This technical drawing session focused on drawing a specific object from different view points. When the position of an object is changed what we are able to see of the object changes, this is a style of drawing which us as designers must embark up on and get used to. When viewpoints change certain aspects of the object will appear smaller to us as they are further away, to array this within our drawing we must change the dimensions and orientation of that object in order for our drawing to appear convincing.
In order to create a successful perspective drawing we must first create a vanish point, this can be a simple cross in the centre of our page with faint lines going to each corner. Parts of the drawing drawn closest to the centre point will appear to be further away, and parts of the drawing drawn further away from the vanish point will appear closer to us, as shown above.
one point perspectives
An alternative way of expressing perspective is if we just want a one point perspective, which would be in a situation where we are facing the object straight on. We start by drawing a horizontal line across the centre of the page which will depict the horizon of the drawing, this line determines how far the viewer can see based on the position of the viewer in relation to the object. Then we draw a vanishing point, most often this would be in the centre of the page on our horizontal line as the viewer is usually directly facing the object, however if we were to place the vanishing point to the left of the horizontal line, then it will appear as though the viewers point of view is coming from the right of the object. The vanishing point to, can be above or below the horizontal line depending on the viewers positioning.
Following this, we would then sketch our main objects bearing in mind the vanishing point and horizontal line, making any objects closest to the vanishing point, smaller, and any objects coming towards us, larger. When we draw and then further understand how this drawing technique works, it is then that we begin to understand perspective drawing.
Two point perspectives
Understanding two point perspectives is useful when the corners of an object are facing the viewer, this is perfect when drawing isometric objects.
Firstly, the designer must determine the horizon within their drawing, this will depend of the position of the object in relation to the viewer. Once we have drawn our horizon we then draw a vertical line straight down the centre to mark where the middle of our drawing is, furthering this then determine where the viewpoint is, which will be where the viewers eye level is.
Along the horizontal line on each side of the vertical line, draw two vanishing points, from both of these points now draw three extending perpendicular lines all coming from the same angle.
From this grid we can the sketch out drawings respecting the guides given from the lines. After carrying out this technique of drawing we will then see a perspective and object being seen from a certain point of view will be convincing.
All images (Fig 1 – (Fig 6) Point perspectives, 01.11.15 http://www.wikihow.com/Draw-Perspective