Struct PrefabPlacer

Source

pub struct PrefabPlacer { /* private fields */ }

Implementations§

Source §

impl PrefabPlacer

Source

pub fn new(config: PrefabConfig, library: PrefabLibrary) -> Self

Examples found in repository ?

examples/advanced_prefabs.rs (line 110)

10fn main() {
11    println!("=== Advanced Prefab System Demo ===\n");
12
13    // Step 1: Create prefab library programmatically
14    println!("1. Creating Prefab Library:");
15    let library = create_sample_library();
16
17    println!(
18        "   Created library with {} prefabs:",
19        library.get_prefabs().len()
20    );
21    for prefab in library.get_prefabs() {
22        println!(
23            "     - {} ({}x{}, weight: {:.1}, tags: {:?})",
24            prefab.name, prefab.width, prefab.height, prefab.weight, prefab.tags
25        );
26    }
27
28    // Step 2: Demonstrate weighted selection
29    println!("\n2. Weighted Selection Test:");
30    let mut rng = Rng::new(12345);
31    let mut selection_counts = std::collections::HashMap::new();
32
33    for _ in 0..100 {
34        if let Some(prefab) = library.select_weighted(&mut rng, None) {
35            *selection_counts.entry(prefab.name.clone()).or_insert(0) += 1;
36        }
37    }
38
39    println!("   Selection frequency (100 trials):");
40    for (name, count) in &selection_counts {
41        println!("     {}: {} times", name, count);
42    }
43
44    // Step 3: Tag-based selection
45    println!("\n3. Tag-based Selection:");
46    let room_prefabs = library.get_by_tag("room");
47    let corridor_prefabs = library.get_by_tag("corridor");
48
49    println!("   Room prefabs: {}", room_prefabs.len());
50    for prefab in &room_prefabs {
51        println!("     - {}", prefab.name);
52    }
53
54    println!("   Corridor prefabs: {}", corridor_prefabs.len());
55    for prefab in &corridor_prefabs {
56        println!("     - {}", prefab.name);
57    }
58
59    // Step 4: Transformation examples
60    println!("\n4. Prefab Transformations:");
61    if let Some(base_prefab) = library.get_prefabs().first() {
62        println!(
63            "   Base prefab '{}' ({}x{}):",
64            base_prefab.name, base_prefab.width, base_prefab.height
65        );
66        print_prefab_pattern(base_prefab);
67
68        // Rotation
69        let rotated = base_prefab.rotated();
70        println!(
71            "   After 90° rotation ({}x{}):",
72            rotated.width, rotated.height
73        );
74        print_prefab_pattern(&rotated);
75
76        // Horizontal mirror
77        let mirrored = base_prefab.mirrored_horizontal();
78        println!(
79            "   After horizontal mirror ({}x{}):",
80            mirrored.width, mirrored.height
81        );
82        print_prefab_pattern(&mirrored);
83
84        // Combined transformation
85        let transform = PrefabTransform {
86            rotation: 1,
87            mirror_h: true,
88            mirror_v: false,
89        };
90        let transformed = transform.apply(base_prefab);
91        println!(
92            "   After rotation + mirror ({}x{}):",
93            transformed.width, transformed.height
94        );
95        print_prefab_pattern(&transformed);
96    }
97
98    // Step 5: Generation with advanced prefabs
99    println!("\n5. Generation with Advanced Prefabs:");
100    let config = PrefabConfig {
101        max_prefabs: 5,
102        min_spacing: 3,
103        allow_rotation: true,
104        allow_mirroring: true,
105        weighted_selection: true,
106        placement_mode: terrain_forge::algorithms::PrefabPlacementMode::Overwrite,
107        tags: None,
108    };
109
110    let placer = PrefabPlacer::new(config, library.clone());
111    let mut grid = Grid::new(30, 25);
112    placer.generate(&mut grid, 54321);
113
114    let floor_count = grid.count(|t| t.is_floor());
115    println!(
116        "   Generated {}x{} grid with {} floor tiles",
117        grid.width(),
118        grid.height(),
119        floor_count
120    );
121
122    print_grid(&grid);
123
124    // Step 6: JSON serialization example
125    println!("\n6. JSON Serialization:");
126    match library.save_to_json("prefab_library.json") {
127        Ok(()) => {
128            println!("   ✅ Saved library to prefab_library.json");
129
130            // Try to load it back
131            match PrefabLibrary::load_from_json("prefab_library.json") {
132                Ok(loaded_library) => {
133                    println!("   ✅ Successfully loaded library back");
134                    println!("   Loaded {} prefabs", loaded_library.get_prefabs().len());
135                }
136                Err(e) => println!("   ❌ Failed to load: {}", e),
137            }
138        }
139        Err(e) => println!("   ❌ Failed to save: {}", e),
140    }
141
142    // Step 7: Performance comparison
143    println!("\n7. Performance Comparison:");
144
145    // Simple generation
146    let simple_config = PrefabConfig {
147        max_prefabs: 10,
148        min_spacing: 2,
149        allow_rotation: false,
150        allow_mirroring: false,
151        weighted_selection: false,
152        placement_mode: terrain_forge::algorithms::PrefabPlacementMode::Overwrite,
153        tags: None,
154    };
155
156    let start = std::time::Instant::now();
157    let simple_placer = PrefabPlacer::new(simple_config, library.clone());
158    let mut simple_grid = Grid::new(40, 30);
159    simple_placer.generate(&mut simple_grid, 98765);
160    let simple_time = start.elapsed();
161
162    // Advanced generation
163    let advanced_config = PrefabConfig {
164        max_prefabs: 10,
165        min_spacing: 2,
166        allow_rotation: true,
167        allow_mirroring: true,
168        weighted_selection: true,
169        placement_mode: terrain_forge::algorithms::PrefabPlacementMode::Overwrite,
170        tags: None,
171    };
172
173    let start = std::time::Instant::now();
174    let advanced_placer = PrefabPlacer::new(advanced_config, library);
175    let mut advanced_grid = Grid::new(40, 30);
176    advanced_placer.generate(&mut advanced_grid, 98765);
177    let advanced_time = start.elapsed();
178
179    println!("   Simple generation: {:?}", simple_time);
180    println!("   Advanced generation: {:?}", advanced_time);
181    println!(
182        "   Overhead: {:.1}x",
183        advanced_time.as_nanos() as f32 / simple_time.as_nanos() as f32
184    );
185
186    println!("\n✅ Advanced prefab system demo complete!");
187    println!("   - JSON serialization for persistent libraries");
188    println!("   - Weighted selection for balanced generation");
189    println!("   - Transformations for variety and reuse");
190    println!("   - Tag-based organization for targeted selection");
191}

