Shield wave

shaders/shield.gdshader

@@ -0,0 +1,50 @@
+shader_type canvas_item;
+
+uniform vec2[10] wave_centers;
+uniform float[10] wave_distances;
+
+uniform vec3 color : source_color;
+uniform float max_distance;
+uniform float bublic_size = 2.0;
+
+varying vec2[10] local_position;
+
+float smooth_bublic(vec2 center,vec2 pixel_pos,float distance_from_center,float size)
+{
+	return 1.0-distance(distance_from_center,distance(center,pixel_pos))/size;
+}
+
+float solid_bublic(vec2 center,vec2 pixel_pos,float distance_from_center,float size,float border)
+{
+
+	return step(border,smooth_bublic(center,pixel_pos,distance_from_center,size));;
+}
+
+void vertex()
+{
+	for (int i = 0; i < wave_centers.length(); i++)
+	{
+		local_position[i] = (inverse(MODEL_MATRIX) * vec4(wave_centers[i],0.0,1.0)).xy;
+	}
+}
+
+void fragment() {
+	for (int i = 0; i < wave_centers.length(); i++)
+	{
+		float wave_distance = wave_distances[i];
+		float normalized_distance = wave_distance/max_distance;
+		
+		if (normalized_distance >= 1.0 || normalized_distance < 0.0)
+		{
+			break;
+		}
+		float bublic = solid_bublic(local_position[i],(UV-0.5)/TEXTURE_PIXEL_SIZE,wave_distance,bublic_size,0.75);
+		
+		if (bublic == 0.0){
+			break;
+		}
+		
+		COLOR.rgb = mix(COLOR.rgb,vec3(bublic*color),1.0-normalized_distance);
+		
+	}
+}