Week 2: Computer-Aided Design Assignment
- Model raster, vector, 2D, 3D, render, animate, simulate
- Evaluate and select 2D and 3D software
- Demonstrate and describe processes used in modeling with 2D and 3D software
- Demonstrate image and video compression techniques
1. Model vector in Inkscape
Step 1: Import the Image
Open Inkscape and go to File > Import to select the image you want to vectorize.
Step 2: Select the Image
Click on the imported image to ensure that it is active.
Step 3: Open the Bitmap Trace Tool
Go to Path > Trace Bitmap... (or use the shortcut Shift+Alt+B).
Step 4: Configure the Vectorization Parameters
In the dialog box that appears, you will find several options:
- Brightness Threshold: Ideal for black-and-white or high-contrast images. Adjust the value to determine which parts are converted into vector.
- Edge Detection: Used to highlight the contours.
- Color Detection: Useful if you want to maintain distinct color areas.
Enable the Live Preview option to see how the vectorization will look with the selected parameters.
Step 5: Perform the Trace
Once you are satisfied with the preview and the parameters are adjusted, click OK to generate the vector. The trace will overlay the original image.
Step 6: Adjust and Edit the Vector
Select the vector and, if necessary, use the Node Tool to refine contours, remove unnecessary nodes, or smooth out lines. You can move the vector aside to compare it with the original image and ensure the result is as expected.
Step 7: Finalize and Save Your Work
If you no longer need the original image, delete or hide it. Save the result in SVG or another vector format by going to File > Save As....
2. Model Raster in Photoshop
Step 1: Open Photoshop and Select the Layer
Open Adobe Photoshop and select the layer you want to rasterize from the Layers panel.
Step 2: Right-click on the Layer
Right-click on the selected layer in the Layers panel. A menu will appear with different options.
Step 3: Choose "Rasterize Layer"
From the context menu, click on "Rasterize Layer" (or "Rasterize Type" if it's a text layer).
Step 4: Edit the Rasterized Object
Now, the object is no longer a vector but a raster image, meaning it consists of pixels. You can apply brushes, filters, and pixel-based effects.
That's it! You have successfully rasterized your object in Photoshop.
3. Model 2D in AutoCAD
Step 1: Workspace Setup
Open AutoCAD and select the Drafting and Annotation workspace.
Ensure the Grid (F7) and Snap to Grid (F9) options are enabled for precise drawing.
Work in millimeters or inches depending on your project requirements.
Step 2: Drawing the Mechanism's Bars
Draw the Base of the Mechanism
Use the Line tool (LINE or L) to draw the
fixed base
of the mechanism.
4. Model 3D in Creo Parametric
Step 1: Conceptualization and Sketching
Before starting in Creo, initial sketches and key mechanism components were defined, including:
- Lever and articulation system.
- Support structure for stability.
- Optimal material selection for weight and strength.
Step 2: Creating 3D Parts in Creo
Each component of the mechanism was individually modeled using Creo Parametric:
- Base Structure: Created using extrusion.
- Bars and Joints: Modeled with revolution and parametric sketches.
- Fastening Elements: Assembled using constraint-based positioning.
Step 3: Assembling the Mechanism
The assembly process involved:
- Rotational joints for movement.
- Alignment and coincidence constraints for precise connections.
- Interference analysis to prevent collisions.
Week 2: Conclusion
This week’s activities provided a comprehensive understanding of computer-aided design, including raster and vector modeling, 2D drafting in AutoCAD, and 3D modeling in Creo Parametric. Each step reinforced essential skills in digital modeling, from conceptualization to optimization. The hands-on experience gained through modeling, rendering, and simulating mechanical systems contributed to developing a structured workflow for future projects. By applying different CAD techniques, we achieved a deeper insight into the design process, ensuring accuracy, efficiency, and functionality in mechanical and architectural models.
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