diff --git a/modules/opengl-commons/src/main/resources/org/gephi/viz-engine/shaders/edge/edge-line-directed.vert b/modules/opengl-commons/src/main/resources/org/gephi/viz-engine/shaders/edge/edge-line-directed.vert
index c29b53a..d12df49 100644
--- a/modules/opengl-commons/src/main/resources/org/gephi/viz-engine/shaders/edge/edge-line-directed.vert
+++ b/modules/opengl-commons/src/main/resources/org/gephi/viz-engine/shaders/edge/edge-line-directed.vert
@@ -29,6 +29,7 @@ attribute vec2 targetPosition;
 attribute float size;//It's the weight
 attribute vec4 sourceColor;
 attribute vec4 elementColor;
+attribute float sourceSize;
 attribute float targetSize;
 
 varying vec4 fragColor;
@@ -42,9 +43,10 @@ void main() {
     vec2 sideVector = vec2(-directionNormalized.y, directionNormalized.x) * thickness * 0.5;
     vec2 arrowHeight = directionNormalized * thickness * ARROW_HEIGHT * 2.0;
 
-    vec2 lineEnd = direction - directionNormalized * targetSize;
+    vec2 lineStart = directionNormalized * sourceSize;
+    vec2 lineLength = (direction - lineStart) - directionNormalized * targetSize;
 
-    vec2 edgeVert = lineEnd * vert.x + sideVector * vert.y + arrowHeight * vert.z;
+    vec2 edgeVert = lineStart + lineLength * vert.x + sideVector * vert.y + arrowHeight * vert.z;
 
     gl_Position = mvp * vec4(edgeVert + position, 0.0, 1.0);
 
diff --git a/modules/opengl-commons/src/main/resources/org/gephi/viz-engine/shaders/edge/edge-line-undirected.vert b/modules/opengl-commons/src/main/resources/org/gephi/viz-engine/shaders/edge/edge-line-undirected.vert
index 5d23c8a..d3360c4 100644
--- a/modules/opengl-commons/src/main/resources/org/gephi/viz-engine/shaders/edge/edge-line-undirected.vert
+++ b/modules/opengl-commons/src/main/resources/org/gephi/viz-engine/shaders/edge/edge-line-undirected.vert
@@ -29,6 +29,8 @@ attribute float size;//It's the weight
 attribute vec4 sourceColor;
 attribute vec4 targetColor;
 attribute vec4 elementColor;
+attribute float sourceSize;
+attribute float targetSize;
 
 varying vec4 fragColor;
 
@@ -40,8 +42,10 @@ void main() {
 
     vec2 sideVector = vec2(-directionNormalized.y, directionNormalized.x) * thickness * 0.5;
 
-    vec2 lineEnd = direction;
-    vec2 edgeVert = lineEnd * vert.x + sideVector * vert.y;
+    vec2 lineStart = directionNormalized * sourceSize;
+    vec2 lineLength = (direction - lineStart) - directionNormalized * targetSize;
+
+    vec2 edgeVert = lineStart + lineLength * vert.x + sideVector * vert.y;
 
     gl_Position = mvp * vec4(edgeVert + position, 0.0, 1.0);
 
diff --git a/modules/opengl-jogl/src/main/java/org/gephi/viz/engine/jogl/models/EdgeLineModelDirected.java b/modules/opengl-jogl/src/main/java/org/gephi/viz/engine/jogl/models/EdgeLineModelDirected.java
index b994aa0..b202c25 100644
--- a/modules/opengl-jogl/src/main/java/org/gephi/viz/engine/jogl/models/EdgeLineModelDirected.java
+++ b/modules/opengl-jogl/src/main/java/org/gephi/viz/engine/jogl/models/EdgeLineModelDirected.java
@@ -20,6 +20,7 @@ public class EdgeLineModelDirected {
     public static final int POSITION_TARGET_FLOATS = 2;
     public static final int SOURCE_COLOR_FLOATS = 1;
     public static final int COLOR_FLOATS = 1;
+    public static final int SOURCE_SIZE_FLOATS = 1;
     public static final int TARGET_SIZE_FLOATS = 1;
     public static final int SIZE_FLOATS = 1;
 
@@ -28,6 +29,7 @@ public class EdgeLineModelDirected {
         + POSITION_TARGET_FLOATS
         + SOURCE_COLOR_FLOATS
         + COLOR_FLOATS
+        + SOURCE_SIZE_FLOATS
         + TARGET_SIZE_FLOATS
         + SIZE_FLOATS;
 
