Tuesday, 31 May 2016

Simple elements in Technical Drawing



LANGUAGE AND NOTATION OF BASIC GEOMETRY


POINT
A precise location or place on a plane. Usually represented by a dot, a cross or an x. Since a point is a place, not a thing, it has no dimensions. We label points with capital letters.

LINE
A geometrical object that is straight, infinitely long and infinitely thin. A line is one-dimensional. It has zero width. Using two points, we can create only one line.
In the figure above, the line PQ passes through the points P and Q, and goes off in both directions forever, and is perfectly straight. A line, strictly speaking, has no ends.

VERTICAL AND HORIZONTAL LINES
A vertical line is one which runs up and down the page.
A horizontal line is one which runs left-to-right across the page. It comes from the word 'horizon', in the sense that horizontal lines are parallel to the horizon.

horizon

RAY
A portion of a line which starts at a point and goes off in a particular direction to infinity. One way to think of a ray is a line with one end. The point where the ray starts is called the endpoint. A ray is one-dimensional. It has zero width. A ray has no measurable length, because it goes on forever in one direction.
P is the endpoint

LINE SEGMENT
A straight line which links two points without extending beyond them. A line segment is one-dimensional. It has a measurable length, but has zero width.
P and Q are the endpoints of the line segment y

MIDPOINT OF A LINE SEGMENT
A point on a line segment that divides it into two equal parts. The halfway point of a line segment.

M is the midpoint
P and Q are the endpoints of the line segment
Besides, points P, M and Q are collinear, because they are on the same line segment.



INTERSECTION OF LINES
The point where two lines or two line segments meet or cross.
Animation.
In the figure above we would say that "point K is the intersection of line segments PQ and AB".
Another way it may be said is that "the line segment PQ intersects AB at point K".
PARALLEL LINES
Lines are parallel if they lie in the same plane, and are the same distance apart over their entire length. No matter how far you extend them, they will never meet.
PERPENDICULAR LINES
A line is perpendicular to another if it meets or crosses it at right angles (90°).
Animation.
AB is perpendicular to DF
To review parallel and perpendicular lines, take a look at this video:


CIRCLE
Language and notation of the circle


A circle is a line forming a closed loop, every point on which is a fixed distance from a center point.
A circumference is how far you have to go around the circle or if you put a string on the circle, how long will the string have to be.

There is a difference between a circle and a disk. A circle is a line, and so, for example, has no area - just as a line has no area. A disk however is a round portion of a plane which has a circular outline. If you draw a circle on paper and cut it out, the round piece is a disk.
Radius animation.
Diameter animation.
Arc animation.
Sector animation.
Tangent animation.
Secant animation.

A review of circles:


PLANE
A flat surface that is infinitely large and with zero thickness. The plane has two dimensions: length and width. But since the plane is infinitely large, the length and width cannot be measured.

PARALLEL PLANES
A flat surface that is infinitely large and with zero thickness. You can think of parallel planes as sheets of cardboard one above the other with a gap between them. Parallel planes are the same distance apart everywhere, and so they never touch.

The two bases of this cilinder are parallel planes

INTERSECTING PLANES
If two planes are not parallel, then they will intersect (cross over) each other somewhere. Two planes always intersect at a line, as shown on the right.
This is similar to the way two lines intersect at a point.

SOLID GEOMETRY
When making technical drawings, REMEMBER:
  1. DATA: Use your 0,4 technical pen. (You will often find data given)
  2. AUXILIARY or CONSTRUCTRIONS LINES AND ARCS: Use your 0,2 technical pen.
  3. SOLUTIONS or RESULTS: Use your 0,8 technical pen.
If you are not using your technical pen but pencils:
  1. DATA: Use your HB pencil. (You will often find data given)
  2. AUXILIARY or CONSTRUCTRIONS LINES AND ARCS: Use your 2H-3H... pencil.
  3. SOLUTIONS or RESULTS: Use your HB pencil underlining twice.

Monday, 30 May 2016

The foundation of geometry

Introduction
Introduction to constructions.  Compass. Ruler. Straightedge. Euclid.

Now, learn and enjoy with these introductory videos:
You will have to learn all this vocabulary. But... don't worry! We will go with it step by step.

POINT - LINE


PARALLEL LINES - CONVERGING LINES - ANGLE - TRIANGLES


ACUTE, RIGHT AND OBTUSE ANGLES - CIRCLE - RADIUS - CIRCUMFERENCE - DIAMETER


SQUARE - DEGREES


DEGREES IN A TRIANGLE


EQUILATERAL, ISOSCELES AND SCALENE TRIANGLES.
ACUTE, RIGHT ANGLED AND OBTUSE TRIANGLES.



POLYGONS (Wondeful video using Origami Technique)

Sunday, 29 May 2016

Saturday, 28 May 2016

Color online


  • Color of my sound. Enjoy! Music in color.
  • Color Palette Generator. Enter the URL of an image to get a color palette that matches the image. This is useful for coming up with a website color palette that matches a key image a client wants to work with.
  • Color Hunter. A similar one.
  • El color. All about color with a lot of interactive activities.
  • Art games- Warm and cool colors. Level 1. Use the mouse to control the opening so that the warm and cool colors are in the proper sides.



Sunday, 22 May 2016

Elements of art: COLOUR



Color LIGHT - Color PIGMENT

Braid colour






  • This is the color wheel template just in case you need a new copy.
COLOUR WHEEL TEMPLATE by RFA2009


A piece of advice while working with temperas:


  • 7 activities to be creative using colors in Plas-TIC I.
  • 6 activities to learn more about colors in Plas-TIC II.

Saturday, 21 May 2016

Elements of art: TEXTURES


Patterns and Textures on prezi:





  • HOMEWORK. At home: PRINT THIS BOOK, page 10 TEXTURE. Bring it and stick it in your notebook.

VISUAL TEXTURE:
  • Create your Picasso Portrait with visual textures (magazines, newpapers, white paper, cardboard, music paper...).

TACTILE TEXTURE:
  • You have to creat a collection of textures using recycled white sheets of paper, cloths, cotton, food, ....


  • Flow. Enjoy watching the changing patterns and colors as you mix pictures on two overlapping layers. Choose  designs from four sets of menu icons, or add to the flow by clicking the pencil tool to create your own designs.

Tuesday, 10 May 2016

2D shapes in Art: Roy Lichtenstein - POP ART

Roy Lichtentein is another POP ART artist. I'm sure you have seen his artworks in many places.

Ben-Day dots printing process
The Ben-Day dots printing process, named after illustrator and printer Benjamin Henry Day, Jr., is a technique dating from 1879. Depending on the effect, color and optical illusion needed, small colored dots are closely spaced, widely spaced or overlapping. Magenta dots, for example, are widely spaced to create pink.

Benday Dots.svg
To apply the dots to a drawing the artist would purchase transparent overlay sheets. The sheets were available in a wide variety of dot size and distribution, which gave the artist a range of tones to use in the work. The overlay material was cut in the shapes of the tonal areas desired, shadow or background or surface treatment and rubbed onto the specific areas of the drawing with a burnisher.

And... some cheap ideas:




  • Artisamcam Explore Pop Art. Explore the work of Roy Lichtenstein and create your own comic book style using Benday dots just like the famous Pop Artist.
  • Phrase it. Upload a photo and make it be comic style with bubbles and drama!