asgardius/virtualx-engine
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
virtualx-engine/scene/3d/voxel_light_baker.cpp
Rémi Verschelde 1426cd3b3a
One Copyright Update to rule them all 
As many open source projects have started doing it, we're removing the
current year from the copyright notice, so that we don't need to bump
it every year.

It seems like only the first year of publication is technically
relevant for copyright notices, and even that seems to be something
that many companies stopped listing altogether (in a version controlled
codebase, the commits are a much better source of date of publication
than a hardcoded copyright statement).

We also now list Godot Engine contributors first as we're collectively
the current maintainers of the project, and we clarify that the
"exclusive" copyright of the co-founders covers the timespan before
opensourcing (their further contributions are included as part of Godot
Engine contributors).

Also fixed "cf." Frenchism - it's meant as "refer to / see".

Backported from #70885.
2023-01-10 15:26:54 +01:00

1598 lines
47 KiB
C++
Raw Blame History

/**************************************************************************/
/* voxel_light_baker.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#include "voxel_light_baker.h"
#include "core/os/os.h"
#include "core/os/threaded_array_processor.h"
#include <stdlib.h>
#define FINDMINMAX(x0, x1, x2, min, max) \
min = max = x0; \
if (x1 < min) \
min = x1; \
if (x1 > max) \
max = x1; \
if (x2 < min) \
min = x2; \
if (x2 > max) \
max = x2;
static bool planeBoxOverlap(Vector3 normal, float d, Vector3 maxbox) {
int q;
Vector3 vmin, vmax;
for (q = 0; q <= 2; q++) {
if (normal[q] > 0.0f) {
vmin[q] = -maxbox[q];
vmax[q] = maxbox[q];
} else {
vmin[q] = maxbox[q];
vmax[q] = -maxbox[q];
}
}
if (normal.dot(vmin) + d > 0.0f) {
return false;
}
if (normal.dot(vmax) + d >= 0.0f) {
return true;
}
return false;
}
/*======================== X-tests ========================*/
#define AXISTEST_X01(a, b, fa, fb) \
p0 = a * v0.y - b * v0.z; \
p2 = a * v2.y - b * v2.z; \
if (p0 < p2) { \
min = p0; \
max = p2; \
} else { \
min = p2; \
max = p0; \
} \
rad = fa * boxhalfsize.y + fb * boxhalfsize.z; \
if (min > rad || max < -rad) \
return false;
#define AXISTEST_X2(a, b, fa, fb) \
p0 = a * v0.y - b * v0.z; \
p1 = a * v1.y - b * v1.z; \
if (p0 < p1) { \
min = p0; \
max = p1; \
} else { \
min = p1; \
max = p0; \
} \
rad = fa * boxhalfsize.y + fb * boxhalfsize.z; \
if (min > rad || max < -rad) \
return false;
/*======================== Y-tests ========================*/
#define AXISTEST_Y02(a, b, fa, fb) \
p0 = -a * v0.x + b * v0.z; \
p2 = -a * v2.x + b * v2.z; \
if (p0 < p2) { \
min = p0; \
max = p2; \
} else { \
min = p2; \
max = p0; \
} \
rad = fa * boxhalfsize.x + fb * boxhalfsize.z; \
if (min > rad || max < -rad) \
return false;
#define AXISTEST_Y1(a, b, fa, fb) \
p0 = -a * v0.x + b * v0.z; \
p1 = -a * v1.x + b * v1.z; \
if (p0 < p1) { \
min = p0; \
max = p1; \
} else { \
min = p1; \
max = p0; \
} \
rad = fa * boxhalfsize.x + fb * boxhalfsize.z; \
if (min > rad || max < -rad) \
return false;
/*======================== Z-tests ========================*/
#define AXISTEST_Z12(a, b, fa, fb) \
p1 = a * v1.x - b * v1.y; \
p2 = a * v2.x - b * v2.y; \
if (p2 < p1) { \
min = p2; \
max = p1; \
} else { \
min = p1; \
max = p2; \
} \
rad = fa * boxhalfsize.x + fb * boxhalfsize.y; \
if (min > rad || max < -rad) \
return false;
#define AXISTEST_Z0(a, b, fa, fb) \
p0 = a * v0.x - b * v0.y; \
p1 = a * v1.x - b * v1.y; \
if (p0 < p1) { \
min = p0; \
max = p1; \
} else { \
min = p1; \
max = p0; \
} \
rad = fa * boxhalfsize.x + fb * boxhalfsize.y; \
if (min > rad || max < -rad) \
return false;
static bool fast_tri_box_overlap(const Vector3 &boxcenter, const Vector3 boxhalfsize, const Vector3 *triverts) {
/* use separating axis theorem to test overlap between triangle and box */
/* need to test for overlap in these directions: */
/* 1) the {x,y,z}-directions (actually, since we use the AABB of the triangle */
/* we do not even need to test these) */
/* 2) normal of the triangle */
/* 3) crossproduct(edge from tri, {x,y,z}-directin) */
/* this gives 3x3=9 more tests */
Vector3 v0, v1, v2;
float min, max, d, p0, p1, p2, rad, fex, fey, fez;
Vector3 normal, e0, e1, e2;
/* This is the fastest branch on Sun */
/* move everything so that the boxcenter is in (0,0,0) */
v0 = triverts[0] - boxcenter;
v1 = triverts[1] - boxcenter;
v2 = triverts[2] - boxcenter;
/* compute triangle edges */
e0 = v1 - v0; /* tri edge 0 */
e1 = v2 - v1; /* tri edge 1 */
e2 = v0 - v2; /* tri edge 2 */
/* Bullet 3: */
/* test the 9 tests first (this was faster) */
fex = Math::abs(e0.x);
fey = Math::abs(e0.y);
fez = Math::abs(e0.z);
AXISTEST_X01(e0.z, e0.y, fez, fey);
AXISTEST_Y02(e0.z, e0.x, fez, fex);
AXISTEST_Z12(e0.y, e0.x, fey, fex);
fex = Math::abs(e1.x);
fey = Math::abs(e1.y);
