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Shaders/Water2.gdshader

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+shader_type spatial;
+render_mode blend_mix, depth_draw_always; 
+
+// --- PARAMETRI COLORI ACQUA ---
+uniform vec4 deep_water_color : source_color = vec4(0.0, 0.1, 0.2, 1.0);
+uniform vec4 shallow_water_color : source_color = vec4(0.0, 0.4, 0.7, 1.0);
+uniform float beer_law_factor : hint_range(0.0, 5.0) = 2.0; 
+
+// --- PARAMETRI SCHIUMA (DIVISI) ---
+uniform vec4 shore_foam_color : source_color = vec4(1.0, 1.0, 1.0, 1.0); // Schiuma che tocca gli oggetti
+uniform vec4 crest_foam_color : source_color = vec4(0.9, 0.95, 1.0, 1.0); // Schiuma sulle punte delle onde
+uniform float shore_foam_distance : hint_range(0.0, 5.0) = 0.5; // Slider aumentato a 5.0
+
+// --- PARAMETRI ONDE 3D ---
+uniform float wave_rotation : hint_range(0.0, 6.28) = 0.0;
+uniform float wave_height : hint_range(0.0, 2.0) = 0.4;
+uniform float wave_frequency = 4.0;
+uniform float wave_speed = 2.0;
+uniform float wave_distortion : hint_range(0.0, 2.0) = 0.5;
+
+// --- PARAMETRI NOISE E DEPTH ---
+uniform sampler2D noise_texture : hint_default_white;
+uniform sampler2D depth_texture : hint_depth_texture, filter_linear_mipmap;
+
+varying float height_varying;
+varying vec2 world_pos;
+
+void vertex() {
+	world_pos = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xz;
+	
+	// 1. ROTAZIONE
+	vec2 rotated_pos = vec2(
+		world_pos.x * cos(wave_rotation) - world_pos.y * sin(wave_rotation),
+		world_pos.x * sin(wave_rotation) + world_pos.y * cos(wave_rotation)
+	);
+	
+	// 2. CALCOLO ONDA
+	float noise = texture(noise_texture, world_pos * 0.05 + TIME * 0.02).r;
+	float wave = sin(rotated_pos.y * wave_frequency + TIME * wave_speed + (noise * wave_distortion * 5.0));
+	
+	height_varying = (wave + 1.0) * 0.5; 
+	VERTEX.y += wave * wave_height;
+}
+
+void fragment() {
+	// --- LOGICA PROFONDITÀ ---
+	float depth = texture(depth_texture, SCREEN_UV).r;
+	vec3 ndc = vec3(SCREEN_UV * 2.0 - 1.0, depth);
+	vec4 view = INV_PROJECTION_MATRIX * vec4(ndc, 1.0);
+	view.xyz /= view.w;
+	float linear_depth = -view.z;
+	float depth_difference = linear_depth + VERTEX.z;
+
+	float water_depth_gradient = exp(-depth_difference * beer_law_factor);
+	vec4 base_water = mix(deep_water_color, shallow_water_color, water_depth_gradient);
+
+	// --- GRADIENTE CRESTE ---
+	float crest_blend = smoothstep(0.4, 0.9, height_varying);
+	vec4 water_with_crests = mix(base_water, shallow_water_color * 1.3, crest_blend);
+
+	// --- CALCOLO SCHIUMA SEPARATA ---
+	float noise_f = texture(noise_texture, world_pos * 0.1 + TIME * 0.1).r;
+	
+	// 1. Schiuma a riva (Shoreline)
+	float edge_foam_mask = smoothstep(shore_foam_distance * noise_f + 0.1, shore_foam_distance * noise_f, depth_difference);
+	
+	// 2. Schiuma sulla cresta (Waves)
+	float crest_foam_mask = smoothstep(0.8, 0.95, height_varying) * 0.8;
+
+	// --- MIX FINALE DEI COLORI ---
+	// Applichiamo prima la schiuma delle onde
+	vec3 color_with_waves = mix(water_with_crests.rgb, crest_foam_color.rgb, crest_foam_mask);
+	
+	// Poi applichiamo la schiuma di riva sopra a tutto
+	vec3 final_rgb = mix(color_with_waves, shore_foam_color.rgb, edge_foam_mask);
+
+	// --- OUTPUT ---
+	ALBEDO = final_rgb;
+	ALPHA = mix(0.98, 0.4, water_depth_gradient);
+	
+	// Aggiungiamo un po' di opacità extra dove c'è la schiuma di riva
+	ALPHA = clamp(ALPHA + edge_foam_mask, 0.0, 1.0);
+
+	ROUGHNESS = 0.2;
+	SPECULAR = 0.5;
+}