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brw/rt: fix ray_object_(direction|origin) for closest-hit shaders

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When closest hit shader is called, the BVH object level
brw_nir_rt_load_mem_ray origin/direction is 0. What we should be using
is the ray origin/direction and apply the transform of the current
instance.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: 9ba7d459a3 ("intel/rt: Implement the new ray-tracing system values")
Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30578>
This commit is contained in:
Lionel Landwerlin 2024-08-08 21:12:30 +03:00 • committed by Marge Bot
parent 7935623126
commit aaff191356
1 changed files with 36 additions and 2 deletions
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34
src/intel/compiler/brw_nir_lower_rt_intrinsics.c
View file

@ -24,6 +24,24 @@
#include "brw_nir_rt.h"
#include "brw_nir_rt_builder.h"
static nir_def *
nir_build_vec3_mat_mult_col_major(nir_builder *b, nir_def *vec,
nir_def *matrix[], bool translation)
{
nir_def *result_components[3] = {
nir_channel(b, matrix[3], 0),
nir_channel(b, matrix[3], 1),
nir_channel(b, matrix[3], 2),
};
for (unsigned i = 0; i < 3; ++i) {
for (unsigned j = 0; j < 3; ++j) {
nir_def *v = nir_fmul(b, nir_channels(b, vec, 1 << j), nir_channels(b, matrix[j], 1 << i));
result_components[i] = (translation || j) ? nir_fadd(b, result_components[i], v) : v;
}
}
return nir_vec(b, result_components, 3);
}
static nir_def *
build_leaf_is_procedural(nir_builder *b, struct brw_nir_rt_mem_hit_defs *hit)
{
@ -163,11 +181,27 @@ lower_rt_intrinsics_impl(nir_function_impl *impl,
break;
case nir_intrinsic_load_ray_object_origin:
if (stage == MESA_SHADER_CLOSEST_HIT) {
struct brw_nir_rt_bvh_instance_leaf_defs leaf;
brw_nir_rt_load_bvh_instance_leaf(b, &leaf, hit_in.inst_leaf_ptr);
sysval = nir_build_vec3_mat_mult_col_major(
b, world_ray_in.orig, leaf.world_to_object, true);
} else {
sysval = object_ray_in.orig;
}
break;
case nir_intrinsic_load_ray_object_direction:
if (stage == MESA_SHADER_CLOSEST_HIT) {
struct brw_nir_rt_bvh_instance_leaf_defs leaf;
brw_nir_rt_load_bvh_instance_leaf(b, &leaf, hit_in.inst_leaf_ptr);
sysval = nir_build_vec3_mat_mult_col_major(
b, world_ray_in.dir, leaf.world_to_object, false);
} else {
sysval = object_ray_in.dir;
}
break;
case nir_intrinsic_load_ray_t_min: