prog

src/dusk/CMakeLists.txt

@@ -9,6 +9,11 @@ if(NOT cglm_FOUND)
   target_link_libraries(${DUSK_LIBRARY_TARGET_NAME} PUBLIC cglm)
 endif()
 
+if(NOT yyjson_FOUND)
+  find_package(yyjson REQUIRED)
+  target_link_libraries(${DUSK_LIBRARY_TARGET_NAME} PUBLIC yyjson::yyjson)
+endif()
+
 
 if(DUSK_BACKTRACE)
   target_link_options(${DUSK_LIBRARY_TARGET_NAME} PUBLIC -rdynamic)

src/dusk/entity/component.c

@@ -12,13 +12,15 @@
 componentdefinition_t COMPONENT_DEFINITIONS[] = {
   [COMPONENT_TYPE_NULL] = { 0 },
 
-  #define X(enm, type, field, iMethod, dMethod, rMethod) \
+  #define X(enm, type, field, iMethod, dMethod, rMethod, sMethod, dsMethod) \
     [COMPONENT_TYPE_##enm] = { \
       .enumName = #enm, \
       .name = #field, \
       .init = iMethod, \
       .dispose = dMethod, \
-      .render = rMethod \
+      .render = rMethod, \
+      .serialize = sMethod, \
+      .deserialize = dsMethod \
     },
 
   #include "componentlist.h"
@@ -130,6 +132,43 @@ errorret_t componentRenderAll(void) {
   errorOk();
 }
 
+void componentSerialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_mut_doc *doc,
+  yyjson_mut_val *obj
+) {
+  assertTrue(entityId < ENTITY_COUNT_MAX, "Entity ID OOB");
+  assertTrue(componentId < ENTITY_COMPONENT_COUNT_MAX, "Component ID OOB");
+  assertNotNull(doc, "JSON doc cannot be null");
+  assertNotNull(obj, "JSON obj cannot be null");
+
+  componentindex_t index = componentGetIndex(entityId, componentId);
+  component_t *cmp = &ENTITY_MANAGER.components[index];
+  if(cmp->type == COMPONENT_TYPE_NULL) return;
+  if(!COMPONENT_DEFINITIONS[cmp->type].serialize) return;
+  COMPONENT_DEFINITIONS[cmp->type].serialize(entityId, componentId, doc, obj);
+}
+
+errorret_t componentDeserialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_val *obj
+) {
+  assertTrue(entityId < ENTITY_COUNT_MAX, "Entity ID OOB");
+  assertTrue(componentId < ENTITY_COMPONENT_COUNT_MAX, "Component ID OOB");
+  assertNotNull(obj, "JSON obj cannot be null");
+
+  componentindex_t index = componentGetIndex(entityId, componentId);
+  component_t *cmp = &ENTITY_MANAGER.components[index];
+  if(cmp->type == COMPONENT_TYPE_NULL) errorOk();
+  if(!COMPONENT_DEFINITIONS[cmp->type].deserialize) errorOk();
+  errorChain(
+    COMPONENT_DEFINITIONS[cmp->type].deserialize(entityId, componentId, obj)
+  );
+  errorOk();
+}
+
 void componentDispose(
   const entityid_t entityId,
   const componentid_t componentId

src/dusk/entity/component.h

@@ -7,14 +7,18 @@
 
 #pragma once
 #include "entitybase.h"
+#include "error/error.h"
 
-#define X(enumName, type, field, init, dispose, render) \
+#include <yyjson.h>
+
+#define X(enumName, type, field, init, dispose, render, serialize, deserialize) \
   // do nothing
 #include "componentlist.h"
 #undef X
 
 typedef union {
-  #define X(enumName, type, field, init, dispose, render) type field;
+  #define X(enumName, type, field, init, dispose, render, serialize, deserialize) \
+    type field;
   #include "componentlist.h"
   #undef X
 } componentdata_t;
@@ -25,12 +29,23 @@ typedef struct {
   void (*init)(const entityid_t, const componentid_t);
   void (*dispose)(const entityid_t, const componentid_t);
   errorret_t (*render)(const entityid_t, const componentid_t);
+  void (*serialize)(
+    const entityid_t,
+    const componentid_t,
+    yyjson_mut_doc *,
+    yyjson_mut_val *
+  );
+  errorret_t (*deserialize)(
+    const entityid_t,
+    const componentid_t,
+    yyjson_val *
+  );
 } componentdefinition_t;
 
