diff --git a/demo/data/contours-1.js b/demo/data/contours-1.js
index 5deace6..a90d48f 100644
--- a/demo/data/contours-1.js
+++ b/demo/data/contours-1.js
@@ -1,6 +1,7 @@
 
 define(
     function(require) {
-        return {"xMin":-18,"yMin":109,"xMax":439,"yMax":483,"unicode":[57357],"advanceWidth":633,"leftSideBearing":-18,"name":"uniE00D","contours":[[{"x":-18,"y":382,"onCurve":true},{"x":6,"y":370},{"x":36,"y":370,"onCurve":true},{"x":68,"y":370},{"x":94,"y":385,"onCurve":true},{"x":133,"y":347},{"x":189,"y":347,"onCurve":true},{"x":245,"y":347},{"x":285,"y":385,"onCurve":true},{"x":324,"y":422},{"x":324,"y":476,"onCurve":true},{"x":324,"y":480},{"x":324,"y":483,"onCurve":true},{"x":336,"y":483,"onCurve":true},{"x":336,"y":171,"onCurve":true},{"x":-18,"y":171,"onCurve":true}],[{"x":439,"y":210,"onCurve":true},{"x":437,"y":259},{"x":400,"y":295,"onCurve":true},{"x":360,"y":332},{"x":304,"y":332,"onCurve":true},{"x":250,"y":332},{"x":212,"y":298,"onCurve":true},{"x":185,"y":314},{"x":151,"y":314,"onCurve":true},{"x":103,"y":314},{"x":37,"y":251},{"x":37,"y":160},{"x":70,"y":129,"onCurve":true},{"x":83,"y":117},{"x":97,"y":109,"onCurve":true},{"x":97,"y":210,"onCurve":true}]]}
+        return {"name":"uniE016","unicode":[57366],"xMin":146,"xMax":573,"yMin":119,"yMax":546,"leftSideBearing":146,"advanceWidth":926,"contours":[[{"x":146,"y":490,"onCurve":true},{"x":146,"y":518},{"x":165,"y":531,"onCurve":true},{"x":177,"y":543},{"x":202,"y":546,"onCurve":true},{"x":517,"y":546,"onCurve":true},{"x":542,"y":543},{"x":561,"y":531,"onCurve":true},{"x":573,"y":518},{"x":573,"y":490,"onCurve":true},{"x":573,"y":175,"onCurve":true},{"x":573,"y":153},{"x":561,"y":138,"onCurve":true},{"x":542,"y":125},{"x":517,"y":119,"onCurve":true},{"x":202,"y":119,"onCurve":true},{"x":177,"y":125},{"x":165,"y":138,"onCurve":true},{"x":146,"y":153},{"x":146,"y":175,"onCurve":true},{"x":146,"y":490,"onCurve":true}]]};
+
     }
 );
diff --git a/demo/js/editor.js b/demo/js/editor.js
index 2312197..c9ba0f9 100644
--- a/demo/js/editor.js
+++ b/demo/js/editor.js
@@ -10,7 +10,7 @@ define(
     function(require) {
 
         var editor = require('editor/main');
-        var shape_baidu = require('demo/../data/contours-12');
+        var shape_baidu = require('demo/../data/contours-1');
 
         var currentEditor;
 
diff --git a/demo/js/segmentCross.js b/demo/js/segmentCross.js
index 33895fd..4bbb6da 100644
--- a/demo/js/segmentCross.js
+++ b/demo/js/segmentCross.js
@@ -1,7 +1,7 @@
 /**
  * @file quadraticBezier.js
  * @author mengke01
- * @date 
+ * @date
  * @description
  * 二次贝塞尔直线相交演示
  */
@@ -22,7 +22,7 @@ define(
                 var width = canvas.offsetWidth;
                 var height = canvas.offsetHeight;
 
-                var points = [{"x":563.5776234567902,"y":637.5320987654322,"onCurve":true},{"x":563.5776234567902,"y":433.53209876543207,"onCurve":true},{"x":543,"y":478},{"x":10000,"y":478}] ;
+                var points = [{"x":300,"y":300,"onCurve":true},{"x":350,"y":350,"onCurve":true},{"x":200,"y":200},{"x":400,"y":400}];
 
