Add inventory.

archive/assetchunk.c

@@ -0,0 +1,178 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "asset/asset.h"
+#include "assert/assert.h"
+#include "rpg/entity/entity.h"
+
+#pragma pack(push, 1)
+typedef struct {
+  uint32_t tileCount;
+  uint8_t modelCount;
+  uint8_t entityCount;
+} assetchunkheader_t;
+#pragma pack(pop)
+
+#pragma pack(push, 1)
+typedef struct {
+  tile_t tile;
+} assetchunktiledata_t;
+#pragma pack(pop)
+
+#pragma pack(push, 1)
+typedef struct {
+  uint32_t vertexCount;
+} assetchunkmodelheader_t;
+#pragma pack(pop)
+
+#pragma pack(push, 1)
+typedef struct {
+  entitytype_t entityType;
+  uint8_t localX;
+  uint8_t localY;
+  uint8_t localZ;
+} assetchunkentityheader_t;
+#pragma pack(pop)
+
+errorret_t assetChunkLoad(assetcustom_t custom) {
+  assertNotNull(custom.output, "Output pointer cannot be NULL");
+  assertNotNull(custom.zipFile, "Zip file pointer cannot be NULL");
+
+  chunk_t *chunk = (chunk_t *)custom.output;
+  assertTrue(chunk->meshCount == 0, "Chunk is not in a good state");
+
+  // Read header
+  assetchunkheader_t header;
+  size_t bytesRead = zip_fread(
+    custom.zipFile, &header, sizeof(assetchunkheader_t)
+  );
+  if(bytesRead != sizeof(assetchunkheader_t)) {
+    zip_fclose(custom.zipFile);
+    errorThrow("Failed to read chunk asset header.");
+  }
+
+  if(header.tileCount != CHUNK_TILE_COUNT) {
+    zip_fclose(custom.zipFile);
+    errorThrow(
+      "Chunk asset has invalid tile count: %d (expected %d).",
+      header.tileCount,
+      CHUNK_TILE_COUNT
+    );
+  }
+
+  if(header.modelCount > CHUNK_MESH_COUNT_MAX) {
+    zip_fclose(custom.zipFile);
+    errorThrow(
+      "Chunk asset has too many models: %d (max %d).",
+      header.modelCount,
+      CHUNK_MESH_COUNT_MAX
+    );
+  }
+
+  if(header.entityCount > CHUNK_ENTITY_COUNT_MAX) {
+    zip_fclose(custom.zipFile);
+    errorThrow(
+      "Chunk asset has too many entities: %d (max %d).",
+      header.entityCount,
+      CHUNK_ENTITY_COUNT_MAX
+    );
+  }
+
+  chunk->meshCount = header.modelCount;
+
+  // Read tile data
+  bytesRead = zip_fread(
+    custom.zipFile,
+    chunk->tiles,
+    sizeof(assetchunktiledata_t) * header.tileCount
+  );
+  if(bytesRead != sizeof(assetchunktiledata_t) * header.tileCount) {
+    zip_fclose(custom.zipFile);
+    errorThrow("Failed to read chunk tile data.");
+  }
+
+  // For each model...
+  uint32_t vertexIndex = 0;
+  for(uint8_t i = 0; i < header.modelCount; i++) {
+    assetchunkmodelheader_t modelHeader;
+    bytesRead = zip_fread(
+      custom.zipFile, &modelHeader, sizeof(assetchunkmodelheader_t)
+    );
+    if(bytesRead != sizeof(assetchunkmodelheader_t)) {
+      zip_fclose(custom.zipFile);
+      errorThrow("Failed to read chunk model header.");
+    }
+
+    if(
+      vertexIndex + modelHeader.vertexCount >
+      CHUNK_VERTEX_COUNT_MAX
+    ) {
+      zip_fclose(custom.zipFile);
+      errorThrow("Chunk model vertex count exceeds maximum.");
+    }
+    
+    // Read vertex data.
+    bytesRead = zip_fread(
+      custom.zipFile,
+      &chunk->vertices[vertexIndex],
+      sizeof(meshvertex_t) * modelHeader.vertexCount
+    );
+    if(bytesRead != sizeof(meshvertex_t) * modelHeader.vertexCount) {
+      zip_fclose(custom.zipFile);
+      errorThrow("Failed to read chunk model vertex data.");
+    }
+
+    // Init the mesh
+    if(modelHeader.vertexCount > 0) {
+      mesh_t *mesh = &chunk->meshes[i];
+      meshInit(
+        mesh,
+        MESH_PRIMITIVE_TRIANGLES,
+        modelHeader.vertexCount,
+        &chunk->vertices[vertexIndex]
+      );
+
+      vertexIndex += modelHeader.vertexCount;
+    } else {
+      chunk->meshes[i].vertexCount = 0;
+    }
+  }
+
+  // Read entity data
+  for(uint8_t i = 0; i < header.entityCount; i++) {
+    assetchunkentityheader_t entityHeader;
+    bytesRead = zip_fread(
+      custom.zipFile, &entityHeader, sizeof(assetchunkentityheader_t)
+    );
+    if(bytesRead != sizeof(assetchunkentityheader_t)) {
+      zip_fclose(custom.zipFile);
+      errorThrow("Failed to read chunk entity header.");
+    }
+
+    uint8_t entityIndex = entityGetAvailable();
+    if(entityIndex == 0xFF) {
+      zip_fclose(custom.zipFile);
+      errorThrow("No available entity slots.");
+    }
+
+    entity_t *entity = &ENTITIES[entityIndex];
+    entityInit(entity, (entitytype_t)entityHeader.entityType);
+    entity->position.x = (
+      (chunk->position.x * CHUNK_WIDTH) + entityHeader.localX
+    );
+    entity->position.y = (
+      (chunk->position.y * CHUNK_HEIGHT) + entityHeader.localY
+    );
+    entity->position.z = (
+      (chunk->position.z * CHUNK_DEPTH) + entityHeader.localZ
+    );
+
+    chunk->entities[i] = entityIndex;
+  }
+
+  errorOk();
+}