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ea51a67996
Having a list of all enabled/used extensions in meson allows us to get rid of a lot of boilerplate in every bvh build shader. Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35326>
85 lines
3.1 KiB
Text
85 lines
3.1 KiB
Text
/*
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* Copyright © 2024 Valve Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#version 460
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#include "build_helpers.h"
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mat3 abs(mat3 in_mat) {
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return mat3(abs(in_mat[0]), abs(in_mat[1]), abs(in_mat[2]));
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}
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void
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update_instance_aabb(inout vk_aabb instance_aabb, vk_aabb blas_aabb, mat3x4 transform)
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{
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/* https://zeux.io/2010/10/17/aabb-from-obb-with-component-wise-abs */
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vec3 blas_aabb_center = (blas_aabb.max + blas_aabb.min) / 2.0;
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vec3 blas_aabb_extent = (blas_aabb.max - blas_aabb.min) / 2.0;
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blas_aabb_center = vec4(blas_aabb_center, 1.0f) * transform;
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blas_aabb_extent = blas_aabb_extent * abs(mat3(transform));
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instance_aabb.min = min(instance_aabb.min, blas_aabb_center - blas_aabb_extent);
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instance_aabb.max = max(instance_aabb.max, blas_aabb_center + blas_aabb_extent);
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}
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vk_aabb
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calculate_fine_instance_node_bounds(VOID_REF bvh, mat3x4 transform)
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{
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REF(radv_accel_struct_header) header = REF(radv_accel_struct_header)(bvh);
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bvh = OFFSET(bvh, DEREF(header).bvh_offset);
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REF(radv_bvh_box32_node) root = REF(radv_bvh_box32_node)(bvh);
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uint32_t children[4] = DEREF(root).children;
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vk_aabb aabb;
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aabb.min = vec3(INFINITY);
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aabb.max = vec3(-INFINITY);
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if (children[0] == 0xFFFFFFFF) {
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aabb.min = vec3(NAN);
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aabb.max = vec3(NAN);
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}
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for (uint32_t child_idx = 0; child_idx < 4; ++child_idx) {
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if (children[child_idx] == 0xFFFFFFFF)
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break;
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if (id_to_type(children[child_idx]) != radv_bvh_node_box32) {
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update_instance_aabb(aabb, DEREF(root).coords[child_idx], transform);
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continue;
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}
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radv_bvh_box32_node node = DEREF(REF(radv_bvh_box32_node)OFFSET(bvh, id_to_offset(children[child_idx])));
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for (uint32_t grandchild_idx = 0; grandchild_idx < 4; ++grandchild_idx) {
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if (node.children[grandchild_idx] == 0xFFFFFFFF)
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break;
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update_instance_aabb(aabb, node.coords[grandchild_idx], transform);
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}
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}
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return aabb;
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}
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#define CALCULATE_FINE_INSTANCE_NODE_BOUNDS calculate_fine_instance_node_bounds
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#include "leaf.h"
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