diff --git a/CHANGES.md b/CHANGES.md
index 88d8da30caec..8067f5b703ba 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -49,6 +49,7 @@ var geometry = BoxGeometry.createGeometry(box);
 * Optimized polyline bounding spheres.
 * `Viewer` now automatically sets its clock to that of the first added `DataSource`, regardless of how it was added to the `DataSourceCollection`.  Previously, this was only done for dropped files by `viewerDragDropMixin`.
 * Upgraded Knockout from version 2.2.1 to 2.3.0.
+* Fixed triangulation for polygons that cross the international date line.
 
 ### b19 - 2013-08-01
 
diff --git a/Source/Core/GeometryPipeline.js b/Source/Core/GeometryPipeline.js
index 0cffdb4bf1b6..0348b57fae2f 100644
--- a/Source/Core/GeometryPipeline.js
+++ b/Source/Core/GeometryPipeline.js
@@ -1546,8 +1546,8 @@ define([
                 indices[4] = 2;
                 indices[6] = 1;
             } else if (p1Behind) {
-                getXZIntersectionOffsetPoints(p1, p0, u1, q1);
-                getXZIntersectionOffsetPoints(p1, p2, u2, q2);
+                getXZIntersectionOffsetPoints(p1, p2, u1, q1);
+                getXZIntersectionOffsetPoints(p1, p0, u2, q2);
 
                 indices[0] = 1;
                 indices[3] = 2;
diff --git a/Specs/Core/GeometryPipelineSpec.js b/Specs/Core/GeometryPipelineSpec.js
index 40f3b1fe9951..d22094417f5f 100644
--- a/Specs/Core/GeometryPipelineSpec.js
+++ b/Specs/Core/GeometryPipelineSpec.js
@@ -1768,7 +1768,15 @@ defineSuite([
         expect(geometry.indices).toEqual([0, 3, 4, 1, 2, 6, 1, 6, 5]);
 
         var positions = geometry.attributes.position.values;
-        expect(positions.subarray(0, 3 * 3)).toEqual([-1.0, -1.0, 0.0, -1.0, 1.0, 2.0, -1.0, 2.0, 2.0]);
+        var expectedPositions = [];
+        expectedPositions.push(-1.0, -1.0, 0.0, -1.0, 1.0, 2.0, -1.0, 2.0, 2.0);
+        var midpoint2 = new Cartesian3(-1, -CesiumMath.EPSILON11, 2/3);
+        var midpoint1 = new Cartesian3(-1, -CesiumMath.EPSILON11, 1);
+        expectedPositions.push(midpoint1.x, midpoint1.y, midpoint1.z, midpoint2.x, midpoint2.y, midpoint2.z);
+        midpoint1.y = -midpoint1.y;
+        midpoint2.y = -midpoint2.y;
+        expectedPositions.push(midpoint1.x, midpoint1.y, midpoint1.z, midpoint2.x, midpoint2.y, midpoint2.z);
+        expect(positions).toEqual(expectedPositions);
         expect(positions.length).toEqual(7 * 3);
     });
 
@@ -1788,7 +1796,15 @@ defineSuite([
         expect(geometry.indices).toEqual([1, 3, 4, 2, 0, 6, 2, 6, 5]);
 
         var positions = geometry.attributes.position.values;
-        expect(positions.subarray(0, 3 * 3)).toEqual([-1.0, 1.0, 2.0, -1.0, -1.0, 0.0, -1.0, 2.0, 2.0]);
+        var expectedPositions = [];
+        expectedPositions.push(-1.0, 1.0, 2.0, -1.0, -1.0, 0.0, -1.0, 2.0, 2.0);
+        var midpoint1 = new Cartesian3(-1, -CesiumMath.EPSILON11, 2/3);
+        var midpoint2 = new Cartesian3(-1, -CesiumMath.EPSILON11, 1);
+        expectedPositions.push(midpoint1.x, midpoint1.y, midpoint1.z, midpoint2.x, midpoint2.y, midpoint2.z);
+        midpoint1.y = -midpoint1.y;
+        midpoint2.y = -midpoint2.y;
+        expectedPositions.push(midpoint1.x, midpoint1.y, midpoint1.z, midpoint2.x, midpoint2.y, midpoint2.z);
+        expect(positions).toEqual(expectedPositions);
         expect(positions.length).toEqual(7 * 3);
     });
 
@@ -1808,7 +1824,16 @@ defineSuite([
         expect(geometry.indices).toEqual([2, 3, 4, 0, 1, 6, 0, 6, 5]);
 
         var positions = geometry.attributes.position.values;
-        expect(positions.subarray(0, 3 * 3)).toEqual([-1.0, 1.0, 2.0, -1.0, 2.0, 2.0, -1.0, -1.0, 0.0]);
+        var expectedPositions = [];
+        expectedPositions.push(-1.0, 1.0, 2.0, -1.0, 2.0, 2.0, -1.0, -1.0, 0.0);
+        var midpoint2 = new Cartesian3(-1, -CesiumMath.EPSILON11, 2/3);
+        var midpoint1 = new Cartesian3(-1, -CesiumMath.EPSILON11, 1);
+        expectedPositions.push(midpoint1.x, midpoint1.y, midpoint1.z, midpoint2.x, midpoint2.y, midpoint2.z);
+        midpoint1.y = -midpoint1.y;
+        midpoint2.y = -midpoint2.y;
+        expectedPositions.push(midpoint1.x, midpoint1.y, midpoint1.z, midpoint2.x, midpoint2.y, midpoint2.z);
+        expect(positions).toEqual(expectedPositions);
+
         expect(positions.length).toEqual(7 * 3);
     });
 
