Low Poly Precision Outline Shader (Mobile, Web, Desktop)

Full Shader @ https://sol-vin.itch.io/low-poly-pos

Draws precision outlines using precomputed surface maps. 

Requires a screen space quad, as well as a pre-computed material which can be made using the support scripts at the website.

Shader code

shader_type spatial;
render_mode depth_prepass_alpha, cull_disabled, ambient_light_disabled, specular_disabled, specular_occlusion_disabled;

#include "res://addons/outline_shader/shaders/colors.gdshaderinc"

void fragment() {

	float polygon_color_id = pack_color_id(floor(UV2.y/float(TOTAL_COLORS+2u)));
	float outline_color_id = pack_color_id(round(mod(UV2.y, float(TOTAL_COLORS+2u))));
	
	float surface_id = UV2.x + dot(NODE_POSITION_WORLD, vec3(0.37, 0.11, 0.23));
	
	#if CURRENT_RENDERER == RENDERER_COMPATIBILITY
	    vec3 color = linear_to_srgb(vec3(mod(surface_id, 0.9)+0.05, polygon_color_id, outline_color_id));
	#elif CURRENT_RENDERER == RENDERER_MOBILE || CURRENT_RENDERER == RENDERER_FORWARD_PLUS
	    vec3 color = vec3(mod(surface_id, 0.9)+0.05, polygon_color_id, outline_color_id);
	#endif
	EMISSION = color;
	ALBEDO = color;
	//ALPHA = 1.0;
}

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