Nixyri/godot
1
0
Fork 0
mirror of https://github.com/godotengine/godot.git synced 2024-11-22 12:12:28 +00:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

convert old octahedral compressed normals/tangents

Browse Source
This commit is contained in:
nikitalita 2022-01-08 04:03:57 -08:00
parent 9f058674ac
commit 92a0cbccd5
1 changed files with 134 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

180
scene/resources/mesh.cpp
View File

@ -596,7 +596,7 @@ enum OldArrayFormat {
OLD_ARRAY_FLAG_USE_2D_VERTICES = OLD_ARRAY_COMPRESS_INDEX << 1,
OLD_ARRAY_FLAG_USE_16_BIT_BONES = OLD_ARRAY_COMPRESS_INDEX << 2,
OLD_ARRAY_FLAG_USE_DYNAMIC_UPDATE = OLD_ARRAY_COMPRESS_INDEX << 3,
OLD_ARRAY_FLAG_USE_OCTAHEDRAL_COMPRESSION = OLD_ARRAY_COMPRESS_INDEX << 4,
};
#ifndef DISABLE_DEPRECATED
@ -626,6 +626,27 @@ static Mesh::PrimitiveType _old_primitives[7] = {
};
#endif // DISABLE_DEPRECATED
// Convert Octahedron-mapped normalized vector back to Cartesian
// Assumes normalized format (elements of v within range [-1, 1])
Vector3 _oct_to_norm(const Vector2 v) {
Vector3 res(v.x, v.y, 1 - (Math::absf(v.x) + Math::absf(v.y)));
float t = MAX(-res.z, 0.0f);
res.x += t * -SIGN(res.x);
res.y += t * -SIGN(res.y);
return res.normalized();
}
// Convert Octahedron-mapped normalized tangent vector back to Cartesian
// out_sign provides the direction for the original cartesian tangent
// Assumes normalized format (elements of v within range [-1, 1])
Vector3 _oct_to_tangent(const Vector2 v, float *out_sign) {
Vector2 v_decompressed = v;
v_decompressed.y = Math::absf(v_decompressed.y) * 2 - 1;
Vector3 res = _oct_to_norm(v_decompressed);
*out_sign = SIGN(v[1]);
return res;
}
void _fix_array_compatibility(const Vector<uint8_t> &p_src, uint32_t p_old_format, uint32_t p_new_format, uint32_t p_elements, Vector<uint8_t> &vertex_data, Vector<uint8_t> &attribute_data, Vector<uint8_t> &skin_data) {
uint32_t dst_vertex_stride;
uint32_t dst_attribute_stride;
@ -692,66 +713,133 @@ void _fix_array_compatibility(const Vector<uint8_t> &p_src, uint32_t p_old_forma
}
} break;
case OLD_ARRAY_NORMAL: {
if (p_old_format & OLD_ARRAY_COMPRESS_NORMAL) {
const float multiplier = 1.f / 127.f * 1023.0f;
if (p_old_format & OLD_ARRAY_FLAG_USE_OCTAHEDRAL_COMPRESSION) {
if ((p_old_format & OLD_ARRAY_COMPRESS_NORMAL) && (p_old_format & OLD_ARRAY_FORMAT_TANGENT) && (p_old_format & OLD_ARRAY_COMPRESS_TANGENT)) {
for (uint32_t i = 0; i < p_elements; i++) {
const int8_t *src = (const int8_t *)&src_vertex_ptr[i * src_vertex_stride + src_offset];
uint32_t *dst = (uint32_t *)&dst_vertex_ptr[i * dst_vertex_stride + dst_offsets[Mesh::ARRAY_NORMAL]];
const Vector2 src_vec(src[0] / 127.0f, src[1] / 127.0f);
for (uint32_t i = 0; i < p_elements; i++) {
const int8_t *src = (const int8_t *)&src_vertex_ptr[i * src_vertex_stride + src_offset];
uint32_t *dst = (uint32_t *)&dst_vertex_ptr[i * dst_vertex_stride + dst_offsets[Mesh::ARRAY_NORMAL]];
const Vector3 res = _oct_to_norm(src_vec) * Vector3(0.5, 0.5, 0.5) + Vector3(0.5, 0.5, 0.5);
*dst = 0;
*dst |= CLAMP(int(res.x * 1023.0f), 0, 1023);
