added directional blur

effects/boxblur.frag

@@ -46,6 +46,6 @@ void main(void) {
 					gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x, gl_FragCoord.y+i))/resolution)*(divider);
 				}
 			}
-		}		
-	}	
+		}
+	}
 }

effects/directionalblur.frag

@@ -0,0 +1,26 @@
+#version 110
+
+#define M_PI 3.1415926535897932384626433832795
+
+uniform sampler2D image;
+
+uniform float angle;
+uniform float length;
+
+uniform vec2 resolution;
+
+void main(void) {
+	float degrees = (angle*M_PI)/180.0;
+	float divider = 1.0 / ((length*2.0)+1.0);
+	float sin_angle = sin(degrees);
+	float cos_angle = cos(degrees);
+
+	gl_FragColor = texture2D(image, gl_FragCoord.xy/resolution)*(divider);
+	for (float i=1.0;i<=length;i++) {
+		float y = sin_angle * i;
+		float x = cos_angle * i;
+
+		gl_FragColor += texture2D(image, vec2(gl_FragCoord.x-x, gl_FragCoord.y-y)/resolution)*(divider);
+		gl_FragColor += texture2D(image, vec2(gl_FragCoord.x+x, gl_FragCoord.y+y)/resolution)*(divider);
+	}
+}

effects/directionalblur.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<effect name="Directional Blur" category="Blur">
+	<row name="Length">
+		<field type="double" min="0" default="10" id="length"/>
+	</row>
+	<row name="Angle">
+		<field type="double" default="0" id="angle"/>
+	</row>
+	<shader vert="common.vert" frag="directionalblur.frag"/>
+</effect>