The Ohio State University: Mansfield Campus

Perspective reading and videos with 7 bullet points

For this assignment there was 10 double page spread article to read, as well as six different videos on drawing in one and two perspective.  I needed to write down seven important points from the reading:

7 bullet points from perspective reading:

  • The “ground line” (GL) is where the picture plane, the surface that perspective is being place on, and the ground plane, the plane on which the observer stands, meet.
  • Parallel perspective is created with one-point perspective.
    • This perspective is constructed with the vanishing point as if a one eyed viewer, with the vanishing point place where they would be looking.
  • Angular perspective is created using two-point perspective
    • It is important to have a logical point of view
    • It must be constructed geometrically correct, without having actual measurements of the real life dimensions.
  • Oblique perspective is created using three-point perspective.
    • All three types of lines, vertical, horizontal, and all connecting lines to those lines
    • This method is used to create dramatic effects due to the dramatic/surprising visual effects.
  • Common mistakes to avoid:
    • Make sure that for:
      • One point, horizontal and vertical lines form 90 degree angles when in direct contact. Vertical lines are 90 degrees in reference to the horizon line, and horizontal lines run parallel to the horizon line.
      • Two point, vertical lines are 90 degrees in reference to the horizon, horizontal and connecting lines must be drawn using the (the appropriate one of the)) two vanish points.
      • Three point, all lines must go to one of the three vanishing points, all vertical lines will go to an vanishing point not located on the horizon line.
    • In freehand drawing:
      • Cubes in angular and cubes in oblique perspective can not have an angle less that 90 degrees between the its faces.
      • The lines must be consistent (they must all return to the vanishing point)
    • Stairs in perspective:
      • Stairs can be imagined as a series of blocks/prisms
      • In parallel:
        • A line is drawn from the width of the lowest step
        • The subdivision of height is placed on one of the side edges of the image
        • The subdivisions then are extended towards the vanishing point
        • Then extending off of this diagonal line extends two horizontal lines a vertical line (off of each subdivision line) *the very bottom stair will have one horizontal line that extends across to create the bottom of the last stair.
      • In angular:
        • Similar to in parallel but now two vanishing points must be considered.
        • Begins with a reference box, draw a box in angular perspective.
        • Mark the height of the steps on the nearest edge of the the reference box.
        • Each of these points recedes to the lateral vanishing point.
        • Drawing a diagonal line that joins the lower vertex of the closest edge with the vanishing point of the slope, the intersections with the vanishing points of the steps is obtained.
        • These intersections show the location of the stairs.