Improve production cockpit realism

game/presentation/cockpit/cockpit_material_palette.gd

@@ -0,0 +1,120 @@
+class_name CockpitMaterialPalette
+extends RefCounted
+
+var painted_steel: Material
+var dark_steel: Material
+var brass: Material
+var copper: Material
+var rubber: Material
+var ivory: Material
+var warm_emission: StandardMaterial3D
+var red_emission: StandardMaterial3D
+
+
+func _init() -> void:
+	painted_steel = _weathered_material(
+		Color(0.045, 0.12, 0.125),
+		Color(0.16, 0.18, 0.17),
+		0.52,
+		0.58,
+		0.13
+	)
+	dark_steel = _weathered_material(
+		Color(0.045, 0.055, 0.055),
+		Color(0.22, 0.24, 0.22),
+		0.78,
+		0.44,
+		0.08
+	)
+	brass = _weathered_material(
+		Color(0.28, 0.18, 0.045),
+		Color(0.08, 0.16, 0.13),
+		0.74,
+		0.38,
+		0.17
+	)
+	copper = _weathered_material(
+		Color(0.34, 0.12, 0.045),
+		Color(0.055, 0.18, 0.15),
+		0.72,
+		0.42,
+		0.12
+	)
+	rubber = _plain_material(Color(0.012, 0.018, 0.018), 0.0, 0.92)
+	ivory = _plain_material(Color(0.72, 0.69, 0.56), 0.05, 0.63)
+	warm_emission = _emissive_material(Color(0.96, 0.52, 0.18), 2.4)
+	red_emission = _emissive_material(Color(0.92, 0.055, 0.025), 3.6)
+
+
+func _weathered_material(
+	base_color: Color,
+	worn_color: Color,
+	metallic: float,
+	roughness: float,
+	wear_amount: float
+) -> ShaderMaterial:
+	var shader := Shader.new()
+	shader.code = """
+shader_type spatial;
+render_mode diffuse_burley, specular_schlick_ggx;
+
+uniform vec4 base_color : source_color;
+uniform vec4 worn_color : source_color;
+uniform float metallic_value : hint_range(0.0, 1.0);
+uniform float roughness_value : hint_range(0.0, 1.0);
+uniform float wear_amount : hint_range(0.0, 0.4);
+
+float hash21(vec2 p) {
+	return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453123);
+}
+
+float value_noise(vec2 p) {
+	vec2 cell = floor(p);
+	vec2 local = fract(p);
+	local = local * local * (3.0 - 2.0 * local);
+	float a = hash21(cell);
+	float b = hash21(cell + vec2(1.0, 0.0));
+	float c = hash21(cell + vec2(0.0, 1.0));
+	float d = hash21(cell + vec2(1.0, 1.0));
+	return mix(mix(a, b, local.x), mix(c, d, local.x), local.y);
+}
+
+void fragment() {
+	float broad = value_noise(UV * 11.0);
+	float grain = value_noise(UV * 73.0 + vec2(4.2, 8.7));
+	float wear = smoothstep(0.76, 1.0, broad) * wear_amount;
+	ALBEDO = mix(base_color.rgb * mix(0.78, 1.08, broad), worn_color.rgb, wear);
+	METALLIC = metallic_value;
+	ROUGHNESS = clamp(roughness_value + (grain - 0.5) * 0.22, 0.16, 0.96);
+}
+"""
+	var material := ShaderMaterial.new()
+	material.shader = shader
+	material.set_shader_parameter("base_color", base_color)
+	material.set_shader_parameter("worn_color", worn_color)
+	material.set_shader_parameter("metallic_value", metallic)
+	material.set_shader_parameter("roughness_value", roughness)
+	material.set_shader_parameter("wear_amount", wear_amount)
+	return material
+
+
+func _plain_material(
+	color: Color,
+	metallic: float,
+	roughness: float
+) -> StandardMaterial3D:
+	var material := StandardMaterial3D.new()
+	material.albedo_color = color
+	material.metallic = metallic
+	material.roughness = roughness
+	return material
+
+
+func _emissive_material(color: Color, energy: float) -> StandardMaterial3D:
+	var material := StandardMaterial3D.new()
+	material.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
+	material.albedo_color = color
+	material.emission_enabled = true
+	material.emission = color
+	material.emission_energy_multiplier = energy
+	return material