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The 3D graphic on the right shows a bus shelter - Leaving Cert DCG - Question B-1 - 2011
Question B-1
The 3D graphic on the right shows a bus shelter. Fig. B-1 shows the plan and elevation of a model of the bus shelter. (a) Draw the given plan. (b) Make a perspect... show full transcript
Worked Solution & Example Answer:The 3D graphic on the right shows a bus shelter - Leaving Cert DCG - Question B-1 - 2011
Step 1
Plan of Spectator, PP, VP1, and VP2
Answer
To begin, we identify the position of the spectator point, which is 70mm away from corner A. This will determine the position of the perspective projection points PP, VP1, and VP2. Given that the spectator point is placed in front of the bus shelter, we can designate it in a planar view, where it will be represented accordingly in our perspective drawing.
Step 2
Elevation of GL, HL, VP1, and VP2
Answer
Next, we need to establish the ground line (GL) and the height line (HL). The ground line will serve as the base measurement while the height line represents the desired heights of the structure.
For the elevation of VP1 and VP2, it’s important to note that these points should be projected from their respective sections in the plan view. Therefore, we must correctly measure the vertical distances which should correspond accurately to the heights of the bus shelter.
Step 3
Sight Lines from Spectator to Plan
Answer
Once the viewer's position and elevation points have been established, we will draw sight lines from the spectator point to the base plan of the bus shelter. This connectivity is vital for accurate perspective representation. Ensure to draw light construction lines first to adjust and confirm correctness.
Step 4
Perspective of Bottom Edges
Answer
Using the projected points, we will then draft the perspective view of the bottom edges of the bus shelter. This requires connecting the sight lines to the corresponding edges of the lower sections of the shelter base. Each bottom edge should reflect the intended proportions established in the planning stages.
Step 5
Establish Height for Front of Shelter
Answer
Next is to establish the height for the front of the shelter. The height should be drawn based on the horizon line, which is defined as 40mm above the ground line. Careful attention should be paid to the vertical alignment of this height relative to the sight lines previously drawn.
Step 6
Establish Height for Rear of Shelter
Answer
Similarly, we will establish the height for the rear of the shelter. Using the same measurements, we will ensure that the drawing maintains consistency in its elevations while also adhering to the architectural specifications laid out in the plans.
Step 7
Step 8