E-PORTFOLIO BRIEF Create a Mahara e-portfolio based on the template Revit and Sketching E-Portfolio. Orthographic 6 Introduction Orthographic projections are used to represent 3D components on a flat surface in a

2D form. The two main types are First Angle Projection and Third Angle Projection (TAP). We will focus on TAP. Perspective Introduction Perspective drawings represent most faithfully the way spatial configurations look in real life. They communicate overhead or suspended forms particularly well, and sections through structures that need to be seen spatially within an enclosure. Perspective grids can be con- structed simply and be drawn over again and again on tracing paper at any scale in presentation drawings or quick sketches. Isometric Introduction Isometric drawing is one of the most popular engineering drawing methods because it lets you see the top, front and side of what you are drawing. Its distortion is gentle, unlike perspec- tive, and it gives you a crisp model of what you have in your minds eye. Oblique Introduction In an elevation oblique drawing the frontal plane is an orthographic elevation and the side planes are drawn at 30° 45° or 60°. If a measured drawing is being constructed with 30° side planes, it's lengths are not fore- shortened. If 45° or 60° side planes are used, all lengths are halved to minimise the optical distortion.