65 lines
2.5 KiB
Odin
65 lines
2.5 KiB
Odin
#+private
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package ecs
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import "core:log"
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ComponentPool :: struct(Component: typeid) {
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data: []Component,
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entity_to_index: map[EntityID]uintptr,
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index_to_entity: map[uintptr]EntityID,
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size: uintptr,
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}
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component_pool_init :: proc(component_pool: ^ComponentPool($Component)) {
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component_pool.data = make([]Component, ENTITY_MAX, context.allocator)
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component_pool.entity_to_index = make(map[EntityID]uintptr, context.allocator)
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component_pool.index_to_entity = make(map[uintptr]EntityID, context.allocator)
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component_pool.size = 0
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}
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component_pool_insert_data :: proc(component_pool: ^ComponentPool($Component), entity_id: EntityID, component: Component) {
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log.assertf(entity_id not_in component_pool.entity_to_index, "Component already added to entity")
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new_idx := component_pool.size
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component_pool.entity_to_index[entity_id] = new_idx
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component_pool.index_to_entity[new_idx] = entity_id
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component_pool.data[new_idx] = component
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component_pool.size += 1
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}
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component_pool_remove_data :: proc(component_pool: ^ComponentPool($Component), entity_id: EntityID) {
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log.assertf(entity_id in component_pool.entity_to_index, "Entity doesn't have component")
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removed_entity_idx := component_pool.entity_to_index[entity_id]
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last_element_idx := component_pool.size - 1
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component_pool.data[removed_entity_idx] = component_pool.data[last_element_idx]
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last_element_entity_id := component_pool.index_to_entity[last_element_idx]
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component_pool.entity_to_index[last_element_entity_id] = removed_entity_idx
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component_pool.index_to_entity[removed_entity_idx] = last_element_entity_id
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delete_key(&component_pool.entity_to_index, entity_id)
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delete_key(&component_pool.index_to_entity, last_element_idx)
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component_pool.size -= 1
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}
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component_pool_get :: proc(component_pool: ^ComponentPool($Component), entity_id: EntityID) -> ^Component {
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log.assertf(entity_id in component_pool.entity_to_index, "Entity doesn't have component")
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idx := component_pool.entity_to_index[entity_id]
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return &component_pool.data[idx]
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}
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component_pool_destroy_entity :: proc(component_pool: ^ComponentPool($Component), entity_id: EntityID) {
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if entity_id in component_pool.entity_to_index {
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component_pool_remove_data(component_pool, entity_id)
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}
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}
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component_pool_delete :: proc(component_pool: ^ComponentPool($Component)) {
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delete(component_pool.data)
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delete(component_pool.entity_to_index)
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delete(component_pool.index_to_entity)
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}
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