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/*
* Copyright 2011-2016 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "bvh/bvh_unaligned.h"
#include "render/mesh.h"
#include "render/object.h"
#include "bvh/bvh_binning.h"
#include "bvh_params.h"
#include "util/util_boundbox.h"
#include "util/util_transform.h"
CCL_NAMESPACE_BEGIN
BVHUnaligned::BVHUnaligned(const vector<Object *> &objects) : objects_(objects)
{
}
Transform BVHUnaligned::compute_aligned_space(const BVHObjectBinning &range,
const BVHReference *references) const
{
for (int i = range.start(); i < range.end(); ++i) {
const BVHReference &ref = references[i];
Transform aligned_space;
/* Use first primitive which defines correct direction to define
* the orientation space.
*/
if (compute_aligned_space(ref, &aligned_space)) {
return aligned_space;
}
}
return transform_identity();
}
Transform BVHUnaligned::compute_aligned_space(const BVHRange &range,
const BVHReference *references) const
{
for (int i = range.start(); i < range.end(); ++i) {
const BVHReference &ref = references[i];
Transform aligned_space;
/* Use first primitive which defines correct direction to define
* the orientation space.
*/
if (compute_aligned_space(ref, &aligned_space)) {
return aligned_space;
}
}
return transform_identity();
}
bool BVHUnaligned::compute_aligned_space(const BVHReference &ref, Transform *aligned_space) const
{
const Object *object = objects_[ref.prim_object()];
const int packed_type = ref.prim_type();
const int type = (packed_type & PRIMITIVE_ALL);
if (type & PRIMITIVE_CURVE) {
const int curve_index = ref.prim_index();
const int segment = PRIMITIVE_UNPACK_SEGMENT(packed_type);
const Mesh *mesh = object->mesh;
const Mesh::Curve &curve = mesh->get_curve(curve_index);
const int key = curve.first_key + segment;
const float3 v1 = mesh->curve_keys[key], v2 = mesh->curve_keys[key + 1];
float length;
const float3 axis = normalize_len(v2 - v1, &length);
if (length > 1e-6f) {
*aligned_space = make_transform_frame(axis);
return true;
}
}
*aligned_space = transform_identity();
return false;
}
BoundBox BVHUnaligned::compute_aligned_prim_boundbox(const BVHReference &prim,
const Transform &aligned_space) const
{
BoundBox bounds = BoundBox::empty;
const Object *object = objects_[prim.prim_object()];
const int packed_type = prim.prim_type();
const int type = (packed_type & PRIMITIVE_ALL);
if (type & PRIMITIVE_CURVE) {
const int curve_index = prim.prim_index();
const int segment = PRIMITIVE_UNPACK_SEGMENT(packed_type);
const Mesh *mesh = object->mesh;
const Mesh::Curve &curve = mesh->get_curve(curve_index);
curve.bounds_grow(
segment, &mesh->curve_keys[0], &mesh->curve_radius[0], aligned_space, bounds);
}
else {
bounds = prim.bounds().transformed(&aligned_space);
}
return bounds;
}
BoundBox BVHUnaligned::compute_aligned_boundbox(const BVHObjectBinning &range,
const BVHReference *references,
const Transform &aligned_space,
BoundBox *cent_bounds) const
{
BoundBox bounds = BoundBox::empty;
if (cent_bounds != NULL) {
*cent_bounds = BoundBox::empty;
}
for (int i = range.start(); i < range.end(); ++i) {
const BVHReference &ref = references[i];
BoundBox ref_bounds = compute_aligned_prim_boundbox(ref, aligned_space);
bounds.grow(ref_bounds);
if (cent_bounds != NULL) {
cent_bounds->grow(ref_bounds.center2());
}
}
return bounds;
}
BoundBox BVHUnaligned::compute_aligned_boundbox(const BVHRange &range,
const BVHReference *references,
const Transform &aligned_space,
BoundBox *cent_bounds) const
{
BoundBox bounds = BoundBox::empty;
if (cent_bounds != NULL) {
*cent_bounds = BoundBox::empty;
}
for (int i = range.start(); i < range.end(); ++i) {
const BVHReference &ref = references[i];
BoundBox ref_bounds = compute_aligned_prim_boundbox(ref, aligned_space);
bounds.grow(ref_bounds);
if (cent_bounds != NULL) {
cent_bounds->grow(ref_bounds.center2());
}
}
return bounds;
}
Transform BVHUnaligned::compute_node_transform(const BoundBox &bounds,
const Transform &aligned_space)
{
Transform space = aligned_space;
space.x.w -= bounds.min.x;
space.y.w -= bounds.min.y;
space.z.w -= bounds.min.z;
float3 dim = bounds.max - bounds.min;
return transform_scale(
1.0f / max(1e-18f, dim.x), 1.0f / max(1e-18f, dim.y), 1.0f / max(1e-18f, dim.z)) *
space;
}
CCL_NAMESPACE_END
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