Interactions

src/substance_display.gd

@@ -0,0 +1,46 @@
+extends MeshInstance3D
+
+enum DisplayType{
+	Fluid,
+	Solid,
+}
+
+@export var display_type: DisplayType
+
+func update_material(substances: Array[RuntimeSubstanceData]) -> void:
+	var mat: StandardMaterial3D = material_override
+	if len(substances) == 0:
+		visible = false
+		return
+	else:
+		visible = true
+		
+	var total_weight = 0
+
+	for sub in substances:
+		total_weight += sub.amount
+	
+	var alpha: float = 0
+	var color: Color = Color.WHITE
+	
+	for sub in substances:
+		if display_type == DisplayType.Fluid:
+			alpha += sub.substance.liquid_transparency
+		color = color.lerp(sub.substance.color,sub.amount/total_weight)
+	if display_type == DisplayType.Fluid:
+		alpha /= len(substances)
+		color.a = alpha
+	
+	mat.albedo_color = color
+
+func update_material_unfiltered(substances: Array[RuntimeSubstanceData]):
+	match display_type:
+		DisplayType.Fluid:
+			var fluids = substances.filter(filter_liquids)
+			update_material(fluids)
+		DisplayType.Solid:
+			var solids = substances.filter(filter_solids)
+			update_material(solids)
+
+func filter_liquids(sub: RuntimeSubstanceData): return sub.substance.melting_point < sub.temperature or sub.substance.is_solution
+func filter_solids(sub: RuntimeSubstanceData): return sub.substance.melting_point > sub.temperature and not sub.substance.is_solution