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~ | TopLevelBVH

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This commit is contained in:
RedShip
2025-01-22 19:33:18 +01:00
parent 594903029f
commit cd65cff03f
10 changed files with 305 additions and 115 deletions
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64
srcs/class/TopBVH.cpp
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@ -1,12 +1,12 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* TopBvh.cpp :+: :+: :+: */
/* TopBVH.cpp :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: TheRed <TheRed@students.42.fr> +#+ +:+ +#+ */
/* By: ycontre <ycontre@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2025/01/21 21:46:45 by TheRed #+# #+# */
/* Updated: 2025/01/21 21:46:45 by TheRed ### ########.fr */
/* Updated: 2025/01/22 19:32:43 by ycontre ### ########.fr */
/* */
/* ************************************************************************** */
@ -54,8 +54,8 @@ float TopBVH::evaluateSah(std::vector<GPUBvhData> &bvhs_data, std::vector<GPUBvh
GPUBvhData bvh_data = bvhs_data[_first_bvh + i];
GPUBvh bvh_root = bvhs[bvh_data.bvh_start_index];
glm::vec3 min = bvh_root.min - bvh_data.offset;
glm::vec3 max = bvh_root.max - bvh_data.offset;
glm::vec3 min = bvh_root.min + bvh_data.offset;
glm::vec3 max = bvh_root.max + bvh_data.offset;
if (min[axis] < pos)
{
@ -117,8 +117,8 @@ void TopBVH::subdivide(std::vector<GPUBvhData> &bvhs_data, std::vector<GPUBvh> &
{
GPUBvhData bvh_data = bvhs_data[i];
GPUBvh root = bvhs[bvh_data.bvh_start_index];
glm::vec3 min = root.min - bvh_data.offset;
glm::vec3 max = root.max - bvh_data.offset;
glm::vec3 min = root.min + bvh_data.offset;
glm::vec3 max = root.max + bvh_data.offset;
glm::vec3 centroid = (min + max) * 0.5f;
if (centroid[axis] < split_pos)
@ -141,4 +141,54 @@ void TopBVH::subdivide(std::vector<GPUBvhData> &bvhs_data, std::vector<GPUBvh> &
_right = new TopBVH(bvhs_data, bvhs, i, _bvh_count - left_count);
_bvh_count = 0;
}
int TopBVH::getSize()
{
int count = 0;
if (_is_leaf)
return (0);
count += 1 + _left->getSize();
count += 1 + _right->getSize();
return (count);
}
void TopBVH::flatten(std::vector<GPUTopBvh> &top_bvhs, int &currentIndex)
{
GPUTopBvh self_top_bvh;
self_top_bvh.is_leaf = _is_leaf;
self_top_bvh.first_bvh_data = _first_bvh;
self_top_bvh.bvh_data_count = _bvh_count;
self_top_bvh.max = _aabb.max;
self_top_bvh.min = _aabb.min;
int self_index = currentIndex++;
self_top_bvh.left_index = -1;
self_top_bvh.right_index = -1;
if (!_is_leaf)
{
self_top_bvh.left_index = currentIndex;
_left->flatten(top_bvhs, currentIndex);
self_top_bvh.right_index = currentIndex;
_right->flatten(top_bvhs, currentIndex);
}
top_bvhs[self_index] = self_top_bvh;
}
std::vector<GPUTopBvh> TopBVH::getGPUTopBvhs()
{
std::vector<GPUTopBvh> bvhs(getSize() + 1);
int currentIndex = 0;
flatten(bvhs, currentIndex);
return (bvhs);
}