new battery model with shaders

Shaders/battery_glass.gdshader

@@ -0,0 +1,17 @@
+shader_type spatial;
+uniform sampler2D normal;
+uniform sampler2D color;
+void vertex() {
+	// Called for every vertex the material is visible on.
+}
+
+void fragment() {
+	ALBEDO = vec3(0.1,0.1,0.1);
+	NORMAL = texture(normal,UV).rgb;
+	ALPHA = 0.4;
+}
+
+//void light() {
+//	// Called for every pixel for every light affecting the material.
+//	// Uncomment to replace the default light processing function with this one.
+//}