We regularly organize free online course to accompany the woman in the growth of IT technical skills training. These courses focus on a specific technology based on a need or goal. Trainers are volunteers. Do not hesitate to contact us if you want to save the file in our trainers. See more training in french .

Call for Application for Design & Graphic Trainer

Published on 21 February 2015
Hits: 10970

 

This call for applications is to identify volunteers trainers for the online Design and Graphic training in groups of 25 people maximum initiated by Africa IT Women (AIW), in order to provide professional knowledge and skills in graphics & design to enable interested people to become great graphist designers, creative and independent...

Read more: Call for Application for Design & Graphic Trainer
 

JAVA HACKATHONS Series ( Offline, Douala )

Published on 12 February 2015
Hits: 9597

The main objective of this training is to increase the number of women who have the mastery of technology. And above all, to raise the level of those already developing. This is the first free training in a long series. 

Read more: JAVA HACKATHONS Series ( Offline, Douala )
 

graphics & design Training online ( French & English )

Published on 12 February 2015
Hits: 6054

 

Initiated by Africa IT Women (AIW), this training provides professional knowledge and skills in graphics & design to enable interested people to become great graphist designers, creative and independent. This training will help participants to Produce logos, brochures, flyers, stickers and posters, Realize advertising, Build or create projects using technology to the forefront of design as the websites, 2D animation, web banners conception and more.

Read more: graphics & design Training online ( French & English )
 

AIW 3-1 figures in space - Inclined plane (Eng)

Published on 15 May 2015
Hits: 7355

 

 

Item Environment installation / Drawing / conception
Course Perspective
Chapter Application - Inclined plan

 

 It easy to create simple figures in perspective but when it comes to more complex figures the secret is to first built simple figures. Let's see the inclined plane case.

Perspective funamentals must be kept in mind in order to determined the horizon line and the different vanishing points.

In perspective each object can be built according to one, two or three vanishing point. One vanishing point per element can be used following the element direction and the direction of the element parallels lines. the more vanishing point is used to represent an object the more deformed that object will appear.
Always remind yourself the vanishing point is an imaginery point create to represent an optical phenomenon which unables the parallels lines to be join at the horizon.

PlaninclineEng

Let's add to fundametals the perspective center:

How to determined a pespective center of a rectangle; draw the two diagonals, then when we extend the central intersection to the vanishing points.

 

centrePEng

Example

Drawing a house in perspective with two vanishing point.

Pour commencer il faut poser la base de cette forme en traçant un rectangle en tirant les lignes de fuites des deux paires de parallèles de la figure

Planincline1eng

Then draw the rectangle diagonals, to draw the middle of the futur 'roof' edges  those diagonals will be helpful.

Planincline2Eng

Then draw the vanishing line that passes by the diagonals intersection previously draw. The vanishing line unable us to find the middle of the edges in perspective: the perspective center.

Planincline3Eng

Now, draw the line which will unable to put the roof peak (the red line). Being in perspective with two vanishing point, the red line is perpendicular to to the horizon line.

Planincline4Eng

Draw a vanishing line from the top of the red line until the first vanishing point. This will define the top edge of the figure.

Planincline5Eng

Now the second top can be drawn (second perpendicular red line):

Planincline6Eng

Now it just to finish the figure by drawing the missing lines. The house roof will appear.

planincline7Eng

Once the construction lines erased, we have the house roof with its inclined planes in perspective with two vanishing points.

planincline8Eng

Inclined plane in perspective with three vanishing points:

Wih the same example, the house roof, start directly with the rectangle realized in perspective with diagonals and the vanishing lines allowing the drawing of middles of the future figure edges. Add the third vanishing point.

planincline9Eng

drag the line defining the top of the figure closer to us determined in relation to the third vanishing point, the perpendicular line to th horizon line is useless here.

planincline10Eng

Draw the vanishing line materializing the roof ridge. planincline11Eng

Draw the second line determined in relation with the third vanishng point; to defined the second roof peak.

planincline12Eng

Draw last lines to define the final figure.

planincline13Eng

The figure with inclined planes is clearly appearing.

