If this text is set to follow the movements of an object - via setAnimationSlave() - an evaluated function of this object's parameter can be printed after the text.
>>> tt >>> Add text s|name|text|HIDDEN $ .|d|x|1.0|At position x: .|d|y|-0.5|y: .|s|text|your text|The path to the image file must specify in respect to the directory of the applets jar-archives (e.g. "classes")
For instance, if there's a directory "images" in directory "classes" the path should read "images/xy.gif".
If these two directories were on the same level, it should rather be: "../images/xy.gif"
".." always addresses the parent directory
Safest is storing the image in the same directory as the jar-archives, so it is simply referred as "xy.gif"
>>> tt >>>
Add image
s|name|image|HIDDEN
$
.|d|x|3.0|At position x:
.|d|y|0.5|y:
.|s|file|smile.gif|display image:
addObject|
#FFDA92
>>> tt >>>
Moves the optic elements and the rays in into the foreground after having inserted other graphics.
>>> tt >>>
Bench foreground
s|name|bench|HIDDEN
$
.|f|foo| |HIDDEN
setDragable|
#FFFF99
>>> tt >>>
Change the drag property of a wire or loop after it has been created. Use the id returned by the add methods to identify the object you wish to change.
Parameters:
id - the object identifier
drag - true if dragable
Returns:
true if successful
>>> tt >>>
make dragable
o|id||This object:
b|drag|true|will be dragable:
setResizable|
#FFFF99
>>> tt >>>
Make an object resizable. A resizable object will usually change its physical properites. For example, a resizable lens will change
its focal length.
Parameters:
id - the object identifier.
resizable - property
Returns:
true if successful.
>>> tt >>>
make resizable
o|id||This object:
b|isResizable|true|will be resizable:
setRGB|
#FFFF99
>>> tt >>>
Set the red, green, and blue color values for an object that has already been created.
color values must be in the range
0..255.
Parameters: r=red, g=green, b=blue
Use color tables of other software to determine these values or guess the additive light mixing:
For instance, yellow = red + green, so try (255,255,0)
brown is a dark red, thus (100,0,0) may work.
>>> tt >>>
object's color
o|id||Paint this object:
i|r|255|with intensities 0..255 for red:
i|g|255|green:
i|b|0|blue:
setShowFocus|
#FFFF99
>>> tt >>>
The focus of lenses and mirrors will be drawn as a white dot on the axis.
Parameters:
id - the object identifier
show - true to show the focus
Returns:
true if successful
>>> tt >>>
focus visible
o|id||The focus of this object:
b|show|true|will be visible:
setVisibility|
#FFFF99
>>> tt >>>
Show or hide an object.
Parameters:
show - true will show object on screen
Returns:
true if successful false otherwise
>>> tt >>>
object visible
o|id||This object:
b|show|false|will be visible:
setDisplayOffset|
#FFFF99
>>> tt >>>
Offset the object's position on the screen from its default drawing position.
Parameters:
id - The id of the object.
xoff - The x offset.
yoff - The y offset.
Returns:
True if successful.
>>> tt >>>
draw with offset
o|id||This object:
i|xOff|10|will be drawn higher by:
i|yOff|10|pixels and/or shifted to the right by:
setAnimationSlave|
#FFFF99
>>> tt >>>
Force an object to follow another object on the screen.
Parameters:
masterID - The id of the master object.
slaveID - The id of the slave object.
Returns:
true if successful.
>>> tt >>>
make follow
o|masterid||This object:
o|slaveid||will follow this object:
addObject|id
#FFFF70
>>> tt >>>
Specify a region to which other objects can be bound. Use its new ID in a separate setContraint() command to apply this restriction to an object.
>>> tt >>>
Constraint region
s|name|constraint|HIDDEN
$
.|d|xmin||xmin:
.|d|xmax||xmax:
.|d|ymin||ymin:
.|d|ymax||ymax:
setConstraint|
#FFFF70
>>> tt >>>
Restrict the possible movements of an object to a region that is specified as a "constraint" in a separate command.
