Shader cleanup

core/assets/shaders/shield.frag

@@ -0,0 +1,49 @@
+#ifdef GL_ES
+precision highp float;
+precision highp int;
+#endif
+
+#define MAX_HITS 64
+#define HIT_RADIUS 12.0
+#define ALPHA 0.18
+#define thickness 1.0
+#define step 2.0
+
+uniform sampler2D u_texture;
+uniform vec2 u_texsize;
+uniform float u_time;
+uniform float u_dp;
+uniform vec2 u_offset;
+
+varying vec4 v_color;
+varying vec2 v_texCoord;
+
+void main() {
+
+    vec2 T = v_texCoord.xy;
+    vec2 coords = (T * u_texsize) + u_offset;
+
+    T += vec2(sin(coords.y / 3.0 + u_time / 20.0), sin(coords.x / 3.0 + u_time / 20.0)) / u_texsize;
+    
+    float si = sin(u_time / 20.0) / 8.0;
+	vec4 color = texture2D(u_texture, T);
+	vec2 v = vec2(1.0/u_texsize.x, 1.0/u_texsize.y);
+
+	if(texture2D(u_texture, T).a < 0.1 &&
+       		(texture2D(u_texture, T + vec2(0, step) * v).a > 0.1 || texture2D(u_texture, T + vec2(0, -step) * v).a > 0.1 ||
+       		texture2D(u_texture, T + vec2(step, 0) * v).a > 0.1 || texture2D(u_texture, T + vec2(-step, 0) * v).a > 0.1)){
+
+		gl_FragColor = mix(v_color, vec4(1.0), si);
+	}else{
+
+	    if(color.a > 0.1){
+	        if(mod(coords.x / u_dp + coords.y / u_dp + sin(floor(coords.x / u_dp) / 5.0) * 3.0 + sin(floor(coords.y / u_dp) / 5.0) * 3.0  + u_time / 4.0, 10.0) < 2.0){
+	            color *= 1.65;
+	        }
+	        
+	        color.a = ALPHA;
+	    }
+		
+		gl_FragColor = color;
+	}
+}