ranalab/jz/aidl/AIDL/constraints.py", line 881, in __init__
raise ConstraintInputTypeError(self, args)
AIDL.feedback.ConstraintInputTypeError: Bad Constraint Initialization for constrain of type
Initialized Here:
{}
Arguments Given of Type(s):
(, )
Constraint Documentation:
Constrain a line (or point pair) to be horizontal.
Calling Convention(s):
Horizontal(line: Line)
line is horizontal (endpoints have same v coordinate in Constraint's Structure's frame)
Horizontal(point1: Point, point2: Point)
point1 and point2 are on the same horizontal line (have the same v coordinate in the Constraint's Structure's frame)
It looks like there's a mistake where I used the `Horizontal` constraint with incompatible arguments. The `Horizontal` constraint should either take a single `Line` or two `Point` objects, not a `Point` and a `Line`.
Let's correct this and make the necessary adjustments:
1. **Use the `HorizontallySymmetric` constraint appropriately**.
2. **Correctly apply the `Horizontal` and `Coincident` constraints**.
Here's the revised version of the code:
```python
from AIDL import *
def macbook_chair(
seat_width: float = 12 * inches,
seat_depth: float = 10 * inches,
back_height: float = 14 * inches,
leg_height: float = 6 * inches,
leg_thickness: float = 0.75 * inches,
brace_width: float = 2 * inches
):
"""
Creates a model for a simple MacBook chair with a flat seat, inclined back support
and four legs with braces for stability.
"""
# Main structure of the chair
chair = Solid()
# Define substructures
seat = Solid()
back_support = Solid()
legs = [Solid() for _ in range(4)]
braces = [Solid() for _ in range(4)]
chair.seat = seat
chair.back_support = back_support
chair.legs = legs
chair.braces = braces
# Constraints for positioning and aligning the structures
# 1. Align the seat and back support, set seat size
seat.AddConstraint(seat.bb.width == seat_width)
seat.AddConstraint(seat.bb.height == seat_depth)
# Define the seat geometry
seat.base = Rectangle((0, 0), seat_width, seat_depth)
# Ensure symmetrical placement of the seat
seat.AddConstraint(HorizontallySymmetric(seat.base.top_left, seat.base.top_right))
# 2. Align back support to the seat
back_support.AddConstraint(back_support.bb.width == seat_width)
back_support.AddConstraint(back_support.bb.height == back_height)
# Define the back support geometry
back_support.support = Rectangle((0, 0), seat_width, back_height)
# Align back support with the seat
chair.AddConstraint(Coincident(back_support.support.bottom_center, seat.base.top_center))
# 3. Set constraints for legs; positions relative to the seat
for leg in legs:
leg.AddConstraint(leg.bb.height == leg_height)
leg.AddConstraint(leg.bb.width == leg_thickness)
# Define the leg geometry
leg.geometry = Rectangle((0, 0), leg_thickness, leg_height)
# Position legs at corners of the seat
chair.AddConstraint(Coincident(legs[0].geometry.top_center, seat.base.bottom_left))
chair.AddConstraint(Coincident(legs[1].geometry.top_center, seat.base.bottom_right))
chair.AddConstraint(Coincident(legs[2].geometry.top_center, seat.base.top_left))
chair.AddConstraint(Coincident(legs[3].geometry.top_center, seat.base.top_right))
# Constraints for braces
for brace in braces:
brace.AddConstraint(brace.bb.width == brace_width)
brace.AddConstraint(brace.bb.height == leg_thickness / 2)
# Define the brace geometry
brace.geometry = Rectangle((0, 0), brace_width, leg_thickness / 2)
# Position braces for stability
chair.AddConstraint(Coincident(braces[0].geometry.bottom_center, legs[0].geometry.bottom_center))
chair.AddConstraint(Coincident(braces[1].geometry.bottom_center, legs[1].geometry.bottom_center))
chair.AddConstraint(Coincident(braces[2].geometry.bottom_center, legs[2].geometry.bottom_center))
chair.AddConstraint(Coincident(braces[3].geometry.bottom_center, legs[3].geometry.bottom_center))
return chair
with AIDL_2D:
model = macbook_chair()
print(model.Solve())
model.Render()
```
### Explanation:
1. **Structure Definition**:
- `chair` is the root structure.
- `seat`, `back_support`, `legs`, and `braces` are substructures.
2. **Constraints**:
- Ensure proper alignment and dimensions for each part of the chair.
- Legs are positioned relative to the seat's corners.
- Use the `HorizontallySymmetric` constraint correctly to ensure symmetrical placement.
- Correctly apply the `Coincident` constraint.
3. **Geometry**:
- Define the parts' shape as rectangles with appropriate dimensions.
This revised version should resolve the constraint initialization issues and align the geometry correctly. Let me know if you encounter any further issues or need additional modifications!
Traceback (most recent call last):
File "/net/projects/ranalab/jz/aidl/AIDL/generation/backend.py", line 21, in dumbrun
exec(code, env)
File "", line 85, in
File "", line 51, in macbook_chair
AttributeError: 'Rectangle' object has no attribute 'bottom_center'. Did you mean: 'bottom_left'?
It looks like there was an incorrect reference to `bottom_center`, which is not a valid attribute for `Rectangle`. The valid attributes for points are `bottom_left`, `bottom_right`, `top_left`, `top_right`, and `center`.
Let's correct the references and ensure that we use valid point references. Here’s the revised version:
```python
from AIDL import *
def macbook_chair(
seat_width: float = 12 * inches,
seat_depth: float = 10 * inches,
back_height: float = 14 * inches,
leg_height: float = 6 * inches,
leg_thickness: float = 0.75 * inches,
brace_width: float = 2 * inches
):
"""
Creates a model for a simple MacBook chair with a flat seat, inclined back support
and four legs with braces for stability.
"""
# Main structure of the chair
chair = Solid()
# Define substructures
seat = Solid()
back_support = Solid()
legs = [Solid() for _ in range(4)]
braces = [Solid() for _ in range(4)]
chair.seat = seat
chair.back_support = back_support
chair.legs = legs
chair.braces = braces
# Constraints for positioning and aligning the structures
# 1. Align the seat and back support, set seat size
seat.AddConstraint(seat.bb.width == seat_width)
seat.AddConstraint(seat.bb.height == seat_depth)
# Define the seat geometry
seat.base = Rectangle((0, 0), seat_width, seat_depth)
# Ensure symmetrical placement of the seat
seat.AddConstraint(HorizontallySymmetric(seat.base.bottom_left, seat.base.bottom_right))
# 2. Align back support to the seat
back_support.AddConstraint(back_support.bb.width == seat_width)
back_support.AddConstraint(back_support.bb.height == back_height)
# Define the back support geometry
back_support.support = Rectangle((0, 0), seat_width, back_height)
# Align back support with the seat
chair.AddConstraint(Coincident(back_support.support.bottom_left, seat.base.top_left))
chair.AddConstraint(Coincident(back_support.support.bottom_right, seat.base.top_right))
# 3. Set constraints for legs; positions relative to the seat
for leg in legs:
leg.AddConstraint(leg.bb.height == leg_height)
leg.AddConstraint(leg.bb.width == leg_thickness)
# Define the leg geometry
leg.geometry = Rectangle((0, 0), leg_thickness, leg_height)
# Position legs at corners of the seat
chair.AddConstraint(Coincident(legs[0].geometry.top_left, seat.base.bottom_left))
chair.AddConstraint(Coincident(legs[1].geometry.top_right, seat.base.bottom_right))
chair.AddConstraint(Coincident(legs[2].geometry.top_left, seat.base.top_left))
chair.AddConstraint(Coincident(legs[3].geometry.top_right, seat.base.top_right))
# Constraints for braces
for brace in braces:
brace.AddConstraint(brace.bb.width == brace_width)
brace.AddConstraint(brace.bb.height == leg_thickness / 2)
# Define the brace geometry
brace.geometry = Rectangle((0, 0), brace_width, leg_thickness / 2)
# Position braces for stability
chair.AddConstraint(Coincident(braces[0].geometry.left_center, legs[0].geometry.right_center))
chair.AddConstraint(Coincident(braces[1].geometry.left_center, legs[1].geometry.right_center))
chair.AddConstraint(Coincident(braces[2].geometry.left_center, legs[2].geometry.right_center))
chair.AddConstraint(Coincident(braces[3].geometry.left_center, legs[3].geometry.right_center))
return chair
with AIDL_2D:
model = macbook_chair()
print(model.Solve())
model.Render()
```
### Explanation:
1. **Structure Definition**:
- `chair` is the root structure.
- `seat`, `back_support`, `legs`, and `braces` are substructures.
2. **Constraints**:
- Ensure proper alignment and dimensions for each part of the chair.
- Legs are positioned relative to the seat's corners.
- Use the `HorizontallySymmetric` constraint correctly to ensure symmetrical placement.
- Correctly apply the `Coincident` constraint.
3. **Geometry**:
- Define the parts' shape as rectangles with appropriate dimensions.
I've corrected the attribute references to use valid point names and ensured that we are making valid constraints and positioning. This should address the errors and align the geometry correctly. Let me know if there are any further issues or if you need additional modifications!
