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2025-02-18 15:21:31 +08:00
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125
cocos/3d/misc/Buffer.cpp Normal file
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/****************************************************************************
Copyright (c) 2021-2023 Xiamen Yaji Software Co., Ltd.
http://www.cocos.com
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 "3d/misc/Buffer.h"
#include "base/std/variant.h"
namespace cc {
namespace {
ccstd::unordered_map<gfx::FormatType, ccstd::string> typeMap{
{gfx::FormatType::UNORM, "Uint"},
{gfx::FormatType::SNORM, "Int"},
{gfx::FormatType::UINT, "Uint"},
{gfx::FormatType::INT, "Int"},
{gfx::FormatType::UFLOAT, "Float"},
{gfx::FormatType::FLOAT, "Float"},
};
ccstd::string getDataViewType(const gfx::FormatInfo &info) {
ccstd::string type;
auto iter = typeMap.find(info.type);
if (iter != typeMap.end()) {
type = iter->second;
} else {
type = "Uint";
}
const uint32_t bytes = info.size / info.count * 8;
return type + std::to_string(bytes);
}
} // namespace
using DataVariant = ccstd::variant<ccstd::monostate, int32_t, float>;
using MapBufferCallback = std::function<DataVariant(const DataVariant &cur, uint32_t idx, const DataView &view)>;
DataView mapBuffer(DataView &target,
const MapBufferCallback &callback,
ccstd::optional<gfx::Format> aFormat,
ccstd::optional<uint32_t> aOffset,
ccstd::optional<uint32_t> aLength,
ccstd::optional<uint32_t> aStride,
DataView *out) {
gfx::Format format = aFormat.has_value() ? aFormat.value() : gfx::Format::R32F;
uint32_t offset = aOffset.has_value() ? aOffset.value() : 0;
uint32_t length = aLength.has_value() ? aLength.value() : target.byteLength() - offset;
uint32_t stride = aStride.has_value() ? aStride.value() : 0;
DataView dataView;
if (out == nullptr) {
out = &dataView;
dataView.assign(target.buffer()->slice(target.byteOffset(), target.byteOffset() + target.byteLength()));
}
const auto &info = gfx::GFX_FORMAT_INFOS[static_cast<int32_t>(format)];
if (stride == 0) {
stride = info.size;
}
static const ccstd::string SET_PREFIX{"set"};
static const ccstd::string GET_PREFIX{"get"};
bool isFloat = info.type == gfx::FormatType::FLOAT || info.type == gfx::FormatType::UFLOAT;
DataView::IntWritter intWritter = nullptr;
if (!isFloat) {
intWritter = DataView::intWritterMap[SET_PREFIX + getDataViewType(info)];
}
DataView::ReaderVariant intReader;
if (!isFloat) {
intReader = DataView::intReaderMap[GET_PREFIX + getDataViewType(info)];
}
const uint32_t componentBytesLength = info.size / info.count;
const uint32_t nSeg = floor(length / stride);
for (uint32_t iSeg = 0; iSeg < nSeg; ++iSeg) {
const uint32_t x = offset + stride * iSeg;
for (uint32_t iComponent = 0; iComponent < info.count; ++iComponent) {
const uint32_t y = x + componentBytesLength * iComponent;
if (isFloat) {
float cur = target.getFloat32(y);
auto dataVariant = callback(cur, iComponent, target);
if (ccstd::holds_alternative<float>(dataVariant)) {
out->setFloat32(y, ccstd::get<float>(dataVariant));
} else {
CC_LOG_ERROR("mapBuffer, wrong data type, expect float");
}
} else {
int32_t cur = target.readInt(intReader, y);
// iComponent is usually more useful than y
auto dataVariant = callback(cur, iComponent, target);
if (ccstd::holds_alternative<int32_t>(dataVariant)) {
(target.*intWritter)(y, ccstd::get<int32_t>(dataVariant));
} else {
CC_LOG_ERROR("mapBuffer, wrong data type, expect int32_t");
}
}
}
}
return dataView;
}
} // namespace cc

125
cocos/3d/misc/Buffer.h Normal file
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/****************************************************************************
Copyright (c) 2021-2023 Xiamen Yaji Software Co., Ltd.
http://www.cocos.com
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.
