Directx11 study notes 5-d3dxmath Library

Directx11 introduced a mathematical library for vector matrix calculation, and used 128 bits to calculate four 32-bit data records simultaneously (SIMD)

Previously, we basically used the directx10math. h header file. Since this math library is new, it must have been much faster and optimized in terms of convenient hardware processing. Technology is endless. We recommend that you use a new

Now, you can use the xnamath. h directx9 10 11 library separately, which is very convenient. The following table can quickly find the replacement function from the previous Math library.

By the way, we met a pitfall last night. It has been solved for a long time. It turns out that the xmatrix xmvector in xnamath involves an alignment problem.

If it is a local variable or a global variable, it cannot be felt. The hardware is automatically aligned. However, if it is placed in a class member variable, it is easy to report an error. And you cannot see the problem.

Debugging has been performed for a long time. Therefore, when using this library, we try to avoid setting it as a class member variable.

In the next section, I will attach the complete source code of the previous package to the xnamath library and draw a triangle. All subsequent tutorials will be demonstrated on this source code.

Quick query of their differences:

D3DXMath TypeDirectXMath EquivalentD3DXFLOAT16HALFD3DXMATRIXA16XMMATRIX or XMFLOAT4X4AD3DXQUATERNIOND3DXPLANED3DXCOLORXMVECTOR is used rather than having unique types, so you will likely need to use an XMFLOAT4Note  D3DXQUATERNION::operator * calls the D3DXQuaternionMultiply function, which multiplies two quaternions. But, unless you explicitly use the XMQuaternionMultiply function, you get an incorrect answer when you use XMVECTOR::operator * on a quaternion.D3DXVECTOR2XMFLOAT2D3DXVECTOR2_16FXMHALF2D3DXVECTOR3XMFLOAT3D3DXVECTOR4XMFLOAT4(or if you can guarantee the data is 16-byte aligned, XMVECTOR or XMFLOAT4A )D3DXVECTOR4_16FXMHALF4 Note  There is no direct equivalent to D3DXVECTOR3_16F in XNAMath.D3DXMath MacroDirectXMath EquivalentD3DX_PIXM_PID3DX_1BYPIXM_1DIVPID3DXToRadianXMConvertToRadiansD3DXToDegreeXMConvertToDegrees D3DXMath FunctionDirectXMath EquivalentD3DXBoxBoundProbeBoundingBox::Intersects(XMVECTOR, XMVECTOR, float&)D3DXComputeBoundingBoxBoundingBox::CreateFromPointsD3DXComputeBoundingSphereBoundingSphere::CreateFromPointsD3DXSphereBoundProbeBoundingSphere::Intersects(XMVECTOR, XMVECTOR, float&)D3DXIntersectTriFunctionTriangleTests::IntersectsD3DXFloat32To16ArrayXMConvertFloatToHalfStreamD3DXFloat16To32ArrayXMConvertHalfToFloatStreamD3DXVec2LengthXMVector2Length or XMVector2LengthEstD3DXVec2LengthSqXMVector2LengthSqD3DXVec2DotXMVector2DotD3DXVec2CCWXMVector2CrossD3DXVec2AddXMVectorAddD3DXVec2SubtractXMVectorSubtractD3DXVec2MinimizeXMVectorMinD3DXVec2MaximizeXMVectorMaxD3DXVec2ScaleXMVectorScaleD3DXVec2LerpXMVectorLerp