                 $('[data-index]').each(function(index, item) {
                     if(!points[index]) {
@@ -62,15 +62,15 @@ define(
                 }
 
                 function draw() {
-                    
+
 
                     ctx.clearRect(0, 0, width, height);
-                    //绘制2次贝塞尔曲线  
+                    //绘制2次贝塞尔曲线
                     ctx.beginPath();
                     ctx.strokeStyle='black';
-                    ctx.moveTo(points[0].x, points[0].y);  
+                    ctx.moveTo(points[0].x, points[0].y);
                     ctx.lineTo(points[1].x, points[1].y);
-                    
+
                     ctx.moveTo(points[2].x, points[2].y);
                     if (points[3]) {
                         ctx.lineTo(points[3].x, points[3].y);
@@ -89,7 +89,7 @@ define(
                     if(r) {
                         ctx.beginPath();
                         r.forEach(function(item) {
-                            ctx.moveTo(item.x, item.y);  
+                            ctx.moveTo(item.x, item.y);
                             ctx.arc(item.x, item.y, 4, 0, Math.PI * 2, true);
                         });
                         ctx.fill();
@@ -101,7 +101,7 @@ define(
         };
 
         entry.init();
-        
+
         return entry;
     }
-);
\ No newline at end of file
+);
diff --git a/src/graphics/isSegmentCross.js b/src/graphics/isSegmentCross.js
index 4956402..869af29 100644
--- a/src/graphics/isSegmentCross.js
+++ b/src/graphics/isSegmentCross.js
@@ -99,6 +99,31 @@ define(
                 var seg1 = [s1.y - s0.y, -(s1.x - s0.x), s0.y * (s1.x - s0.x) - s0.x * (s1.y - s0.y)];
                 var seg2 = [t1.y - t0.y, -(t1.x - t0.x), t0.y * (t1.x - t0.x) - t0.x * (t1.y - t0.y)];
 
+                // 直线退化成点
+                if (seg1[0] === seg1[1] && seg1[0] === seg1[2] && seg1[0] === 0) {
+                    if (
+                        Math.abs((t1.y - s0.y) * (t0.x - s0.x) - (t0.y - s0.y) * (t1.x - s0.x)) <= 0.001
+                        && s0.x >= t0.x && s0.x <= t1.x
+                    ) {
+                        return [s0];
+                    }
+                    else {
+                        return false;
+                    }
+                }
+
+                if (seg2[0] === seg2[1] && seg2[0] === seg2[2] && seg2[0] === 0) {
+                    if (
+                        Math.abs((s1.y - t0.y) * (s0.x - t0.x) - (s0.y - t0.y) * (s1.x - t0.x)) <= 0.001
+                        && t0.x >= s0.x && t0.x <= s1.x
+                    ) {
+                        return [t0];
+                    }
+                    else {
+                        return false;
+                    }
+                }
+
                 // x轴重叠
                 if (seg1[1] === seg2[1] && seg1[1] === 0) {
                     if (s1.x === t1.x) {
diff --git a/src/graphics/pathJoin.js b/src/graphics/pathJoin.js
index ace383b..1c6dd3b 100644
--- a/src/graphics/pathJoin.js
+++ b/src/graphics/pathJoin.js
@@ -84,7 +84,7 @@ define(
             return paths.filter(function (path) {
                 return path.length > 2;
             }).map(function (path) {
-                return reducePath(deInterpolate(path));
+                return reducePath(deInterpolate(path)).reverse();
             });
         }
 
diff --git a/src/graphics/util.js b/src/graphics/util.js
index d788d03..52d251d 100644
--- a/src/graphics/util.js
+++ b/src/graphics/util.js
@@ -94,7 +94,7 @@ define(
          * @return {number}
          */
         function getPointHash(p) {
-            return Math.floor(7 * Math.floor(p.x * 11) + 31 * Math.floor(p.y * 131));
+            return Math.floor(7 * Math.floor(p.x * 10) + 131 * Math.floor(p.y * 100));
         }
 
