diff options
Diffstat (limited to 'src/game/shared/collision.cc')
| -rw-r--r-- | src/game/shared/collision.cc | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/src/game/shared/collision.cc b/src/game/shared/collision.cc deleted file mode 100644 index dd51dd5..0000000 --- a/src/game/shared/collision.cc +++ /dev/null @@ -1,169 +0,0 @@ -#include "shared/pch.hh" - -#include "shared/collision.hh" - -#include "core/constexpr.hh" - -#include "shared/coord.hh" -#include "shared/dimension.hh" -#include "shared/globals.hh" -#include "shared/gravity.hh" -#include "shared/grounded.hh" -#include "shared/transform.hh" -#include "shared/velocity.hh" -#include "shared/voxel_registry.hh" - -static int vgrid_collide(const Dimension* dimension, int d, CollisionComponent& collision, TransformComponent& transform, - VelocityComponent& velocity, voxel_surface& touch_surface) -{ - const auto move = globals::fixed_frametime * velocity.value[d]; - const auto move_sign = vx::sign<int>(move); - - const auto& ref_aabb = collision.aabb; - const auto current_aabb = ref_aabb.push(transform.local); - - auto next_aabb = AABB(current_aabb); - next_aabb.min[d] += move; - next_aabb.max[d] += move; - - local_pos lpos_min; - lpos_min.x = vx::floor<local_pos::value_type>(next_aabb.min.x); - lpos_min.y = vx::floor<local_pos::value_type>(next_aabb.min.y); - lpos_min.z = vx::floor<local_pos::value_type>(next_aabb.min.z); - - local_pos lpos_max; - lpos_max.x = vx::ceil<local_pos::value_type>(next_aabb.max.x); - lpos_max.y = vx::ceil<local_pos::value_type>(next_aabb.max.y); - lpos_max.z = vx::ceil<local_pos::value_type>(next_aabb.max.z); - - // Other axes - const int u = (d + 1) % 3; - const int v = (d + 2) % 3; - - local_pos::value_type ddir; - local_pos::value_type dmin; - local_pos::value_type dmax; - - if(move < 0.0f) { - ddir = local_pos::value_type(+1); - dmin = lpos_min[d]; - dmax = lpos_max[d]; - } else { - ddir = local_pos::value_type(-1); - dmin = lpos_max[d]; - dmax = lpos_min[d]; - } - - voxel_touch latch_touch = voxel_touch::NOTHING; - glm::fvec3 latch_values = glm::fvec3(0.0f, 0.0f, 0.0f); - voxel_surface latch_surface = voxel_surface::UNKNOWN; - AABB latch_vbox; - - for(auto i = dmin; i != dmax; i += ddir) { - for(auto j = lpos_min[u]; j < lpos_max[u]; ++j) - for(auto k = lpos_min[v]; k < lpos_max[v]; ++k) { - local_pos lpos; - lpos[d] = i; - lpos[u] = j; - lpos[v] = k; - - const auto vpos = coord::to_voxel(transform.chunk, lpos); - const auto info = voxel_registry::find(dimension->get_voxel(vpos)); - - if(info == nullptr) { - // Don't collide with something - // that we assume to be nothing - continue; - } - - AABB vbox; - vbox.min = glm::fvec3(lpos); - vbox.max = glm::fvec3(lpos) + 1.0f; - - if(!next_aabb.intersect(vbox)) { - // No intersection between the voxel - // and the entity's collision hull - continue; - } - - if(info->touch_type == voxel_touch::SOLID) { - // Solid touch type makes a collision - // response whenever it is encountered - velocity.value[d] = 0.0f; - touch_surface = info->surface; - return move_sign; - } - - // In case of other touch types, they - // are latched and the last ever touch - // type is then responded to - if(info->touch_type != voxel_touch::NOTHING) { - latch_touch = info->touch_type; - latch_values = info->touch_values; - latch_surface = info->surface; - latch_vbox = vbox; - continue; - } - } - } - - if(latch_touch != voxel_touch::NOTHING) { - if(latch_touch == voxel_touch::BOUNCE) { - const auto move_distance = vx::abs(current_aabb.min[d] - next_aabb.min[d]); - const auto threshold = 2.0f * globals::fixed_frametime; - - if(move_distance > threshold) { - velocity.value[d] *= -latch_values[d]; - } else { - velocity.value[d] = 0.0f; - } - - touch_surface = latch_surface; - - return move_sign; - } - - if(latch_touch == voxel_touch::SINK) { - velocity.value[d] *= latch_values[d]; - touch_surface = latch_surface; - return move_sign; - } - } - - return 0; -} - -void CollisionComponent::fixed_update(Dimension* dimension) -{ - // FIXME: this isn't particularly accurate considering - // some voxels might be passable and some other voxels - // might apply some slowing factor; what I might do in the - // future is to add a specific value to the voxel registry - // entries that would specify the amount of force we apply - // to prevent player movement inside a specific voxel, plus - // we shouldn't treat all voxels as full cubes if we want - // to support slabs, stairs and non-full liquid voxels in the future - - auto group = dimension->entities.group<CollisionComponent>(entt::get<TransformComponent, VelocityComponent>); - - for(auto [entity, collision, transform, velocity] : group.each()) { - auto surface = voxel_surface::UNKNOWN; - auto vertical_move = vgrid_collide(dimension, 1, collision, transform, velocity, surface); - - if(dimension->entities.any_of<GravityComponent>(entity)) { - if(vertical_move == vx::sign<int>(dimension->get_gravity())) { - dimension->entities.emplace_or_replace<GroundedComponent>(entity, GroundedComponent { surface }); - } else { - dimension->entities.remove<GroundedComponent>(entity); - } - } else { - // The entity cannot be grounded because the component - // setup of said entity should not let it comprehend the - // concept of resting on the ground (it flies around) - dimension->entities.remove<GroundedComponent>(entity); - } - - vgrid_collide(dimension, 0, collision, transform, velocity, surface); - vgrid_collide(dimension, 2, collision, transform, velocity, surface); - } -} |