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#include "../../include/entity/Entity.hpp"
#include <assert.h>
namespace amalgine {
EntityWorld::EntityWorld() {
for(int i = 0; i < NUM_ENTITIES; ++i) {
mask[i] = ENTITY_MASK_NONE;
transformation[i] = glm::mat4(1.0f);
velocity[i] = glm::vec3(0.0f, 0.0f, 0.0f);
mesh_instance[i] = MeshInstance();
}
}
Entity EntityWorld::create_entity(EntityMask type) {
for(int i = 0; i < NUM_ENTITIES; ++i) {
if(mask[i] == ENTITY_MASK_NONE) {
mask[i] = type;
return i;
}
}
return INVALID_ENTITY;
}
void EntityWorld::remove_entity(Entity entity) {
mask[entity] = ENTITY_MASK_NONE;
}
glm::mat4& EntityWorld::get_transformation(Entity entity) {
assert(mask[entity] & ENTITY_MASK_TRANSFORMATION);
return transformation[entity];
}
glm::vec3& EntityWorld::get_velocity(Entity entity) {
assert(mask[entity] & ENTITY_MASK_VELOCITY);
return velocity[entity];
}
MeshInstance& EntityWorld::get_mesh_instance(Entity entity) {
assert(mask[entity] & ENTITY_MASK_MESH_COMPONENT);
return mesh_instance[entity];
}
void EntityWorld::update() {
const float gravity = -9.8f;
for(int i = 0; i < NUM_ENTITIES; ++i) {
velocity[i].z -= gravity;
}
const EntityMaskType transform_velocity_mask = ENTITY_MASK_TRANSFORMATION | ENTITY_MASK_VELOCITY;
for(int i = 0; i < NUM_ENTITIES; ++i) {
if((mask[i] & transform_velocity_mask) == transform_velocity_mask) {
transformation[i][3].x += velocity[i].x;
transformation[i][3].y += velocity[i].y;
transformation[i][3].z += velocity[i].z;
}
}
for(int i = 0; i < NUM_ENTITIES; ++i) {
mesh_instance[i].update();
}
}
}
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