*dst |= CLAMP(int(res.y * 1023.0f), 0, 1023) << 10;
*dst |= CLAMP(int(res.z * 1023.0f), 0, 1023) << 20;
}
src_offset += sizeof(int8_t) * 2;
} else {
for (uint32_t i = 0; i < p_elements; i++) {
const int16_t *src = (const int16_t *)&src_vertex_ptr[i * src_vertex_stride + src_offset];
uint32_t *dst = (uint32_t *)&dst_vertex_ptr[i * dst_vertex_stride + dst_offsets[Mesh::ARRAY_NORMAL]];
const Vector2 src_vec(src[0] / 32767.0f, src[1] / 32767.0f);
*dst = 0;
*dst |= CLAMP(int(src[0] * multiplier), 0, 1023);
*dst |= CLAMP(int(src[1] * multiplier), 0, 1023) << 10;
*dst |= CLAMP(int(src[2] * multiplier), 0, 1023) << 20;
const Vector3 res = _oct_to_norm(src_vec) * Vector3(0.5, 0.5, 0.5) + Vector3(0.5, 0.5, 0.5);
*dst = 0;
*dst |= CLAMP(int(res.x * 1023.0f), 0, 1023);
*dst |= CLAMP(int(res.y * 1023.0f), 0, 1023) << 10;
*dst |= CLAMP(int(res.z * 1023.0f), 0, 1023) << 20;
}
src_offset += sizeof(int16_t) * 2;
}
src_offset += sizeof(uint32_t);
} else {
for (uint32_t i = 0; i < p_elements; i++) {
const float *src = (const float *)&src_vertex_ptr[i * src_vertex_stride + src_offset];
uint32_t *dst = (uint32_t *)&dst_vertex_ptr[i * dst_vertex_stride + dst_offsets[Mesh::ARRAY_NORMAL]];
} else { // No Octahedral compression
if (p_old_format & OLD_ARRAY_COMPRESS_NORMAL) {
const float multiplier = 1.f / 127.f * 1023.0f;
*dst = 0;
*dst |= CLAMP(int(src[0] * 1023.0), 0, 1023);
*dst |= CLAMP(int(src[1] * 1023.0), 0, 1023) << 10;
*dst |= CLAMP(int(src[2] * 1023.0), 0, 1023) << 20;
for (uint32_t i = 0; i < p_elements; i++) {
const int8_t *src = (const int8_t *)&src_vertex_ptr[i * src_vertex_stride + src_offset];
uint32_t *dst = (uint32_t *)&dst_vertex_ptr[i * dst_vertex_stride + dst_offsets[Mesh::ARRAY_NORMAL]];
*dst = 0;
*dst |= CLAMP(int(src[0] * multiplier), 0, 1023);
*dst |= CLAMP(int(src[1] * multiplier), 0, 1023) << 10;
*dst |= CLAMP(int(src[2] * multiplier), 0, 1023) << 20;
}
src_offset += sizeof(uint32_t);
} else {
for (uint32_t i = 0; i < p_elements; i++) {
const float *src = (const float *)&src_vertex_ptr[i * src_vertex_stride + src_offset];
uint32_t *dst = (uint32_t *)&dst_vertex_ptr[i * dst_vertex_stride + dst_offsets[Mesh::ARRAY_NORMAL]];
*dst = 0;
*dst |= CLAMP(int(src[0] * 1023.0), 0, 1023);
*dst |= CLAMP(int(src[1] * 1023.0), 0, 1023) << 10;
*dst |= CLAMP(int(src[2] * 1023.0), 0, 1023) << 20;
}
src_offset += sizeof(float) * 3;
}
src_offset += sizeof(float) * 3;
}
} break;
case OLD_ARRAY_TANGENT: {
if (p_old_format & OLD_ARRAY_COMPRESS_TANGENT) {
const float multiplier = 1.f / 127.f * 1023.0f;
if (p_old_format & OLD_ARRAY_FLAG_USE_OCTAHEDRAL_COMPRESSION) {
if (p_old_format & OLD_ARRAY_COMPRESS_TANGENT) { // int8
for (uint32_t i = 0; i < p_elements; i++) {
const int8_t *src = (const int8_t *)&src_vertex_ptr[i * src_vertex_stride + src_offset];
uint32_t *dst = (uint32_t *)&dst_vertex_ptr[i * dst_vertex_stride + dst_offsets[Mesh::ARRAY_TANGENT]];
const Vector2 src_vec(src[0] / 127.0f, src[1] / 127.0f);
float out_sign;
const Vector3 res = _oct_to_tangent(src_vec, &out_sign) * Vector3(0.5, 0.5, 0.5) + Vector3(0.5, 0.5, 0.5);