fez = Math::abs(e1.z);
AXISTEST_X01(e1.z, e1.y, fez, fey);
AXISTEST_Y02(e1.z, e1.x, fez, fex);
AXISTEST_Z0(e1.y, e1.x, fey, fex);
fex = Math::abs(e2.x);
fey = Math::abs(e2.y);
fez = Math::abs(e2.z);
AXISTEST_X2(e2.z, e2.y, fez, fey);
AXISTEST_Y1(e2.z, e2.x, fez, fex);
AXISTEST_Z12(e2.y, e2.x, fey, fex);
/* Bullet 1: */
/* first test overlap in the {x,y,z}-directions */
/* find min, max of the triangle each direction, and test for overlap in */
/* that direction -- this is equivalent to testing a minimal AABB around */
/* the triangle against the AABB */
/* test in X-direction */
FINDMINMAX(v0.x, v1.x, v2.x, min, max);
if (min > boxhalfsize.x || max < -boxhalfsize.x) {
return false;
}
/* test in Y-direction */
FINDMINMAX(v0.y, v1.y, v2.y, min, max);
if (min > boxhalfsize.y || max < -boxhalfsize.y) {
return false;
}
/* test in Z-direction */
FINDMINMAX(v0.z, v1.z, v2.z, min, max);
if (min > boxhalfsize.z || max < -boxhalfsize.z) {
return false;
}
/* Bullet 2: */
/* test if the box intersects the plane of the triangle */
/* compute plane equation of triangle: normal*x+d=0 */
normal = e0.cross(e1);
d = -normal.dot(v0); /* plane eq: normal.x+d=0 */
return planeBoxOverlap(normal, d, boxhalfsize); /* if true, box and triangle overlaps */
}
static _FORCE_INLINE_ void get_uv_and_normal(const Vector3 &p_pos, const Vector3 *p_vtx, const Vector2 *p_uv, const Vector3 *p_normal, Vector2 &r_uv, Vector3 &r_normal) {
if (p_pos.distance_squared_to(p_vtx[0]) < CMP_EPSILON2) {
r_uv = p_uv[0];
r_normal = p_normal[0];
return;
}
if (p_pos.distance_squared_to(p_vtx[1]) < CMP_EPSILON2) {
r_uv = p_uv[1];
r_normal = p_normal[1];
return;
}
if (p_pos.distance_squared_to(p_vtx[2]) < CMP_EPSILON2) {
r_uv = p_uv[2];
r_normal = p_normal[2];
return;
}
Vector3 v0 = p_vtx[1] - p_vtx[0];
Vector3 v1 = p_vtx[2] - p_vtx[0];
Vector3 v2 = p_pos - p_vtx[0];
float d00 = v0.dot(v0);
float d01 = v0.dot(v1);
float d11 = v1.dot(v1);
float d20 = v2.dot(v0);
float d21 = v2.dot(v1);
float denom = (d00 * d11 - d01 * d01);
if (denom == 0) {
r_uv = p_uv[0];
r_normal = p_normal[0];
return;
}
float v = (d11 * d20 - d01 * d21) / denom;
float w = (d00 * d21 - d01 * d20) / denom;
float u = 1.0f - v - w;
r_uv = p_uv[0] * u + p_uv[1] * v + p_uv[2] * w;
r_normal = (p_normal[0] * u + p_normal[1] * v + p_normal[2] * w).normalized();
}
void VoxelLightBaker::_plot_face(int p_idx, int p_level, int p_x, int p_y, int p_z, const Vector3 *p_vtx, const Vector3 *p_normal, const Vector2 *p_uv, const MaterialCache &p_material, const AABB &p_aabb) {
if (p_level == cell_subdiv - 1) {
//plot the face by guessing its albedo and emission value
//find best axis to map to, for scanning values
int closest_axis = 0;
float closest_dot = 0;
Plane plane = Plane(p_vtx[0], p_vtx[1], p_vtx[2]);
Vector3 normal = plane.normal;
for (int i = 0; i < 3; i++) {
Vector3 axis;
axis[i] = 1.0;
float dot = ABS(normal.dot(axis));
if (i == 0 || dot > closest_dot) {
closest_axis = i;
closest_dot = dot;
}
}
Vector3 axis;
axis[closest_axis] = 1.0;
Vector3 t1;
t1[(closest_axis + 1) % 3] = 1.0;
Vector3 t2;
t2[(closest_axis + 2) % 3] = 1.0;
t1 *= p_aabb.size[(closest_axis + 1) % 3] / float(color_scan_cell_width);
t2 *= p_aabb.size[(closest_axis + 2) % 3] / float(color_scan_cell_width);
Color albedo_accum;
Color emission_accum;
Vector3 normal_accum;
float alpha = 0.0;
//map to a grid average in the best axis for this face
for (int i = 0; i < color_scan_cell_width; i++) {
Vector3 ofs_i = float(i) * t1;
for (int j = 0; j < color_scan_cell_width; j++) {
Vector3 ofs_j = float(j) * t2;
Vector3 from = p_aabb.position + ofs_i + ofs_j;
Vector3 to = from + t1 + t2 + axis * p_aabb.size[closest_axis];
Vector3 half = (to - from) * 0.5;
//is in this cell?
if (!fast_tri_box_overlap(from + half, half, p_vtx)) {
continue; //face does not span this cell
}
//go from -size to +size*2 to avoid skipping collisions
Vector3 ray_from = from + (t1 + t2) * 0.5 - axis * p_aabb.size[closest_axis];
Vector3 ray_to = ray_from + axis * p_aabb.size[closest_axis] * 2;
if (normal.dot(ray_from - ray_to) < 0) {
SWAP(ray_from, ray_to);
}
Vector3 intersection;
if (!plane.intersects_segment(ray_from, ray_to, &intersection)) {
if (ABS(plane.distance_to(ray_from)) < ABS(plane.distance_to(ray_to))) {
intersection = plane.project(ray_from);
} else {
intersection = plane.project(ray_to);
}
}
intersection = Face3(p_vtx[0], p_vtx[1], p_vtx[2]).get_closest_point_to(intersection);
Vector2 uv;
Vector3 lnormal;
get_uv_and_normal(intersection, p_vtx, p_uv, p_normal, uv, lnormal);
if (lnormal == Vector3()) { //just in case normal as nor provided
lnormal = normal;
}
int uv_x = CLAMP(int(Math::fposmod(uv.x, 1.0f) * bake_texture_size), 0, bake_texture_size - 1);
int uv_y = CLAMP(int(Math::fposmod(uv.y, 1.0f) * bake_texture_size), 0, bake_texture_size - 1);
int ofs = uv_y * bake_texture_size + uv_x;
albedo_accum.r += p_material.albedo[ofs].r;
albedo_accum.g += p_material.albedo[ofs].g;
