Скачать с ютуб How to Draw using Two Point Perspective in AutoCAD : Draw a building Exterior Step-by-step : part 28 в хорошем качестве

How to Draw using Two Point Perspective in AutoCAD : Draw a building Exterior Step-by-step : part 28

Perspective View Perspective views most closely resemble human vision. Objects appear to recede into the distance, creating a sense of depth and space. For most 3D computer graphics, this is the view used in the final output that the client sees onscreen or on the page. There are three ways to create a perspective view Imagine driving along a very straight open road on a grassy plain. The road, the fences, and the power-poles all diminish toward a single point far ahead of you. That's single-point perspective. Single- or one-point perspective is the simplest method of making objects look three-dimensional. It is often used for interior views or trompe l'oeil (fool the eye) effects. Objects must be placed so that the front sides are parallel to the picture plane, with the side edges receding toward a single point. When we talk about perspective drawing, we usually mean linear perspective. Linear perspective is a geometric method of representing the apparent diminishment of scale as the distance between an object and the viewer increases. Each set of horizontal lines has its own vanishing point. In one-point perspective, the vertical lines that run across the field of view remain parallel, as their vanishing points are at "infinity." The horizontal lines, however, which are perpendicular to the viewer, vanish toward a single point at the center of the image. Two-Point Perspective In two-point perspective, the viewer is positioned so that the objects in the drawing or painting are viewed from one corner. This creates two sets of horizontals which diminish toward vanishing points at the outer edges of the picture plane, leaving only verticals perpendicular. It is slightly more complex, as both the front and back edges and the side edges of an object must diminish toward vanishing points. Two-point perspective is often used when drawing buildings in landscapes. Two-point perspective uses the same method described above. The main difference is that the viewer is looking from one corner rather than head-on. For this reason, you cannot begin the drawing with the building's facade. You must first draw the line that forms the corner of the building, then use one of the vanishing points to complete the facade. Three-Point Perspective In three-point perspective, the viewer is looking up or down so that the verticals also converge on a vanishing point at the top or bottom of the image. This is the most complex form of perspective. Unlike in one-point and two-point perspective, none of the lines in the drawing are perpendicular to the viewer. Instead, each one is drawn in the direction of a certain vanishing point. If you were drawing a building using three-point perspective, you would need to begin with only a single point located on the building, then use the vanishing points to define each side of the structure.