initial shit

addons/ninetailsrabbit.terrainy/shaders/terrain/texture_uv_rotation.gdshader

@@ -0,0 +1,52 @@
+shader_type spatial;
+render_mode blend_mix, depth_draw_opaque, cull_back, diffuse_burley, specular_schlick_ggx;
+
+uniform sampler2D albedo_texture : source_color, repeat_enable, filter_linear_mipmap;
+uniform sampler2D albedo_seam : source_color, repeat_enable, filter_linear_mipmap;
+
+uniform float uv_scale = 1.0;
+uniform vec2 pivot_point = vec2(0.500000, 0.500000);
+
+// Noise type should be "cellular", fractal type "none" and return type "cell_value"
+uniform sampler2D rotation_noise : source_color;
+
+// This Noise type should be exactly the same as the rotation noise except for return type as "distance2sub"
+// When changing any parameter of the rotation noise, the seam mending noise must be updated too
+// The color ramp needs to be from white(left) and black(right) so the seams can be hidden.
+uniform sampler2D seam_mending_noise : source_color;
+
+
+void fragment() {
+	vec2 albedo_uv = UV * vec2(uv_scale);
+
+	float rotation_degrees;
+	
+	// Remap noise value [0, 1] to degrees [0, 360]
+	float input_min_value = 0.00000;
+	float input_max_value = 1.00000;
+	float output_min_value = 0.00000;
+	float output_max_value = 360.00000;
+	{
+		float __input_range = input_max_value - input_min_value;
+		float __output_range = output_max_value - output_min_value;
+		rotation_degrees = output_min_value + __output_range * ((texture(rotation_noise, UV).x - input_min_value) / __input_range);
+	}
+
+	vec2 final_albedo;
+	
+// Expression:7
+	final_albedo = vec2(0.0, 0.0);
+	{
+		albedo_uv -= pivot_point;
+		float rotation_radians = radians(rotation_degrees);
+		float c = cos(rotation_radians);
+		float s = sin(rotation_radians);
+		
+		final_albedo.x = albedo_uv.x * c + albedo_uv.y * s;
+		final_albedo.y = albedo_uv.y * c - albedo_uv.x * s;
+		
+		final_albedo += pivot_point;
+	}
+
+	ALBEDO =  mix(vec3(texture(albedo_seam, final_albedo).xyz), vec3(texture(albedo_texture, albedo_uv).xyz), vec3(texture(seam_mending_noise, UV).xyz));
+}