improve: save the line_width of last point

@@ -371,8 +371,9 @@
 			drawMouse();
 		}
 
-		var last_ext_press = 0;
+
 		/*
+		var last_ext_press = 0;
 		function draw_ext_input(px,py,press) {
 			x = px * ratio_x;
 			y = py * ratio_y;
@@ -397,12 +398,13 @@
 
 
 	        var previousPoint = new Point(0,0,0), currentPoint= new Point(0,0,0);
+			var previousWidth = 0;
 			var kWIDTH_MIN = 0.2;
 			var kWIDTH_MAX = 3.0;
 			//current width
 			var strokeWidth = 3.0;
 			var rotate_degree = 0;
-			var pressure_level = 2048.0;
+			var pressure_level = 2048.0 - 1;
 
 		function draw_ext_input(px, py, press) {
             if(press == 0) {
@@ -455,6 +457,7 @@
 				ctx.beginPath(); //Start path
 				ctx.arc(pt.x, pt.y, line_width, 0, Math.PI * 2, true); // Draw a point using the arc function of the canvas with a point structure.
 				ctx.fill();
+				previousWidth = line_width;
 			}
 
 			function draw_line(pt) {
@@ -478,7 +481,7 @@
 
 	            var stepx, stepy ,stepw;
 	            var times = 0;
-				var w0 = (kWIDTH_MAX - kWIDTH_MIN)/pressure_level * previousPoint.p + kWIDTH_MIN;
+				var w0 = previousWidth;
 				var w1 = (kWIDTH_MAX - kWIDTH_MIN)/pressure_level * pt.p + kWIDTH_MIN;
 				var dw = w1 - w0;
 
@@ -512,6 +515,8 @@
 	            y += stepy;
 				w += stepw;
              	}
+
+				previousWidth = w1;
             }
 
 
@@ -1338,7 +1343,7 @@
 			   if(cur_pen_type == 0) {
 				  ext_input_panel_width = 21000;
 				  ext_input_panel_height = 29800;
-				  pressure_level = 2048.0;
+				  pressure_level = 2048.0 - 1;
 				  var w = ext_input_panel_width * 1.0;
 				  var h = ext_input_panel_height * 1.0;
 				  var canvasw = w / h * canvas_height;
@@ -1347,7 +1352,7 @@
 				  rotate_degree = 0;
 			   }
 			   else {
-				 pressure_level = 1024.0;
+				 pressure_level = 1024.0 - 1;
 			   }