Difference between revisions of "love.window.fromPixels (简体中文)"

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== See Also ==
 
== See Also ==
* [[parent::love.window]]
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* [[parent::love.window (简体中文)]]
 
* [[love.window.toPixels]]
 
* [[love.window.toPixels]]
 
* [[love.window.getPixelScale]]
 
* [[love.window.getPixelScale]]

Revision as of 17:41, 8 May 2016

Available since LÖVE 0.9.2
This function is not supported in earlier versions.

把数字从像素单位转换为像素密度无关单位。

窗口内的像素密度可能比窗口的“大小”更大(或更小)。例如通过love.window.setMode 启用在Mac OS X 上的Retina屏幕的highdpi ,窗口会使用相同的800x600的物理窗口大小,但窗口的内部区域使用1600x1200像素。

那样的话love.window.fromPixels(1600) 将返回 800


这个函数转换坐标从像素到用户期望的在屏幕上显示的大小。love.window.toPixels函数则相反。在Mac OS X 和 iOS平台上,highdpi的window flag必须被启用,以使用Retina屏幕的全像素密度。

这个标志在Windows 和 Linux上不产生影响,但在Android上总是启用的。

大多数的 LÖVE 函数返回值及参数期待像素单位而不是像素无关单位。

(Most LÖVE functions return values and expect arguments in terms of pixels rather than density-independent units. )

Function

Synopsis

value = love.window.fromPixels( pixelvalue )

Arguments

number pixelvalue
将要转换成像素无关单位的一个以像素为单位的数字。

Returns

number value
The converted number, in density-independent units.

Function

Synopsis

x, y = love.window.fromPixels( px, py )

Arguments

number px
The x-axis value of a coordinate in pixels.
number py
The y-axis value of a coordinate in pixels.

Returns

number x
The converted x-axis value of the coordinate, in density-independent units.
number y
The converted y-axis value of the coordinate, in density-independent units.

Notes

The units of love.graphics.getWidth, love.graphics.getHeight, love.mouse.getPosition, mouse events, love.touch.getPosition, and touch events are always in terms of pixels.

See Also

Other Languages