 typedef enum {
   COMPONENT_TYPE_NULL,
 
-  #define X(enumName, type, field, init, dispose, render) \
+  #define X(enumName, type, field, init, dispose, render, serialize, deserialize) \
     COMPONENT_TYPE_##enumName,
   #include "componentlist.h"
   #undef X
@@ -118,3 +133,33 @@ void componentDispose(
  * @return Error state.
  */
 errorret_t componentRenderAll(void);
+
+/**
+ * Serializes a component's configurable state into a JSON object. The caller
+ * is responsible for creating and owning the doc and obj.
+ *
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param doc The mutable JSON document to allocate values from.
+ * @param obj The JSON object to write fields into.
+ */
+void componentSerialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_mut_doc *doc,
+  yyjson_mut_val *obj
+);
+
+/**
+ * Deserializes a component's configurable state from a JSON object.
+ *
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param obj The JSON object to read fields from.
+ * @return Error state.
+ */
+errorret_t componentDeserialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_val *obj
+);

src/dusk/entity/component/display/entitycamera.c

@@ -10,6 +10,9 @@
 #include "entity/component/display/entityposition.h"
 #include "display/framebuffer/framebuffer.h"
 #include "display/screen/screen.h"
+#include "assert/assert.h"
+#include "util/string.h"
+#include <yyjson.h>
 
 void entityCameraInit(const entityid_t ent, const componentid_t comp) {
   entitycamera_t *cam = (entitycamera_t *)componentGetData(
@@ -118,3 +121,87 @@ void entityCameraGetRight(const entityid_t entityId, vec2 out) {
   out[0] = rx;
   out[1] = rz;
 }
+
+void entityCameraSerialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_mut_doc *doc,
+  yyjson_mut_val *obj
+) {
+  entitycamera_t *cam = (entitycamera_t *)componentGetData(
+    entityId, componentId, COMPONENT_TYPE_CAMERA
+  );
+  assertNotNull(cam, "Failed to get camera component.");
+
+  const char_t *projStr = "perspective";
+  if(cam->projType == ENTITY_CAMERA_PROJECTION_TYPE_PERSPECTIVE_FLIPPED) {
+    projStr = "perspective_flipped";
+  } else if(cam->projType == ENTITY_CAMERA_PROJECTION_TYPE_ORTHOGRAPHIC) {
+    projStr = "orthographic";
+  }
+
+  yyjson_mut_obj_add_str(doc, obj, "projType", projStr);
+  yyjson_mut_obj_add_real(doc, obj, "nearClip", (double)cam->nearClip);
+  yyjson_mut_obj_add_real(doc, obj, "farClip", (double)cam->farClip);
+
+  if(cam->projType == ENTITY_CAMERA_PROJECTION_TYPE_ORTHOGRAPHIC) {
+    yyjson_mut_obj_add_real(doc, obj, "left", (double)cam->orthographic.left);
+    yyjson_mut_obj_add_real(doc, obj, "right", (double)cam->orthographic.right);
+    yyjson_mut_obj_add_real(doc, obj, "top", (double)cam->orthographic.top);
+    yyjson_mut_obj_add_real(
+      doc, obj, "bottom", (double)cam->orthographic.bottom
+    );
+  } else {
+    yyjson_mut_obj_add_real(doc, obj, "fov", (double)cam->perspective.fov);
+  }
+}
+
+errorret_t entityCameraDeserialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_val *obj
+) {
+  entitycamera_t *cam = (entitycamera_t *)componentGetData(
+    entityId, componentId, COMPONENT_TYPE_CAMERA
+  );
+  assertNotNull(cam, "Failed to get camera component.");
+
+  yyjson_val *v;
+
+  v = yyjson_obj_get(obj, "projType");
+  if(v && yyjson_is_str(v)) {
+    const char_t *s = yyjson_get_str(v);
+    if(stringCompare(s, "perspective_flipped") == 0) {
+      cam->projType = ENTITY_CAMERA_PROJECTION_TYPE_PERSPECTIVE_FLIPPED;
+    } else if(stringCompare(s, "orthographic") == 0) {
+      cam->projType = ENTITY_CAMERA_PROJECTION_TYPE_ORTHOGRAPHIC;
+    } else {
+      cam->projType = ENTITY_CAMERA_PROJECTION_TYPE_PERSPECTIVE;
+    }
+  }
+
+  v = yyjson_obj_get(obj, "nearClip");
+  if(v) cam->nearClip = (float_t)yyjson_get_num(v);
+
+  v = yyjson_obj_get(obj, "farClip");
+  if(v) cam->farClip = (float_t)yyjson_get_num(v);
+
+  if(cam->projType == ENTITY_CAMERA_PROJECTION_TYPE_ORTHOGRAPHIC) {
+    v = yyjson_obj_get(obj, "left");
+    if(v) cam->orthographic.left = (float_t)yyjson_get_num(v);
+
+    v = yyjson_obj_get(obj, "right");
+    if(v) cam->orthographic.right = (float_t)yyjson_get_num(v);
+
+    v = yyjson_obj_get(obj, "top");
+    if(v) cam->orthographic.top = (float_t)yyjson_get_num(v);
+
+    v = yyjson_obj_get(obj, "bottom");
+    if(v) cam->orthographic.bottom = (float_t)yyjson_get_num(v);
+  } else {
+    v = yyjson_obj_get(obj, "fov");
+    if(v) cam->perspective.fov = (float_t)yyjson_get_num(v);
+  }
+
+  errorOk();
+}

