2.1 Isometric sketching
In this activity, you will develop your isometric sketching skills by first drawing isometric views of objects that are already given in an isometric orientation. You will apply your sketching skills in later exercises to sketch orthographic views of objects that are not given in isometric orientation and to represent your ideas and designs
|
![]()
|
Conclusion
1. What are the advantages and disadvantages to using an isometric pictorial compared to using an oblique pictorial in technical drawings?
1. What are the advantages and disadvantages to using an isometric pictorial compared to using an oblique pictorial in technical drawings?
- Oblique allows you to see the front face of an object. Hidden lines are seen better. Isometric shows a very good 3D view. Hidden lines aren't shown very well.
- Isometric sketches show depth and appear to be 3D versus 2D sketches that show no height or depth.
- Designers use shading to show depth and give the sketch a sense of realism.
2.2 Perspective drawings
In this activity, you will practice your sketching skills by generating perspective views based on provided isometric views of objects. You will also apply your skills by creating one-point and two-point perspective of other imagined or real objects that you choose.
|
![]()
|
Conclusion
1. What is a vanishing point?
1. What is a vanishing point?
- It is located on the horizon line. A series of lines are drawn from distinctive points on the object to the vanishing point, outlining the object being constructed. It's where your eyes are led to.
- One-point is the simplest. It has an awkward shape to it. Two-point is the most commonly used. It is used to better show the edges and depth of a design. Three-point gives the viewer more of a birds eye view.
- Perspective drawings are easier on the eyes. It is easier to look at. An isometric drawing doesn't have vanishing points. I think of it as a free hand perspective sketch. A drawing looks better when it's in perspective. You should use a perspective drawing when you're showing off your sketch. It's more pleasing for viewers and yourself.
2.3 Glass box
In this activity you will design and build a box from a flat sheet of transparency film. You will then use your glass box to help you sketch orthogonal projections of an object and create multi-view drawings.
|
![]()
|
Conclusion
1. How do you determine the orientation of orthogonal projections in a multi-view drawing?
1. How do you determine the orientation of orthogonal projections in a multi-view drawing?
- It is determined by the drawing is positioned. (Front, top, side)
- They are the same views as the dimensions.
- The construction lines and points allow you to view the object better.
2.4 Multi-view sketching
Knowing how to sketch and interpret multi-views is an important skill for any engineer. In this activity, you will develop your ability to see and sketch objects as a series of related two-dimensional views. Understanding and using the different line conventions, discussed earlier in this lesson, will help when creating these views.
|
![]()
|
Conclusion
1. What is the purpose of construction lines? Object lines?
1. What is the purpose of construction lines? Object lines?
- Construction lines guide you through the drawing and object lines are thick lines that show the final sketch.
- Hidden lines represent edges that can't be seen from that view. Center lines define the center of arcs, circles, and other symmetrical parts.
- It is an oblique pictorial because it show the true height, width, and length of the object and it doesn't matter the angle.
- It is an isometric pictorial because all three drawing axes form equal angles of 120 degrees with the plane of projection.
- Dimensions are easier to see in multi-view sketches.
2.5 sketching practice
Sketching is a valuable engineering skill that needs to be developed through practice. Through practice you will be able to communicate your vision of your idea. In this activity you will apply the skills that you learned earlier in this lesson to more complex objects.
|
![]()
|
Conclusion
1. What is a technical sketch? What is an artistic sketch? How are the two similar and how are they different?
1. What is a technical sketch? What is an artistic sketch? How are the two similar and how are they different?
- A technical sketch shows dimensions and line conventions. Artistic sketches are free-hand and are more flowing in my opinion.
- If i ever take an art class it'll help me a lot. Geometry would've been a lot easier with this class.
- I dream of becoming an architectural engineer so sketching will be a big part of college.
- I would honestly show them all these powerpoints and videos because sketching is actually more complicated than i thought.