         return {
diff --git a/unittest/spec/graphics/isSegmentCross.spec.js b/unittest/spec/graphics/isSegmentCross.spec.js
new file mode 100644
index 0000000..91703ef
--- /dev/null
+++ b/unittest/spec/graphics/isSegmentCross.spec.js
@@ -0,0 +1,65 @@
+
+define(
+    function (require) {
+
+        var isSegmentCross = require('graphics/isSegmentCross');
+
+        describe('测试直线相交', function () {
+
+            it('test cross', function () {
+                var result = isSegmentCross({"x":209,"y":358,"onCurve":true},{"x":341,"y":228,"onCurve":true},{"x":200,"y":200},{"x":396,"y":401});
+                expect(result.length).toEqual(1);
+                expect(result[0].x).toBeCloseTo(283, 0);
+                expect(result[0].y).toBeCloseTo(285, 0);
+            });
+
+            it('test hoz', function () {
+                var result = isSegmentCross({"x":246,"y":272,"onCurve":true},{"x":289,"y":171,"onCurve":true},{"x":200,"y":200},{"x":343,"y":200});
+                expect(result.length).toEqual(1);
+                expect(result[0].x).toBeCloseTo(276.6, 0);
+                expect(result[0].y).toEqual(200);
+            });
+
+            it('test vertical', function () {
+                var result = isSegmentCross({"x":144,"y":302,"onCurve":true},{"x":288,"y":172,"onCurve":true},{"x":201,"y":133},{"x":201,"y":351});
+                expect(result.length).toEqual(1);
+                expect(result[0].x).toEqual(201);
+                expect(result[0].y).toBeCloseTo(250.5, 0);
+            });
+
+            it('test parallel', function () {
+                var result = isSegmentCross({"x":201,"y":314,"onCurve":true},{"x":201,"y":197,"onCurve":true},{"x":201,"y":151},{"x":201,"y":354});
+                expect(result.length).toEqual(2);
+                expect(result[0].x).toEqual(201);
+                expect(result[0].y).toEqual(197);
+                expect(result[1].x).toEqual(201);
+                expect(result[1].y).toEqual(314);
+            });
+
+
+            it('test parallel cross', function () {
+                var result = isSegmentCross({"x":201,"y":314,"onCurve":true},{"x":201,"y":197,"onCurve":true},{"x":201,"y":149},{"x":201,"y":267});
+                expect(result.length).toEqual(2);
+                expect(result[0].x).toEqual(201);
+                expect(result[0].y).toEqual(197);
+                expect(result[1].x).toEqual(201);
+                expect(result[1].y).toEqual(267);
+            });
+
+            it('test parallel cross', function () {
+                var result = isSegmentCross({"x":300,"y":300,"onCurve":true},{"x":350,"y":350,"onCurve":true},{"x":200,"y":200},{"x":400,"y":400});
+                expect(result.length).toEqual(2);
+                expect(result[0].x).toEqual(300);
+                expect(result[0].y).toEqual(300);
+                expect(result[1].x).toEqual(350);
+                expect(result[1].y).toEqual(350);
+            });
+
+            it('test parallel not cross', function () {
+                var result = isSegmentCross({"x":312,"y":261,"onCurve":true},{"x":375,"y":323,"onCurve":true},{"x":200,"y":200},{"x":400,"y":400});
+                expect(result).toBe(false);
+            });
+
+        });
+    }
+);
diff --git a/unittest/spec/main.js b/unittest/spec/main.js
index 05a06ed..67eaef6 100644
--- a/unittest/spec/main.js
+++ b/unittest/spec/main.js
@@ -8,7 +8,6 @@ define(
     function (require) {
 
         // math
-        require('./math/gaussian-elimination.spec');
         require('./math/getBezierQ2T.spec');
 
         // ttf
@@ -16,5 +15,6 @@ define(
 
         // graphics
         require('./graphics/vector.spec');
+        require('./graphics/isSegmentCross.spec');
     }
 );
diff --git a/unittest/spec/math/gaussian-elimination.spec.js b/unittest/spec/math/gaussian-elimination.spec.js
deleted file mode 100644
index 6705b08..0000000
--- a/unittest/spec/math/gaussian-elimination.spec.js
+++ /dev/null
@@ -1,31 +0,0 @@
-
-define(
-    function (require) {
-
-        var gauss = require('math/gaussian-elimination');
-
-        describe('测试基本线性方程组', function () {
-
-            it('test one', function () {
-                var $A = [[4]];
-                var $x = [8];
-                var $result = gauss($A, $x);
-                expect($result).toEqual([2]);
-            });
-
-            it('test two', function () {
-                var $A = [[1, 1], [2, 1]];
-                var $x = [10, 16];
-                var $result = gauss($A, $x);
-                expect($result).toEqual([6, 4]);
-            });
-
-            it('test three', function () {
-                var $A = [[1, 1, 1], [2, 1, 2], [1, 2, 3]];
-                var $x = [6, 10, 14];
-                var $result = gauss($A, $x);
-                expect($result).toEqual([1, 2, 3]);
-            });
-        });
-    }
-);