Method draw

core/3d/Terrain.cpp:123–200

}

void Terrain::draw(ax::Renderer* renderer, const ax::Mat4& transform, uint32_t flags)
{
    auto modelMatrix = getNodeToWorldTransform();
    if (memcmp(&modelMatrix, &_terrainModelMatrix, sizeof(Mat4)) != 0)
    {
        _terrainModelMatrix = modelMatrix;
        _quadRoot->preCalculateAABB(_terrainModelMatrix);
    }

    auto& projectionMatrix = _director->getMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_PROJECTION);
    auto finalMatrix       = projectionMatrix * transform;
    _programState->setUniform(_mvpMatrixLocation, &finalMatrix.m, sizeof(finalMatrix.m));

    _programState->setUniform(_lightDirLocation, &_lightDir, sizeof(_lightDir));
    if (!_alphaMap)
    {
        _programState->setTexture(_detailMapLocation[0], 0, _detailMapTextures[0]->getBackendTexture());
        int hasAlphaMap = 0;
        _programState->setUniform(_alphaIsHasAlphaMapLocation, &hasAlphaMap, sizeof(hasAlphaMap));
    }
    else
    {
        float detailMapSize[4] = {0.0f, 0.0f, 0.0f, 0.0f};
        for (int i = 0; i < _maxDetailMapValue; ++i)
        {
            _programState->setTexture(_detailMapLocation[i], i, _detailMapTextures[i]->getBackendTexture());
            detailMapSize[i] = _terrainData._detailMaps[i]._detailMapSize;
        }
        _programState->setUniform(_detailMapSizeLocation, detailMapSize, sizeof(detailMapSize));

        int hasAlphaMap = 1;
        _programState->setUniform(_alphaIsHasAlphaMapLocation, &hasAlphaMap, sizeof(hasAlphaMap));
        _programState->setTexture(_alphaMapLocation, 4, _alphaMap->getBackendTexture());
    }
    if (_lightMap)
    {
        int hasLightMap = 1;
        _programState->setUniform(_lightMapCheckLocation, &hasLightMap, sizeof(hasLightMap));
        _programState->setTexture(_lightMapLocation, 5, _lightMap->getBackendTexture());
    }
    else
    {
        int hasLightMap = 0;
        _programState->setUniform(_lightMapCheckLocation, &hasLightMap, sizeof(hasLightMap));
#ifdef AX_USE_METAL
        _programState->setTexture(_lightMapLocation, 5, _dummyTexture->getBackendTexture());
#endif
    }
    auto camera = Camera::getVisitingCamera();

    if (memcmp(&_CameraMatrix, &camera->getViewMatrix(), sizeof(Mat4)) != 0)
    {
        _isCameraViewChanged = true;
        _CameraMatrix        = camera->getViewMatrix();
    }

    if (_isCameraViewChanged)
    {