@@ -67,6 +69,7 @@ private void initProgram(GL2ES2 gl) {
             .addAttribLocation(ATTRIB_NAME_SIZE, SHADER_SIZE_LOCATION)
             .addAttribLocation(ATTRIB_NAME_SOURCE_COLOR, SHADER_SOURCE_COLOR_LOCATION)
             .addAttribLocation(ATTRIB_NAME_COLOR, SHADER_COLOR_LOCATION)
+            .addAttribLocation(ATTRIB_NAME_SOURCE_SIZE, SHADER_SOURCE_SIZE_LOCATION)
             .addAttribLocation(ATTRIB_NAME_TARGET_SIZE, SHADER_TARGET_SIZE_LOCATION)
             .init(gl);
 
@@ -84,6 +87,7 @@ private void initProgram(GL2ES2 gl) {
             .addAttribLocation(ATTRIB_NAME_SIZE, SHADER_SIZE_LOCATION)
             .addAttribLocation(ATTRIB_NAME_SOURCE_COLOR, SHADER_SOURCE_COLOR_LOCATION)
             .addAttribLocation(ATTRIB_NAME_COLOR, SHADER_COLOR_LOCATION)
+            .addAttribLocation(ATTRIB_NAME_SOURCE_SIZE, SHADER_SOURCE_SIZE_LOCATION)
             .addAttribLocation(ATTRIB_NAME_TARGET_SIZE, SHADER_TARGET_SIZE_LOCATION)
             .init(gl);
 
@@ -101,6 +105,7 @@ private void initProgram(GL2ES2 gl) {
             .addAttribLocation(ATTRIB_NAME_SIZE, SHADER_SIZE_LOCATION)
             .addAttribLocation(ATTRIB_NAME_SOURCE_COLOR, SHADER_SOURCE_COLOR_LOCATION)
             .addAttribLocation(ATTRIB_NAME_COLOR, SHADER_COLOR_LOCATION)
+            .addAttribLocation(ATTRIB_NAME_SOURCE_SIZE, SHADER_SOURCE_SIZE_LOCATION)
             .addAttribLocation(ATTRIB_NAME_TARGET_SIZE, SHADER_TARGET_SIZE_LOCATION)
             .init(gl);
     }
diff --git a/modules/opengl-jogl/src/main/java/org/gephi/viz/engine/jogl/models/EdgeLineModelUndirected.java b/modules/opengl-jogl/src/main/java/org/gephi/viz/engine/jogl/models/EdgeLineModelUndirected.java
index f2d0013..0ff8246 100644
--- a/modules/opengl-jogl/src/main/java/org/gephi/viz/engine/jogl/models/EdgeLineModelUndirected.java
+++ b/modules/opengl-jogl/src/main/java/org/gephi/viz/engine/jogl/models/EdgeLineModelUndirected.java
@@ -22,6 +22,8 @@ public class EdgeLineModelUndirected {
     public static final int TARGET_COLOR_FLOATS = SOURCE_COLOR_FLOATS;
     public static final int COLOR_FLOATS = 1;
     public static final int SIZE_FLOATS = 1;
+    public static final int SOURCE_SIZE_FLOATS = 1;
+    public static final int TARGET_SIZE_FLOATS = 1;
 
     public static final int TOTAL_ATTRIBUTES_FLOATS
         = POSITION_SOURCE_FLOATS
@@ -29,7 +31,9 @@ public class EdgeLineModelUndirected {
         + SOURCE_COLOR_FLOATS
         + TARGET_COLOR_FLOATS
         + COLOR_FLOATS
-        + SIZE_FLOATS;
+        + SIZE_FLOATS
+        + SOURCE_SIZE_FLOATS
+        + TARGET_SIZE_FLOATS;
 
     private static final int VERTEX_PER_TRIANGLE = 3;
 
