refactor separate framework from game code, add demo3d

demo3d/client/world/demo3d_chunk_cache.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include "pxl8_mesh.h"
+#include "demo3d_protocol.h"
+#include "pxl8_types.h"
+#include "demo3d_chunk.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define DEMO3D_CHUNK_CACHE_SIZE 512
+#define DEMO3D_CHUNK_MAX_FRAGMENTS 255
+#define DEMO3D_CHUNK_MAX_DATA_SIZE 131072
+
+typedef struct demo3d_chunk_cache_entry {
+    demo3d_chunk* chunk;
+    u64 last_used;
+    bool valid;
+} demo3d_chunk_cache_entry;
+
+typedef struct demo3d_chunk_assembly {
+    u32 id;
+    i32 cx, cy, cz;
+    u32 version;
+    u8 fragment_count;
+    u8 fragments_received;
+    u8* data;
+    u32 data_size;
+    u32 data_capacity;
+    bool active;
+    bool complete;
+} demo3d_chunk_assembly;
+
+typedef struct demo3d_chunk_cache {
+    demo3d_chunk_cache_entry entries[DEMO3D_CHUNK_CACHE_SIZE];
+    demo3d_chunk_assembly assembly;
+    u32 entry_count;
+    u64 frame_counter;
+} demo3d_chunk_cache;
+
+demo3d_chunk_cache* demo3d_chunk_cache_create(void);
+void demo3d_chunk_cache_destroy(demo3d_chunk_cache* cache);
+
+pxl8_result demo3d_chunk_cache_receive(demo3d_chunk_cache* cache,
+                                            const demo3d_chunk_msg_header* hdr,
+                                            const u8* payload, usize len);
+
+demo3d_chunk* demo3d_chunk_cache_get_bsp(demo3d_chunk_cache* cache, u32 id);
+
+void demo3d_chunk_cache_tick(demo3d_chunk_cache* cache);
+
+#ifdef __cplusplus
+}
+#endif