planincline14Eng

Once the construction lines are erased. the figure with inclined planes drawn in perspective with three vanishing point is visible

planincline15Eng

Cours Les formes dans l’espace
Chapitre Les formes en 3D
Temps d'apprentissage récommandé 6h
Date de mise en ligne 10/04/2015
Date fin d'apprentissage (Recommandé) 11/04/2015
Date de mise en hors ligne 25/04/2015
 

1-2-AIWDesign Tools & Applications required - Applications required (Eng)

Published on 31 March 2015
Hits: 7683
Module Environment requires /Drawing / Conception
Cours Tools & Applications required
Chapitre Applications required
Temps d'apprentissage récommandé 6h (x2)
Date de mise en ligne 30/03/2015
Date fin d'apprentissage (Recommandé) -
Date de mise en hors ligne -

 

appsAdobe suite ( photoshop, Illustrator, Dreamweaver, Flash, After Effect)

All pictures management Applications

 

1-1-AIWDesign Tools & Applications required - tools required (Eng)

Published on 30 March 2015
Hits: 7558
Module Environment requires /Drawing / Conception
Cours Tools & Applications required
Chapitre Tools required
Temps d'apprentissage récommandé 6h (x2)
Date de mise en ligne 30/03/2015
Date fin d'apprentissage (Recommandé) -
Date de mise en hors ligne -

 

Materiel à dessin
copyright © PACOMAG

Matériaux requis

Dessin
            • Pencil 2H, HB, B, 2B,4B, 6B, 8B et 9B
            • Grey colored paper (110g-120g/m²) minimum pour faire des exercices avec les crayons sépia, pierre noire et/ou le fusain et le crayon sépia ;
            • Paper in A3 format;
          •  
 Romy-Saverys-matériel-Graphisme-1024x489
Graphic/web design
              • PC/portable or a macintosh
              • A tablet
              • A scanner
Photographie
              • un camera
Video
              • A video camera
 

2-2-AIWDesign Perspective - Application (Eng)

Published on 29 March 2015
Hits: 7755
Item Environment installation / Drawing / conception
Course Perspective
Chapter Application
Period of training required
24h
Publication Date
13/04/2015
End of training period (suggested) 14/04/2015
Offline
30/04/2015

 

How to apply perspective

You can imply perspective by the relative size of objects, layering foreground, mid-ground, and background elements, changing focus by sharpening or softening details, and lightening or darkening elements as the atmosphere changes the quality of “seeing” things in the distance.
If you can combine linear perspective with natural perspective, you can make a convincing drawing that easily allows the observer to “suspend belief” and be drawn into your creation.
 
 

One Point Perspective

(Single Point - One Vanishing Point)

single point perspective

The front plane of the object is directly in front of you, verticals parallel, and all lines of perspective meet at a single vanishing point on the horizon. Objects you draw in one point perspective are drawn face on.
 
Practice:
1) Draw a horizon line and center a vanishing point.
2) Draw a square or rectangle off to the side of the vanishing point, overlapping the horizon line.
3) Lightly draw (or visualize) orthogonal "visual rays" from the vanishing point through the edges of your object.
4) Then draw the vertical lines of the back of the object using the rays as a measure.
 

 Two Point Perspective

(Two Vanishing Points)

two point perspective
When an object or viewpoint is rotated and two sides of an object are angled away from your view, each side of the object has it's own unique lines of perspective. You now must use two vanishing points, one for each plane of the surface in view with the vertical lines parallel.
 
Practice:
1) Draw a horizon line and place two vanishing points on the far right and left sides.
2) Draw a vertical line indicating the closest edge of the object facing you.
3) Lightly draw (or visualize) orthogonal "visual rays" from each vanishing point to the line of the front edge of your object.
4) Then draw the vertical lines of the left and right edges of the object using the rays as a measure.
 