albedo_accum.b += p_material.albedo[ofs].b;
albedo_accum.a += p_material.albedo[ofs].a;
emission_accum.r += p_material.emission[ofs].r;
emission_accum.g += p_material.emission[ofs].g;
emission_accum.b += p_material.emission[ofs].b;
normal_accum += lnormal;
alpha += 1.0;
}
}
if (alpha == 0) {
//could not in any way get texture information.. so use closest point to center
Face3 f(p_vtx[0], p_vtx[1], p_vtx[2]);
Vector3 inters = f.get_closest_point_to(p_aabb.position + p_aabb.size * 0.5);
Vector3 lnormal;
Vector2 uv;
get_uv_and_normal(inters, p_vtx, p_uv, p_normal, uv, normal);
if (lnormal == Vector3()) { //just in case normal as nor provided
lnormal = normal;
}
int uv_x = CLAMP(Math::fposmod(uv.x, 1.0f) * bake_texture_size, 0, bake_texture_size - 1);
int uv_y = CLAMP(Math::fposmod(uv.y, 1.0f) * bake_texture_size, 0, bake_texture_size - 1);
int ofs = uv_y * bake_texture_size + uv_x;
alpha = 1.0 / (color_scan_cell_width * color_scan_cell_width);
albedo_accum.r = p_material.albedo[ofs].r * alpha;
albedo_accum.g = p_material.albedo[ofs].g * alpha;
albedo_accum.b = p_material.albedo[ofs].b * alpha;
albedo_accum.a = p_material.albedo[ofs].a * alpha;
emission_accum.r = p_material.emission[ofs].r * alpha;
emission_accum.g = p_material.emission[ofs].g * alpha;
emission_accum.b = p_material.emission[ofs].b * alpha;
normal_accum = lnormal * alpha;
} else {
float accdiv = 1.0 / (color_scan_cell_width * color_scan_cell_width);
alpha *= accdiv;
albedo_accum.r *= accdiv;
albedo_accum.g *= accdiv;
albedo_accum.b *= accdiv;
albedo_accum.a *= accdiv;
emission_accum.r *= accdiv;
emission_accum.g *= accdiv;
emission_accum.b *= accdiv;
normal_accum *= accdiv;
}
//put this temporarily here, corrected in a later step
bake_cells.write[p_idx].albedo[0] += albedo_accum.r;
bake_cells.write[p_idx].albedo[1] += albedo_accum.g;
bake_cells.write[p_idx].albedo[2] += albedo_accum.b;
bake_cells.write[p_idx].emission[0] += emission_accum.r;
bake_cells.write[p_idx].emission[1] += emission_accum.g;
bake_cells.write[p_idx].emission[2] += emission_accum.b;
bake_cells.write[p_idx].normal[0] += normal_accum.x;
bake_cells.write[p_idx].normal[1] += normal_accum.y;
bake_cells.write[p_idx].normal[2] += normal_accum.z;
bake_cells.write[p_idx].alpha += alpha;
} else {
//go down
int half = (1 << (cell_subdiv - 1)) >> (p_level + 1);
for (int i = 0; i < 8; i++) {
AABB aabb = p_aabb;
aabb.size *= 0.5;
int nx = p_x;
int ny = p_y;
int nz = p_z;
if (i & 1) {
aabb.position.x += aabb.size.x;
nx += half;
}
if (i & 2) {
aabb.position.y += aabb.size.y;
ny += half;
}
if (i & 4) {
aabb.position.z += aabb.size.z;
nz += half;
}
//make sure to not plot beyond limits
if (nx < 0 || nx >= axis_cell_size[0] || ny < 0 || ny >= axis_cell_size[1] || nz < 0 || nz >= axis_cell_size[2]) {
continue;
}
{
AABB test_aabb = aabb;
//test_aabb.grow_by(test_aabb.get_longest_axis_size()*0.05); //grow a bit to avoid numerical error in real-time
Vector3 qsize = test_aabb.size * 0.5; //quarter size, for fast aabb test
if (!fast_tri_box_overlap(test_aabb.position + qsize, qsize, p_vtx)) {
//if (!Face3(p_vtx[0],p_vtx[1],p_vtx[2]).intersects_aabb2(aabb)) {
//does not fit in child, go on
continue;
}
}
if (bake_cells[p_idx].children[i] == CHILD_EMPTY) {
//sub cell must be created
uint32_t child_idx = bake_cells.size();
bake_cells.write[p_idx].children[i] = child_idx;
bake_cells.resize(bake_cells.size() + 1);
bake_cells.write[child_idx].level = p_level + 1;
}
_plot_face(bake_cells[p_idx].children[i], p_level + 1, nx, ny, nz, p_vtx, p_normal, p_uv, p_material, aabb);
}
}
}
Vector<Color> VoxelLightBaker::_get_bake_texture(Ref<Image> p_image, const Color &p_color_mul, const Color &p_color_add) {
Vector<Color> ret;
if (p_image.is_null() || p_image->empty()) {
ret.resize(bake_texture_size * bake_texture_size);
for (int i = 0; i < bake_texture_size * bake_texture_size; i++) {
ret.write[i] = p_color_add;
}
return ret;
}
p_image = p_image->duplicate();
if (p_image->is_compressed()) {
p_image->decompress();
}
p_image->convert(Image::FORMAT_RGBA8);
p_image->resize(bake_texture_size, bake_texture_size, Image::INTERPOLATE_CUBIC);
PoolVector<uint8_t>::Read r = p_image->get_data().read();
ret.resize(bake_texture_size * bake_texture_size);
for (int i = 0; i < bake_texture_size * bake_texture_size; i++) {
Color c;
c.r = (r[i * 4 + 0] / 255.0) * p_color_mul.r + p_color_add.r;
c.g = (r[i * 4 + 1] / 255.0) * p_color_mul.g + p_color_add.g;
c.b = (r[i * 4 + 2] / 255.0) * p_color_mul.b + p_color_add.b;
c.a = r[i * 4 + 3] / 255.0;
ret.write[i] = c;
}
return ret;
}
VoxelLightBaker::MaterialCache VoxelLightBaker::_get_material_cache(Ref<Material> p_material) {
//this way of obtaining materials is inaccurate and also does not support some compressed formats very well
Ref<SpatialMaterial> mat = p_material;
Ref<Material> material = mat; //hack for now
if (material_cache.has(material)) {
return material_cache[material];
}
MaterialCache mc;