@@ -69,6 +73,8 @@ private void initProgram(GL2ES2 gl) {
             .addAttribLocation(ATTRIB_NAME_SOURCE_COLOR, SHADER_SOURCE_COLOR_LOCATION)
             .addAttribLocation(ATTRIB_NAME_TARGET_COLOR, SHADER_TARGET_COLOR_LOCATION)
             .addAttribLocation(ATTRIB_NAME_COLOR, SHADER_COLOR_LOCATION)
+            .addAttribLocation(ATTRIB_NAME_SOURCE_SIZE, SHADER_SOURCE_SIZE_LOCATION)
+            .addAttribLocation(ATTRIB_NAME_TARGET_SIZE, SHADER_TARGET_SIZE_LOCATION)
             .init(gl);
 
         programWithSelectionSelected = new GLShaderProgram(SHADERS_ROOT, SHADERS_EDGE_LINE_SOURCE_WITH_SELECTION_SELECTED, SHADERS_EDGE_LINE_SOURCE)
@@ -86,6 +92,8 @@ private void initProgram(GL2ES2 gl) {
             .addAttribLocation(ATTRIB_NAME_SOURCE_COLOR, SHADER_SOURCE_COLOR_LOCATION)
             .addAttribLocation(ATTRIB_NAME_TARGET_COLOR, SHADER_TARGET_COLOR_LOCATION)
             .addAttribLocation(ATTRIB_NAME_COLOR, SHADER_COLOR_LOCATION)
+            .addAttribLocation(ATTRIB_NAME_SOURCE_SIZE, SHADER_SOURCE_SIZE_LOCATION)
+            .addAttribLocation(ATTRIB_NAME_TARGET_SIZE, SHADER_TARGET_SIZE_LOCATION)
             .init(gl);
 
         programWithSelectionUnselected = new GLShaderProgram(SHADERS_ROOT, SHADERS_EDGE_LINE_SOURCE_WITH_SELECTION_UNSELECTED, SHADERS_EDGE_LINE_SOURCE)
@@ -103,6 +111,8 @@ private void initProgram(GL2ES2 gl) {
             .addAttribLocation(ATTRIB_NAME_SOURCE_COLOR, SHADER_SOURCE_COLOR_LOCATION)
             .addAttribLocation(ATTRIB_NAME_TARGET_COLOR, SHADER_TARGET_COLOR_LOCATION)
             .addAttribLocation(ATTRIB_NAME_COLOR, SHADER_COLOR_LOCATION)
+            .addAttribLocation(ATTRIB_NAME_SOURCE_SIZE, SHADER_SOURCE_SIZE_LOCATION)
+            .addAttribLocation(ATTRIB_NAME_TARGET_SIZE, SHADER_TARGET_SIZE_LOCATION)
             .init(gl);
     }
 
diff --git a/modules/opengl-jogl/src/main/java/org/gephi/viz/engine/jogl/pipeline/common/AbstractEdgeData.java b/modules/opengl-jogl/src/main/java/org/gephi/viz/engine/jogl/pipeline/common/AbstractEdgeData.java
index 168727d..abe888d 100644
--- a/modules/opengl-jogl/src/main/java/org/gephi/viz/engine/jogl/pipeline/common/AbstractEdgeData.java
+++ b/modules/opengl-jogl/src/main/java/org/gephi/viz/engine/jogl/pipeline/common/AbstractEdgeData.java
@@ -569,6 +569,10 @@ protected void fillUndirectedEdgeAttributesDataWithoutSelection(final float[] bu
         fillUndirectedEdgeAttributesDataBase(buffer, edge, index);
 
         buffer[index + 7] = Float.intBitsToFloat(edge.getRGBA());//Color
+
+        //Source and target size:
+        buffer[index + 8] = edge.getSource().size();
+        buffer[index + 9] = edge.getTarget().size();
     }
 
     protected void fillUndirectedEdgeAttributesDataWithSelection(final float[] buffer, final Edge edge, final int index, final boolean selected) {
@@ -606,6 +610,10 @@ protected void fillUndirectedEdgeAttributesDataWithSelection(final float[] buffe
         } else {
             buffer[index + 7] = Float.intBitsToFloat(edge.getRGBA());//Color
         }
+
+        //Source and target size:
+        buffer[index + 8] = edge.getSource().size();
+        buffer[index + 9] = edge.getTarget().size();
     }
 
     protected void fillDirectedEdgeAttributesDataBase(final float[] buffer, final Edge edge, final int index) {
@@ -638,8 +646,9 @@ protected void fillDirectedEdgeAttributesDataWithoutSelection(final float[] buff
         //Color:
         buffer[index + 6] = Float.intBitsToFloat(edge.getRGBA());//Color
 
-        //Target size:
-        buffer[index + 7] = edge.getTarget().size();
+        //Source and target size:
+        buffer[index + 7] = edge.getSource().size();
+        buffer[index + 8] = edge.getTarget().size();
     }
 
     protected void fillDirectedEdgeAttributesDataWithSelection(final float[] buffer, final Edge edge, final int index, final boolean selected) {
@@ -678,8 +687,9 @@ protected void fillDirectedEdgeAttributesDataWithSelection(final float[] buffer,
             buffer[index + 6] = Float.intBitsToFloat(edge.getRGBA());//Color
         }
 
