auto_shader.glsl

// Copyright © 2023 Cory Petkovsek, Roope Palmroos, and Contributors.

R"(

//INSERT: AUTO_SHADER_UNIFORMS
uniform float auto_slope : hint_range(0,10) = 1.0;
uniform float auto_height_reduction : hint_range(0, 1) = 0.1;
uniform int auto_base_texture : hint_range(0,31) = 0;
uniform int auto_overlay_texture : hint_range(0,31) = 1;

//INSERT: AUTO_SHADER_TEXTURE_ID
	// Enable Autoshader if outside regions or painted in regions, otherwise manual painted
	bool auto_shader = region<0 || bool(control & 0x1u);
	out_mat.base = int(auto_shader)*auto_base_texture + int(!auto_shader)*int(control >>27u & 0x1Fu);
	out_mat.over = int(auto_shader)*auto_overlay_texture + int(!auto_shader)*int(control >> 22u & 0x1Fu);
	out_mat.blend = float(auto_shader)*clamp(
			dot(vec3(0., 1., 0.), normal * auto_slope*2. - (auto_slope*2.-1.)) 
			- auto_height_reduction*.01*v_vertex.y // Reduce as vertices get higher
			, 0., 1.) + 
			 float(!auto_shader)*float(control >>14u & 0xFFu) * 0.003921568627450; // 1./255.0		

//INSERT: TEXTURE_ID
	out_mat.base = int(control >>27u & 0x1Fu);
	out_mat.over = int(control >> 22u & 0x1Fu);
	out_mat.blend = float(control >>14u & 0xFFu) * 0.003921568627450; // 1./255.0

)"