2024年5月6日发(作者：)

var lineWidth = calcLineWidth( t , s );

//draw

ath();

( lastLoc.x , lastLoc.y );

( curLoc.x , curLoc.y );

Style = strokeColor;

dth = lineWidth;

p = "round";

in = "round";

();

lastLoc = curLoc;

lastTimestamp = curTimestamp;

lastLineWidth = lineWidth;

}

edown = function(e){

tDefault();

beginStroke( {x: X , y: Y} );

};

eup = function(e){

tDefault();

endStroke();

};

eout = function(e){

tDefault();

endStroke();

};

emove = function(e){

tDefault();

if( isMouseDown ){

moveStroke({x: X , y: Y})

}

};

ntListener('touchstart',function(e){

tDefault();

touch = s[0];

beginStroke( {x: , y: } )

});

ntListener('touchmove',function(e){

tDefault();

if( isMouseDown ){

touch = s[0];

moveStroke({x: , y: });

}

});

ntListener('touchend',function(e){

tDefault();

endStroke();

});

var maxLineWidth = 30;

var minLineWidth = 1;

var maxStrokeV = 10;

var minStrokeV = 0.1;

function calcLineWidth( t , s ){

var v = s / t;

var resultLineWidth;

if( v <= minStrokeV )

resultLineWidth = maxLineWidth;

else if ( v >= maxStrokeV )

resultLineWidth = minLineWidth;

else{

resultLineWidth = maxLineWidth - (v-minStrokeV)/(maxStrokeV-minStrokeV)*(maxLineWidth-minLineWidth);

}

if( lastLineWidth == -1 )

return resultLineWidth;

return resultLineWidth*1/3 + lastLineWidth*2/3;

}

function calcDistance( loc1 , loc2 ){

return ( (loc1.x - loc2.x)*(loc1.x - loc2.x) + (loc1.y - loc2.y)*(loc1.y - loc2.y) );

}