Ref<Image> empty;
if (mat.is_valid()) {
Ref<Texture> albedo_tex = mat->get_texture(SpatialMaterial::TEXTURE_ALBEDO);
Ref<Image> img_albedo;
if (albedo_tex.is_valid()) {
img_albedo = albedo_tex->get_data();
mc.albedo = _get_bake_texture(img_albedo, mat->get_albedo(), Color(0, 0, 0)); // albedo texture, color is multiplicative
} else {
mc.albedo = _get_bake_texture(img_albedo, Color(1, 1, 1), mat->get_albedo()); // no albedo texture, color is additive
}
if (mat->get_feature(SpatialMaterial::FEATURE_EMISSION)) {
Ref<Texture> emission_tex = mat->get_texture(SpatialMaterial::TEXTURE_EMISSION);
Color emission_col = mat->get_emission();
float emission_energy = mat->get_emission_energy();
Ref<Image> img_emission;
if (emission_tex.is_valid()) {
img_emission = emission_tex->get_data();
}
if (mat->get_emission_operator() == SpatialMaterial::EMISSION_OP_ADD) {
mc.emission = _get_bake_texture(img_emission, Color(1, 1, 1) * emission_energy, emission_col * emission_energy);
} else {
mc.emission = _get_bake_texture(img_emission, emission_col * emission_energy, Color(0, 0, 0));
}
} else {
mc.emission = _get_bake_texture(empty, Color(0, 0, 0), Color(0, 0, 0));
}
} else {
mc.albedo = _get_bake_texture(empty, Color(0, 0, 0), Color(1, 1, 1));
mc.emission = _get_bake_texture(empty, Color(0, 0, 0), Color(0, 0, 0));
}
material_cache[p_material] = mc;
return mc;
}
void VoxelLightBaker::plot_mesh(const Transform &p_xform, Ref<Mesh> &p_mesh, const Vector<Ref<Material>> &p_materials, const Ref<Material> &p_override_material) {
for (int i = 0; i < p_mesh->get_surface_count(); i++) {
if (p_mesh->surface_get_primitive_type(i) != Mesh::PRIMITIVE_TRIANGLES) {
continue; //only triangles
}
Ref<Material> src_material;
if (p_override_material.is_valid()) {
src_material = p_override_material;
} else if (i < p_materials.size() && p_materials[i].is_valid()) {
src_material = p_materials[i];
} else {
src_material = p_mesh->surface_get_material(i);
}
MaterialCache material = _get_material_cache(src_material);
Array a = p_mesh->surface_get_arrays(i);
PoolVector<Vector3> vertices = a[Mesh::ARRAY_VERTEX];
PoolVector<Vector3>::Read vr = vertices.read();
PoolVector<Vector2> uv = a[Mesh::ARRAY_TEX_UV];
PoolVector<Vector2>::Read uvr;
PoolVector<Vector3> normals = a[Mesh::ARRAY_NORMAL];
PoolVector<Vector3>::Read nr;
PoolVector<int> index = a[Mesh::ARRAY_INDEX];
bool read_uv = false;
bool read_normals = false;
if (uv.size()) {
uvr = uv.read();
read_uv = true;
}
if (normals.size()) {
read_normals = true;
nr = normals.read();
}
if (index.size()) {
int facecount = index.size() / 3;
PoolVector<int>::Read ir = index.read();
for (int j = 0; j < facecount; j++) {
Vector3 vtxs[3];
Vector2 uvs[3];
Vector3 normal[3];
for (int k = 0; k < 3; k++) {
vtxs[k] = p_xform.xform(vr[ir[j * 3 + k]]);
}
if (read_uv) {
for (int k = 0; k < 3; k++) {
uvs[k] = uvr[ir[j * 3 + k]];
}
}
if (read_normals) {
for (int k = 0; k < 3; k++) {
normal[k] = nr[ir[j * 3 + k]];
}
}
//test against original bounds
if (!fast_tri_box_overlap(original_bounds.position + original_bounds.size * 0.5, original_bounds.size * 0.5, vtxs)) {
continue;
}
//plot
_plot_face(0, 0, 0, 0, 0, vtxs, normal, uvs, material, po2_bounds);
}
} else {
int facecount = vertices.size() / 3;
for (int j = 0; j < facecount; j++) {
Vector3 vtxs[3];
Vector2 uvs[3];
Vector3 normal[3];
for (int k = 0; k < 3; k++) {
vtxs[k] = p_xform.xform(vr[j * 3 + k]);
}
if (read_uv) {
for (int k = 0; k < 3; k++) {
uvs[k] = uvr[j * 3 + k];
}
}
if (read_normals) {
for (int k = 0; k < 3; k++) {
normal[k] = nr[j * 3 + k];
}
}
//test against original bounds
if (!fast_tri_box_overlap(original_bounds.position + original_bounds.size * 0.5, original_bounds.size * 0.5, vtxs)) {
continue;
}
//plot face
_plot_face(0, 0, 0, 0, 0, vtxs, normal, uvs, material, po2_bounds);
}
}
}
max_original_cells = bake_cells.size();
}
void VoxelLightBaker::_init_light_plot(int p_idx, int p_level, int p_x, int p_y, int p_z, uint32_t p_parent) {
bake_light.write[p_idx].x = p_x;
bake_light.write[p_idx].y = p_y;
bake_light.write[p_idx].z = p_z;
if (p_level == cell_subdiv - 1) {
bake_light.write[p_idx].next_leaf = first_leaf;
first_leaf = p_idx;
} else {
//go down
int half = (1 << (cell_subdiv - 1)) >> (p_level + 1);
for (int i = 0; i < 8; i++) {
uint32_t child = bake_cells[p_idx].children[i];
if (child == CHILD_EMPTY) {
continue;
}
int nx = p_x;
int ny = p_y;
int nz = p_z;
if (i & 1) {
nx += half;
}
if (i & 2) {
ny += half;
}
if (i & 4) {
nz += half;
}
_init_light_plot(child, p_level + 1, nx, ny, nz, p_idx);
}
}
}
void VoxelLightBaker::begin_bake_light(BakeQuality p_quality, float p_propagation) {
_check_init_light();
propagation = p_propagation;
bake_quality = p_quality;
}
void VoxelLightBaker::_check_init_light() {
if (bake_light.size() == 0) {
direct_lights_baked = false;
leaf_voxel_count = 0;
_fixup_plot(0, 0); //pre fixup, so normal, albedo, emission, etc. work for lighting.