@@ -1818,7 +1843,7 @@ defineSuite([
                 position : new GeometryAttribute({
                     componentDatatype : ComponentDatatype.DOUBLE,
                     componentsPerAttribute : 3,
-                    values : new Float64Array([-1.0, 2.0, 0.0, -1.0, -1.0, 0.0, -1.0, -1.0, 0.0])
+                    values : new Float64Array([-1.0, 1.0, 0.0, -1.0, -1.0, 0.0, -2.0, -1.0, 0.0])
                 })
             },
             indices : new Uint16Array([0, 1, 2]),
@@ -1828,7 +1853,15 @@ defineSuite([
         expect(geometry.indices).toEqual([1, 2, 4, 1, 4, 3, 0, 5, 6]);
 
         var positions = geometry.attributes.position.values;
-        expect(positions.subarray(0, 3 * 3)).toEqual([-1.0, 2.0, 0.0, -1.0, -1.0, 0.0, -1.0, -1.0, 0.0]);
+        var expectedPositions = [];
+        expectedPositions.push(-1.0, 1.0, 0.0, -1.0, -1.0, 0.0, -2.0, -1.0, 0.0);
+        var midpoint1 = new Cartesian3(-1, -CesiumMath.EPSILON11, 0);
+        var midpoint2 = new Cartesian3(-1.5, -CesiumMath.EPSILON11, 0);
+        expectedPositions.push(midpoint1.x, midpoint1.y, midpoint1.z, midpoint2.x, midpoint2.y, midpoint2.z);
+        midpoint1.y = -midpoint1.y;
+        midpoint2.y = -midpoint2.y;
+        expectedPositions.push(midpoint1.x, midpoint1.y, midpoint1.z, midpoint2.x, midpoint2.y, midpoint2.z);
+        expect(positions).toEqual(expectedPositions);
         expect(positions.length).toEqual(7 * 3);
     });
 
@@ -1838,7 +1871,7 @@ defineSuite([
                 position : new GeometryAttribute({
                     componentDatatype : ComponentDatatype.DOUBLE,
                     componentsPerAttribute : 3,
-                    values : new Float64Array([-1.0, -1.0, 0.0, -1.0, 2.0, 0.0, -1.0, -1.0, 0.0])
+                    values : new Float64Array([-2.0, -1.0, 0.0, -1.0, 1.0, 0.0, -1.0, -1.0, 0.0])
                 })
             },
             indices : new Uint16Array([0, 1, 2]),
@@ -1848,7 +1881,15 @@ defineSuite([
         expect(geometry.indices).toEqual([2, 0, 4, 2, 4, 3, 1, 5, 6]);
 
         var positions = geometry.attributes.position.values;
-        expect(positions.subarray(0, 3 * 3)).toEqual([-1.0, -1.0, 0.0, -1.0, 2.0, 0.0, -1.0, -1.0, 0.0]);
+        var expectedPositions = [];
+        expectedPositions.push(-2.0, -1.0, 0.0, -1.0, 1.0, 0.0, -1.0, -1.0, 0.0);
+        var midpoint1 = new Cartesian3(-1, -CesiumMath.EPSILON11, 0);
+        var midpoint2 = new Cartesian3(-1.5, -CesiumMath.EPSILON11, 0);
+        expectedPositions.push(midpoint1.x, midpoint1.y, midpoint1.z, midpoint2.x, midpoint2.y, midpoint2.z);
+        midpoint1.y = -midpoint1.y;
+        midpoint2.y = -midpoint2.y;
+        expectedPositions.push(midpoint1.x, midpoint1.y, midpoint1.z, midpoint2.x, midpoint2.y, midpoint2.z);
+        expect(positions).toEqual(expectedPositions);
         expect(positions.length).toEqual(7 * 3);
     });
 
@@ -1858,7 +1899,7 @@ defineSuite([
                 position : new GeometryAttribute({
                     componentDatatype : ComponentDatatype.DOUBLE,
                     componentsPerAttribute : 3,
-                    values : new Float64Array([-1.0, -1.0, 0.0, -1.0, -1.0, 0.0, -1.0, 2.0, 0.0])
+                    values : new Float64Array([-1.0, -1.0, 0.0, -2.0, -1.0, 0.0, -1.0, 1.0, 0.0])
                 })
             },
             indices : new Uint16Array([0, 1, 2]),
@@ -1868,7 +1909,15 @@ defineSuite([
         expect(geometry.indices).toEqual([0, 1, 4, 0, 4, 3, 2, 5, 6]);
 
         var positions = geometry.attributes.position.values;
-        expect(positions.subarray(0, 3 * 3)).toEqual([-1.0, -1.0, 0.0, -1.0, -1.0, 0.0, -1.0, 2.0, 0.0]);
+        var expectedPositions = [];
+        expectedPositions.push(-1.0, -1.0, 0.0, -2.0, -1.0, 0.0, -1.0, 1.0, 0.0);
+        var midpoint1 = new Cartesian3(-1, -CesiumMath.EPSILON11, 0);
+        var midpoint2 = new Cartesian3(-1.5, -CesiumMath.EPSILON11, 0);
+        expectedPositions.push(midpoint1.x, midpoint1.y, midpoint1.z, midpoint2.x, midpoint2.y, midpoint2.z);
+        midpoint1.y = -midpoint1.y;
+        midpoint2.y = -midpoint2.y;
+        expectedPositions.push(midpoint1.x, midpoint1.y, midpoint1.z, midpoint2.x, midpoint2.y, midpoint2.z);
+        expect(positions).toEqual(expectedPositions);
         expect(positions.length).toEqual(7 * 3);
     });