在电晕中画出并擦（擦）线

发布于 2024-12-09 15:38:22 字数 316 浏览 0 评论 0原文

我使用下面的代码画了一条线，

但如果手指触摸同一条线，我想删除该线。有什么想法吗？

function drawLine( event )
  if(event.phase == "ended") then
    line = display.newLine(event.xStart, event.yStart, event.x, event.y)
    line:setColor(255,0,0)
    line.width = 5
  end
end
Runtime:addEventListener("touch", drawLine)

原文

I used following code to draw a line

But i want to erase that line if finger touches on same line.. Any Idea?

function drawLine( event )
  if(event.phase == "ended") then
    line = display.newLine(event.xStart, event.yStart, event.x, event.y)
    line:setColor(255,0,0)
    line.width = 5
  end
end
Runtime:addEventListener("touch", drawLine)

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方圜几里 2024-12-16 15:38:22

简单的。使该线成为传感器，一旦用户触摸该线，就将其从组中删除或删除该对象。

physics.addBody( line, { isSensor = true } ) 
someGroup:insert(line)
line.collision = removeLine   --some function that removes the line from the group someGroup
line:addEventListener(""touch"", line)

Simple. Make the line a sensor and as soon as the user touches the line, remove it from the group or delete the object.

physics.addBody( line, { isSensor = true } ) 
someGroup:insert(line)
line.collision = removeLine   --some function that removes the line from the group someGroup
line:addEventListener(""touch"", line)

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