bake_light.resize(bake_cells.size());
//memset(bake_light.ptrw(), 0, bake_light.size() * sizeof(Light));
first_leaf = -1;
_init_light_plot(0, 0, 0, 0, 0, CHILD_EMPTY);
}
}
static float _get_normal_advance(const Vector3 &p_normal) {
Vector3 normal = p_normal;
Vector3 unorm = normal.abs();
if ((unorm.x >= unorm.y) && (unorm.x >= unorm.z)) {
// x code
unorm = normal.x > 0.0 ? Vector3(1.0, 0.0, 0.0) : Vector3(-1.0, 0.0, 0.0);
} else if ((unorm.y > unorm.x) && (unorm.y >= unorm.z)) {
// y code
unorm = normal.y > 0.0 ? Vector3(0.0, 1.0, 0.0) : Vector3(0.0, -1.0, 0.0);
} else if ((unorm.z > unorm.x) && (unorm.z > unorm.y)) {
// z code
unorm = normal.z > 0.0 ? Vector3(0.0, 0.0, 1.0) : Vector3(0.0, 0.0, -1.0);
} else {
// oh-no we messed up code
// has to be
unorm = Vector3(1.0, 0.0, 0.0);
}
return 1.0 / normal.dot(unorm);
}
static const Vector3 aniso_normal[6] = {
Vector3(-1, 0, 0),
Vector3(1, 0, 0),
Vector3(0, -1, 0),
Vector3(0, 1, 0),
Vector3(0, 0, -1),
Vector3(0, 0, 1)
};
uint32_t VoxelLightBaker::_find_cell_at_pos(const Cell *cells, int x, int y, int z) {
uint32_t cell = 0;
int ofs_x = 0;
int ofs_y = 0;
int ofs_z = 0;
int size = 1 << (cell_subdiv - 1);
int half = size / 2;
if (x < 0 || x >= size) {
return -1;
}
if (y < 0 || y >= size) {
return -1;
}
if (z < 0 || z >= size) {
return -1;
}
for (int i = 0; i < cell_subdiv - 1; i++) {
const Cell *bc = &cells[cell];
int child = 0;
if (x >= ofs_x + half) {
child |= 1;
ofs_x += half;
}
if (y >= ofs_y + half) {
child |= 2;
ofs_y += half;
}
if (z >= ofs_z + half) {
child |= 4;
ofs_z += half;
}
cell = bc->children[child];
if (cell == CHILD_EMPTY) {
return CHILD_EMPTY;
}
half >>= 1;
}
return cell;
}
void VoxelLightBaker::plot_light_directional(const Vector3 &p_direction, const Color &p_color, float p_energy, float p_indirect_energy, bool p_direct) {
_check_init_light();
float max_len = Vector3(axis_cell_size[0], axis_cell_size[1], axis_cell_size[2]).length() * 1.1;
if (p_direct) {
direct_lights_baked = true;
}
Vector3 light_axis = p_direction;
Plane clip[3];
int clip_planes = 0;
Light *light_data = bake_light.ptrw();
const Cell *cells = bake_cells.ptr();
for (int i = 0; i < 3; i++) {
if (Math::is_zero_approx(light_axis[i])) {
continue;
}
clip[clip_planes].normal[i] = 1.0;
if (light_axis[i] < 0) {
clip[clip_planes].d = axis_cell_size[i] + 1;
} else {
clip[clip_planes].d -= 1.0;
}
clip_planes++;
}
float distance_adv = _get_normal_advance(light_axis);
Vector3 light_energy = Vector3(p_color.r, p_color.g, p_color.b) * p_energy * p_indirect_energy;
int idx = first_leaf;
while (idx >= 0) {
Light *light = &light_data[idx];
Vector3 to(light->x + 0.5, light->y + 0.5, light->z + 0.5);
to += -light_axis.sign() * 0.47; //make it more likely to receive a ray
Vector3 from = to - max_len * light_axis;
for (int j = 0; j < clip_planes; j++) {
clip[j].intersects_segment(from, to, &from);
}
float distance = (to - from).length();
distance += distance_adv - Math::fmod(distance, distance_adv); //make it reach the center of the box always
from = to - light_axis * distance;
uint32_t result = 0xFFFFFFFF;
while (distance > -distance_adv) { //use this to avoid precision errors
result = _find_cell_at_pos(cells, int(floor(from.x)), int(floor(from.y)), int(floor(from.z)));
if (result != 0xFFFFFFFF) {
break;
}
from += light_axis * distance_adv;
distance -= distance_adv;
}
if (result == (uint32_t)idx) {
//cell hit itself! hooray!
Vector3 normal(cells[idx].normal[0], cells[idx].normal[1], cells[idx].normal[2]);
if (normal == Vector3()) {
for (int i = 0; i < 6; i++) {
light->accum[i][0] += light_energy.x * cells[idx].albedo[0];
light->accum[i][1] += light_energy.y * cells[idx].albedo[1];
light->accum[i][2] += light_energy.z * cells[idx].albedo[2];
}
} else {
for (int i = 0; i < 6; i++) {
float s = MAX(0.0, aniso_normal[i].dot(-normal));
light->accum[i][0] += light_energy.x * cells[idx].albedo[0] * s;
light->accum[i][1] += light_energy.y * cells[idx].albedo[1] * s;
light->accum[i][2] += light_energy.z * cells[idx].albedo[2] * s;
}
}
if (p_direct) {
for (int i = 0; i < 6; i++) {
float s = MAX(0.0, aniso_normal[i].dot(-light_axis)); //light depending on normal for direct
light->direct_accum[i][0] += light_energy.x * s;
light->direct_accum[i][1] += light_energy.y * s;
light->direct_accum[i][2] += light_energy.z * s;
}
}
}
idx = light_data[idx].next_leaf;
}
}
void VoxelLightBaker::plot_light_omni(const Vector3 &p_pos, const Color &p_color, float p_energy, float p_indirect_energy, float p_radius, float p_attenutation, bool p_direct) {
_check_init_light();
if (p_direct) {
direct_lights_baked = true;
}
Plane clip[3];
int clip_planes = 0;
// uint64_t us = OS::get_singleton()->get_ticks_usec();
Vector3 light_pos = to_cell_space.xform(p_pos) + Vector3(0.5, 0.5, 0.5);
//Vector3 spot_axis = -light_cache.transform.basis.get_axis(2).normalized();
float local_radius = to_cell_space.basis.xform(Vector3(0, 0, 1)).length() * p_radius;
Light *light_data = bake_light.ptrw();
const Cell *cells = bake_cells.ptr();
Vector3 light_energy = Vector3(p_color.r, p_color.g, p_color.b) * p_energy * p_indirect_energy;
int idx = first_leaf;
while (idx >= 0) {
Light *light = &light_data[idx];
Vector3 to(light->x + 0.5, light->y + 0.5, light->z + 0.5);
to += (light_pos - to).sign() * 0.47; //make it more likely to receive a ray
Vector3 light_axis = (to - light_pos).normalized();
float distance_adv = _get_normal_advance(light_axis);
Vector3 normal(cells[idx].normal[0], cells[idx].normal[1], cells[idx].normal[2]);
if (normal != Vector3() && normal.dot(-light_axis) < 0.001) {
idx = light_data[idx].next_leaf;
continue;
}
float att = 1.0;
{
float d = light_pos.distance_to(to);
if (d + distance_adv > local_radius) {
idx = light_data[idx].next_leaf;
continue; // too far away
}
float dt = CLAMP((d + distance_adv) / local_radius, 0, 1);
att *= powf(1.0 - dt, p_attenutation);
}
clip_planes = 0;
for (int c = 0; c < 3; c++) {
if (Math::is_zero_approx(light_axis[c])) {
continue;
}
clip[clip_planes].normal[c] = 1.0;
if (light_axis[c] < 0) {
clip[clip_planes].d = (1 << (cell_subdiv - 1)) + 1;
} else {
clip[clip_planes].d -= 1.0;
}
clip_planes++;
}
Vector3 from = light_pos;
for (int j = 0; j < clip_planes; j++) {
clip[j].intersects_segment(from, to, &from);
}
float distance = (to - from).length();
distance -= Math::fmod(distance, distance_adv); //make it reach the center of the box always, but this tame make it closer
from = to - light_axis * distance;
to += (light_pos - to).sign() * 0.47; //make it more likely to receive a ray
uint32_t result = 0xFFFFFFFF;
while (distance > -distance_adv) { //use this to avoid precision errors
result = _find_cell_at_pos(cells, int(floor(from.x)), int(floor(from.y)), int(floor(from.z)));
if (result != 0xFFFFFFFF) {
break;
}
from += light_axis * distance_adv;
distance -= distance_adv;
}
if (result == (uint32_t)idx) {
//cell hit itself! hooray!
