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Topic: Straight lines

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In the News (Wed 17 Jul 19)

  How to get Moire from your computer.
The equations in lines 44 and 46 are the generating functions, solved to determine the distance from the center; that distance is then compared against the list of bounding radii in the data statement, while a count is kept to determine the light/dark decision.
The lines were close enough together that the ]['s associated with near intersections seemed to clutter up the picture, so I modified the print routine for the version shown in the fourth to eliminate them, and the result shows the moire lines much more clearly.
In the third pattern (shown on page 174), radial straight lines of alternating color, the hoped for illusion was not striking, but the detail near the center of the pattern was very rewarding anyway.
www.atarimagazines.com /creative/v10n2/174_How_to_get_Moire_from_you.php   (3757 words)

 The UnMuseum - The Lines of Nazca
In and around the lines there are also trapezoidal zones, strange symbols, and pictures of birds and beasts all etched on a giant scale that can only be appreciated from the sky.
The Nasca lines were created by clearing the darkened pampa stones to either side and exposing the lighter sand underneath.
Two wooden stakes placed as a straight line would be used to guide the placement of a third stake along the line.
www.unmuseum.org /nazca.htm   (910 words)

 Equations of Straight Lines
When working with straight lines, there are many ways to arrive at an equation which represents the line.
Lines that are horizontal have a slope of zero.
Given that the slope of a line is -3 and the line passes through the point (-2,4), write the equation of the line.
regentsprep.org /Regents/math/line-eq/EqLines.htm   (305 words)

 VirtualPeru.net: The Nazca Lines
The Nazca Lines area series of drawings of animals, geometric figures and birds ranging up to300 metres (1000 feet) in size, etched into the arid crust of the pampa and preserved for about 2000 years thanks to a complete lack of rain and specialwinds that cleaned - but not erased - the desert.
He first thought the lines were part of a pre-Inca irrigation system, but he quickly concluded it had nothing to do with irrigation.
Although it must have been very difficult to draw such lines on the ground, lines that can only be seen from the sky, many "scientists" think it has something to do with alien navigation systems, made by creatures from other planets.
www.virtualperu.net /peru_arch_nazca_lines.html   (263 words)

 Geometric Primitives in Web Design. Straight Lines - webreference.com
straight line is the most basic geometric shape, although it's rarely the first thing that comes to an average designer's mind.
They undoubtedly originate from the lines on flowcharts and callouts; that's why they prefer horizontal and vertical directions, sometimes are dotted, and sometimes have arrowheads, notches, or bullets at their ends.
Besides the functions of connectors and dividers, horizontal lines are sometimes used as close underlines for text headings.
www.webreference.com /dlab/9707/lines.html   (760 words)

 Nazca Lines (Morgana's Observatory)
Occasional travelers through Nazca had doubtless noticed the strange and obviously artificial lines in the desert floor, but the lines were unimpressive and meaningless at ground level.
The so-called Nazca lines, of which there are thousands, consist, according to investigator William H. Isbell, of five kinds of markings: long straight lines; large geometric figures; drawings of plants and animals; rock piles; and figures decorating hillsides.
The lines may be as narrow as six inches or as wide as several hundred yards.
www.dreamscape.com /morgana/rosalind.htm   (893 words)

 Despite Straight Lines - Wikipedia, the free encyclopedia
Despite Straight Lines is the debut album by British New Wave musician Marilyn, released in 1985 (see 1985 in music).
Marilyn (born Peter Robinson), is a close friend and associate of Boy George from Culture Club.
Marilyn's follow-up album in 1986 was to be recorded in the United States with Don Was as producer, however legal and financial problems stymied the project.
en.wikipedia.org /wiki/Despite_Straight_Lines   (148 words)

 Proportions of Angles between Straight Lines of Picture   (Site not responding. Last check: 2007-11-05)
If on reproduction of artwork we draw lines which repeat all straight lines of picture and pick up them into one point, then we will notice that many of directions are the same.
If we pick up lines of artworks of an artist or a few artists who work after one canon into one point, we shall see that lines’ directions repeat themselves from one picture to another and their quantity is not large.
Lines of works of one period of ancient style or of one author of later epochs plotted into one point named as a directional star.
www.geocities.com /jumaclt1/prop3en.html   (731 words)

 MSN Encarta - Heraldry
A shield parted per saltire (divided into four parts by two crossed diagonal lines) and per cross is called a gyronny of eight, and each segment is called a gyron.
When the shield is completely divided into a number of equal parts by a pale, bend, bar, or chevron (see below), it is said to be paly, bendy, barry, or chevrony, and the number of divisions is specified, as, for example, a paly of six or and sable.
A field divided by vertical and horizontal lines is called checky, and one divided by intersecting diagonal lines is called lozengy or fusilly (see below).
encarta.msn.com /encyclopedia_761565530/Heraldry.html   (864 words)