for (uint32_t i = 0; i < p_elements; i++) {
const int8_t *src = (const int8_t *)&src_vertex_ptr[i * src_vertex_stride + src_offset];
uint32_t *dst = (uint32_t *)&dst_vertex_ptr[i * dst_vertex_stride + dst_offsets[Mesh::ARRAY_TANGENT]];
*dst = 0;
*dst |= CLAMP(int(src[0] * multiplier), 0, 1023);
*dst |= CLAMP(int(src[1] * multiplier), 0, 1023) << 10;
*dst |= CLAMP(int(src[2] * multiplier), 0, 1023) << 20;
if (src[3] > 0) {
*dst |= 3 << 30;
*dst = 0;
*dst |= CLAMP(int(res.x * 1023.0), 0, 1023);
*dst |= CLAMP(int(res.y * 1023.0), 0, 1023) << 10;
*dst |= CLAMP(int(res.z * 1023.0), 0, 1023) << 20;
if (out_sign > 0) {
*dst |= 3 << 30;
}
}
}
src_offset += sizeof(uint32_t);
} else {
for (uint32_t i = 0; i < p_elements; i++) {
const float *src = (const float *)&src_vertex_ptr[i * src_vertex_stride + src_offset];
uint32_t *dst = (uint32_t *)&dst_vertex_ptr[i * dst_vertex_stride + dst_offsets[Mesh::ARRAY_TANGENT]];
src_offset += sizeof(int8_t) * 2;
} else { // int16
for (uint32_t i = 0; i < p_elements; i++) {
const int16_t *src = (const int16_t *)&src_vertex_ptr[i * src_vertex_stride + src_offset];
uint32_t *dst = (uint32_t *)&dst_vertex_ptr[i * dst_vertex_stride + dst_offsets[Mesh::ARRAY_TANGENT]];
const Vector2 src_vec(src[0] / 32767.0f, src[1] / 32767.0f);
float out_sign;
Vector3 res = _oct_to_tangent(src_vec, &out_sign) * Vector3(0.5, 0.5, 0.5) + Vector3(0.5, 0.5, 0.5);
*dst = 0;
*dst |= CLAMP(int(src[0] * 1023.0), 0, 1023);
*dst |= CLAMP(int(src[1] * 1023.0), 0, 1023) << 10;
*dst |= CLAMP(int(src[2] * 1023.0), 0, 1023) << 20;
if (src[3] > 0) {
*dst |= 3 << 30;
*dst = 0;
*dst |= CLAMP(int(res.x * 1023.0), 0, 1023);
*dst |= CLAMP(int(res.y * 1023.0), 0, 1023) << 10;
*dst |= CLAMP(int(res.z * 1023.0), 0, 1023) << 20;
if (out_sign > 0) {
*dst |= 3 << 30;
}
}
src_offset += sizeof(int16_t) * 2;
}
} else { // No Octahedral compression
if (p_old_format & OLD_ARRAY_COMPRESS_TANGENT) {
const float multiplier = 1.f / 127.f * 1023.0f;
for (uint32_t i = 0; i < p_elements; i++) {
const int8_t *src = (const int8_t *)&src_vertex_ptr[i * src_vertex_stride + src_offset];
uint32_t *dst = (uint32_t *)&dst_vertex_ptr[i * dst_vertex_stride + dst_offsets[Mesh::ARRAY_TANGENT]];
*dst = 0;
*dst |= CLAMP(int(src[0] * multiplier), 0, 1023);
*dst |= CLAMP(int(src[1] * multiplier), 0, 1023) << 10;
*dst |= CLAMP(int(src[2] * multiplier), 0, 1023) << 20;
if (src[3] > 0) {
*dst |= 3 << 30;
}
}
src_offset += sizeof(uint32_t);
} else {
for (uint32_t i = 0; i < p_elements; i++) {
const float *src = (const float *)&src_vertex_ptr[i * src_vertex_stride + src_offset];
uint32_t *dst = (uint32_t *)&dst_vertex_ptr[i * dst_vertex_stride + dst_offsets[Mesh::ARRAY_TANGENT]];
*dst = 0;
*dst |= CLAMP(int(src[0] * 1023.0), 0, 1023);
*dst |= CLAMP(int(src[1] * 1023.0), 0, 1023) << 10;
*dst |= CLAMP(int(src[2] * 1023.0), 0, 1023) << 20;
if (src[3] > 0) {
*dst |= 3 << 30;
}
}
src_offset += sizeof(float) * 4;
}
src_offset += sizeof(float) * 4;
}
} break;
case OLD_ARRAY_COLOR: {
if (p_old_format & OLD_ARRAY_COMPRESS_COLOR) {