or XMVectorLerpVD3DXVec2NormalizeXMVector2Normalize or XMVector2NormalizeEstD3DXVec2HermiteXMVectorHermite or XMVectorHermiteVD3DXVec2CatmullRomXMVectorCatmullRom or XMVectorCatmullRomVD3DXVec2BaryCentricXMVectorBaryCentric or XMVectorBaryCentricVD3DXVec2TransformXMVector2TransformD3DXVec2TransformCoordXMVector2TransformCoordD3DXVec2TransformNormalXMVector2TransformNormalD3DXVec2TransformArrayXMVector2TransformStreamD3DXVec2TransformCoordArrayXMVector2TransformCoordStreamD3DXVec2TransformNormalArrayXMVector2TransformNormalStreamD3DXVec3LengthXMVector3Length or XMVector3LengthEstD3DXVec3LengthSqXMVector3LengthSqD3DXVec3DotXMVector3DotD3DXVec3CrossXMVector3CrossD3DXVec3AddXMVectorAddD3DXVec3SubtractXMVectorSubtractD3DXVec3MinimizeXMVectorMinD3DXVec3MaximizeXMVectorMaxD3DXVec3ScaleXMVectorScaleD3DXVec3LerpXMVectorLerp or XMVectorLerpVD3DXVec3NormalizeXMVector3Normalize or XMVector3NormalizeEstD3DXVec3HermiteXMVectorHermite or XMVectorHermiteVD3DXVec3CatmullRomXMVectorCatmullRom or XMVectorCatmullRomVD3DXVec3BaryCentricXMVectorBaryCentric or XMVectorBaryCentricVD3DXVec3TransformXMVector3TransformD3DXVec3TransformCoordXMVector3TransformCoordD3DXVec3TransformNormalXMVector3TransformNormalD3DXVec3TransformArrayXMVector3TransformStreamD3DXVec3TransformCoordArrayXMVector3TransformCoordStreamD3DXVec3TransformNormalArrayXMVector3TransformNormalStreamD3DXVec3ProjectXMVector3ProjectD3DXVec3UnprojectXMVector3UnprojectD3DXVec3ProjectArrayXMVector3ProjectStreamD3DXVec3UnprojectArrayXMVector3UnprojectStreamD3DXVec4LengthXMVector4Length or XMVector4LengthEstD3DXVec4LengthSqXMVector4LengthSqD3DXVec4DotXMVector4DotD3DXVec4AddXMVectorAddD3DXVec4SubtractXMVectorSubtractD3DXVec4MinimizeXMVectorMinD3DXVec4MaximizeXMVectorMaxD3DXVec4ScaleXMVectorScaleD3DXVec4LerpXMVectorLerp or XMVectorLerpVD3DXVec4CrossXMVector4CrossD3DXVec4NormalizeXMVector4Normalize or XMVector4NormalizeEstD3DXVec4HermiteXMVectorHermite or XMVectorHermiteVD3DXVec4CatmullRomXMVectorCatmullRom or XMVectorCatmullRomVD3DXVec4BaryCentricXMVectorBaryCentric or XMVectorBaryCentricVD3DXVec4TransformXMVector4TransformD3DXVec4TransformArrayXMVector4TransformStreamD3DXMatrixIdentityXMMatrixIdentityD3DXMatrixDeterminantXMMatrixDeterminantD3DXMatrixDecomposeXMMatrixDecomposeD3DXMatrixTransposeXMMatrixTransposeD3DXMatrixMultiplyXMMatrixMultiplyD3DXMatrixMultiplyTransposeXMMatrixMultiplyTransposeD3DXMatrixInverseXMMatrixInverseD3DXMatrixScalingXMMatrixScalingD3DXMatrixTranslationXMMatrixTranslationD3DXMatrixRotationXXMMatrixRotationXD3DXMatrixRotationYXMMatrixRotationYD3DXMatrixRotationZXMMatrixRotationZD3DXMatrixRotationAxisXMMatrixRotationAxisD3DXMatrixRotationQuaternionXMMatrixRotationQuaternionD3DXMatrixRotationYawPitchRollXMMatrixRotationRollPitchYaw (Note the order of parameters is different: D3DXMatrixRotationYawPitchRoll takes yaw, pitch, roll, XMMatrixRotationRollPitchYaw takes pitch, yaw, roll)D3DXMatrixTransformationXMMatrixTransformationD3DXMatrixTransformation2DXMMatrixTransformation2DD3DXMatrixAffineTransformationXMMatrixAffineTransformationD3DXMatrixAffineTransformation2DXMMatrixAffineTransformation2DD3DXMatrixLookAtRHXMMatrixLookAtRHD3DXMatrixLookAtLHXMMatrixLookAtLHD3DXMatrixPerspectiveRHXMMatrixPerspectiveRHD3DXMatrixPerspectiveLHXMMatrixPerspectiveLHD3DXMatrixPerspectiveFovRHXMMatrixPerspectiveFovRHD3DXMatrixPerspectiveFovLHXMMatrixPerspectiveFovLHD3DXMatrixPerspectiveOffCenterRHXMMatrixPerspectiveOffCenterRHD3DXMatrixPerspectiveOffCenterLHXMMatrixPerspectiveOffCenterLHD3DXMatrixOrthoRHXMMatrixOrthographicRHD3DXMatrixOrthoLHXMMatrixOrthographicLHD3DXMatrixOrthoOffCenterRHXMMatrixOrthographicOffCenterRHD3DXMatrixOrthoOffCenterLHXMMatrixOrthographicOffCenterLHD3DXMatrixShadowXMMatrixShadowD3DXMatrixReflectXMMatrixReflectD3DXQuaternionLengthXMQuaternionLengthD3DXQuaternionLengthSqXMQuaternionLengthSqD3DXQuaternionDotXMQuaternionDotD3DXQuaternionIdentityXMQuaternionIdentityD3DXQuaternionIsIdentityXMQuaternionIsIdentityD3DXQuaternionConjugateXMQuaternionConjugateD3DXQuaternionToAxisAngleXMQuaternionToAxisAngleD3DXQuaternionRotationMatrixXMQuaternionRotationMatrixD3DXQuaternionRotationAxisXMQuaternionRotationAxisD3DXQuaternionRotationYawPitchRollXMQuaternionRotationRollPitchYaw (Note the order of parameters is different: D3DXQuaternionRotationYawPitchRoll takes yaw, pitch, roll, XMQuaternionRotationRollPitchYaw takes pitch, yaw, roll)D3DXQuaternionMultiplyXMQuaternionMultiplyD3DXQuaternionNormalizeXMQuaternionNormalize or XMQuaternionNormalizeEstD3DXQuaternionInverseXMQuaternionInverseD3DXQuaternionLnXMQuaternionLnD3DXQuaternionExpXMQuaternionExpD3DXQuaternionSlerpXMQuaternionSlerp or XMQuaternionSlerpVD3DXQuaternionSquadXMQuaternionSquad or XMQuaternionSquadVD3DXQuaternionSquadSetupXMQuaternionSquadSetupD3DXQuaternionBaryCentricXMQuaternionBaryCentric or XMQuaternionBaryCentricVD3DXPlaneDotXMPlaneDotD3DXPlaneDotCoordXMPlaneDotCoordD3DXPlaneDotNormalXMPlaneDotNormalD3DXPlaneScaleXMVectorScaleD3DXPlaneNormalizeXMPlaneNormalize or XMPlaneNormalizeEstD3DXPlaneIntersectLineXMPlaneIntersectLineD3DXPlaneFromPointNormalXMPlaneFromPointNormalD3DXPlaneFromPointsXMPlaneFromPointsD3DXPlaneTransformXMPlaneTransformD3DXPlaneTransformArrayXMPlaneTransformStreamD3DXColorNegativeXMColorNegativeD3DXColorAddXMVectorAddD3DXColorSubtractXMVectorSubtractD3DXColorScaleXMVectorScaleD3DXColorModulateXMColorModulateD3DXColorLerpXMVectorLerp or XMVectorLerpVD3DXColorAdjustSaturationXMColorAdjustSaturationD3DXColorAdjustContrastXMColorAdjustContrastD3DXFresnelTermXMFresnelTerm

Directx11 study notes 5-d3dxmath Library