Click to have details about construction
Building tools
Click to have details about construction
Enter functions
Click to have details about function
Measures tools
Click to have details about tool
Utilities
Click to have details about utilities
Drawing tools
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Hide an object (It can be used by others objects) Erase all objects of the figure Show/Hide names of points |
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Colors for use
Dashed lines | |
| Save in text file objects of the figure Load text file to create figure Save figure as svg Print figure in popup window |
Move a free point:
By default, free points are
red. You click on the point and left button pressed, you move the point
and all the figure is rebuilded .
Create a new free point
Click in plane to place
this new point
Drawing a segment
Click on two points, free or
not, and the segment is created.
Drawing a line
Click on two points, free or
not, and the line is created.
Drawing perpendicular line through
midpoint
Click on two points, free or not, or on one segment.
Drawing a parallel line
Click on a point,
free or not, and a line or a segment to give direction.
Select order has no
importance.
Drawing a perpendicular line
Click on a point,
free or not, and a line or a segment to give direction.
Select order has no
importance.
Drawing intersections
You can select two
segments, one segment and one line, two lines, one segment and one circle, one
line and one circle or two circles. Select order has no importance.
Drawing midpoint of two points or a
segment
Click on two points, free or not, or on one segment.
Drawing circle's center
Select one circle, the
point will be the center of the circle.
Drawing circle by diameter
Select two points
or a segment to define diameter of the circle.
Drawing circle by center and a
point
Select two points, first is the center and the circle pass through
the second.
.
Drawing circle by three points
Clich on three
points, free or not, the circle will passed through the three points if
they are not on a same line.
Dilating an object
You enter scale factor in
dialog box. You select center of dilatation, point free or not, and the object
to be dilated, point, segment, line, polygon or circle.
Rotating an object
You enter scale factor in
dialog box. You select center of dilation, point free or not, and the object to
be rotated, point, segment, line, polygon or circle.
Translating an object
You select two points,
free or not, as vector and the object to be translated, point, segment,
line, polygon or circle. Caution: vector of translation begin with first
selected point
Reflecting an object through a line
You select
one line as mirror and the object to be reflected, point, segment, line, polygon
or circle.
Building a polygon
You select points,
free or not, you select twice the last point.The polygon is drawed and filled.
You can change colors. You can also select a circle, the circle is filled.
Put a point on an object
You click on
a line or a circle, one point is created on this line or this circle.You can
drag the constructed point, but it always stays on the object on which it was
created.
Drawing the locus of a point or a
line
Select a point on object and one constructed point or one line. If
the locus object is a point, you will have a continuous curve stitched
together from sampled locations of the point as the driver point moves along its
path. Otherwise the locus will be a set of lines.
Put a point by coordinates
This command allows
you to type in the coordinates of points you wish to plot in the coordinate
system.
Grid
You will have grid 1x1. The grid can be
colored, dashed.
Coordinates system
You enter minimum and
maximum for x, then minimum for y.
By default coordinates system is
-10..10 x -10 ..10
Coordinates of a point
You select a point, free
or not. The coordinates of the selected point will be displayed in html page.
The coordinates will be actualised when you move the point.
Distance between two points or length of a
segment
This command displays the distance between two selected points or
the length of a selected segment.
Angle defined by three points
This command
displays the measure of the angle defined by three selected points. The order of
selection determines the angle, with the second point being the vertex of the
angle.
Center and radius of a circle
This command
displays the coordinates of the center and the radius of the selected
circle.
Equation of a line
This command displays the
equation of the selected line as ux+vy+w=0.
Enter a line by equation
You enter u, v and w, equation is u*x + v*y + w = 0
Draw cartesian graph
You enter function f(x) to plot points given by y = f(x)
Draw polar graph
You enter function r(t) to plot points M given by OM = r(t), t angle from OM
with horizontal axis
Draw parametric graph
You enter functions x(m) and y(m) to plot points given by x = x(m) and y = y(m)
Zoom in
You can get zoom in on your drawing
Zoom out
You can after a zoom in retrieve previous picture
Pan
You can move picture ( only if you make one or more zoom in )
You can also use mouse, left button pressed on canvas to move it