if (normal == Vector3()) {
for (int i = 0; i < 6; i++) {
light->accum[i][0] += light_energy.x * cells[idx].albedo[0] * att;
light->accum[i][1] += light_energy.y * cells[idx].albedo[1] * att;
light->accum[i][2] += light_energy.z * cells[idx].albedo[2] * att;
}
} else {
for (int i = 0; i < 6; i++) {
float s = MAX(0.0, aniso_normal[i].dot(-normal));
light->accum[i][0] += light_energy.x * cells[idx].albedo[0] * s * att;
light->accum[i][1] += light_energy.y * cells[idx].albedo[1] * s * att;
light->accum[i][2] += light_energy.z * cells[idx].albedo[2] * s * att;
}
}
if (p_direct) {
for (int i = 0; i < 6; i++) {
float s = MAX(0.0, aniso_normal[i].dot(-light_axis)); //light depending on normal for direct
light->direct_accum[i][0] += light_energy.x * s * att;
light->direct_accum[i][1] += light_energy.y * s * att;
light->direct_accum[i][2] += light_energy.z * s * att;
}
}
}
idx = light_data[idx].next_leaf;
}
}
void VoxelLightBaker::plot_light_spot(const Vector3 &p_pos, const Vector3 &p_axis, const Color &p_color, float p_energy, float p_indirect_energy, float p_radius, float p_attenutation, float p_spot_angle, float p_spot_attenuation, bool p_direct) {
_check_init_light();
if (p_direct) {
direct_lights_baked = true;
}
Plane clip[3];
int clip_planes = 0;
// uint64_t us = OS::get_singleton()->get_ticks_usec();
Vector3 light_pos = to_cell_space.xform(p_pos) + Vector3(0.5, 0.5, 0.5);
Vector3 spot_axis = to_cell_space.basis.xform(p_axis).normalized();
float local_radius = to_cell_space.basis.xform(Vector3(0, 0, 1)).length() * p_radius;
Light *light_data = bake_light.ptrw();
const Cell *cells = bake_cells.ptr();
Vector3 light_energy = Vector3(p_color.r, p_color.g, p_color.b) * p_energy * p_indirect_energy;
int idx = first_leaf;
while (idx >= 0) {
Light *light = &light_data[idx];
Vector3 to(light->x + 0.5, light->y + 0.5, light->z + 0.5);
Vector3 light_axis = (to - light_pos).normalized();
float distance_adv = _get_normal_advance(light_axis);
Vector3 normal(cells[idx].normal[0], cells[idx].normal[1], cells[idx].normal[2]);
if (normal != Vector3() && normal.dot(-light_axis) < 0.001) {
idx = light_data[idx].next_leaf;
continue;
}
float angle = Math::rad2deg(Math::acos(light_axis.dot(-spot_axis)));
if (angle > p_spot_angle) {
idx = light_data[idx].next_leaf;
continue; // too far away
}
float att = Math::pow(1.0f - angle / p_spot_angle, p_spot_attenuation);
{
float d = light_pos.distance_to(to);
if (d + distance_adv > local_radius) {
idx = light_data[idx].next_leaf;
continue; // too far away
}
float dt = CLAMP((d + distance_adv) / local_radius, 0, 1);
att *= powf(1.0 - dt, p_attenutation);
}
clip_planes = 0;
for (int c = 0; c < 3; c++) {
if (Math::is_zero_approx(light_axis[c])) {
continue;
}
clip[clip_planes].normal[c] = 1.0;
if (light_axis[c] < 0) {
clip[clip_planes].d = (1 << (cell_subdiv - 1)) + 1;
} else {
clip[clip_planes].d -= 1.0;
}
clip_planes++;
}
Vector3 from = light_pos;
for (int j = 0; j < clip_planes; j++) {
clip[j].intersects_segment(from, to, &from);
}
float distance = (to - from).length();
distance -= Math::fmod(distance, distance_adv); //make it reach the center of the box always, but this tame make it closer
from = to - light_axis * distance;
uint32_t result = 0xFFFFFFFF;
while (distance > -distance_adv) { //use this to avoid precision errors
result = _find_cell_at_pos(cells, int(floor(from.x)), int(floor(from.y)), int(floor(from.z)));
if (result != 0xFFFFFFFF) {
break;
}
from += light_axis * distance_adv;
distance -= distance_adv;
}
if (result == (uint32_t)idx) {
//cell hit itself! hooray!
if (normal == Vector3()) {
for (int i = 0; i < 6; i++) {
light->accum[i][0] += light_energy.x * cells[idx].albedo[0] * att;
light->accum[i][1] += light_energy.y * cells[idx].albedo[1] * att;
light->accum[i][2] += light_energy.z * cells[idx].albedo[2] * att;
}
} else {
for (int i = 0; i < 6; i++) {
float s = MAX(0.0, aniso_normal[i].dot(-normal));
light->accum[i][0] += light_energy.x * cells[idx].albedo[0] * s * att;
light->accum[i][1] += light_energy.y * cells[idx].albedo[1] * s * att;
light->accum[i][2] += light_energy.z * cells[idx].albedo[2] * s * att;
}
}
if (p_direct) {
for (int i = 0; i < 6; i++) {
float s = MAX(0.0, aniso_normal[i].dot(-light_axis)); //light depending on normal for direct
light->direct_accum[i][0] += light_energy.x * s * att;
light->direct_accum[i][1] += light_energy.y * s * att;
light->direct_accum[i][2] += light_energy.z * s * att;
}
}
}
idx = light_data[idx].next_leaf;
}
}
void VoxelLightBaker::_fixup_plot(int p_idx, int p_level) {
if (p_level == cell_subdiv - 1) {
leaf_voxel_count++;
float alpha = bake_cells[p_idx].alpha;
bake_cells.write[p_idx].albedo[0] /= alpha;
bake_cells.write[p_idx].albedo[1] /= alpha;
bake_cells.write[p_idx].albedo[2] /= alpha;
//transfer emission to light
bake_cells.write[p_idx].emission[0] /= alpha;
bake_cells.write[p_idx].emission[1] /= alpha;
bake_cells.write[p_idx].emission[2] /= alpha;
bake_cells.write[p_idx].normal[0] /= alpha;
bake_cells.write[p_idx].normal[1] /= alpha;