More examples

Hide additional examples

examples/phase4_workflow.rs (line 121)

14fn main() {
15    println!("=== Phase 4 Complete Workflow Demo ===\n");
16
17    // Step 1: Generate base layout with BSP
18    println!("1. Generating Base Layout:");
19    let mut base_grid = Grid::new(35, 25);
20    let bsp = Bsp::default();
21    bsp.generate(&mut base_grid, 12345);
22
23    let base_floors = base_grid.count(|t| t.is_floor());
24    println!(
25        "   Generated {}x{} base layout with {} floors",
26        base_grid.width(),
27        base_grid.height(),
28        base_floors
29    );
30
31    // Step 2: Learn patterns from base layout
32    println!("\n2. Learning Patterns from Base Layout:");
33    let learned_patterns = WfcPatternExtractor::extract_patterns(&base_grid, 3);
34    println!(
35        "   Extracted {} unique 3x3 patterns",
36        learned_patterns.len()
37    );
38
39    // Step 3: Generate enhanced areas with WFC
40    println!("\n3. Generating Enhanced Areas with Learned Patterns:");
41    let mut wfc_grid = Grid::new(20, 15);
42    let wfc = Wfc::new(WfcConfig {
43        floor_weight: 0.45,
44        pattern_size: 3,
45        enable_backtracking: true,
46    });
47    wfc.generate_with_patterns(&mut wfc_grid, learned_patterns.clone(), 54321);
48
49    let wfc_floors = wfc_grid.count(|t| t.is_floor());
50    println!(
51        "   WFC generated {} floors with learned patterns",
52        wfc_floors
53    );
54
55    // Step 4: Find room centers for connectivity analysis
56    println!("\n4. Analyzing Room Connectivity:");
57    let room_centers = find_room_centers(&base_grid);
58    println!("   Identified {} room centers", room_centers.len());
59
60    // Step 5: Create optimal connections with Delaunay + MST
61    println!("\n5. Creating Optimal Room Connections:");
62    if room_centers.len() >= 3 {
63        let triangulation = DelaunayTriangulation::new(room_centers.clone());
64        let mst_edges = triangulation.minimum_spanning_tree();
65
66        println!("   Delaunay triangulation:");
67        println!("     Triangles: {}", triangulation.triangles.len());
68        println!("     All edges: {}", triangulation.edges.len());
69
70        println!("   Minimum spanning tree:");
71        println!("     Optimal edges: {}", mst_edges.len());
72
73        let total_length: f32 = mst_edges
74            .iter()
75            .map(|edge| edge.length(&triangulation.points))
76            .sum();
77        println!("     Total corridor length: {:.1}", total_length);
78
79        // Graph analysis
80        let graph = Graph::new(triangulation.points.clone(), mst_edges);
81        let analysis = GraphAnalysis::analyze(&graph);
82
83        println!("   Connectivity analysis:");
84        println!("     Connected: {}", analysis.is_connected);
85        println!("     Diameter: {:.1}", analysis.diameter);
86        println!("     Clustering: {:.3}", analysis.average_clustering);
87    } else {
88        println!("   Not enough rooms for connectivity analysis");
89    }
90
91    // Step 6: Create specialized prefab library
92    println!("\n6. Creating Specialized Prefab Library:");
93    let library = create_specialized_library();
94
95    println!(
96        "   Created library with {} prefabs:",
97        library.get_prefabs().len()
98    );
99    for prefab in library.get_prefabs() {
100        println!(
101            "     - {} (weight: {:.1}, tags: {:?})",
102            prefab.name, prefab.weight, prefab.tags
103        );
104    }
105
106    // Step 7: Place special features with advanced prefabs
107    println!("\n7. Placing Special Features:");
108    let mut feature_grid = Grid::new(30, 20);
109
110    // Place boss rooms (rare, large)
111    let boss_config = PrefabConfig {
112        max_prefabs: 1,
113        min_spacing: 8,
114        allow_rotation: false,
115        allow_mirroring: false,
116        weighted_selection: true,
117        placement_mode: terrain_forge::algorithms::PrefabPlacementMode::Overwrite,
