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radv: Improve the BVH size estimation

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The previous estimation was from before we had proper LBVH and PLOC.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20988>
This commit is contained in:
Konstantin Seurer 2023-01-30 16:12:28 +01:00 • committed by Marge Bot
parent 03c2bdda60
commit 7e072cfba2
1 changed files with 1 additions and 7 deletions
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8
src/amd/vulkan/radv_acceleration_structure.c
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@ -126,13 +126,7 @@ get_build_layout(struct radv_device *device, uint32_t leaf_count,
const VkAccelerationStructureBuildGeometryInfoKHR *build_info,
struct acceleration_structure_layout *accel_struct, struct scratch_layout *scratch)
{
/* Initialize to 1 to have enought space for the root node. */
uint32_t child_count = leaf_count;
uint32_t internal_count = 1;
while (child_count > 1) {
child_count = DIV_ROUND_UP(child_count, 2);
internal_count += child_count;
}
uint32_t internal_count = MAX2(leaf_count, 2) - 1;
VkGeometryTypeKHR geometry_type = VK_GEOMETRY_TYPE_TRIANGLES_KHR;