bake_cells.write[p_idx].normal[2] /= alpha;
Vector3 n(bake_cells[p_idx].normal[0], bake_cells[p_idx].normal[1], bake_cells[p_idx].normal[2]);
if (n.length() < 0.01) {
//too much fight over normal, zero it
bake_cells.write[p_idx].normal[0] = 0;
bake_cells.write[p_idx].normal[1] = 0;
bake_cells.write[p_idx].normal[2] = 0;
} else {
n.normalize();
bake_cells.write[p_idx].normal[0] = n.x;
bake_cells.write[p_idx].normal[1] = n.y;
bake_cells.write[p_idx].normal[2] = n.z;
}
bake_cells.write[p_idx].alpha = 1.0;
/*if (bake_light.size()) {
for(int i=0;i<6;i++) {
}
}*/
} else {
//go down
bake_cells.write[p_idx].emission[0] = 0;
bake_cells.write[p_idx].emission[1] = 0;
bake_cells.write[p_idx].emission[2] = 0;
bake_cells.write[p_idx].normal[0] = 0;
bake_cells.write[p_idx].normal[1] = 0;
bake_cells.write[p_idx].normal[2] = 0;
bake_cells.write[p_idx].albedo[0] = 0;
bake_cells.write[p_idx].albedo[1] = 0;
bake_cells.write[p_idx].albedo[2] = 0;
if (bake_light.size()) {
for (int j = 0; j < 6; j++) {
bake_light.write[p_idx].accum[j][0] = 0;
bake_light.write[p_idx].accum[j][1] = 0;
bake_light.write[p_idx].accum[j][2] = 0;
}
}
float alpha_average = 0;
int children_found = 0;
for (int i = 0; i < 8; i++) {
uint32_t child = bake_cells[p_idx].children[i];
if (child == CHILD_EMPTY) {
continue;
}
_fixup_plot(child, p_level + 1);
alpha_average += bake_cells[child].alpha;
if (bake_light.size() > 0) {
for (int j = 0; j < 6; j++) {
bake_light.write[p_idx].accum[j][0] += bake_light[child].accum[j][0];
bake_light.write[p_idx].accum[j][1] += bake_light[child].accum[j][1];
bake_light.write[p_idx].accum[j][2] += bake_light[child].accum[j][2];
}
bake_cells.write[p_idx].emission[0] += bake_cells[child].emission[0];
bake_cells.write[p_idx].emission[1] += bake_cells[child].emission[1];
bake_cells.write[p_idx].emission[2] += bake_cells[child].emission[2];
}
children_found++;
}
bake_cells.write[p_idx].alpha = alpha_average / 8.0;
if (bake_light.size() && children_found) {
float divisor = Math::lerp(8, children_found, propagation);
for (int j = 0; j < 6; j++) {
bake_light.write[p_idx].accum[j][0] /= divisor;
bake_light.write[p_idx].accum[j][1] /= divisor;
bake_light.write[p_idx].accum[j][2] /= divisor;
}
bake_cells.write[p_idx].emission[0] /= divisor;
bake_cells.write[p_idx].emission[1] /= divisor;
bake_cells.write[p_idx].emission[2] /= divisor;
}
}
}
void VoxelLightBaker::begin_bake(int p_subdiv, const AABB &p_bounds) {
original_bounds = p_bounds;
cell_subdiv = p_subdiv;
bake_cells.resize(1);
material_cache.clear();
//find out the actual real bounds, power of 2, which gets the highest subdivision
po2_bounds = p_bounds;
int longest_axis = po2_bounds.get_longest_axis_index();
axis_cell_size[longest_axis] = (1 << (cell_subdiv - 1));
leaf_voxel_count = 0;
for (int i = 0; i < 3; i++) {
if (i == longest_axis) {
continue;
}
axis_cell_size[i] = axis_cell_size[longest_axis];
float axis_size = po2_bounds.size[longest_axis];
//shrink until fit subdiv
while (axis_size / 2.0 >= po2_bounds.size[i]) {
axis_size /= 2.0;
axis_cell_size[i] >>= 1;
}
po2_bounds.size[i] = po2_bounds.size[longest_axis];
}
Transform to_bounds;
to_bounds.basis.scale(Vector3(po2_bounds.size[longest_axis], po2_bounds.size[longest_axis], po2_bounds.size[longest_axis]));
to_bounds.origin = po2_bounds.position;
Transform to_grid;
to_grid.basis.scale(Vector3(axis_cell_size[longest_axis], axis_cell_size[longest_axis], axis_cell_size[longest_axis]));
to_cell_space = to_grid * to_bounds.affine_inverse();
cell_size = po2_bounds.size[longest_axis] / axis_cell_size[longest_axis];
}
void VoxelLightBaker::end_bake() {
_fixup_plot(0, 0);
}
//create the data for visual server
PoolVector<int> VoxelLightBaker::create_gi_probe_data() {
PoolVector<int> data;
data.resize(16 + (8 + 1 + 1 + 1 + 1) * bake_cells.size()); //4 for header, rest for rest.
{
PoolVector<int>::Write w = data.write();
uint32_t *w32 = (uint32_t *)w.ptr();
w32[0] = 0; //version
w32[1] = cell_subdiv; //subdiv
w32[2] = axis_cell_size[0];
w32[3] = axis_cell_size[1];
w32[4] = axis_cell_size[2];
w32[5] = bake_cells.size();
w32[6] = leaf_voxel_count;
int ofs = 16;
for (int i = 0; i < bake_cells.size(); i++) {
for (int j = 0; j < 8; j++) {
w32[ofs++] = bake_cells[i].children[j];
}
{ //albedo
uint32_t rgba = uint32_t(CLAMP(bake_cells[i].albedo[0] * 255.0, 0, 255)) << 16;
rgba |= uint32_t(CLAMP(bake_cells[i].albedo[1] * 255.0, 0, 255)) << 8;
rgba |= uint32_t(CLAMP(bake_cells[i].albedo[2] * 255.0, 0, 255)) << 0;
w32[ofs++] = rgba;
}
{ //emission
Vector3 e(bake_cells[i].emission[0], bake_cells[i].emission[1], bake_cells[i].emission[2]);
float l = e.length();
if (l > 0) {
e.normalize();
l = CLAMP(l / 8.0, 0, 1.0);
}
uint32_t em = uint32_t(CLAMP(e[0] * 255, 0, 255)) << 24;
em |= uint32_t(CLAMP(e[1] * 255, 0, 255)) << 16;
em |= uint32_t(CLAMP(e[2] * 255, 0, 255)) << 8;
em |= uint32_t(CLAMP(l * 255, 0, 255));
w32[ofs++] = em;
}
//w32[ofs++]=bake_cells[i].used_sides;
{ //normal
Vector3 n(bake_cells[i].normal[0], bake_cells[i].normal[1], bake_cells[i].normal[2]);