 Guide to Furniture Styles from Connected Lines   (Site not responding. Last check: 2007-11-05)
An English style of furniture, which is medieval in appearance with straight lines, rigid designs, sturdy construction, ornate carvings and a dark finish.
It is characterized by graceful straight lines, light construction, tapered legs, and the use of inlay, and contrasting veneers.
It is a neoclassical style characterized by delicate straight lines, light construction, contrasting veneers and neoclassical motifs and ornamentation.
www.connectedlines.com /styleguide   (743 words)

 Citations: Extracting Straight Lines - Burns, Hanson, Riseman (ResearchIndex)
The distinction between the terms line segments and lines will be made on the basis that a line is obtained by grouping these fragmented line segments.
If the line is lighter than the background, the derivative of the intensity will be positive at the left side of the bar and negative at the right side.
Then, these lines were removed from the elevation map, and the plane finder was run with the same parameters as used in Fig.
citeseer.ist.psu.edu /context/100424/0   (2836 words)

 Straight Lines
An important concept for a straight line in the (x, y)-plane is its slope.
The slope, or gradient, of a straight line is the tan of the angle that the line makes with the positive direction of the x-axis
The cartesian equation of a straight line having slope m is of the form
www.maths.abdn.ac.uk /~igc/tch/ma1002/revision/node10.html   (612 words)

 Lines and Slopes
The reason we are interested in straight lines is that they are so simple; we need to know only two pieces of information to describe a line completely.
The line y=1 has zero slope (there is no change in y as x changes), and thus no increase or decrease is occurring.
In the next demonstration, you can see that, for a line, the ratio of the change in y to the change in x is always the same no matter which two points are chosen.
www.ugrad.math.ubc.ca /coursedoc/math100/notes/zoo/line.html   (692 words)

 Chapter 1 Section 7
This procedure is enormously useful, as it very often happens that the experimental result you are looking for appears as a parameter of a curve you determine graphically, such as the slope or intercept of a straight line.
The best-fit recipe assumes all the data are equally uncertain, and thus draws a line with a slightly smaller slope.
The "best fit straight line" is a very standard procedure in data analysis, and it's available in all sorts of places.
itech.fgcu.edu /faculty/bbowman/Lab_Manual/CH_17.HTM   (1305 words)

 Hamilton - Math To Build On: Crossing & Parallel Lines
Parallel lines are lines in the same plane that never meet no matter how far they run.
These lines are parallel to each other because they are on the same plane (the surface of this piece of paper) and they are the same distances apart.
Note: This is not to say that you cannot draw lines that are not in the same plane and not parallel, but the lines we draw in our work usually are.
www.mathforum.org /~sarah/hamilton/ham.lines.html   (371 words)

 Straight Lines
Isn't that what songwriting is? I find that when people communicate in a straight line, it has greater emotional impact on the listener.
By straight lines of communication, of course, I don't mean obvious lines, clichés or obvious ways of saying things.
I mean that when you have something to communicate, musically and/or lyrically, and you put it there in the listener's ear with the precision and power of a laser beam, it will have more impact than if you pitched it out there somewhere in the vicinity of your listener.
www.lyricist.com /Schock/LASS12.HTM   (850 words)

 The Three Straight Lines   (Site not responding. Last check: 2007-11-05)
The three "straight" lines are one of the most important concepts to develop and is a key to internal body connection.
The other two straight lines (left side and right side) connect the Jianjing (GB-21) point on the shoulder to the center of the hip joint, and the hip joint to the Yongquan (K-1) point on the bottom of the foot.
When the lines through points 3, 4 and 5 are set up and the "shoulder well" is connected to the "Gushing spring" then the shoulder will feel connected to the feet.
www3.sympatico.ca /alduncan/three_straight_lines.htm   (324 words)

 Straight Lines   (Site not responding. Last check: 2007-11-05)
A specific straight line can be determined by specifying two distinct points that the line passes through, or it can be determined by giving one point that it passes through and somehow describing how “tilted” the line is.
Suppose we have a graph of an unknown straight line.
As mentioned earlier, a line is fully described by giving its slope and one distinct point that the line passes through.
www.jamesbrennan.org /algebra/lines/straight_lines.htm   (1248 words)

 Web Design: Practical Drawing Series - Lines / WebDeveloper.com ®
In this article we look into elementary practical lessons that will help you to learn drawing straight lines and curves on the plane, building simple geometric figures and stroking.
Lines on picture b) are the same size.
You can use these paper sheets with lines for another good exercise - finding proportions visually; find the middle of the horizontal and vertical lines and divide lines to 3, 4, 5 and 6 similar parts.
www.webdeveloper.com /design/design_drawing_lines.html   (521 words)

