Fixed pad shader/disconnect bugs

core/assets/shaders/blockpreview.fragment

@@ -32,7 +32,7 @@ void main() {
 	vec2 coord = t / v;
 	vec4 c = texture2D(u_texture, t);
 
-	if(cont(t, v) ){
+	if(cont(t, v)){
 		gl_FragColor = u_color;
 	}else{
 		gl_FragColor = vec4(0.0);

core/assets/shaders/build.fragment

@@ -3,6 +3,8 @@ precision mediump float;
 precision mediump int;
 #endif
 
+#define step 3.0
+
 uniform sampler2D u_texture;
 
 uniform float u_time;
@@ -15,27 +17,39 @@ uniform vec2 u_texsize;
 varying vec4 v_color;
 varying vec2 v_texCoord;
 
-float rand(vec2 co){
-    return fract(sin(dot(co.xy ,vec2(12.9898,78.233))) * 43758.5453);
-}
-
 bool id(vec4 v){
     return v.a > 0.1;
 }
 
+bool id(vec2 coords, vec4 base){
+    vec4 target = texture2D(u_texture, coords);
+    return  target.a < 0.1 || (coords.x < u_uv.x || coords.y < u_uv.y || coords.x > u_uv2.x || coords.y > u_uv2.y);
+}
+
+bool cont(vec2 T, vec2 v){
+    vec4 base = texture2D(u_texture, T);
+    return base.a > 0.1 &&
+           		(id(T + vec2(0, step) * v, base) || id(T + vec2(0, -step) * v, base) ||
+           		id(T + vec2(step, 0) * v, base) || id(T + vec2(-step, 0) * v, base) ||
+           		id(T + vec2(step, step) * v, base) || id(T + vec2(-step, -step) * v, base) ||
+                           		id(T + vec2(step, -step) * v, base) || id(T + vec2(-step, step) * v, base));
+}
+
 void main() {
     vec2 coords = (v_texCoord.xy - u_uv) / (u_uv2 - u_uv);
     vec2 t = v_texCoord.xy;
+    vec2 v = vec2(1.0/u_texsize.x, 1.0/u_texsize.y);
 
 	vec4 c = texture2D(u_texture, v_texCoord.xy);
-	
-    if(1.0-abs(coords.x - 0.5)*2.0 < 1.0-u_progress){
+	bool outl = cont(t, v);
+
+    if(1.0-abs(coords.x - 0.5)*2.0 < 1.0-u_progress && !outl){
         c = vec4(0.0);
     }
 
     if(c.a > 0.01){
         float f = abs(sin(coords.x*2.0 + u_time));
-        if(f > 0.9 )
+        if(f > 0.9 || outl)
             f = 1.0;
         else
             f = 0.0;