n = n * Vector3(0.5, 0.5, 0.5) + Vector3(0.5, 0.5, 0.5);
uint32_t norm = 0;
norm |= uint32_t(CLAMP(n.x * 255.0, 0, 255)) << 16;
norm |= uint32_t(CLAMP(n.y * 255.0, 0, 255)) << 8;
norm |= uint32_t(CLAMP(n.z * 255.0, 0, 255)) << 0;
w32[ofs++] = norm;
}
{
uint16_t alpha = MIN(uint32_t(bake_cells[i].alpha * 65535.0), 65535);
uint16_t level = bake_cells[i].level;
w32[ofs++] = (uint32_t(level) << 16) | uint32_t(alpha);
}
}
}
return data;
}
void VoxelLightBaker::_debug_mesh(int p_idx, int p_level, const AABB &p_aabb, Ref<MultiMesh> &p_multimesh, int &idx, DebugMode p_mode) {
if (p_level == cell_subdiv - 1) {
Vector3 center = p_aabb.position + p_aabb.size * 0.5;
Transform xform;
xform.origin = center;
xform.basis.scale(p_aabb.size * 0.5);
p_multimesh->set_instance_transform(idx, xform);
Color col;
if (p_mode == DEBUG_ALBEDO) {
col = Color(bake_cells[p_idx].albedo[0], bake_cells[p_idx].albedo[1], bake_cells[p_idx].albedo[2]);
} else if (p_mode == DEBUG_LIGHT) {
for (int i = 0; i < 6; i++) {
col.r += bake_light[p_idx].accum[i][0];
col.g += bake_light[p_idx].accum[i][1];
col.b += bake_light[p_idx].accum[i][2];
col.r += bake_light[p_idx].direct_accum[i][0];
col.g += bake_light[p_idx].direct_accum[i][1];
col.b += bake_light[p_idx].direct_accum[i][2];
}
}
//Color col = Color(bake_cells[p_idx].emission[0], bake_cells[p_idx].emission[1], bake_cells[p_idx].emission[2]);
p_multimesh->set_instance_color(idx, col);
idx++;
} else {
for (int i = 0; i < 8; i++) {
uint32_t child = bake_cells[p_idx].children[i];
if (child == CHILD_EMPTY || child >= (uint32_t)max_original_cells) {
continue;
}
AABB aabb = p_aabb;
aabb.size *= 0.5;
if (i & 1) {
aabb.position.x += aabb.size.x;
}
if (i & 2) {
aabb.position.y += aabb.size.y;
}
if (i & 4) {
aabb.position.z += aabb.size.z;
}
_debug_mesh(bake_cells[p_idx].children[i], p_level + 1, aabb, p_multimesh, idx, p_mode);
}
}
}
Ref<MultiMesh> VoxelLightBaker::create_debug_multimesh(DebugMode p_mode) {
Ref<MultiMesh> mm;
ERR_FAIL_COND_V(p_mode == DEBUG_LIGHT && bake_light.size() == 0, mm);
mm.instance();
mm->set_transform_format(MultiMesh::TRANSFORM_3D);
mm->set_color_format(MultiMesh::COLOR_8BIT);
mm->set_instance_count(leaf_voxel_count);
Ref<ArrayMesh> mesh;
mesh.instance();
{
Array arr;
arr.resize(Mesh::ARRAY_MAX);
PoolVector<Vector3> vertices;
PoolVector<Color> colors;
#define ADD_VTX(m_idx) \
; \
vertices.push_back(face_points[m_idx]); \
colors.push_back(Color(1, 1, 1, 1));
for (int i = 0; i < 6; i++) {
Vector3 face_points[4];
for (int j = 0; j < 4; j++) {
float v[3];
v[0] = 1.0;
v[1] = 1 - 2 * ((j >> 1) & 1);
v[2] = v[1] * (1 - 2 * (j & 1));
for (int k = 0; k < 3; k++) {
if (i < 3) {
face_points[j][(i + k) % 3] = v[k];
} else {
face_points[3 - j][(i + k) % 3] = -v[k];
}
}
}
//tri 1
ADD_VTX(0);
ADD_VTX(1);
ADD_VTX(2);
//tri 2
ADD_VTX(2);
ADD_VTX(3);
ADD_VTX(0);
}
arr[Mesh::ARRAY_VERTEX] = vertices;
arr[Mesh::ARRAY_COLOR] = colors;
mesh->add_surface_from_arrays(Mesh::PRIMITIVE_TRIANGLES, arr);
}
{
Ref<SpatialMaterial> fsm;
fsm.instance();
fsm->set_flag(SpatialMaterial::FLAG_SRGB_VERTEX_COLOR, true);
fsm->set_flag(SpatialMaterial::FLAG_ALBEDO_FROM_VERTEX_COLOR, true);
fsm->set_flag(SpatialMaterial::FLAG_UNSHADED, true);
fsm->set_albedo(Color(1, 1, 1, 1));
mesh->surface_set_material(0, fsm);
}
mm->set_mesh(mesh);
int idx = 0;
_debug_mesh(0, 0, po2_bounds, mm, idx, p_mode);
return mm;
}
struct VoxelLightBakerOctree {
enum {
CHILD_EMPTY = 0xFFFFFFFF
};
uint16_t light[6][3]; //anisotropic light
float alpha;
uint32_t children[8];
};
PoolVector<uint8_t> VoxelLightBaker::create_capture_octree(int p_subdiv) {
p_subdiv = MIN(p_subdiv, cell_subdiv); // use the smaller one
Vector<uint32_t> remap;
int bc = bake_cells.size();
remap.resize(bc);
Vector<uint32_t> demap;
int new_size = 0;
for (int i = 0; i < bc; i++) {
uint32_t c = CHILD_EMPTY;
if (bake_cells[i].level < p_subdiv) {
c = new_size;
new_size++;
demap.push_back(i);
}
remap.write[i] = c;
}
Vector<VoxelLightBakerOctree> octree;
octree.resize(new_size);
for (int i = 0; i < new_size; i++) {
octree.write[i].alpha = bake_cells[demap[i]].alpha;
for (int j = 0; j < 6; j++) {
for (int k = 0; k < 3; k++) {
float l = bake_light[demap[i]].accum[j][k]; //add anisotropic light
l += bake_cells[demap[i]].emission[k]; //add emission
octree.write[i].light[j][k] = CLAMP(l * 1024, 0, 65535); //give two more bits to octree
}
}
for (int j = 0; j < 8; j++) {
uint32_t child = bake_cells[demap[i]].children[j];
octree.write[i].children[j] = child == CHILD_EMPTY ? CHILD_EMPTY : remap[child];
}
}
PoolVector<uint8_t> ret;
int ret_bytes = octree.size() * sizeof(VoxelLightBakerOctree);
ret.resize(ret_bytes);
{
PoolVector<uint8_t>::Write w = ret.write();
memcpy(w.ptr(), octree.ptr(), ret_bytes);
}
return ret;
}
float VoxelLightBaker::get_cell_size() const {
return cell_size;
}
Transform VoxelLightBaker::get_to_cell_space_xform() const {
return to_cell_space;
}
VoxelLightBaker::VoxelLightBaker() {
color_scan_cell_width = 4;
bake_texture_size = 128;
propagation = 0.85;
}
Reference in a new issue View git blame Copy permalink