src/dusk/entity/component/display/entitycamera.h

@@ -7,6 +7,8 @@
 
 #pragma once
 #include "entity/entitybase.h"
+#include "error/error.h"
+#include <yyjson.h>
 
 typedef enum {
   ENTITY_CAMERA_PROJECTION_TYPE_PERSPECTIVE,
@@ -97,3 +99,34 @@ void entityCameraLookAtPixelPerfect(
   const vec3 eyeOffset,
   const float_t scale
 );
+
+/**
+ * Serializes camera projection settings to a JSON object. Writes "projType"
+ * as a string ("perspective", "perspective_flipped", or "orthographic"),
+ * "nearClip", "farClip", and the projection-specific parameters.
+ *
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param doc The mutable JSON document to allocate values from.
+ * @param obj The JSON object to write fields into.
+ */
+void entityCameraSerialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_mut_doc *doc,
+  yyjson_mut_val *obj
+);
+
+/**
+ * Deserializes camera projection settings from a JSON object.
+ *
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param obj The JSON object to read fields from.
+ * @return Error state.
+ */
+errorret_t entityCameraDeserialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_val *obj
+);

src/dusk/entity/component/display/entityposition.c

@@ -6,6 +6,8 @@
  */
 
 #include "entity/entitymanager.h"
+#include "assert/assert.h"
+#include <yyjson.h>
 
 // Decompose localTransform into the PRS cache. Only called when PRS_DIRTY.
 static void entityPositionEnsurePRS(entityposition_t *pos) {
@@ -628,3 +630,68 @@ void entityPositionDecompose(entityposition_t *pos) {
       : -atan2f(r01, r11);
   }
 }
+
+void entityPositionSerialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_mut_doc *doc,
+  yyjson_mut_val *obj
+) {
+  entityposition_t *pos = entityPositionGet(entityId, componentId);
+  assertNotNull(pos, "Failed to get position component.");
+
+  yyjson_mut_val *arr;
+
+  arr = yyjson_mut_arr(doc);
+  yyjson_mut_arr_add_real(doc, arr, (double)pos->position[0]);
+  yyjson_mut_arr_add_real(doc, arr, (double)pos->position[1]);
+  yyjson_mut_arr_add_real(doc, arr, (double)pos->position[2]);
+  yyjson_mut_obj_add_val(doc, obj, "position", arr);
+
+  arr = yyjson_mut_arr(doc);
+  yyjson_mut_arr_add_real(doc, arr, (double)pos->rotation[0]);
+  yyjson_mut_arr_add_real(doc, arr, (double)pos->rotation[1]);
+  yyjson_mut_arr_add_real(doc, arr, (double)pos->rotation[2]);
+  yyjson_mut_obj_add_val(doc, obj, "rotation", arr);
+
+  arr = yyjson_mut_arr(doc);
+  yyjson_mut_arr_add_real(doc, arr, (double)pos->scale[0]);
+  yyjson_mut_arr_add_real(doc, arr, (double)pos->scale[1]);
+  yyjson_mut_arr_add_real(doc, arr, (double)pos->scale[2]);
+  yyjson_mut_obj_add_val(doc, obj, "scale", arr);
+}
+
+errorret_t entityPositionDeserialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_val *obj
+) {
+  entityposition_t *pos = entityPositionGet(entityId, componentId);
+  assertNotNull(pos, "Failed to get position component.");
+
+  yyjson_val *v;
+
+  v = yyjson_obj_get(obj, "position");
+  if(v && yyjson_is_arr(v) && yyjson_arr_size(v) == 3) {
+    pos->position[0] = (float_t)yyjson_get_num(yyjson_arr_get(v, 0));
+    pos->position[1] = (float_t)yyjson_get_num(yyjson_arr_get(v, 1));
+    pos->position[2] = (float_t)yyjson_get_num(yyjson_arr_get(v, 2));
+  }
+
+  v = yyjson_obj_get(obj, "rotation");
+  if(v && yyjson_is_arr(v) && yyjson_arr_size(v) == 3) {
+    pos->rotation[0] = (float_t)yyjson_get_num(yyjson_arr_get(v, 0));
+    pos->rotation[1] = (float_t)yyjson_get_num(yyjson_arr_get(v, 1));
+    pos->rotation[2] = (float_t)yyjson_get_num(yyjson_arr_get(v, 2));
+  }
+
+  v = yyjson_obj_get(obj, "scale");
+  if(v && yyjson_is_arr(v) && yyjson_arr_size(v) == 3) {
+    pos->scale[0] = (float_t)yyjson_get_num(yyjson_arr_get(v, 0));
+    pos->scale[1] = (float_t)yyjson_get_num(yyjson_arr_get(v, 1));
+    pos->scale[2] = (float_t)yyjson_get_num(yyjson_arr_get(v, 2));
+  }
+
+  entityPositionRebuild(pos);
+  errorOk();
+}

src/dusk/entity/component/display/entityposition.h

@@ -7,6 +7,8 @@
 
 #pragma once
 #include "entity/entitybase.h"
+#include "error/error.h"
+#include <yyjson.h>
 
 /** Maximum number of child position components this node can track. */
 #define ENTITY_POSITION_CHILDREN_MAX 8
@@ -373,3 +375,34 @@ void entityPositionDisposeDeep(
  * @param pos The position component to decompose.
  */
 void entityPositionDecompose(entityposition_t *pos);
+
+/**
+ * Serializes position, rotation, and scale (local space) to a JSON object.
+ * Parent/child linkage and computed matrices are not included.
+ *
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param doc The mutable JSON document to allocate values from.
+ * @param obj The JSON object to write fields into.
+ */
+void entityPositionSerialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_mut_doc *doc,
+  yyjson_mut_val *obj
+);
+
+/**
+ * Deserializes position, rotation, and scale from a JSON object and rebuilds
+ * the local transform.
+ *
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param obj The JSON object to read fields from.
+ * @return Error state.
+ */
+errorret_t entityPositionDeserialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_val *obj
+);

src/dusk/entity/component/display/entityrenderable.c

@@ -13,6 +13,8 @@
 #include "display/mesh/cube.h"
 #include "util/memory.h"
 #include "assert/assert.h"
+#include "util/string.h"
+#include <yyjson.h>
 
 void entityRenderableInit(
   const entityid_t entityId,
@@ -140,3 +142,77 @@ errorret_t entityRenderableDraw(
       assertUnreachable("Invalid renderable type");
   }
 }
+
+void entityRenderableSerialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_mut_doc *doc,
+  yyjson_mut_val *obj
+) {
+  entityrenderable_t *r = (entityrenderable_t *)componentGetData(
+    entityId, componentId, COMPONENT_TYPE_RENDERABLE
+  );
+  assertNotNull(r, "Failed to get renderable component.");
+
+  const char_t *typeStr = "custom";
+  if(r->type == ENTITY_RENDERABLE_TYPE_SPRITEBATCH) {
+    typeStr = "spritebatch";
+  } else if(r->type == ENTITY_RENDERABLE_TYPE_SHADER_MATERIAL) {
+    typeStr = "shader_material";
+  }
+
+  yyjson_mut_obj_add_str(doc, obj, "type", typeStr);
+  yyjson_mut_obj_add_int(doc, obj, "priority", (int64_t)r->priority);
+
+  if(r->type == ENTITY_RENDERABLE_TYPE_SHADER_MATERIAL) {
+    yyjson_mut_obj_add_int(
+      doc, obj, "shaderType", (int64_t)r->data.material.shaderType
+    );
+    yyjson_mut_obj_add_int(
+      doc, obj, "stateFlags", (int64_t)r->data.material.state.flags
+    );
+  }
+}
+
+errorret_t entityRenderableDeserialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_val *obj
+) {
+  entityrenderable_t *r = (entityrenderable_t *)componentGetData(
+    entityId, componentId, COMPONENT_TYPE_RENDERABLE
+  );
+  assertNotNull(r, "Failed to get renderable component.");
+
+  yyjson_val *v;
+
+  v = yyjson_obj_get(obj, "type");
+  if(v && yyjson_is_str(v)) {
+    const char_t *s = yyjson_get_str(v);
+    if(stringCompare(s, "spritebatch") == 0) {
+      entityRenderableSetType(entityId, componentId,
+        ENTITY_RENDERABLE_TYPE_SPRITEBATCH);
+    } else if(stringCompare(s, "shader_material") == 0) {
+      entityRenderableSetType(entityId, componentId,
+        ENTITY_RENDERABLE_TYPE_SHADER_MATERIAL);
+    } else {
+      entityRenderableSetType(entityId, componentId,
+        ENTITY_RENDERABLE_TYPE_CUSTOM);
+    }
+  }
+
+  v = yyjson_obj_get(obj, "priority");
+  if(v) r->priority = (int8_t)yyjson_get_sint(v);
+
+  if(r->type == ENTITY_RENDERABLE_TYPE_SHADER_MATERIAL) {
+    v = yyjson_obj_get(obj, "shaderType");
+    if(v) {
+      r->data.material.shaderType = (shaderlistshader_t)yyjson_get_sint(v);
+    }
+
+    v = yyjson_obj_get(obj, "stateFlags");
+    if(v) r->data.material.state.flags = (uint8_t)yyjson_get_sint(v);
+  }
+
+  errorOk();
+}

src/dusk/entity/component/display/entityrenderable.h

@@ -11,6 +11,7 @@
 #include "display/shader/shadermaterial.h"
 #include "display/spritebatch/spritebatch.h"
 #include "display/displaystate.h"
+#include <yyjson.h>
 
 #define ENTITY_RENDERABLE_SPRITEBATCH_SPRITES_MAX 64
 #define ENTITY_RENDERABLE_MESHES_MAX 8
@@ -145,3 +146,33 @@ errorret_t entityRenderableDraw(
   const entityid_t entityId,
   const componentid_t componentId
 );
+
+/**
+ * Serializes renderable type, priority, and material settings to a JSON
+ * object. Custom and spritebatch renderables only serialize type and priority.
+ *
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param doc The mutable JSON document to allocate values from.
+ * @param obj The JSON object to write fields into.
+ */
+void entityRenderableSerialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_mut_doc *doc,
+  yyjson_mut_val *obj
+);
+
+/**
+ * Deserializes renderable settings from a JSON object.
+ *
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param obj The JSON object to read fields from.
+ * @return Error state.
+ */
+errorret_t entityRenderableDeserialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_val *obj
+);

src/dusk/entity/component/physics/entityphysics.c

@@ -11,6 +11,8 @@
 #include "physics/physicsmanager.h"
 #include "assert/assert.h"
 #include "util/memory.h"
+#include "util/string.h"
+#include <yyjson.h>
 
 void entityPhysicsInit(
   const entityid_t entityId,
@@ -124,3 +126,172 @@ void entityPhysicsDispose(
   const componentid_t componentId
 ) {
 }
+
+void entityPhysicsSerialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_mut_doc *doc,
+  yyjson_mut_val *obj
+) {
+  entityphysics_t *phys = entityPhysicsGet(entityId, componentId);
+  assertNotNull(phys, "Failed to get physics component.");
+
+  const char_t *bodyStr = "static";
+  if(phys->type == PHYSICS_BODY_DYNAMIC) {
+    bodyStr = "dynamic";
+  } else if(phys->type == PHYSICS_BODY_KINEMATIC) {
+    bodyStr = "kinematic";
+  }
+  yyjson_mut_obj_add_str(doc, obj, "bodyType", bodyStr);
+
+  const char_t *shapeStr = "cube";
+  if(phys->shape.type == PHYSICS_SHAPE_SPHERE) {
+    shapeStr = "sphere";
+  } else if(phys->shape.type == PHYSICS_SHAPE_CAPSULE) {
+    shapeStr = "capsule";
+  } else if(phys->shape.type == PHYSICS_SHAPE_PLANE) {
+    shapeStr = "plane";
+  }
+  yyjson_mut_obj_add_str(doc, obj, "shapeType", shapeStr);
+
+  switch(phys->shape.type) {
+    case PHYSICS_SHAPE_CUBE: {
+      yyjson_mut_val *he = yyjson_mut_arr(doc);
+      yyjson_mut_arr_add_real(
+        doc, he, (double)phys->shape.data.cube.halfExtents[0]
+      );
+      yyjson_mut_arr_add_real(
+        doc, he, (double)phys->shape.data.cube.halfExtents[1]
+      );
+      yyjson_mut_arr_add_real(
+        doc, he, (double)phys->shape.data.cube.halfExtents[2]
+      );
+      yyjson_mut_obj_add_val(doc, obj, "halfExtents", he);
+      break;
+    }
+    case PHYSICS_SHAPE_SPHERE:
+      yyjson_mut_obj_add_real(
+        doc, obj, "radius", (double)phys->shape.data.sphere.radius
+      );
+      break;
+    case PHYSICS_SHAPE_CAPSULE:
+      yyjson_mut_obj_add_real(
+        doc, obj, "radius", (double)phys->shape.data.capsule.radius
+      );
+      yyjson_mut_obj_add_real(
+        doc, obj, "halfHeight", (double)phys->shape.data.capsule.halfHeight
+      );
+      break;
+    case PHYSICS_SHAPE_PLANE: {
+      yyjson_mut_val *n = yyjson_mut_arr(doc);
+      yyjson_mut_arr_add_real(
+        doc, n, (double)phys->shape.data.plane.normal[0]
+      );
+      yyjson_mut_arr_add_real(
+        doc, n, (double)phys->shape.data.plane.normal[1]
+      );
+      yyjson_mut_arr_add_real(
+        doc, n, (double)phys->shape.data.plane.normal[2]
+      );
+      yyjson_mut_obj_add_val(doc, obj, "normal", n);
+      yyjson_mut_obj_add_real(
+        doc, obj, "distance", (double)phys->shape.data.plane.distance
+      );
+      break;
+    }
+    default:
+      break;
+  }
+
+  yyjson_mut_val *vel = yyjson_mut_arr(doc);
+  yyjson_mut_arr_add_real(doc, vel, (double)phys->velocity[0]);
+  yyjson_mut_arr_add_real(doc, vel, (double)phys->velocity[1]);
+  yyjson_mut_arr_add_real(doc, vel, (double)phys->velocity[2]);
+  yyjson_mut_obj_add_val(doc, obj, "velocity", vel);
+
+  yyjson_mut_obj_add_real(doc, obj, "gravityScale", (double)phys->gravityScale);
+}
+
+errorret_t entityPhysicsDeserialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_val *obj
+) {
+  entityphysics_t *phys = entityPhysicsGet(entityId, componentId);
+  assertNotNull(phys, "Failed to get physics component.");
+
+  yyjson_val *v;
+
+  v = yyjson_obj_get(obj, "bodyType");
+  if(v && yyjson_is_str(v)) {
+    const char_t *s = yyjson_get_str(v);
+    if(stringCompare(s, "dynamic") == 0) {
+      phys->type = PHYSICS_BODY_DYNAMIC;
+    } else if(stringCompare(s, "kinematic") == 0) {
+      phys->type = PHYSICS_BODY_KINEMATIC;
+    } else {
+      phys->type = PHYSICS_BODY_STATIC;
+    }
+  }
+
+  v = yyjson_obj_get(obj, "shapeType");
+  if(v && yyjson_is_str(v)) {
+    physicsshape_t shape;
+    memoryZero(&shape, sizeof(physicsshape_t));
+    const char_t *s = yyjson_get_str(v);
+    if(stringCompare(s, "sphere") == 0) {
+      shape.type = PHYSICS_SHAPE_SPHERE;
+      yyjson_val *r = yyjson_obj_get(obj, "radius");
+      if(r) shape.data.sphere.radius = (float_t)yyjson_get_num(r);
+    } else if(stringCompare(s, "capsule") == 0) {
+      shape.type = PHYSICS_SHAPE_CAPSULE;
+      yyjson_val *r = yyjson_obj_get(obj, "radius");
+      if(r) shape.data.capsule.radius = (float_t)yyjson_get_num(r);
+      yyjson_val *hh = yyjson_obj_get(obj, "halfHeight");
+      if(hh) shape.data.capsule.halfHeight = (float_t)yyjson_get_num(hh);
+    } else if(stringCompare(s, "plane") == 0) {
+      shape.type = PHYSICS_SHAPE_PLANE;
+      yyjson_val *n = yyjson_obj_get(obj, "normal");
+      if(n && yyjson_is_arr(n) && yyjson_arr_size(n) == 3) {
+        shape.data.plane.normal[0] = (float_t)yyjson_get_num(
+          yyjson_arr_get(n, 0)
+        );
+        shape.data.plane.normal[1] = (float_t)yyjson_get_num(
+          yyjson_arr_get(n, 1)
+        );
+        shape.data.plane.normal[2] = (float_t)yyjson_get_num(
+          yyjson_arr_get(n, 2)
+        );
+      }
+      yyjson_val *d = yyjson_obj_get(obj, "distance");
+      if(d) shape.data.plane.distance = (float_t)yyjson_get_num(d);
+    } else {
+      shape.type = PHYSICS_SHAPE_CUBE;
+      yyjson_val *he = yyjson_obj_get(obj, "halfExtents");
+      if(he && yyjson_is_arr(he) && yyjson_arr_size(he) == 3) {
+        shape.data.cube.halfExtents[0] = (float_t)yyjson_get_num(
+          yyjson_arr_get(he, 0)
+        );
+        shape.data.cube.halfExtents[1] = (float_t)yyjson_get_num(
+          yyjson_arr_get(he, 1)
+        );
+        shape.data.cube.halfExtents[2] = (float_t)yyjson_get_num(
+          yyjson_arr_get(he, 2)
+        );
+      }
+    }
+    entityPhysicsSetShape(entityId, componentId, shape);
+  }
+
+  v = yyjson_obj_get(obj, "velocity");
+  if(v && yyjson_is_arr(v) && yyjson_arr_size(v) == 3) {
+    phys->velocity[0] = (float_t)yyjson_get_num(yyjson_arr_get(v, 0));
+    phys->velocity[1] = (float_t)yyjson_get_num(yyjson_arr_get(v, 1));
+    phys->velocity[2] = (float_t)yyjson_get_num(yyjson_arr_get(v, 2));
+  }
+
+  v = yyjson_obj_get(obj, "gravityScale");
+  if(v) phys->gravityScale = (float_t)yyjson_get_num(v);
+
+  errorOk();
+}

src/dusk/entity/component/physics/entityphysics.h

@@ -9,6 +9,8 @@
 #include "entity/entitybase.h"
 #include "physics/physicsshape.h"
 #include "physics/physicsbodytype.h"
+#include "error/error.h"
+#include <yyjson.h>
 
 typedef struct {
   physicsbodytype_t type;
@@ -155,3 +157,34 @@ void entityPhysicsDispose(
   const entityid_t entityId,
   const componentid_t componentId
 );
+
+/**
+ * Serializes body type, shape, velocity, and gravity scale to a JSON object.
+ * Runtime state (onGround) is not included.
+ *
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param doc The mutable JSON document to allocate values from.
+ * @param obj The JSON object to write fields into.
+ */
+void entityPhysicsSerialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_mut_doc *doc,
+  yyjson_mut_val *obj
+);
+
+/**
+ * Deserializes body type, shape, velocity, and gravity scale from a JSON
+ * object.
+ *
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param obj The JSON object to read fields from.
+ * @return Error state.
+ */
+errorret_t entityPhysicsDeserialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_val *obj
+);

src/dusk/entity/component/trigger/entitytrigger.c

@@ -6,6 +6,8 @@
  */
 
 #include "entity/entitymanager.h"
+#include "assert/assert.h"
+#include <yyjson.h>
 