-        //Target size:
-        buffer[index + 7] = target.size();
+        //Source and target size:
+        buffer[index + 7] = source.size();
+        buffer[index + 8] = target.size();
     }
 
     private UndirectedEdgesVAO undirectedEdgesVAO;
@@ -820,6 +830,12 @@ protected void configure(GL2ES2 gl) {
                 offset += EdgeLineModelUndirected.TARGET_COLOR_FLOATS * Float.BYTES;
 
                 gl.glVertexAttribPointer(SHADER_COLOR_LOCATION, EdgeLineModelUndirected.COLOR_FLOATS * Float.BYTES, GL_UNSIGNED_BYTE, false, stride, offset);
+                offset += EdgeLineModelUndirected.COLOR_FLOATS * Float.BYTES;
+
+                gl.glVertexAttribPointer(SHADER_SOURCE_SIZE_LOCATION, EdgeLineModelDirected.SOURCE_SIZE_FLOATS, GL_FLOAT, false, stride, offset);
+                offset += EdgeLineModelDirected.SOURCE_SIZE_FLOATS * Float.BYTES;
+
+                gl.glVertexAttribPointer(SHADER_TARGET_SIZE_LOCATION, EdgeLineModelDirected.TARGET_SIZE_FLOATS, GL_FLOAT, false, stride, offset);
             }
             attributesBuffer.unbind(gl);
         }
@@ -833,7 +849,9 @@ protected int[] getUsedAttributeLocations() {
                 SHADER_SIZE_LOCATION,
                 SHADER_SOURCE_COLOR_LOCATION,
                 SHADER_TARGET_COLOR_LOCATION,
-                SHADER_COLOR_LOCATION
+                SHADER_COLOR_LOCATION,
+                SHADER_SOURCE_SIZE_LOCATION,
+                SHADER_TARGET_SIZE_LOCATION
             };
         }
 
@@ -846,7 +864,9 @@ protected int[] getInstancedAttributeLocations() {
                     SHADER_SIZE_LOCATION,
                     SHADER_SOURCE_COLOR_LOCATION,
                     SHADER_TARGET_COLOR_LOCATION,
-                    SHADER_COLOR_LOCATION
+                    SHADER_COLOR_LOCATION,
+                    SHADER_SOURCE_SIZE_LOCATION,
+                    SHADER_TARGET_SIZE_LOCATION
                 };
             } else {
                 return null;
@@ -891,6 +911,9 @@ protected void configure(GL2ES2 gl) {
                 gl.glVertexAttribPointer(SHADER_COLOR_LOCATION, EdgeLineModelDirected.COLOR_FLOATS * Float.BYTES, GL_UNSIGNED_BYTE, false, stride, offset);
                 offset += EdgeLineModelDirected.COLOR_FLOATS * Float.BYTES;
 
+                gl.glVertexAttribPointer(SHADER_SOURCE_SIZE_LOCATION, EdgeLineModelDirected.SOURCE_SIZE_FLOATS, GL_FLOAT, false, stride, offset);
+                offset += EdgeLineModelDirected.SOURCE_SIZE_FLOATS * Float.BYTES;
+
                 gl.glVertexAttribPointer(SHADER_TARGET_SIZE_LOCATION, EdgeLineModelDirected.TARGET_SIZE_FLOATS, GL_FLOAT, false, stride, offset);
             }
             attributesBuffer.unbind(gl);
@@ -905,6 +928,7 @@ protected int[] getUsedAttributeLocations() {
                 SHADER_SIZE_LOCATION,
                 SHADER_SOURCE_COLOR_LOCATION,
                 SHADER_COLOR_LOCATION,
+                SHADER_SOURCE_SIZE_LOCATION,
                 SHADER_TARGET_SIZE_LOCATION
             };
         }
@@ -918,6 +942,7 @@ protected int[] getInstancedAttributeLocations() {
                     SHADER_SIZE_LOCATION,
                     SHADER_SOURCE_COLOR_LOCATION,
                     SHADER_COLOR_LOCATION,
+                    SHADER_SOURCE_SIZE_LOCATION,
                     SHADER_TARGET_SIZE_LOCATION
                 };
             } else {