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A pair of bookends, each of which incorporates a globe, and some books are shown in the 3D graphic below - Leaving Cert DCG - Question A-2 - 2010
Question A-2
A pair of bookends, each of which incorporates a globe, and some books are shown in the 3D graphic below. A set of isometric axes is shown on the right and the elev... show full transcript
Worked Solution & Example Answer:A pair of bookends, each of which incorporates a globe, and some books are shown in the 3D graphic below - Leaving Cert DCG - Question A-2 - 2010
Step 1
Projections from plan and elevation
Answer
To begin the axonometric projection, establish the isometric axes (X, Y, Z) based on the provided elevation and plan views. The front face of the bookend will project along the X-axis, while the depth of the bookend extends along the Z-axis. Careful attention should be given to maintaining the correct angles for isometric representation, typically at 30 degrees from the horizontal.
Step 2
Determining points incl. sphere centre (11 x 1)
Answer
Identify key points for projection, including the corners of the bookend and the center of the globe for accurate positioning. The dimensions should follow the specified measurements from the elevation and plan, converting these dimensions into the isometric view. The center of the globe must be marked between the two bookends, requiring the radius measurements taken from the plan.
Step 3
Step 4
Completion of axonometric view
Answer
Finalize the drawing by enhancing lines and adding shading to create dimension and depth. Include details such as the texture of the books, the geography on the globe, and any other distinguishing characteristics of the bookends. Review the overall proportions and angles to ensure the axonometric projection accurately represents the 3D object as described.