 

Three Point Perspective

(Bird’s Eye, Worm’s Eye - Three Vanishing Points)
 
perspectiveart3

If your point of observation is higher or lower a third vanishing point comes into use. Think of looking up at tall skyscrapers and seeing three vertical sides angle to a third vanishing point, far distant, as they reach toward the sky. From the Worm’s Eye view (looking up) the upper vanishing point is called the Zenith. From the Bird’s Eye or Helicopter view (looking down) the lower vanishing point is called the Nadir.
 
Practice:
1) Draw a horizon line and place two vanishing points on the far right and left sides.
2) Draw a vertical line bisecting the horizon line and place a third vanishing point above (or below) the horizon line.
3) Lightly draw (or visualize) orthogonal "visual rays" from the top vanishing point past the horizon line.
4) Then draw orthogonal lines from the left and right vanishing points and bisect the orthogonal lines from the top vanishing points using the rays as a measure.
 
Surfaces that travel away from the viewer, on the other hand, converge towards a single ‘vanishing point‘. This is a point that is located directly in front of the viewer’s eyes, on a ‘horizon line’ (also known as an ‘eye level line’), as illustrated in the photo below:
 
1-point-perspective-vanishing-point
All receding edges of the buildings in this one point perspective photo angle towards the single vanishing point. The position of the vanishing point tells us that the photographer was crouching down, with his eye level lowered.
 
 
It is possible to draw over photographs to identify vanishing points, horizon lines and true shapes. Studying the work of famous artists can also help you gain an understanding of one point perspective, as shown in the example by Vincent van Gogh below.
 
 
van-gogh-perspective
‘Bedroom in arles’ by Vincent van Gogh – identifying perspective lines
 
Exercise yourself; identify the horizontal line and vanishing point(s) of the pictures you are taking with your camera or the master pieces of art you can get online.
 

Exercice : A chair

The purpose of the exercice is to draw a chair (made of rectangle parallelepipoid in 3D)

First draw an horizontal line with two vanishing point, just like below;

Image utilisateur

Like for a square or a cube, draw a front edge of the chair. In this exemple, start from one of the chair leg front edge and then draw lines starting from the two vanish points :

Image utilisateur

From vanishing points, draw crossing lines (the thickness is up to you) and link intersection points:

Image utilisateur

Now, draw the paralells lines linking the intersection points (see below), the first chair leg is drawn.

Image utilisateur

Draw the other legs just like it ahs been done above, in the process the seat of the chair thickness can be drawn too.

Image utilisateur

The seat of the chair can then be drawn as usual by extending the lines from the vanishing point until the intersection point.

Image utilisateur

Here is the chair with four legs and seat.

Image utilisateur

It's nearly the en, the cahir back need the be drawn.

Image utilisateur

Erase fondation lines to get a more clear and clean output.

Image utilisateur

The chair legs are too long, this can easily be fixed as you can see below

Image utilisateur
Image utilisateur

With the perspective fundamentals in mind you can easily size the chair as you wish.

 
 

2-1-AIWDesign Perspective - Introduction & Definition (Eng)

Published on 29 March 2015
Hits: 8186
Item  Environment installation / Drawing / conception
Course Perspective
Chapter Introduction & definition
Period of training required
24h
Publication Date
31/03/2015
End of training period (suggested) 02/04/2015
Offline
14/04/2015

 

INTRODUCTION

Perspective allows an artist to control the illusion of depth in an image with space ranging from a few inches to many miles. Linear and atmospheric perspective must be used together to make the illusion effectively. You will study each in turn then construct a photomontage that exhibits your understanding of both.  Both systems of perspective describe how objects appear in relation to their distance from the observer. This is not so much science as a means of describing, and by interpretation of illustrating, objects in space.

 

DEFINITION

Perspective, in the context of vision and visual perception, is the way in which objects appear to the eye based on their spatial attributes; or their dimensions and the position of the eye relative to the objects. There are two main meanings of the term: linear perspective and aerial perspective.

LINEAR PERSPECTIVE

It seems obvious that the apparent size of an object decreases the farther you get away from it. It is a surprise that this has not always been understood to be so. There is some indication from looking at mosaics that the ancient Greeks knew how to use perspective but no documents from that time have survived. The first written information about linear perspective appeared about 400 years ago. It was in Europe during the Renaissance that the concept of linear perspective was finally formalized.

