Reset models and rotation modes when leaving the world.

fixes #1173
should fix #1167

src/assets.zig

@@ -498,6 +498,8 @@ pub fn unloadAssets() void { // MARK: unloadAssets()
 	items_zig.reset();
 	biomes_zig.reset();
 	migrations_zig.reset();
+	main.models.reset();
+	main.rotation.reset();
 
 	// Remove paths from asset hot reloading:
 	var dir = std.fs.cwd().openDir("assets", .{.iterate = true}) catch |err| {

src/models.zig

@@ -552,9 +552,13 @@ pub fn init() void {
 	nameToIndex.put("none", Model.init(&.{})) catch unreachable;
 }
 
-pub fn uploadModels() void {
+pub fn reset() void {
-	quadSSBO = graphics.SSBO.initStatic(QuadInfo, quads.items);
+	models.clearRetainingCapacity();
-	quadSSBO.bind(4);
+	quads.clearRetainingCapacity();
+	extraQuadInfos.clearRetainingCapacity();
+	quadDeduplication.clearRetainingCapacity();
+	nameToIndex.clearRetainingCapacity();
+	nameToIndex.put("none", Model.init(&.{})) catch unreachable;
 }
 
 pub fn deinit() void {
@@ -568,3 +572,8 @@ pub fn deinit() void {
 	extraQuadInfos.deinit();
 	quadDeduplication.deinit();
 }
+
+pub fn uploadModels() void {
+	quadSSBO = graphics.SSBO.initStatic(QuadInfo, quads.items);
+	quadSSBO.bind(4);
+}

src/rotation.zig

@@ -144,6 +144,7 @@ pub const RotationModes = struct {
 		pub const id: []const u8 = "no_rotation";
 		fn init() void {}
 		fn deinit() void {}
+		fn reset() void {}
 	};
 	pub const Log = struct { // MARK: Log
 		pub const id: []const u8 = "log";
@@ -157,6 +158,10 @@ pub const RotationModes = struct {
 			rotatedModels.deinit();
 		}
 
+		fn reset() void {
+			rotatedModels.clearRetainingCapacity();
+		}
+
 		pub fn createBlockModel(zon: ZonElement) u16 {
 			const modelId = zon.as([]const u8, "cubyz:cube");
 			if(rotatedModels.get(modelId)) |modelIndex| return modelIndex;
@@ -198,6 +203,10 @@ pub const RotationModes = struct {
 			rotatedModels.deinit();
 		}
 
+		fn reset() void {
+			rotatedModels.clearRetainingCapacity();
+		}
+
 		pub fn createBlockModel(zon: ZonElement) u16 {
 			const modelId = zon.as([]const u8, "cubyz:cube");
 			if(rotatedModels.get(modelId)) |modelIndex| return modelIndex;
@@ -250,6 +259,10 @@ pub const RotationModes = struct {
 			fenceModels.deinit();
 		}
 
+		fn reset() void {
+			fenceModels.clearRetainingCapacity();
+		}
+
 		fn fenceTransform(quad: *main.models.QuadInfo, data: FenceData) void {
 			for(&quad.corners, &quad.cornerUV) |*corner, *cornerUV| {
 				if(!data.isConnectedNegX and corner[0] == 0) {
@@ -357,6 +370,10 @@ pub const RotationModes = struct {
 			branchModels.deinit();
 		}
 
+		fn reset() void {
+			branchModels.clearRetainingCapacity();
+		}
+
 		fn branchTransform(quad: *main.models.QuadInfo, data: BranchData) void {
 			for(&quad.corners) |*corner| {
 				if((!data.isConnected(Neighbor.dirNegX) and corner[0] == 0) or
@@ -497,10 +514,11 @@ pub const RotationModes = struct {
 			return stairData & subBlockMask(x, y, z) == 0;
 		}
 
-		fn init() void {
+		fn init() void {}
+		fn deinit() void {}
+		fn reset() void {
 			modelIndex = 0;
 		}
-		fn deinit() void {}
 
 		const GreedyFaceInfo = struct {min: Vec2f, max: Vec2f};
 		fn mergeFaces(faceVisible: [2][2]bool, mem: []GreedyFaceInfo) []GreedyFaceInfo {
@@ -807,6 +825,10 @@ pub const RotationModes = struct {
 			rotatedModels.deinit();
 		}
 
+		fn reset() void {
+			rotatedModels.clearRetainingCapacity();
+		}
+
 		pub fn createBlockModel(zon: ZonElement) u16 {
 			const baseModelId: []const u8 = zon.get([]const u8, "base", "cubyz:cube");
 			const sideModelId: []const u8 = zon.get([]const u8, "side", "cubyz:cube");
@@ -980,6 +1002,10 @@ pub const RotationModes = struct {
 			rotatedModels.deinit();
 		}
 
+		fn reset() void {
+			rotatedModels.clearRetainingCapacity();
+		}
+
 		pub fn createBlockModel(zon: ZonElement) u16 {
 			const modelId = zon.as([]const u8, "cubyz:cube");
 			if(rotatedModels.get(modelId)) |modelIndex| return modelIndex;
@@ -1105,6 +1131,9 @@ pub const RotationModes = struct {
 
 		fn init() void {}
 		fn deinit() void {}
+		fn reset() void {
+			modelCache = null;
+		}
 
 		pub fn createBlockModel(zon: ZonElement) u16 {
 			const modelId = zon.as([]const u8, "cubyz:cube");
@@ -1168,6 +1197,12 @@ pub fn init() void {
 	}
 }
 
+pub fn reset() void {
+	inline for(@typeInfo(RotationModes).@"struct".decls) |declaration| {
+		@field(RotationModes, declaration.name).reset();
+	}
+}
+
 pub fn deinit() void {
 	rotationModes.deinit();
 	inline for(@typeInfo(RotationModes).@"struct".decls) |declaration| {