 Fitting Straight Lines to Data by Least Squares   (Site not responding. Last check: 2007-11-05)
We will consider two different straight lines for describing how Y depends on X, and explore the notion that one of the lines fits the data better than the other line.
Be aware, however, that it is almost always a bad idea to fit a straight line to such a small amount of data.
Actual data almost never lie exactly on a straight line, but we sometimes want to approximate them with a straight line that fits as well as possible.
www.sscnet.ucla.edu /soc/faculty/mcfarland/soc113/leastsq.htm   (346 words)

 Section 1
A part of line a between points A and B including these points is called a line segment AB or simply segment AB.
A part of line a that consists of an endpoint A and all points that are located on the same side of a with respect to A, is called a ray.
If a point D belongs to two lines a and b at the same time then we say that D is a point of intersection of a and b or that two lines a and b intersect at point D.
www.math.psu.edu /geom/koltsova/section1.html   (345 words)

 Adobe Illustrator Tutorial : LARC 440
You use the pen tool in Illustrator to draw straight lines by creating anchor points, which as the name implies, hold a line at specific points.
To begin a line position the pen tool over the point where you want the line to begin and click.
To complete a line segment position the pen tool over the point where you want the segment to end.
online.caup.washington.edu /courses/larcwi01/larc440/illustrator_DrawLines.htm   (233 words)

 Equations of Straight Lines
As mentioned in the discussion of lines on the previous page, only two pieces of information are needed to completely describe a given line.
First, recall that a tangent line has the property that it "touches" a curve, intersecting it at a single point and having "the same direction" as the curve.
The special property of a circle is that the tangent line at each point on the circle is perpendicular to the radius vector.
www.ugrad.math.ubc.ca /coursedoc/math100/notes/zoo/eqline.html   (1039 words)

 Moving Straight Lines   (Site not responding. Last check: 2007-11-05)
We start with the simplest type of straight lines, the ones that go through the origin of the coordinate system.
Straight lines through a point P in direction of a vector D.
Straight line through two points P and Q.
www.mathcs.emory.edu /~rudolf/math108/summ1-2-3/node20.html   (141 words)

 Straight Lines and Curves   (Site not responding. Last check: 2007-11-05)
Mark each circle with a straight line, a curved line, or both (see # 2.
Have the children sort the letters by whether they are made of straight lines, curved lines or both, and place each type in one of the circles.
If straight and curved lines are a new concept, then you may want to start with only 2 circles and only all straight or all curved letters.
cela.albany.edu /literacycorner/activities/LinesCurves.htm   (211 words)

 CGTalk - Painting straight lines
You can do straight lines on any angle in photoshop if you place one point, then shift-click to the next area (or shift-pen).
There's a slight difference between the lines, but you'll even make it out in a thumbnail which lines are digitally created and which ones are not.
Straight lines are better painted at zoomed out levels, but he goes all over the screen.
forums.cgsociety.org /showthread.php?p=1754042   (402 words)

 New Transition Curve Joining Two Straight Lines   (Site not responding. Last check: 2007-11-05)
In this paper, a new transition curve to be used in the design of the horizontal geometry of routes has been examined.
This curve joins two straight lines with a single element.
It is an alternative curve to the well-known classical transition curve, which is formed by spiral curve–circular arc spiral curve.
www.pubs.asce.org /WWWdisplay.cgi?9704468   (171 words)

 Straight Lines in Nature
First, the straight line is a very specific kind of a line and I do not think that it is particularly over- or under-represented in nature.
Slate is a rock that has straight lines due to its crystalline structure.
However, most living things are made up of organic compounds that are polar (unsymmetrical if you like) in nature and do not form "straight lines" in their compound bondings.
www.newton.dep.anl.gov /askasci/gen99/gen99430.htm   (709 words)

 ConceptArt.org Forums - feng zhu dvd straight lines question
Click and hold where you want the line to end and drag to get the angle you want, to make the line perfectly vertical or perfectly horizontal, or to shorten or lengthen the straight line brushstroke.
When the straight line brushstroke is at the angle you want (or perfectly horizontal or vertical) and the length you want it to be, let go.
On the dvd Feng pretty much draws any line he wants quicker than a ruler can be used and i know the sift key is what he's using because of how the wrong lines are sometimes drawn (then erased), i get the same results myself (much too often).
www.conceptart.org /forums/printthread.php?t=28504   (1043 words)

 Equations of Straight Lines
When working with straight lines, there are often many ways to arrive at an equation or a graph.
Plot the (x,y) coordinates to graph the line.
While charts often contain more than 2 entries, only two entries are needed to determine a straight line.
regentsprep.org /Regents/math/glines/EqLines.htm   (290 words)

 ConceptArt.org Forums - Straight lines in Painter
Now if you want a series of straight lines that aren't connected to each other (parallel lines, perspective lines, etc.) the techniques changes a bit.
Again click the "v" to enter straight line mode, draw your straight line and release (or click your second point).
Now hit the "v" again for straight line, and you can begin a second straight line anywhere that is not tied to the first one you did.
www.conceptart.org /forums/printthread.php?t=39008   (477 words)

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