Class: Arrow

Arrow

new Arrow(trajectoryHelper)

Represents one Arrow with: position, time lived, time till death, length, forward speed, width
Parameters:
Name Type Description
trajectoryHelper TrajectoryHelper TrajectoryHelper to be used for this arrow
Source:

Members

(readonly) position :list

List of positions over time
Type:
  • list
Source:

(readonly) timeBorn :int

Timestep when this arrow was born
Type:
  • int
Source:

(readonly) timeData :list

List of head/tail positions and length over time
Type:
  • list
Source:

(readonly) timeDeath :int

Timestep when this arrow dies
Type:
  • int
Source:

(readonly) width :number

Width of this arrow
Type:
  • number
Source:

Methods

(private) _distancePointLine(point, lineStart, lineEnd) → {number}

Returns the distance from a point to a line segment
Parameters:
Name Type Description
point Point Point
lineStart Point Start point of line
lineEnd Point End point of line
Source:
Returns:
distance
Type
number

calcDataValues(time)

Calculates the length, and head and tail of this arrow this.position has to be set
Parameters:
Name Type Description
time int The time to calculate this values for
Source:

distance(other, time, dist) → {boolean}

Returns true if distance is kept.
Parameters:
Name Type Description
other Arrow The arrow to calculate the distance to
time int time for calculation
dist float the dist to check for
Source:
Returns:
true if distance is greater than dist
Type
boolean

distanceToMultiple(others, time, dist) → {boolean}

Returns true if distance to all is kept
Parameters:
Name Type Description
others Arrow The arrows to calculate the distance to
time int time for calculation
dist float the dist to check for
Source:
Returns:
true if distance is greater than dist
Type
boolean

draw(ctx, time, scale)

Draws the arrow on a canvas
Parameters:
Name Type Description
ctx Context2D Context for drawing
time number Timestep for drawing (including fraction times)
scale number scales the whole arrow by scale
Source:

getPolygon(time, borderopt) → {SAT.Polygon}

Returns a polygon that is defined by the linesegment from tail -> position -> head with the width of this.width
Parameters:
Name Type Attributes Description
time int time for calculation
border float <optional>
 border to add around polygon, default 0
Source:
Returns:
Polygon approximation
Type
SAT.Polygon

isAlive(time) → {boolean}

returns wether this arrow is alive at the given time
Parameters:
Name Type Description
time int asked for timestep
Source:
Returns:
true if arrow is alive at given position
Type
boolean

propagateToTime(startTime, time)

adds a position for the arrow at "time" timestep, based on the position of startTime and calculates the Data values for this timestep
Parameters:
Name Type Description
startTime int known timestep
time int asked for timestep
Source: