source/ecs/manager.d

@@ -1374,8 +1374,6 @@ export struct EntityManager
             {
                 memcpy(temp.entity_data.ptr + info.tmpl_deltas[comp],
                         components[comp].init_data.ptr, components[comp].size);
-                /*temp.entity_data[info.tmpl_deltas[comp] .. info.tmpl_deltas[comp] + components[comp].size]
-                    = components[comp].init_data;*/
             }
         }
         else
@@ -1383,7 +1381,7 @@ export struct EntityManager
             ushort index = block.entityIndex(entity);
             foreach (comp; info.components)
             {
-                memcpy(cast(void*) temp.entity_data + info.tmpl_deltas[comp],
+                memcpy(cast(void*) temp.entity_data.ptr + info.tmpl_deltas[comp],
                         cast(void*) block + info.deltas[comp] + components[comp].size * index,
                         components[comp].size);
             }
@@ -1440,6 +1438,74 @@ export struct EntityManager
         return temp;
     }
 
+    /************************************************************************************************************************
+    *Allocate EntityTemplate with specifed components and returns pointer to it.
+    *
+    *Params:
+    *components_ids = array of components allocated with template
+    */
+    export EntityTemplate* allocateTemplate(EntityTemplate* base_tmpl, ushort[] components_ids, ushort[] remove_components_ids = null)
+    {
+        size_t len = base_tmpl.info.components.length + components_ids.length;
+        ushort[] ids = (cast(ushort*) alloca(ushort.sizeof * len))[0
+            .. len];
+        memcpy(ids.ptr, base_tmpl.info.components.ptr, ushort.sizeof * base_tmpl.info.components.length);
+        memcpy(ids.ptr + base_tmpl.info.components.length, components_ids.ptr, ushort.sizeof * components_ids.length);
+        
+        qsort(ids.ptr, ids.length, ushort.sizeof, &compareUShorts);
+        qsort(remove_components_ids.ptr, remove_components_ids.length, ushort.sizeof, &compareUShorts);
+        {
+            uint k = 0;
+            uint j = 1;
+            foreach (i; 1 .. ids.length)
+            {
+                assert(ids[i] != ushort.max);
+                if(k < remove_components_ids.length)
+                {
+                    while(k < remove_components_ids.length && remove_components_ids[k] < ids[i])
+                    {
+                        k++;
+                    }
+                    if(k < remove_components_ids.length)
+                    {
+                        if(remove_components_ids[k] == ids[i])continue;
+                    }
+                }
+                if (ids[i] != ids[j - 1])
+                {
+                    ids[j] = ids[i];
+                    j++;
+                }
+                else
+                    debug assert(0, "Duplicated components in template!!!");
+            }
+            ids = ids[0 .. j];
+        }
+
+        EntityInfo* info = getEntityInfo(ids);
+
+        EntityTemplate* temp = Mallocator.make!EntityTemplate;
+        temp.entity_data = Mallocator.makeArray!ubyte(info.size);
+        temp.info = info;
+
+        //fill components with default data and copy from base template
+        foreach (comp; info.components)
+        {
+            if(comp < base_tmpl.info.deltas.length && base_tmpl.info.deltas[comp] != ushort.max) //copy data from base component
+            {
+                memcpy(temp.entity_data.ptr + info.tmpl_deltas[comp],
+                        base_tmpl.entity_data.ptr + base_tmpl.info.tmpl_deltas[comp], components[comp].size);
+            }
+            else //fill with default data
+            {
+                memcpy(temp.entity_data.ptr + info.tmpl_deltas[comp],
+                        components[comp].init_data.ptr, components[comp].size);
+            }
+        }
+
+        return temp;
+    }
+
     /************************************************************************************************************************
     *Returns entity type info.
     *

tests/basic.d

@@ -1,2 +1,174 @@
 module tests.basic;
 
+import ecs.manager;
+import ecs.core;
+
+struct CInt
+{
+    mixin ECS.Component;
+
+    alias value this;
+
+    int value = 1;
+}
+
+struct CFloat
+{
+    mixin ECS.Component;
+
+    alias value this;
+
+    float value = 2.0;
+}
+
+struct CDouble
+{
+    mixin ECS.Component;
+
+    alias value this;
+
+    double value = 3.0;
+}
+
+struct CLong
+{
+    mixin ECS.Component;
+
+    alias value this;
+
+    long value = 10;
+}
+
+struct CShort
+{
+    mixin ECS.Component;
+
+    alias value this;
+
+    short value = 12;
+}
+
+void beforeEveryTest()
+{
+    gEM.initialize(1);
+
+    gEM.registerComponent!CInt;
+    gEM.registerComponent!CFloat;
+    gEM.registerComponent!CDouble;
+    gEM.registerComponent!CLong;
+    gEM.registerComponent!CShort;
+}
+
+void afterEveryTest()
+{
+    gEM.destroy();
+}
+
+@("AddEntity")
+unittest
+{
+    ushort[2] ids = [CInt.component_id, CFloat.component_id];
+    EntityTemplate* tmpl_ = gEM.allocateTemplate(ids);
+    assert(tmpl_.info.components.length == 2);
+    assert(tmpl_.getComponent!CInt);
+    assert(tmpl_.getComponent!CFloat);
+    assert(*tmpl_.getComponent!CInt == 1);
+    assert(*tmpl_.getComponent!CFloat == 2.0);
+    
+    Entity* entity = gEM.addEntity(tmpl_);
+    assert(entity.getComponent!CInt);
+    assert(entity.getComponent!CFloat);
+    assert(*entity.getComponent!CInt == 1);
+    assert(*entity.getComponent!CFloat == 2.0);
+}
+
+//allocate templates
+@("AllocateTemplates")
+unittest
+{
+    //basic template allocation
+    ushort[2] ids = [CInt.component_id, CFloat.component_id];
+    EntityTemplate* tmpl_ = gEM.allocateTemplate(ids);
+    assert(tmpl_.info.components.length == 2);
+    assert(tmpl_.getComponent!CInt);
+    assert(tmpl_.getComponent!CFloat);
+    assert(*tmpl_.getComponent!CInt == 1);
+    assert(*tmpl_.getComponent!CFloat == 2.0);
+    *tmpl_.getComponent!CInt = 4;
+    *tmpl_.getComponent!CFloat = 5.0;
+
+    //allocate template from template with additional component
+    ushort[1] ids2 = [CDouble.component_id];
+    EntityTemplate* tmpl_2 = gEM.allocateTemplate(tmpl_, ids2);
+    assert(tmpl_2.info.components.length == 3);
+    assert(tmpl_2.getComponent!CInt);
+    assert(tmpl_2.getComponent!CFloat);
+    assert(tmpl_2.getComponent!CDouble);
+    assert(*tmpl_2.getComponent!CInt == 4);
+    assert(*tmpl_2.getComponent!CFloat == 5.0);
+    assert(*tmpl_2.getComponent!CDouble == 3.0);
+
+    Entity* entity = gEM.addEntity(tmpl_);
+    gEM.addComponents(entity.id, CDouble(8.0));
+
+    //apply entity changes
+    gEM.commit();
+
+    //allocate template as entity copy
+    EntityTemplate* tmpl_3 = gEM.allocateTemplate(entity.id);
+    assert(tmpl_3.info.components.length == 3);
+    assert(tmpl_3.getComponent!CInt);
+    assert(tmpl_3.getComponent!CFloat);
+    assert(tmpl_3.getComponent!CDouble);
+    assert(*tmpl_3.getComponent!CInt == 4);
+    assert(*tmpl_3.getComponent!CFloat == 5.0);
+    assert(*tmpl_3.getComponent!CDouble == 8.0);
+
+    //allocate template with entity data but default values
+    EntityTemplate* tmpl_4 = gEM.allocateTemplate(entity.id, true);
+    assert(tmpl_4.info.components.length == 3);
+    assert(tmpl_4.getComponent!CInt);
+    assert(tmpl_4.getComponent!CFloat);
+    assert(tmpl_4.getComponent!CDouble);
+    assert(*tmpl_4.getComponent!CInt == 1);
+    assert(*tmpl_4.getComponent!CFloat == 2.0);
+    assert(*tmpl_4.getComponent!CDouble == 3.0);
+
+    //allocate template from template with two additional component
+    ushort[2] ids3 = [CDouble.component_id, CLong.component_id];
+    EntityTemplate* tmpl_5 = gEM.allocateTemplate(tmpl_, ids3);
+    assert(tmpl_5.info.components.length == 4);
+    assert(tmpl_5.getComponent!CInt);
+    assert(tmpl_5.getComponent!CFloat);
+    assert(tmpl_5.getComponent!CDouble);
+    assert(tmpl_5.getComponent!CLong);
+    assert(*tmpl_5.getComponent!CInt == 4);
+    assert(*tmpl_5.getComponent!CFloat == 5.0);
+    assert(*tmpl_5.getComponent!CDouble == 3.0);
+    assert(*tmpl_5.getComponent!CLong == 10);
+
+    //allocate template from template without one component
+    ushort[1] rem_ids = [CFloat.component_id];
+    EntityTemplate* tmpl_6 = gEM.allocateTemplate(tmpl_, null, rem_ids);
+    assert(tmpl_6.info.components.length == 1);
+    assert(tmpl_6.getComponent!CInt);
+    assert(*tmpl_6.getComponent!CInt == 4);
+
+    //allocate template from template without one component and two additional
+    EntityTemplate* tmpl_7 = gEM.allocateTemplate(tmpl_, ids3, rem_ids);
+    assert(tmpl_7.info.components.length == 3);
+    assert(tmpl_7.getComponent!CInt);
+    assert(tmpl_7.getComponent!CDouble);
+    assert(tmpl_7.getComponent!CLong);
+    assert(*tmpl_7.getComponent!CInt == 4);
+    assert(*tmpl_7.getComponent!CDouble == 3.0);
+    assert(*tmpl_7.getComponent!CLong == 10);
+
+    gEM.freeTemplate(tmpl_);
+    gEM.freeTemplate(tmpl_2);
+    gEM.freeTemplate(tmpl_3);
+    gEM.freeTemplate(tmpl_4);
+    gEM.freeTemplate(tmpl_5);
+    gEM.freeTemplate(tmpl_6);
+    gEM.freeTemplate(tmpl_7);
+}

tests/runner.d

@@ -130,6 +130,7 @@ struct TestRunner(Args...)
         {
             TestSuite* suite = &suites[i];
             suite.name = module_.stringof;
+            static if(__traits(hasMember, module_, "beforeEveryTest"))module_.beforeEveryTest();
             foreach (index, unittest_; __traits(getUnitTests, module_))
             {
                 enum attributes = __traits(getAttributes, unittest_);
@@ -161,6 +162,7 @@ struct TestRunner(Args...)
             }
             passed += suite.passed;
             failed += suite.failed;
+            static if(__traits(hasMember, module_, "afterEveryTest"))module_.afterEveryTest();
         }
     }