 void entityTriggerInit(
   const entityid_t entityId,
@@ -52,3 +54,54 @@ void entityTriggerSetBounds(
   glm_vec3_copy((float_t*)min, t->min);
   glm_vec3_copy((float_t*)max, t->max);
 }
+
+void entityTriggerSerialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_mut_doc *doc,
+  yyjson_mut_val *obj
+) {
+  entitytrigger_t *trigger = entityTriggerGet(entityId, componentId);
+  assertNotNull(trigger, "Failed to get trigger component.");
+
+  yyjson_mut_val *arr;
+
+  arr = yyjson_mut_arr(doc);
+  yyjson_mut_arr_add_real(doc, arr, (double)trigger->min[0]);
+  yyjson_mut_arr_add_real(doc, arr, (double)trigger->min[1]);
+  yyjson_mut_arr_add_real(doc, arr, (double)trigger->min[2]);
+  yyjson_mut_obj_add_val(doc, obj, "min", arr);
+
+  arr = yyjson_mut_arr(doc);
+  yyjson_mut_arr_add_real(doc, arr, (double)trigger->max[0]);
+  yyjson_mut_arr_add_real(doc, arr, (double)trigger->max[1]);
+  yyjson_mut_arr_add_real(doc, arr, (double)trigger->max[2]);
+  yyjson_mut_obj_add_val(doc, obj, "max", arr);
+}
+
+errorret_t entityTriggerDeserialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_val *obj
+) {
+  entitytrigger_t *trigger = entityTriggerGet(entityId, componentId);
+  assertNotNull(trigger, "Failed to get trigger component.");
+
+  yyjson_val *v;
+
+  v = yyjson_obj_get(obj, "min");
+  if(v && yyjson_is_arr(v) && yyjson_arr_size(v) == 3) {
+    trigger->min[0] = (float_t)yyjson_get_num(yyjson_arr_get(v, 0));
+    trigger->min[1] = (float_t)yyjson_get_num(yyjson_arr_get(v, 1));
+    trigger->min[2] = (float_t)yyjson_get_num(yyjson_arr_get(v, 2));
+  }
+
+  v = yyjson_obj_get(obj, "max");
+  if(v && yyjson_is_arr(v) && yyjson_arr_size(v) == 3) {
+    trigger->max[0] = (float_t)yyjson_get_num(yyjson_arr_get(v, 0));
+    trigger->max[1] = (float_t)yyjson_get_num(yyjson_arr_get(v, 1));
+    trigger->max[2] = (float_t)yyjson_get_num(yyjson_arr_get(v, 2));
+  }
+
+  errorOk();
+}

src/dusk/entity/component/trigger/entitytrigger.h

@@ -7,6 +7,8 @@
 
 #pragma once
 #include "entity/entitybase.h"
+#include "error/error.h"
+#include <yyjson.h>
 
 typedef struct {
   vec3 min;
@@ -47,3 +49,32 @@ void entityTriggerSetBounds(
   const vec3 min,
   const vec3 max
 );
+
+/**
+ * Serializes the trigger's min and max bounds to a JSON object.
+ *
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param doc The mutable JSON document to allocate values from.
+ * @param obj The JSON object to write fields into.
+ */
+void entityTriggerSerialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_mut_doc *doc,
+  yyjson_mut_val *obj
+);
+
+/**
+ * Deserializes the trigger's min and max bounds from a JSON object.
+ *
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param obj The JSON object to read fields from.
+ * @return Error state.
+ */
+errorret_t entityTriggerDeserialize(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  yyjson_val *obj
+);

src/dusk/entity/componentlist.h

@@ -17,11 +17,21 @@
 // Init function (optional)
 // Dispose function (optional)
 // Render function (optional)
+// Serialize function (optional)
+// Deserialize function (optional)
 
-X(POSITION, entityposition_t, position, entityPositionInit, NULL, NULL)
+X(POSITION, entityposition_t, position,
-X(CAMERA, entitycamera_t, camera, entityCameraInit, NULL, NULL)
+  entityPositionInit, NULL, NULL,
+  entityPositionSerialize, entityPositionDeserialize)
+X(CAMERA, entitycamera_t, camera,
+  entityCameraInit, NULL, NULL,
+  entityCameraSerialize, entityCameraDeserialize)
 X(RENDERABLE, entityrenderable_t, renderable,
-  entityRenderableInit, entityRenderableDispose, NULL)
+  entityRenderableInit, entityRenderableDispose, NULL,
+  entityRenderableSerialize, entityRenderableDeserialize)
 X(PHYSICS, entityphysics_t, physics,
-  entityPhysicsInit, entityPhysicsDispose, NULL)
+  entityPhysicsInit, entityPhysicsDispose, NULL,
-X(TRIGGER, entitytrigger_t, trigger, entityTriggerInit, NULL, NULL)
+  entityPhysicsSerialize, entityPhysicsDeserialize)
+X(TRIGGER, entitytrigger_t, trigger,
+  entityTriggerInit, NULL, NULL,
+  entityTriggerSerialize, entityTriggerDeserialize)