Methods
(static) applyUrlSettings(opt_objopt, opt_argumentNameopt) → {Object}
Read settings from URL. Assume settings it a
JSON like URL as in http://foo?settings={key:value},
Note that unlike real JSON we don't require quoting
keys if they are alpha_numeric.
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
opt_obj |
Object |
<optional> |
object to apply settings to. |
opt_argumentName |
String |
<optional> |
name of key for settings, default = 'settings'. |
- Source:
Returns:
object with settings
- Type
- Object
(static) clamp(v, min, max) → {Number}
Clamp value
Parameters:
| Name | Type | Description |
|---|---|---|
v |
Number | value to clamp |
min |
Number | min value to clamp to |
max |
Number | max value to clamp to |
- Source:
Returns:
v clamped to min and max.
- Type
- Number
(static) clampPlusMinus(v, max) → {Number}
Clamp in both positive and negative directions. Same as clamp(v, -max, +max)
Parameters:
| Name | Type | Description |
|---|---|---|
v |
Number | value to clamp |
max |
Number | max value to clamp to |
- Source:
Returns:
v clamped to -max and max.
- Type
- Number
(static) createTextNode(element) → {HTMLTextNode}
Inserts a text node into an element
Parameters:
| Name | Type | Description |
|---|---|---|
element |
HTMLElement | element to have text node insert |
- Source:
Returns:
the created text node
- Type
- HTMLTextNode
(static) degToRad(d) → {Number}
Convert degrees to radians
Parameters:
| Name | Type | Description |
|---|---|---|
d |
Number | value in degrees |
- Source:
Returns:
d in radians
- Type
- Number
(static) findCSSStyleRule(selector) → (nullable) {Rule}
finds a CSS rule.
Parameters:
| Name | Type | Description |
|---|---|---|
selector |
string |
- Source:
Returns:
matching css rule
- Type
- Rule
(static) getAbsolutePosition(element) → {Object}
Returns the absolute position of an element for certain browsers.
Parameters:
| Name | Type | Description |
|---|---|---|
element |
HTMLElement | The element to get a position for. |
- Source:
Returns:
An object containing x and y as the absolute position of the given element.
- Type
- Object
(static) invertPlusMinusRange(v, max) → {Number}
flips 0->max to max<-0 and 0->min to min->0 In otherwords max: 3, v: 2.7 = 0.3 max: 3, v:-2.7 = -0.3 max: 3, v: 0.2 = 2.8 max: 3, v:-0.2 = -2.8
Parameters:
| Name | Type | Description |
|---|---|---|
v |
Number | value to flip. |
max |
Number | range to flip inside. |
- Source:
Returns:
flipped value.
- Type
- Number
(static) minToZero(v, min) → {Number}
Takes which ever is closer to zero In other words minToZero(-2, -1) = -1 and minToZero(2, 1) = 1
Parameters:
| Name | Type | Description |
|---|---|---|
v |
Number | value to min |
min |
Number | min value to use if v is less then -min or greater than +min |
- Source:
Returns:
min or v, which ever is closer to zero
- Type
- Number
(static) parseUrlQuery(opt_objopt) → {Object}
Reads the query values from the current URL.
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
opt_obj |
Object |
<optional> |
Object to attach key values to |
- Source:
Returns:
Object with key values from URL
- Type
- Object
(static) parseUrlQueryString(url, opt_objopt) → {Object}
Reads the query values from a URL like string.
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
url |
String | URL like string eg. http://foo?key=value |
|
opt_obj |
Object |
<optional> |
Object to attach key values to |
- Source:
Returns:
Object with key values from URL
- Type
- Object
(static) radToDeg(r) → {Number}
Converts radians to degrees
Parameters:
| Name | Type | Description |
|---|---|---|
r |
Number | value in radians |
- Source:
Returns:
r in degrees
- Type
- Number
(static) rand32BitColor({function(number):) → {string}
get a random 32bit color
Parameters:
| Name | Type | Description |
|---|---|---|
{function(number): |
number?) opt_randFunc function to generate random numbers |
- Source:
Returns:
random 32bit color
- Type
- string
(static) randCSSColor({function(number):) → {string}
get a random CSS color
Parameters:
| Name | Type | Description |
|---|---|---|
{function(number): |
number?) opt_randFunc function to generate random numbers |
- Source:
Returns:
random css color
- Type
- string
(static) randInt(value) → {number}
get a random int
Parameters:
| Name | Type | Description |
|---|---|---|
value |
number | max value exclusive. 5 = random 0 to 4 |
- Source:
Returns:
random int
- Type
- number
(static) resize(canvas, useDevicePixelRationullable)
Resizes a cavnas to match its CSS displayed size.
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
canvas |
Canvas | canvas to resize. |
|
useDevicePixelRatio |
boolean |
<nullable> |
if true canvas will be created to match devicePixelRatio. |
- Source:
(static) sign(v) → {Number}
Return sign of value
Parameters:
| Name | Type | Description |
|---|---|---|
v |
Number | value |
- Source:
Returns:
-1 if v < 0, 1 if v > 0, 0 if v == 0
- Type
- Number