Points and Rectangles
SenseTalk understands the concepts of geometric points and rectangles.
Points and Rectangles in SenseTalk
Any list of two numbers, or a text string consisting of two numbers separated by a comma, can be treated as a point. The first number represents the X coordinate of the point, and the second number the Y coordinate:
put [150,47] into pointA
put "250,98" into pointB
A rectangle can be represented by any list of two points, by a list of four numbers or by a text string consisting of four numbers separated by commas (representing two points). The two points indicate two opposite corners of the rectangle (either the top-left and bottom-right corners, or the bottom-left and top-right corners, listed in either order).
put [pointA,pointB] into myRect
put "15,28,19,72" into bounds
The Is Within
operator can be used to test whether a point lies within a rectangle or one rectangle is completely within another:
if [18,35] is within bounds then scoreHit
X
, Y
, Width
, Height
, Origin
, and Size
Functions
Behavior: These functions can be used to extract the various component values of a point or rectangle. The functions x
and y
can be used with points and rectangles to obtain the x and y coordinates of the point, or of the origin point of the rectangle. The origin
and size
functions can be used with rectangles to obtain the origin point (the minimum x and y values) and the size (a list of two numbers representing the width and height, respectively) of the rectangle. The width
and height
functions can be used with rectangles or sizes to obtain the width or height.
{the} x of pointOrRectangle x( pointOrRectangle ) {the} y of pointOrRectangle y( pointOrRectangle ) {the} width of rectangle width( rectangle ) {the} height of rectangle height( rectangle ) {the} origin of rectangle origin( rectangle ) {the} size of rectangle size( rectangle )
Examples:
These functions are most commonly used with the dot (.
), apostrophe-S (‘s
) or of
syntax, similar to accessing a property of an object, but keep in mind that these are not properties, but functions which return read-only values:
put pointA.x into horizontalLocation
put the y of pointA into verticalLocation
put myRect's origin into topLeftCorner
put the size of bounds into outerRect
put height of imageRect into verticalSpaceNeeded
Top
, Bottom
, Left
, Right
, TopLeft
, TopRight
, BottomLeft
, BottomRight
, Center
, TopCenter
, BottomCenter
, LeftCenter
, and RightCenter
Functions
Behavior: These functions can be used to find the coordinates of various parts of a rectangle.
The top
, bottom
, left
and right
functions return a single number which is the y coordinate of the top or bottom edge, or the x coordinate of the left or right edge, respectively, of a rectangle.
The topLeft
, topRight
, bottomLeft
and bottomRight
functions return the coordinates of the point at the indicated corner of a rectangle.
The center
function returns the coordinates of the center of a rectangle, and the topCenter
, bottomCenter
, leftCenter
and rightCenter
functions return the coordinates of the point at the center of the indicated edge of a rectangle.
{the} top of rectangle top( rectangle ) {the} bottom of rectangle bottom( rectangle ) {the} left of rectangle left( rectangle ) {the} right of rectangle right( rectangle ) {the} topLeft of rectangle topLeft( rectangle ) {the} topRight of rectangle topRight( rectangle ) {the} bottomLeft of rectangle bottomLeft( rectangle ) {the} bottomRight of rectangle bottomRight( rectangle ) {the} center of rectangle center( rectangle ) {the} topCenter of rectangle topCenter( rectangle ) {the} bottomCenter of rectangle bottomCenter( rectangle ) {the} leftCenter of rectangle leftCenter( rectangle ) {the} rightCenter of rectangle rightCenter( rectangle )
Examples:
These functions are most commonly used with the dot (.
), apostrophe-S (‘s
) or of
syntax, similar to accessing a property of an object, but keep in mind that these are not properties, but functions which return read-only values:
put boundingBox.top into highestEdge
put the bottomRight of doorFrame into anchorPoint
put myRect's center into centerPoint
put the leftCenter of bounds into alignmentPoint
Distance
Function
Behavior: The Distance function returns the distance between two points. Both 2-D and 3-D points are supported.
Syntax:
{the} distance between point1 and point2
{the} distance from point1 to point2
distance( point1 , point2 )
Examples:
put the distance from [100,100] to [130,140] --> 50
set myRect to [0,0,24,10]
put the distance between myRect.topLeft and myRect.center --> 13
put distance(startPoint, endPoint) into distanceTraveled
put distance from [12,14,50] to [48,17,22] --> 45.70558