moved essential resources out of the assets directory and into the jar

src/shaders/boxdown.frag

@@ -0,0 +1,31 @@
+#version 120
+#ifdef GL_ES
+    precision mediump float;
+#endif
+
+varying vec4 v_color;
+varying vec2 v_texCoords;
+uniform sampler2D u_texture;
+
+// recommended value: n / vec2(fbo_width, fbo_height) where n is something like {0.5, 1, 2, 4, ... }
+// that, or simply 0.5, depending on how your uv coord works
+uniform vec2 halfpixel = vec2(0.0, 0.0);
+
+vec2 doublex = vec2(2.0, 0.0);
+vec2 doubley = vec2(0.0, 2.0);
+vec2 twister = vec2(1.0, -1.0);
+vec2 boolean = vec2(1.0, 0.0);
+
+void main() {
+    vec4 sum = texture2D(u_texture, v_texCoords) +
+    texture2D(u_texture, v_texCoords + halfpixel) +
+    texture2D(u_texture, v_texCoords - halfpixel) +
+    texture2D(u_texture, v_texCoords + halfpixel * twister) +
+    texture2D(u_texture, v_texCoords - halfpixel * twister) +
+    texture2D(u_texture, v_texCoords + halfpixel * boolean.xy) +
+    texture2D(u_texture, v_texCoords - halfpixel * boolean.xy) +
+    texture2D(u_texture, v_texCoords + halfpixel * boolean.yx) +
+    texture2D(u_texture, v_texCoords - halfpixel * boolean.yx) ;
+
+    gl_FragColor = sum / 9.0;
+}