SimpleContourRenderer class
The purpose of this class is to provide a simple renderer capable of drawing the contours of a function z=f(x,y). However, this renderer is more general and not only suited for drawing contours, but any kind of lines into a 2D htlm canvas element.
Constructors
-
SimpleContourRenderer(CanvasElement contourCanvas, int dataAreaWidth, int dataAreaHeight, int dataAreaX, int dataAreaY, Map<
CtourA, String> contourAttr) -
Creates a renderer which will draw into
contourCanvas. The data area size and position covered by the drawing is given bydataAreaWidth,dataAreaHeight,dataAreaX,dataAreaY.contourAttr
Properties
-
attr
↔ Map<
CtourA, String> -
read / write
- c2d ↔ CanvasRenderingContext2D
-
read / write
-
CONTOUR_DEFAULT_ATTRIBUTES
→ Map<
CtourA, String> -
Contour attribute defaults
final
- contourCanvas ↔ CanvasElement
-
read / write
- dataAreaHeight ↔ int
-
read / write
- dataAreaWidth ↔ int
-
read / write
- dataAreaX ↔ int
-
read / write
- dataAreaY ↔ int
-
read / write
- hashCode → int
-
The hash code for this object. [...]
read-only, inherited
- last_x1 ↔ int
-
read / write
- last_x2 ↔ int
-
read / write
- last_y1 ↔ int
-
read / write
- last_y2 ↔ int
-
read / write
- runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Methods
-
drawContourLine(
double startX, double startY, double endX, double endY, double contourLevel, int levelNumber) → void -
Implements the ContourRenderer: draws the specified contour line
belonging to
contourLevelinto the graphics 2D context.contourLevelis needed to color the line: Here we give a different color to positive and negative levels. -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed. [...]
inherited
-
toString(
) → String -
Returns a string representation of this object.
inherited
-
xToScreen(
double x) → int -
yToScreen(
double y) → int
Operators
-
operator ==(
Object other) → bool -
The equality operator. [...]
inherited