****************************************************************************/
#pragma once
#include <cmath>
#include "base/std/optional.h"
#include "core/DataView.h"
#include "renderer/gfx-base/GFXDef.h"
namespace cc {
// default params behaviors just like on an plain, compact Float32Array
template <typename T>
void writeBuffer(DataView &target,
const ccstd::vector<T> &data,
const gfx::Format &format = gfx::Format::R32F,
uint32_t offset = 0,
uint32_t stride = 0) {
const gfx::FormatInfo &info = gfx::GFX_FORMAT_INFOS[static_cast<uint32_t>(format)];
if (stride == 0) {
stride = info.size;
}
const uint32_t componentBytesLength = info.size / info.count;
const auto nSeg = static_cast<uint32_t>(floor(data.size() / info.count));
const uint32_t bytes = info.size / info.count * 8;
for (uint32_t iSeg = 0; iSeg < nSeg; ++iSeg) {
uint32_t x = offset + stride * iSeg;
for (uint32_t iComponent = 0; iComponent < info.count; ++iComponent) {
const uint32_t y = x + componentBytesLength * iComponent;
// default Little-Endian
switch (info.type) {
case gfx::FormatType::UINT:
case gfx::FormatType::UNORM:
switch (bytes) {
case 8:
target.setUint8(y, static_cast<uint8_t>(data[info.count * iSeg + iComponent]));
break;
case 16:
target.setUint16(y, static_cast<uint16_t>(data[info.count * iSeg + iComponent]));
break;
case 32:
target.setUint32(y, static_cast<uint32_t>(data[info.count * iSeg + iComponent]));
break;
default:
CC_ABORT();
break;
}
break;
case gfx::FormatType::INT:
case gfx::FormatType::SNORM:
switch (bytes) {
case 8:
target.setInt8(y, static_cast<int8_t>(data[info.count * iSeg + iComponent]));
break;
case 16:
target.setInt16(y, static_cast<int16_t>(data[info.count * iSeg + iComponent]));
break;
case 32:
target.setInt32(y, static_cast<int32_t>(data[info.count * iSeg + iComponent]));
break;
default:
CC_ABORT();
break;
}
break;
case gfx::FormatType::UFLOAT:
case gfx::FormatType::FLOAT:
switch (bytes) {
case 8:
target.setFloat32(y, static_cast<float>(data[info.count * iSeg + iComponent]));
break;
case 16:
target.setFloat32(y, static_cast<float>(data[info.count * iSeg + iComponent]));
break;
case 32:
target.setFloat32(y, static_cast<float>(data[info.count * iSeg + iComponent]));
break;
default:
CC_ABORT();
break;
}
break;
default:
CC_ABORT();
break;
}
}
}
}
using DataVariant = ccstd::variant<ccstd::monostate, int32_t, float>;
using MapBufferCallback = std::function<DataVariant(const DataVariant &cur, uint32_t idx, const DataView &view)>;
DataView mapBuffer(DataView &target,
const MapBufferCallback &callback,
ccstd::optional<gfx::Format> aFormat,
ccstd::optional<uint32_t> aOffset,
ccstd::optional<uint32_t> aLength,
ccstd::optional<uint32_t> aStride,
DataView *out);
} // namespace cc

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cocos/3d/misc/BufferBlob.cpp Normal file
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/****************************************************************************
Copyright (c) 2021-2023 Xiamen Yaji Software Co., Ltd.
http://www.cocos.com
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 "3d/misc/BufferBlob.h"
#include "core/TypedArray.h"
namespace cc {
void BufferBlob::setNextAlignment(uint32_t align) {
if (align != 0) {
const uint32_t remainder = _length % align;
if (remainder != 0) {
const uint32_t padding = align - remainder;
_arrayBufferOrPaddings.emplace_back(padding);
_length += padding;
}
}
}
uint32_t BufferBlob::addBuffer(ArrayBuffer *arrayBuffer) {
const uint32_t result = _length;
_arrayBufferOrPaddings.emplace_back(arrayBuffer);
_length += arrayBuffer->byteLength();
return result;
}
ArrayBuffer::Ptr BufferBlob::getCombined() {
Int8Array result(_length);
uint32_t counter = 0;
for (const auto &arrayBufferOrPadding : _arrayBufferOrPaddings) {
if (const auto *p = ccstd::get_if<uint32_t>(&arrayBufferOrPadding)) {
counter += *p;
} else if (const auto *p = ccstd::get_if<ArrayBuffer::Ptr>(&arrayBufferOrPadding)) {
result.set(*p, counter);
counter += (*p)->byteLength();
}
}
return result.buffer();
}
} // namespace cc

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cocos/3d/misc/BufferBlob.h Normal file
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/****************************************************************************
Copyright (c) 2021-2023 Xiamen Yaji Software Co., Ltd.
http://www.cocos.com
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.
****************************************************************************/
#pragma once
#include "base/std/variant.h"
#include "cocos/base/std/container/vector.h"
#include "core/ArrayBuffer.h"
namespace cc {
class BufferBlob {
public:
void setNextAlignment(uint32_t align);
uint32_t addBuffer(ArrayBuffer *arrayBuffer);
inline uint32_t getLength() const { return _length; }
ArrayBuffer::Ptr getCombined();
private:
ccstd::vector<ccstd::variant<ccstd::monostate, ArrayBuffer::Ptr, uint32_t>> _arrayBufferOrPaddings;
uint32_t _length{0};
};
} // namespace cc

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cocos/3d/misc/CreateMesh.cpp Normal file
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/****************************************************************************
Copyright (c) 2022-2023 Xiamen Yaji Software Co., Ltd.
https://www.cocos.com/
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 "3d/misc/CreateMesh.h"
#include <zlib.h>
#include <algorithm>
#include "3d/misc/Buffer.h"
#include "3d/misc/BufferBlob.h"
#include "core/ArrayBuffer.h"
#include "core/DataView.h"
#include "core/assets/RenderingSubMesh.h"
#include "meshopt/meshoptimizer.h"
#include "renderer/gfx-base/GFXDef-common.h"
namespace cc {
namespace {
gfx::AttributeList defAttrs = {
gfx::Attribute{gfx::ATTR_NAME_POSITION, gfx::Format::RGB32F},
gfx::Attribute{gfx::ATTR_NAME_NORMAL, gfx::Format::RGB32F},
gfx::Attribute{gfx::ATTR_NAME_TEX_COORD, gfx::Format::RG32F},
gfx::Attribute{gfx::ATTR_NAME_TANGENT, gfx::Format::RGBA32F},
gfx::Attribute{gfx::ATTR_NAME_COLOR, gfx::Format::RGBA32F},
};
} // namespace
Mesh *MeshUtils::createMesh(const IGeometry &geometry, Mesh *out /*= nullptr*/, const ICreateMeshOptions &options /*= {}*/) {
if (!out) {
out = ccnew Mesh();
}
out->reset(createMeshInfo(geometry, options));
return out;
}
Mesh::ICreateInfo MeshUtils::createMeshInfo(const IGeometry &geometry, const ICreateMeshOptions &options /* = {}*/) {
// Collect attributes and calculate length of result vertex buffer.
gfx::AttributeList attributes;
uint32_t stride = 0;
struct Channel {
uint32_t offset{0};
ccstd::vector<float> data; // float?
gfx::Attribute attribute;
};
ccstd::vector<Channel> channels;
uint32_t vertCount = 0;
const gfx::Attribute *attr = nullptr;
ccstd::vector<float> positions(geometry.positions);
if (!positions.empty()) {
attr = nullptr;
if (geometry.attributes.has_value()) {
for (const auto &att : geometry.attributes.value()) {
if (att.name == gfx::ATTR_NAME_POSITION) {
attr = &att;
break;
}
}
}
if (attr == nullptr) {
attr = &defAttrs[0];
}
attributes.emplace_back(*attr);
const auto &info = gfx::GFX_FORMAT_INFOS[static_cast<uint32_t>(attr->format)];
vertCount = std::max(vertCount, static_cast<uint32_t>(std::floor(positions.size() / info.count)));
channels.emplace_back(Channel{stride, positions, *attr});
stride += info.size;
}
if (geometry.normals.has_value() && !geometry.normals.value().empty()) {
attr = nullptr;
if (geometry.attributes.has_value()) {
for (const auto &att : geometry.attributes.value()) {
if (att.name == gfx::ATTR_NAME_NORMAL) {
attr = &att;
break;
}
}
}
if (attr == nullptr) {
attr = &defAttrs[1];
}
attributes.emplace_back(*attr);
const auto &info = gfx::GFX_FORMAT_INFOS[static_cast<uint32_t>(attr->format)];
vertCount = std::max(vertCount, static_cast<uint32_t>(std::floor(geometry.normals->size() / info.count)));
channels.emplace_back(Channel{stride, geometry.normals.value(), *attr});
stride += info.size;
}
if (geometry.uvs.has_value() && !geometry.uvs.value().empty()) {
attr = nullptr;
if (geometry.attributes.has_value()) {
for (const auto &att : geometry.attributes.value()) {
if (att.name == gfx::ATTR_NAME_TEX_COORD) {
attr = &att;
break;
}
}
}
if (attr == nullptr) {
attr = &defAttrs[2];
}
attributes.emplace_back(*attr);
const auto &info = gfx::GFX_FORMAT_INFOS[static_cast<uint32_t>(attr->format)];
vertCount = std::max(vertCount, static_cast<uint32_t>(std::floor(geometry.uvs->size() / info.count)));
channels.emplace_back(Channel{stride, geometry.uvs.value(), *attr});
stride += info.size;
}
if (geometry.tangents.has_value() && !geometry.tangents.value().empty()) {
attr = nullptr;
if (geometry.attributes.has_value()) {
for (const auto &att : geometry.attributes.value()) {
if (att.name == gfx::ATTR_NAME_TANGENT) {
attr = &att;
break;
}
}
}
if (attr == nullptr) {
attr = &defAttrs[3];
}
attributes.emplace_back(*attr);
const auto &info = gfx::GFX_FORMAT_INFOS[static_cast<uint32_t>(attr->format)];
vertCount = std::max(vertCount, static_cast<uint32_t>(std::floor(geometry.tangents->size() / info.count)));
channels.emplace_back(Channel{stride, geometry.tangents.value(), *attr});
stride += info.size;
}
if (geometry.colors.has_value() && !geometry.colors.value().empty()) {
attr = nullptr;
if (geometry.attributes.has_value()) {
for (const auto &att : geometry.attributes.value()) {
if (att.name == gfx::ATTR_NAME_COLOR) {
attr = &att;
break;
}
}
}
if (attr == nullptr) {
attr = &defAttrs[4];
}
attributes.emplace_back(*attr);
const auto &info = gfx::GFX_FORMAT_INFOS[static_cast<uint32_t>(attr->format)];
vertCount = std::max(vertCount, static_cast<uint32_t>(std::floor(geometry.colors->size() / info.count)));
channels.emplace_back(Channel{stride, geometry.colors.value(), *attr});
stride += info.size;
}
if (geometry.customAttributes.has_value()) {
for (const auto &ca : geometry.customAttributes.value()) {
const auto &info = gfx::GFX_FORMAT_INFOS[static_cast<uint32_t>(attr->format)];
attributes.emplace_back(ca.attr);
vertCount = std::max(vertCount, static_cast<uint32_t>(std::floor(ca.values.size() / info.count)));
channels.emplace_back(Channel{stride, ca.values, ca.attr});
stride += info.size;
}
}
// Use this to generate final merged buffer.
BufferBlob bufferBlob;
// Fill vertex buffer.
auto *vertexBuffer = ccnew ArrayBuffer(vertCount * stride);
DataView vertexBufferView(vertexBuffer);
for (const auto &channel : channels) {
writeBuffer(vertexBufferView, channel.data, channel.attribute.format, channel.offset, stride);
}
bufferBlob.setNextAlignment(0);
Mesh::IVertexBundle vertexBundle;
Mesh::IBufferView buffferView;
buffferView.offset = bufferBlob.getLength();
buffferView.length = static_cast<uint32_t>(vertexBuffer->byteLength());
buffferView.count = vertCount;
buffferView.stride = stride;
vertexBundle.attributes = attributes;
vertexBundle.view = buffferView;
bufferBlob.addBuffer(vertexBuffer);
// Fill index buffer.
ArrayBuffer::Ptr indexBuffer;
uint32_t idxCount = 0;
const uint32_t idxStride = 2;
if (geometry.indices.has_value()) {
const ccstd::vector<uint32_t> &indices = geometry.indices.value();
idxCount = static_cast<uint32_t>(indices.size());
indexBuffer = ccnew ArrayBuffer(idxStride * idxCount);
DataView indexBufferView(indexBuffer);
writeBuffer(indexBufferView, indices, gfx::Format::R16UI);
}
// Create primitive.
Mesh::ISubMesh primitive;
primitive.vertexBundelIndices = {0};
primitive.primitiveMode = geometry.primitiveMode.has_value() ? geometry.primitiveMode.value() : gfx::PrimitiveMode::TRIANGLE_LIST;
if (indexBuffer) {
bufferBlob.setNextAlignment(idxStride);
Mesh::IBufferView bufferView;
bufferView.offset = bufferBlob.getLength();
bufferView.length = indexBuffer->byteLength();
bufferView.count = idxCount;
bufferView.stride = idxStride;
primitive.indexView = bufferView;
bufferBlob.addBuffer(indexBuffer);
}
ccstd::optional<Vec3> minPosition = geometry.minPos;
if (!minPosition.has_value() && options.calculateBounds.has_value() && options.calculateBounds.value()) {
minPosition = Vec3(std::numeric_limits<float>::infinity(), std::numeric_limits<float>::infinity(), std::numeric_limits<float>::infinity());
for (uint32_t iVertex = 0; iVertex < vertCount; ++iVertex) {
Vec3::min(minPosition.value(), Vec3(positions[iVertex * 3 + 0], positions[iVertex * 3 + 1], positions[iVertex * 3 + 2]), &minPosition.value());
}
}
ccstd::optional<Vec3> maxPosition = geometry.maxPos;
if (!maxPosition.has_value() && options.calculateBounds.has_value() && options.calculateBounds.value()) {
maxPosition = Vec3(-std::numeric_limits<float>::infinity(), -std::numeric_limits<float>::infinity(), -std::numeric_limits<float>::infinity());
for (uint32_t iVertex = 0; iVertex < vertCount; ++iVertex) {
Vec3::max(maxPosition.value(), Vec3(positions[iVertex * 3 + 0], positions[iVertex * 3 + 1], positions[iVertex * 3 + 2]), &maxPosition.value());
}
}
// Create mesh struct
Mesh::IStruct meshStruct;
meshStruct.vertexBundles = {vertexBundle};
meshStruct.primitives = {primitive};
if (minPosition.has_value()) {
meshStruct.minPosition = minPosition.value();
}
if (maxPosition.has_value()) {
meshStruct.maxPosition = maxPosition.value();
}
Mesh::ICreateInfo createInfo;
createInfo.structInfo = std::move(meshStruct);
createInfo.data = Uint8Array(bufferBlob.getCombined());
return createInfo;
}
static inline uint32_t getPadding(uint32_t length, uint32_t align) {
if (align > 0U) {
const uint32_t remainder = length % align;
if (remainder != 0U) {
const uint32_t padding = align - remainder;
return padding;
}
}
return 0U;
}
Mesh *MeshUtils::createDynamicMesh(index_t primitiveIndex, const IDynamicGeometry &geometry, Mesh *out /*= nullptr*/, const ICreateDynamicMeshOptions &options /*= {}*/) {
if (!out) {
out = ccnew Mesh();
}
out->reset(MeshUtils::createDynamicMeshInfo(geometry, options));
out->initialize();
out->updateSubMesh(primitiveIndex, geometry);
return out;
}
Mesh::ICreateInfo MeshUtils::createDynamicMeshInfo(const IDynamicGeometry &geometry, const ICreateDynamicMeshOptions &options /* = {}*/) {
gfx::AttributeList attributes;
uint32_t stream = 0U;
if (!geometry.positions.empty()) {
attributes.push_back({gfx::ATTR_NAME_POSITION, gfx::Format::RGB32F, false, stream++, false, 0U});
}
if (geometry.normals.has_value() && !geometry.normals.value().empty()) {
attributes.push_back({gfx::ATTR_NAME_NORMAL, gfx::Format::RGB32F, false, stream++, false, 0U});
}
if (geometry.uvs.has_value() && !geometry.uvs.value().empty()) {
attributes.push_back({gfx::ATTR_NAME_TEX_COORD, gfx::Format::RG32F, false, stream++, false, 0U});
}
if (geometry.tangents.has_value() && !geometry.tangents.value().empty()) {
attributes.push_back({gfx::ATTR_NAME_TANGENT, gfx::Format::RGBA32F, false, stream++, false, 0U});
}
if (geometry.colors.has_value() && !geometry.colors.value().empty()) {
attributes.push_back({gfx::ATTR_NAME_COLOR, gfx::Format::RGBA32F, false, stream++, false, 0U});
}
if (geometry.customAttributes.has_value()) {
for (const auto &ca : geometry.customAttributes.value()) {
auto attr = ca.attr;
attr.stream = stream++;
attributes.emplace_back(attr);
}
}
ccstd::vector<Mesh::IVertexBundle> vertexBundles;
ccstd::vector<Mesh::ISubMesh> primitives;
uint32_t dataSize = 0U;
for (auto i = 0U; i < options.maxSubMeshes; i++) {
Mesh::ISubMesh primitive;
primitive.primitiveMode = geometry.primitiveMode.has_value() ? geometry.primitiveMode.value() : gfx::PrimitiveMode::TRIANGLE_LIST;
// add vertex buffers
for (const auto &attr : attributes) {
const auto &formatInfo = gfx::GFX_FORMAT_INFOS[static_cast<uint32_t>(attr.format)];
uint32_t vertexBufferSize = options.maxSubMeshVertices * formatInfo.size;
Mesh::IBufferView vertexView = {
dataSize,
vertexBufferSize,
0U,
formatInfo.size};
Mesh::IVertexBundle vertexBundle = {
0U,
vertexView,
{attr}};
const auto vertexBundleIndex = static_cast<uint32_t>(vertexBundles.size());
primitive.vertexBundelIndices.emplace_back(vertexBundleIndex);
vertexBundles.emplace_back(vertexBundle);
dataSize += vertexBufferSize;
}
// add index buffer
uint32_t stride = 0U;
if (geometry.indices16.has_value() && !geometry.indices16.value().empty()) {
stride = sizeof(uint16_t);
} else if (geometry.indices32.has_value() && !geometry.indices32.value().empty()) {
stride = sizeof(uint32_t);
}
if (stride > 0U) {
dataSize += getPadding(dataSize, stride);
uint32_t indexBufferSize = options.maxSubMeshIndices * stride;
Mesh::IBufferView indexView = {
dataSize,
indexBufferSize,
0U,
stride};
primitive.indexView = indexView;
dataSize += indexBufferSize;
}
primitives.emplace_back(primitive);
}
Mesh::IDynamicInfo dynamicInfo = {options.maxSubMeshes,
options.maxSubMeshVertices,
options.maxSubMeshIndices};
Mesh::IDynamicStruct dynamicStruct;
dynamicStruct.info = dynamicInfo;
dynamicStruct.bounds.resize(options.maxSubMeshes);
for (auto &bound : dynamicStruct.bounds) {
bound.setValid(false);
}
Mesh::IStruct meshStruct;
meshStruct.vertexBundles = vertexBundles;
meshStruct.primitives = primitives;
meshStruct.dynamic = std::move(dynamicStruct);
Mesh::ICreateInfo createInfo;
createInfo.structInfo = std::move(meshStruct);
createInfo.data = Uint8Array(dataSize);
return createInfo;
}
void MeshUtils::inflateMesh(const Mesh::IStruct &structInfo, Uint8Array &data) {
uLongf uncompressedSize = 0U;
for (const auto &prim : structInfo.primitives) {
if (prim.indexView.has_value()) {
uncompressedSize += prim.indexView->length + prim.indexView->stride;
}
if (prim.cluster.has_value()) {
uncompressedSize += prim.cluster->vertexView.length + prim.cluster->vertexView.stride;
uncompressedSize += prim.cluster->triangleView.length + prim.cluster->triangleView.stride;
uncompressedSize += prim.cluster->clusterView.length + prim.cluster->clusterView.stride;
uncompressedSize += prim.cluster->coneView.length + prim.cluster->coneView.stride;
}
}
for (const auto &vb : structInfo.vertexBundles) {
uncompressedSize += vb.view.length + vb.view.stride;
}
auto uncompressedData = Uint8Array(static_cast<uint32_t>(uncompressedSize));
auto res = uncompress(uncompressedData.buffer()->getData(), &uncompressedSize, data.buffer()->getData(), data.byteLength());
data = Uint8Array(uncompressedData.buffer(), 0, static_cast<uint32_t>(uncompressedSize));
}
void MeshUtils::decodeMesh(Mesh::IStruct &structInfo, Uint8Array &data) {
BufferBlob bufferBlob;
for (auto &bundle : structInfo.vertexBundles) {
auto &view = bundle.view;
auto bound = view.count * view.stride;
auto *buffer = ccnew ArrayBuffer(bound);
auto vertex = Uint8Array(data.buffer(), view.offset, view.length);
int res = meshopt_decodeVertexBuffer(buffer->getData(), view.count, view.stride, vertex.buffer()->getData() + vertex.byteOffset(), view.length);
if (res < 0) {
assert(false && "failed to decode vertex buffer");
}
bufferBlob.setNextAlignment(view.stride);
Mesh::IVertexBundle vertexBundle;
Mesh::IBufferView buffferView;
buffferView.offset = bufferBlob.getLength();
buffferView.length = bound;
buffferView.count = view.count;
buffferView.stride = view.stride;
bufferBlob.addBuffer(buffer);
bundle.view = buffferView;
}
for (auto &primitive : structInfo.primitives) {
if (!primitive.indexView.has_value()) {
continue;
}
auto view = *primitive.indexView;
auto bound = view.count * view.stride;
auto *buffer = ccnew ArrayBuffer(bound);
auto index = DataView(data.buffer(), view.offset, view.length);
int res = meshopt_decodeIndexBuffer(buffer->getData(), view.count, view.stride, index.buffer()->getData() + index.byteOffset(), view.length);
if (res < 0) {
assert(false && "failed to decode index buffer");
}
bufferBlob.setNextAlignment(view.stride);
Mesh::IBufferView buffferView;
buffferView.offset = bufferBlob.getLength();
buffferView.length = bound;
buffferView.count = view.count;
buffferView.stride = view.stride;
bufferBlob.addBuffer(buffer);
primitive.indexView = buffferView;
}
data = Uint8Array(bufferBlob.getCombined());
}
} // namespace cc

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cocos/3d/misc/CreateMesh.h Normal file
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@@ -0,0 +1,101 @@
/****************************************************************************
Copyright (c) 2021-2023 Xiamen Yaji Software Co., Ltd.
http://www.cocos.com
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.
****************************************************************************/
#pragma once
#include "base/std/optional.h"
#include "3d/assets/Mesh.h"
#include "primitive/PrimitiveDefine.h"
namespace cc {
struct ICreateMeshOptions {
/**
* @en calculate mesh's aabb or not
* @zh 是否计算模型的包围盒。
*/
ccstd::optional<bool> calculateBounds;
};
struct ICreateDynamicMeshOptions {
/**
* @en max submesh count
* @zh 最大子模型个数。
*/
uint32_t maxSubMeshes{1U};
/**
* @en max submesh vertex count
* @zh 子模型最大顶点个数。
*/
uint32_t maxSubMeshVertices{1024U};
/**
* @en max submesh index count
* @zh 子模型最大索引个数。
*/
uint32_t maxSubMeshIndices{1024U};
};
/**
* @en mesh utility class, use to create mesh.
* @zh 网格工具类，用于创建网格。
*/
class MeshUtils {
public:
/**
* @en create a static mesh.
* @zh 创建一个静态网格。
*/
static Mesh *createMesh(const IGeometry &geometry, Mesh *out = nullptr, const ICreateMeshOptions &options = {});
/**
* @en create a static mesh ICreateInfo.
* @zh 创建一个静态网格ICreateInfo。
*/
static Mesh::ICreateInfo createMeshInfo(const IGeometry &geometry, const ICreateMeshOptions &options = {});
/**
* @en create a dynamic mesh.
* @zh 创建一个动态网格。
*/
static Mesh *createDynamicMesh(index_t primitiveIndex, const IDynamicGeometry &geometry, Mesh *out = nullptr, const ICreateDynamicMeshOptions &options = {});
/**
* @en create a dynamic mesh ICreateInfo.
* @zh 创建一个动态网格ICreateInfo。
*/
static Mesh::ICreateInfo createDynamicMeshInfo(const IDynamicGeometry &geometry, const ICreateDynamicMeshOptions &options = {});
/**
*
*/
static void inflateMesh(const Mesh::IStruct &structInfo, Uint8Array &data);
static void decodeMesh(Mesh::IStruct &structInfo, Uint8Array &data);
static void dequantizeMesh(Mesh::IStruct &structInfo, Uint8Array &data);
};
} // namespace cc