Linear perspective is a system for drawing objects that use lines and vanishing points to determine how much an object's apparent size changes with space.

 

BASIC CONCEPTS

The horizon line is a theoretical line that represents the eye level of the observer. The horizon line is the same as the horizon (the edge of the land against the sky) only on a large flat plane like the ocean. Most of the time geographic features (hills) and other objects (trees and buildings) make the horizon above the horizon line.

Indoors the horizon is often not visible but there is still a theoretical horizon line representing the point of view of the observer.

Look at the three sketches below. The same telephone pole is in the same position in all of the formats. The horizon (line) is different. Can you tell where you are in relationship to the poles?

eyelevel

The first pole is seen from above, the second from normal eye level and the third appears to be floating over your head. An object's relationship with the horizon line shows whether you are looking up, down or straight at the object.

Vanishing points are points (usually) on the horizon line where receding lines (planes) converge. The vanishing point (v.p.) is on the horizon line when an objects has horizontal planes that are parallel to the ground. When the object's planes are inclined the vanishing points can be above or below the horizon line.

 vp1

Objects that are placed parallel to one another use the same vanishing points. Objects set at different angles each have their own vanishing points.

multivp

There are two basic systems of linear perspective: one-point and two-point named after the number of vanishing points used in each.

            • All parallel lines follow the same rules. If one goes to a vanishing point then all like lines go to the same vanishing point. In most systems vertical lines are drawn vertical (not in three-point perspective).
            • The station point represents the eye of the observer. It is the camera in a photograph.
            • The picture plane is the "window" that is represented by the picture.
            • The ground line is a line that is parallel to the picture plane at the base of the object being depicted.

 

ONE-POINT PERSPECTIVE

One-point perspective is what you see when you look straight at the side of an object. It uses only one vanishing point, hence its name.

onept

The line of sight in one-point perspective is perpendicular (at a right angle to) the side of the cube in these examples. That means you see the near side in plane view (actual shape undistorted by perspective)

onept2

There are only three kinds of lines used in one-point perspective:

Vertical edges are shown as vertical lines.

Horizontal edges (perpendicular to the line of sight and parallel to the ground) are shown as horizontal lines.

Edges that recede (are parallel to the line of sight) are on lines that converge at the vanishing point on the horizon line.

Note that these same three (and only these three) kinds of lines are used to draw the cubes regardless to where they are in the picture.

Also note that the cube to the left, while technically correct, appears distorted. One-point perspective only depicts objects near the vanishing point with accuracy.

 

TWO-POINT PERSPECTIVE
Two-point perspective is used when you look at or into the corner of an object. There are two vanishing points since the two sets of sides are receding in two different directions.

2point1

 

In the real world vanishing points are very far apart. Imagine strings streaming out parallel to the edges of a cube going to the horizon. The horizon is miles away so the vanishing points are many miles apart. When you draw them only a few inches apart on a piece of paper there is going to be some distortion in the image produced.

 

2point2

Again there are only three different kinds of lines needed to draw in two-point perspective:

Verticaledges are drawn as vertical lines.

Edges of sides that recede toward the right are on lines converging at the right vanishing point.

Edges of sides that recede toward the left are on lines converging at the left vanishing point.

Both of the cubes in the example use only the same three kinds of lines. You see the top of the cube below the horizon line (your eye level). You see the bottom of the cube above the horizon line and more of its left side because it is to the right of your position in the center of the vanishing points.

 

cf.

http://en.wikipedia.org/wiki/Perspective_%28visual%29

http://daphne.palomar.edu/design/space2.html

To deepen :

http://www.bbc.co.uk/schools/gcsebitesize/design/graphics/drawingformalrev1.shtml

http://www.artyfactory.com/perspective_drawing/perspective_index.html

http://en.softonic.com/s/free-perspective-drawing

cf.

 

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Africa IT Women, Created June 24th, 2013, is a non-profit organization that assists women with the potential to build a career in the field of new technologies and emerging business.

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