Traceback (most recent call last):
File "/net/projects/ranalab/jz/aidl/AIDL/generation/backend.py", line 21, in dumbrun
exec(code, env)
File "", line 86, in
File "", line 77, in macbook_chair
AttributeError: 'Rectangle' object has no attribute 'left_center'
It appears there was a mistake with the attribute names again. The `Rectangle` class does not have `left_center`, `right_center`, etc. Instead, let's use the midpoint references of the edges (like `left.midpoint`, `right.midpoint`).
Here's the revised version of the MacBook chair code where I will use valid attributes from the `Rectangle` primitive:
```python
from AIDL import *
def macbook_chair(
seat_width: float = 12 * inches,
seat_depth: float = 10 * inches,
back_height: float = 14 * inches,
leg_height: float = 6 * inches,
leg_thickness: float = 0.75 * inches,
brace_width: float = 2 * inches
):
"""
Creates a model for a simple MacBook chair with a flat seat, inclined back support
and four legs with braces for stability.
"""
# Main structure of the chair
chair = Solid()
# Define substructures
seat = Solid()
back_support = Solid()
legs = [Solid() for _ in range(4)]
braces = [Solid() for _ in range(4)]
chair.seat = seat
chair.back_support = back_support
chair.legs = legs
chair.braces = braces
# Constraints for positioning and aligning the structures
# 1. Align the seat and back support, set seat size
seat.AddConstraint(seat.bb.width == seat_width)
seat.AddConstraint(seat.bb.height == seat_depth)
# Define the seat geometry
seat.base = Rectangle((0, 0), seat_width, seat_depth)
# Ensure symmetrical placement of the seat
seat.AddConstraint(HorizontallySymmetric(seat.base.bottom_left, seat.base.bottom_right))
# 2. Align back support to the seat
back_support.AddConstraint(back_support.bb.width == seat_width)
back_support.AddConstraint(back_support.bb.height == back_height)
# Define the back support geometry
back_support.support = Rectangle((0, 0), seat_width, back_height)
# Align back support with the seat
chair.AddConstraint(Coincident(back_support.support.bottom_left, seat.base.top_left))
chair.AddConstraint(Coincident(back_support.support.bottom_right, seat.base.top_right))
# 3. Set constraints for legs; positions relative to the seat
for leg in legs:
leg.AddConstraint(leg.bb.height == leg_height)
leg.AddConstraint(leg.bb.width == leg_thickness)
# Define the leg geometry
leg.geometry = Rectangle((0, 0), leg_thickness, leg_height)
# Position legs at corners of the seat
chair.AddConstraint(Coincident(legs[0].geometry.top_left, seat.base.bottom_left))
chair.AddConstraint(Coincident(legs[1].geometry.top_right, seat.base.bottom_right))
chair.AddConstraint(Coincident(legs[2].geometry.top_left, seat.base.top_left))
chair.AddConstraint(Coincident(legs[3].geometry.top_right, seat.base.top_right))
# Constraints for braces
for brace in braces:
brace.AddConstraint(brace.bb.width == brace_width)
brace.AddConstraint(brace.bb.height == leg_thickness / 2)
# Define the brace geometry
brace.geometry = Rectangle((0, 0), brace_width, leg_thickness / 2)
# Position braces for stability using valid midpoint attributes
chair.AddConstraint(Coincident(braces[0].geometry.left.midpoint, legs[0].geometry.right.midpoint))
chair.AddConstraint(Coincident(braces[1].geometry.left.midpoint, legs[1].geometry.right.midpoint))
chair.AddConstraint(Coincident(braces[2].geometry.left.midpoint, legs[2].geometry.right.midpoint))
chair.AddConstraint(Coincident(braces[3].geometry.left.midpoint, legs[3].geometry.right.midpoint))
return chair
with AIDL_2D:
model = macbook_chair()
print(model.Solve())
model.Render()
```
### Explanation:
1. **Structure Definition**:
- `chair` is the root structure.
- `seat`, `back_support`, `legs`, and `braces` are substructures.
2. **Constraints**:
- Ensure proper alignment and dimensions for each part of the chair.
- Legs are positioned relative to the seat's corners.
- Use the `HorizontallySymmetric` constraint correctly to ensure symmetrical placement.
- Correctly apply the `Coincident` constraint using the proper midpoint attributes.
3. **Geometry**:
- Define the parts' shape as rectangles with appropriate dimensions.
By fixing the attribute references to valid points such as `midpoint` of edges, this revised version should resolve the issues and place the geometry correctly. Let me know if you encounter any further issues or need additional modifications!
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