Added water shader

client/world/grass/Grass.gdshader

@@ -0,0 +1,36 @@
+shader_type spatial;
+render_mode cull_disabled;
+render_mode diffuse_lambert_wrap;
+//render_mode diffuse_lambert;
+//render_mode diffuse_burley;
+//render_mode diffuse_toon;
+//render_mode unshaded;
+
+uniform vec3 color_bottom : source_color;
+uniform vec3 color_top : source_color;
+uniform vec3 wind = vec3(0.1, 0.0, 0.1);
+uniform vec3 wind_speed = vec3(1.0, 0.0, 1.0);
+
+void vertex() {
+	float distance_to_ground = 1.0 - UV.y;
+
+	vec4 sway = vec4(
+		sin(NODE_POSITION_WORLD.x + TIME * wind_speed.x) * distance_to_ground * wind.x,
+		0.0,
+		cos(NODE_POSITION_WORLD.z + TIME * wind_speed.z) * distance_to_ground * wind.z,
+		1.0
+	);
+
+	VERTEX += (sway * MODEL_MATRIX).xyz;
+}
+
+void fragment() {
+	ALBEDO = mix(color_top, color_bottom, UV.y);
+	NORMAL = vec3(0.0, 1.0, 0.0);
+	
+	//if (!FRONT_FACING) {
+		//NORMAL = -NORMAL;
+	//}
+	
+	//ALPHA = 1.0 - UV.y * UV.y;
+}