网站建设排名公司哪家好,做网站的公司需要什么资质,wordpress 单页面 主题,网站建设 网站运营期待结果#xff1a; 流程 1. 通过C写入数据到纹理贴图 2. 在材质中通过采样能正确读取写入的数值 踩坑#xff1a; 1. UE5之后#xff0c;需要设置采样类型#xff0c;才能达到上图效果#xff0c;默认采样类型做了插值计算 FColor中写入 PF_B8G8R8A8
UTexture2D* Conve…期待结果 流程
1. 通过C写入数据到纹理贴图 2. 在材质中通过采样能正确读取写入的数值 踩坑
1. UE5之后需要设置采样类型才能达到上图效果默认采样类型做了插值计算 FColor中写入 PF_B8G8R8A8
UTexture2D* ConvertFloatArr2Texture(TArrayFVector inFArr) {if (inFArr.IsEmpty()) return nullptr;//FlushRenderingCommands();uint32 len inFArr.Num();float templen FMath::Sqrt(len);uint32 text_len FMath::CeilToInt(templen);text_len FMath::CeilToInt(log2(text_len));text_len FMath::Pow(2, text_len);uint32 Totallen FMath::Pow(text_len, 2);FColor* datas new FColor[Totallen];for (uint32 i 0; i Totallen;i) {if (i len) {FColor Tempcolor;Tempcolor.B inFArr[i].X;Tempcolor.G inFArr[i].Y;Tempcolor.R inFArr[i].Z;Tempcolor.A 255;datas[i] Tempcolor;}else {FColor Tempcolor(0,0,0,1);datas[i] Tempcolor;}}UTexture2D* temp UTexture2D::CreateTransient(text_len, text_len, PF_B8G8R8A8);temp-Filter TF_Nearest;void* TextureData temp-GetPlatformData()-Mips[0].BulkData.Lock(LOCK_READ_WRITE);FPlatformMemory::Memcpy(TextureData, datas, Totallen * sizeof(uint8)*4);temp-GetPlatformData()-Mips[0].BulkData.Unlock();temp-UpdateResource();return temp;
}FFloat16数据写入PF_FloatRGBA
void ConvertFloatArr2Texture(TArrayfloat inFArr, int width, int height) {if (inFArr.IsEmpty()) return;FFloat16* datas new FFloat16[height * width * 4];for (auto it 0; it 256; it) {FFloat16 ff(inFArr[it]);datas[it] ff;}UTexture2D* temp UTexture2D::CreateTransient(width, height, PF_FloatRGBA);temp-Filter TF_Nearest;//temp-MipGenSettings TextureMipGenSettings::TMGS_NoMipmaps;//temp-CompressionSettings TextureCompressionSettings::TC_VectorDisplacementmap;void* TextureData temp-GetPlatformData()-Mips[0].BulkData.Lock(LOCK_READ_WRITE);FMemory::Memmove(TextureData, datas, height * width * 4 * sizeof(FFloat16));temp-GetPlatformData()-Mips[0].BulkData.Unlock();// 更新纹理数据temp-UpdateResource();}
将FFloat32写入PF_R32G32B32F类型贴图
UTexture2D* ConvertFloatArr2Texture(TArrayFVector inFArr) {if (inFArr.IsEmpty()) return nullptr;//FlushRenderingCommands();uint32 len inFArr.Num();float templen FMath::Sqrt(len);uint32 text_len FMath::CeilToInt(templen);text_len FMath::CeilToInt(log2(text_len));text_len FMath::Pow(2, text_len);uint32 Totallen FMath::Pow(text_len, 2);FFloat32* datas new FFloat32[Totallen*4];for (uint32 i 0; i Totallen;i) {if (i len) {datas[i * 3 0] inFArr[i].X;datas[i * 3 1] inFArr[i].Y;datas[i * 3 2] inFArr[i].Z;}else {datas[i * 4 0] 0.0f;datas[i * 4 1] 0.0f;datas[i * 4 2] 0.0f;}}UTexture2D* temp UTexture2D::CreateTransient(text_len, text_len, PF_R32G32B32F);temp-Filter TF_Nearest;void* TextureData temp-GetPlatformData()-Mips[0].BulkData.Lock(LOCK_READ_WRITE);FPlatformMemory::Memcpy(TextureData, datas, Totallen * sizeof(FFloat32)*3);temp-GetPlatformData()-Mips[0].BulkData.Unlock();temp-UpdateResource();return temp;
}
写入FLinearColor到PF_A32B32G32R32F格式的贴图
UTexture2D* ConvertFloatArr2Texture(TArrayFVector inFArr) {if (inFArr.IsEmpty()) return nullptr;//FlushRenderingCommands();uint32 len inFArr.Num();float templen FMath::Sqrt(len);uint32 text_len FMath::CeilToInt(templen);text_len FMath::CeilToInt(log2(text_len));text_len FMath::Pow(2, text_len);uint32 Totallen FMath::Pow(text_len, 2);FLinearColor* datas new FLinearColor[Totallen];for (uint32 i 0; i Totallen;i) {if (i len) {datas[i].R inFArr[i].X;datas[i].G inFArr[i].Y;datas[i].B inFArr[i].Z;datas[i].A 1.0;}else {datas[i].R 0.0;datas[i].G 0.0;datas[i].B 0.0;datas[i].A 1.0;}}UTexture2D* temp UTexture2D::CreateTransient(text_len, text_len, PF_A32B32G32R32F);temp-Filter TF_Nearest;void* TextureData temp-GetPlatformData()-Mips[0].BulkData.Lock(LOCK_READ_WRITE);FPlatformMemory::Memcpy(TextureData, datas, Totallen * sizeof(FLinearColor));temp-GetPlatformData()-Mips[0].BulkData.Unlock();temp-UpdateResource();return temp;
}
FFloat16数据写入灰度图PF_R16F
UTexture2D* ConvertFloatArr2Gray(TArrayFFloat16 inFArr, int32 width, int32 height) {if (inFArr.IsEmpty()) return nullptr;UTexture2D* temp UTexture2D::CreateTransient(width, height, PF_R16F);temp-MipGenSettings TextureMipGenSettings::TMGS_NoMipmaps;void* TextureData temp-GetPlatformData()-Mips[0].BulkData.Lock(LOCK_READ_WRITE);FMemory::Memzero(TextureData, width* height * sizeof(FFloat16));//temp-SRGB false;//temp-CompressionSettings TC_Displacementmap;FMemory::Memmove(TextureData, inFArr.GetData(), inFArr.Num() * sizeof(FFloat16));temp-GetPlatformData()-Mips[0].BulkData.Unlock();// 更新纹理数据temp-UpdateResource();UpdateKrigingTexture(temp);return temp;
}
纹理采样
方案一
for(int inw0;inwpoint_width;inw)
{float2 Kriging_UVfloat2(0,0);Kriging_UV[0]float1(inw/point_width);for(int inh0;inhpoint_height;inh){Kriging_UV[1]float1(inh/point_height);//计算UV偏移float2 offsetfloat2(point_width,point_height);offset1/offset;Kriging_UVfloat2(offset*offsetCoordKriging_UV);//float4 point_TTexture2DSample(in_Tex,Material.Texture2D_0Sampler, Kriging_UV);float3 point_Tin_Tex.Load(int3(Kriging_UV,0));}
}
方案二
float4 hTexture2DSample(tex,texSampler,uv)
return h;
//另外采样方式
//float3 point_Tin_Tex.Load(int3(Kriging_UV,0));