>>> tt >>>
restrict motion
o|id||This object:
o|constraintid||is restricted by this constraint (as defined below):
setPropertyDrag|
#CCFFCC
>>> tt >>>
Determines if elements added after value is set will be allowed to have their properties changed by dragging
Parameters:
pd - True or False
>>> tt >>>
all property drag
b|pd|true|All elements created after will be dragable:
setDirection|
#CCFFCC
>>> tt >>>
Set the direction that sources added after will start in
Parameters:
d - d=1 or d=-1. d=1 is to the right. d=-1 is to the left
>>> tt >>>
beam direction
i|d|-1|All sources added after emit in this direction (to the right 1/ left -1):
setInfo|
#CCFFCC
>>> tt >>>
Determines if elements added after value will show information on screen including focal lengths and positions
Parameters:
i - True or False
>>> tt >>>
all show info
b|i|true|All elements added after show their position, focal length etc.
setDrag|
#CCFFCC
>>> tt >>>
Determines if elements added after value is set will be allowed to be dragged
Parameters:
d - True or False
>>> tt >>>
all dragable
b|d|true|All elements added after will be dragable:
setDefault|
#CCFFCC
>>> tt >>>
Calls the following methods: setPixPerUnit(100), setInfo(false), setElementSize(.8), setDrag(false), setPropertyDrag(false), & setDirection(1)
>>> tt >>>
Default values
setElementSize|
#B3EFFF
>>> tt >>>
Set the size of all optic elements. Size=1 will make the height of the elements equal to the height of the applet.
Parameters:
s - Size in the range 0 to 1.0
>>> tt >>>
object's size
d|s|0.7|The size of all objects shall be this fraction of the applet's height:
setRayRGB|
#B3EFFF
>>> tt >>>
Set the color of the source light rays.
color values must be in the range
0..255.
Parameters: r=red, g=green, b=blue
Use color tables of other software to determine these values or guess the additive light mixing:
For instance, yellow = red + green, so try (255,255,0)
brown is a dark red, thus (100,0,0) may work.
>>> tt >>>
ray color
i|r|255|Intensities 0..255 for color components - red:
i|g|255|green:
i|b|0|blue:
setElementRGB|
#B3EFFF
>>> tt >>>
Set the color of lenses and mirrors. 0,0,0 will reset default.
Parameters:
r - 0, g - 0, b - 0
>>> tt >>>
lens/mirror color
i|r|255|Lenses and mirrors are displayed in colors (0..255) - red:
i|g|255|green:
i|b|0|blue:
setPixPerUnit|
#B3EFFF
>>> tt >>>
Set the Pixels per Unit.
Parameters:
ppu - 100 pixels per unit is as if on the screen 100 pixels represents 1 meter
>>> tt >>>
Pixel per Unit
i|ppu|100|a unit of length corresponds to this many pixels:
setAutoRefresh|
#B3EFFF
>>> tt >>>
Repaint every time the system parameters are changed.
Overrides: setAutoRefresh in class SApplet
>>> tt >>>
setAutoRefresh
b|ar|true|Applet shall be repainted after every change of system parameters:
getFocalLength|f
#E9D3FF
>>> tt >>>
Get the element's focal length
The result - here stored in a variable - can be used in other JavaScript commands.
>>> tt >>>
get focal length
o|id||Create a variable containing the focal length of this object:
getIndex|n
#E9D3FF
>>> tt >>>
Get the element's index of refraction
The result - here stored in a variable - can be used in other JavaScript commands.
>>> tt >>>
get index n
o|id||Create a variable containing the index of refraction of this object:
getXPos|x
#E9D3FF
>>> tt >>>
Get the element's x position.
The result - here stored in a variable - can be used in other JavaScript commands.
>>> tt >>>
get x position
o|id||Create a variable containing the x position of this object:
getYPos|y
#E9D3FF
>>> tt >>>
Get the element's y position.
The result - here stored in a variable - can be used in other JavaScript commands.
>>> tt >>>
get y position
o|id||Create a variable containing the y position of this object:
clearAll|
#FFFFFF
>>> tt >>>
Clears all elements from bench and repaints
>>> tt >>>
Clear all