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Norwido

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About Norwido

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  1. It works now Short explanation: Broken joint values in vertex buffer. Long explanation: I checked multiple times if my joint or weight values from the glTF2 file were correct. I compared my values in RenderDoc with another program(which works) and everything seemed fine. But then I checked my values in Nvidia Nsight and it showed me broken values. I reworked my glTF2 importer and with the correct vertex buffer values my animation pose works. I have no idea how people can work without RenderDoc/Nsight.
  2. I didn't found a "Edit" button so I'm creating a new reply. I changed my Skeleton and SkeletonJoint class so that Skeleton has only a list of Joints and each SkeletonJoint has a pointer to it's parent, but no children. xmath::Matrix CSkeletonJoint::GetLocalMatrix() { xmath::Matrix localTM = m_transformMatrix; localTM *= xmath::Matrix::CreateScale(m_scale); localTM *= xmath::Matrix::CreateFromQuaternion(m_rotation); localTM *= xmath::Matrix::CreateTranslation(m_translation); return localTM; } xmath::Matrix CSkeletonJoint::GetWorldMatrix() { xmath::Matrix worldTM = this->GetLocalMatrix(); CSkeletonJoint* pParent = m_pParent; while (pParent != nullptr) { worldTM = pParent->GetLocalMatrix() * worldTM; pParent = pParent->GetParent(); } return worldTM; } I fill the JointMatrixArray in my Entity. for (int32_t i = 0; i != pSkeleton->GetJoints().size(); i++) { resource::CSkeletonJoint* pJoint = pSkeleton->GetJoints()[i]; xmath::Matrix jointMatrix = pSkeleton->GetInverseMatrices()[i] * pJoint->GetWorldMatrix(); jointMatrix *= m_pEntity->GetWorldTM().Invert(); m_jointMatrices[i] = jointMatrix; } I use Matrix::Transpose before I send it to the shader and I already tried to change the matrix multiplication order. If I rotate the first Joint(root) than the whole mesh rotates, but if I rotate the second Joint(child) it doesn't change at all. I already looked at the glTF2 reference implementation(WebGL) and other skeletal animation implementaions and I still can't find my multiplication error.
  3. I'm trying to implement skeletal animation from a glTF2 file with a very simple rigged model. https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0/RiggedSimple It has only two joints and three key frames. I have a Skeleton with a list of Joints. Each Joint has a position, rotation, scale and a inverse bind matrix, which I load directly from the glTF2 file. My Animation has a list of Tracks and each Track has a list of KeyFrames. Nothing special so far. I use the second KeyFrame, no movement right now, so the mesh should be bend. Now I have a AnimatedSkeleton which is a copy from the Skeleton and I apply the modifications from the KeyFrame to it. I recalculate all transforms on the AnimatedSkeleton, multiply each Joint world transform with the corresponding inverse bind matrix and fill my JointMatrix array. In RenderDoc I can see that my JointMatrix array gets filled, unfortunately the mesh is still in his binding pose. Quick question: It is correct that I replace the values and not add them right? So I do: animatedSkeleton.joint.rotation = animation.keyFrame.rotation and not animatedSkeleton.joint.rotation += animation.keyFrame.rotation Here is my HLSL vertex shader skinning code: matrix GetSkinningMatrix(VSInput vin) { matrix skin = Identity; #if defined(HAS_WEIGHT_SET1) && defined(HAS_JOINT_SET1) skin += mul(SkinJointMatrix[int(vin.joint0.x)], vin.weight0.x) + mul(SkinJointMatrix[int(vin.joint0.y)], vin.weight0.y) + mul(SkinJointMatrix[int(vin.joint0.z)], vin.weight0.z) + mul(SkinJointMatrix[int(vin.joint0.w)], vin.weight0.w); #endif return skin; } float4 GetPosition(VSInput vin) { float4 pos = float4(vin.position, 1.0); #ifdef USE_SKINNING pos = mul(pos, GetSkinningMatrix(vin)); #endif return pos; } And my SkeletonJoint methods to recalculate the transform and fill the JointMatrix array. void CSkeletonJoint::ApplyTransform(const xmath::Matrix& parentWorldTM) { xmath::Matrix scaleMat = xmath::Matrix::CreateScale(m_scale); xmath::Matrix rotMat = xmath::Matrix::CreateFromQuaternion(m_rotation); xmath::Matrix translateMat = xmath::Matrix::CreateTranslation(m_translation); m_localTM = xmath::Matrix(); m_localTM *= scaleMat; m_localTM *= rotMat; m_localTM *= translateMat; m_worldTM = parentWorldTM * m_localTM; for (CSkeletonJoint& childJoint : m_children) { childJoint.ApplyTransform(m_worldTM); } } void CSkeletonJoint::Apply(std::vector<xmath::Matrix>& jointMatrices) { xmath::Matrix jointMatrix = m_inverseBindMatrix * m_worldTM; jointMatrices[m_index] = jointMatrix; for (CSkeletonJoint& childJoint : m_children) { childJoint.Apply(jointMatrices); } } I do not recalculate the inverse binding matrix, I use it from the glTF2 file since I need the unmodified version right? I just don't see where I miscalculated the JointMatrix.
  4.     I read about that but I thought stbi_load would NOT decode it. Now that I think about it makes sense.     But if I want to pack my images in the future, I need to read the raw data without decoding.   If I read the PNG images with the winapi and not with stbi_load and  then use D3DX11CreateShaderResourceViewFromMemory it should work ?
  5. Hello,   for some tests i used D3DX11CreateShaderResourceViewFromFile and everything worked fine.   In the future i want to pack all my images in a container format and preload that file.   Now i want to preload all my images with stb_image.h and use them in D3D11.   MSDN says i can use D3DX11CreateShaderResourceViewFromMemory to do this.   What is the proper way to create a texture from a unsigned char* and use them ?     Loading image data: object.imageData = stbi_load(imagePath.c_str(), &object.width, &object.height, &object.bit, STBI_rgb_alpha); Creating texture from image data: result = D3DX11CreateShaderResourceViewFromMemory(m_pDevice, (void*)object.imageData, 0, NULL, NULL, &object.texture, NULL); I have some problems with the image data size. I tried various calculations, but even with result = S_OK it's crashing.
  6. Hi,   I am working on a multiplayer card game and thinking about how I handle the login. The connection to my backend happens automatically.   When creating a new account, I wanted to create a token and send it to the client. I have taken the timestamp and these hashed with the UUID in SHA. But that does not seem the best solution to me.   In Android, I can use the account manager to generate a token, but then a message prompt.   Clash of Clans uses a system to detect clients without login or message prompt and use facebook or google+ just for transfering the account.   What is the best practice to detect my clients without an active login or message promp ?
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