118        tags: None,
119    };
120
121    let boss_placer = PrefabPlacer::new(boss_config, library.clone());
122    boss_placer.generate(&mut feature_grid, 98765);
123
124    // Place treasure rooms (medium rarity)
125    let treasure_config = PrefabConfig {
126        max_prefabs: 2,
127        min_spacing: 5,
128        allow_rotation: true,
129        allow_mirroring: true,
130        weighted_selection: true,
131        placement_mode: terrain_forge::algorithms::PrefabPlacementMode::Overwrite,
132        tags: None,
133    };
134
135    let treasure_placer = PrefabPlacer::new(treasure_config, library.clone());
136    treasure_placer.generate(&mut feature_grid, 13579);
137
138    let feature_floors = feature_grid.count(|t| t.is_floor());
139    println!("   Placed special features: {} floor tiles", feature_floors);
140
141    // Step 8: Performance and quality metrics
142    println!("\n8. Performance and Quality Metrics:");
143
144    // WFC performance
145    let start = std::time::Instant::now();
146    let mut perf_grid = Grid::new(25, 20);
147    wfc.generate_with_patterns(&mut perf_grid, learned_patterns.clone(), 24680);
148    let wfc_time = start.elapsed();
149
150    // Prefab performance
151    let start = std::time::Instant::now();
152    let placer = PrefabPlacer::new(PrefabConfig::default(), library.clone());
153    let mut prefab_grid = Grid::new(25, 20);
154    placer.generate(&mut prefab_grid, 24680);
155    let prefab_time = start.elapsed();
156
157    // Delaunay performance
158    let start = std::time::Instant::now();
159    let _ = DelaunayTriangulation::new(room_centers.clone());
160    let delaunay_time = start.elapsed();
161
162    println!("   Performance metrics:");
163    println!("     WFC generation: {:?}", wfc_time);
164    println!("     Prefab placement: {:?}", prefab_time);
165    println!("     Delaunay triangulation: {:?}", delaunay_time);
166
167    // Step 9: Quality comparison
168    println!("\n9. Quality Comparison:");
169
170    // Basic generation
171    let mut basic_grid = Grid::new(25, 20);
172    bsp.generate(&mut basic_grid, 11111);
173    let basic_floors = basic_grid.count(|t| t.is_floor());
174
175    // Enhanced generation (WFC + prefabs)
176    let enhanced_floors = perf_grid.count(|t| t.is_floor()) + prefab_grid.count(|t| t.is_floor());
177
178    println!("   Floor tile comparison:");
179    println!(
180        "     Basic BSP: {} floors ({:.1}%)",
181        basic_floors,
182        100.0 * basic_floors as f32 / (25 * 20) as f32
183    );
184    println!(
185        "     Enhanced (WFC + Prefabs): {} floors ({:.1}%)",
186        enhanced_floors,
187        100.0 * enhanced_floors as f32 / (50 * 20) as f32
188    );
189
190    // Step 10: Save configuration for reuse
191    println!("\n10. Saving Configuration:");
192    match library.save_to_json("phase4_library.json") {
193        Ok(()) => println!("   ✅ Saved prefab library to phase4_library.json"),
194        Err(e) => println!("   ❌ Failed to save library: {}", e),
195    }
196
197    println!("\n✅ Phase 4 complete workflow finished!");
198    println!("   Workflow summary:");
199    println!("   1. Generated base layout with BSP algorithm");
200    println!(
201        "   2. Learned {} patterns for WFC enhancement",
202        learned_patterns.len()
203    );
204    println!(
205        "   3. Analyzed {} room connections with Delaunay triangulation",
206        room_centers.len()
207    );
208    println!("   4. Placed specialized features with weighted prefab selection");
209    println!("   5. Achieved optimal room connectivity with MST");
210    println!("   6. Demonstrated pattern learning and constraint propagation");
211    println!("   \n   Phase 4 features enable:");
212    println!("   - Intelligent pattern-based generation");
213    println!("   - Mathematically optimal room connections");
214    println!("   - Flexible, reusable prefab systems");
215    println!("   - Advanced graph analysis for level design");
216}