Matrix3x2 SliceRenderer::calculateFacingRotationMatrix() {
assert(_sliceFramePtr);
Vector3 viewPos = _view->_sliceViewMatrix * _position;
float dir = atan2(viewPos.x, viewPos.z) + _facing;
float s = sin(dir);
float c = cos(dir);
Matrix3x2 mRotation(c, -s, 0.0f,
s, c, 0.0f);
Matrix3x2 mView(_view->_sliceViewMatrix(0,0), _view->_sliceViewMatrix(0,1), 0.0f,
_view->_sliceViewMatrix(2,0), _view->_sliceViewMatrix(2,1), 0.0f);
return mView * mRotation;
}
void GCamera::buildViewMatrix()
{
XMVECTOR vecLookW = XMVector3Normalize(GMathFV(mLook));
XMVECTOR vecRightW = XMVector3Normalize(XMVector3Cross(GMathFV(mUp), vecLookW));
XMVECTOR vecUpW = XMVector3Normalize(XMVector3Cross(vecLookW, vecRightW));
XMVECTOR vecPosW = GMathFV(mPosition);
float x = -GMathVF(XMVector3Dot(vecPosW, vecRightW)).x;
float y = -GMathVF(XMVector3Dot(vecPosW, vecUpW)).x;
float z = -GMathVF(XMVector3Dot(vecPosW, vecLookW)).x;
mRight = GMathVF(vecRightW);
mUp = GMathVF(vecUpW);
mLook = GMathVF(vecLookW);
mView(0, 0) = mRight.x;
mView(1, 0) = mRight.y;
mView(2, 0) = mRight.z;
mView(3, 0) = x;
mView(0, 1) = mUp.x;
mView(1, 1) = mUp.y;
mView(2, 1) = mUp.z;
mView(3, 1) = y;
mView(0, 2) = mLook.x;
mView(1, 2) = mLook.y;
mView(2, 2) = mLook.z;
mView(3, 2) = z;
mView(0, 3) = 0.0f;
mView(1, 3) = 0.0f;
mView(2, 3) = 0.0f;
mView(3, 3) = 1.0f;
}
void Camera::UpdateViewMatrix()
{
XMVECTOR R = XMLoadFloat3(&mRight);
XMVECTOR U = XMLoadFloat3(&mUp);
XMVECTOR L = XMLoadFloat3(&mLook);
XMVECTOR P = XMLoadFloat3(&mPosition);
// Keep camera's axes orthogonal to each other and of unit length.
L = XMVector3Normalize(L);
U = XMVector3Normalize(XMVector3Cross(L, R));
// U, L already ortho-normal, so no need to normalize cross product.
R = XMVector3Cross(U, L);
// Fill in the view matrix entries.
float x = -XMVectorGetX(XMVector3Dot(P, R));
float y = -XMVectorGetX(XMVector3Dot(P, U));
float z = -XMVectorGetX(XMVector3Dot(P, L));
XMStoreFloat3(&mRight, R);
XMStoreFloat3(&mUp, U);
XMStoreFloat3(&mLook, L);
mView(0,0) = mRight.x;
mView(1,0) = mRight.y;
mView(2,0) = mRight.z;
mView(3,0) = x;
mView(0,1) = mUp.x;
mView(1,1) = mUp.y;
mView(2,1) = mUp.z;
mView(3,1) = y;
mView(0,2) = mLook.x;
mView(1,2) = mLook.y;
mView(2,2) = mLook.z;
mView(3,2) = z;
mView(0,3) = 0.0f;
mView(1,3) = 0.0f;
mView(2,3) = 0.0f;
mView(3,3) = 1.0f;
mSphereCollider.Center = mPosition;
}
void Camera::rebuildView()
{
// Keep camera's axes orthogonal to each other and of unit length.
D3DXVec3Normalize(&mLook, &mLook);
D3DXVec3Cross(&mUp, &mLook, &mRight);
D3DXVec3Normalize(&mUp, &mUp);
D3DXVec3Cross(&mRight, &mUp, &mLook);
D3DXVec3Normalize(&mRight, &mRight);
// Fill in the view matrix entries.
float x = -D3DXVec3Dot(&mPosition, &mRight);
float y = -D3DXVec3Dot(&mPosition, &mUp);
float z = -D3DXVec3Dot(&mPosition, &mLook);
mView(0,0) = mRight.x;
mView(1,0) = mRight.y;
mView(2,0) = mRight.z;
mView(3,0) = x;
mView(0,1) = mUp.x;
mView(1,1) = mUp.y;
mView(2,1) = mUp.z;
mView(3,1) = y;
mView(0,2) = mLook.x;
mView(1,2) = mLook.y;
mView(2,2) = mLook.z;
mView(3,2) = z;
mView(0,3) = 0.0f;
mView(1,3) = 0.0f;
mView(2,3) = 0.0f;
mView(3,3) = 1.0f;
}
void Camera:: UpdateViewMatrix()
{
XMVECTOR R = XMLoadFloat3(&mRight);
XMVECTOR U = XMLoadFloat3(&mUp);
XMVECTOR L = XMLoadFloat3(&mLook);
XMVECTOR P = XMLoadFloat3(&mPosition);
//
// Orthonormalize the right, up and look vectors.
//
// Make look vector unit length.
L = XMVector3Normalize(L);
// Compute a new corrected "up" vector and normalize it.
U = XMVector3Normalize(XMVector3Cross(L, R));
// Compute a new corrected "right" vector. U and L are
// already ortho-normal, so no need to normalize cross product.
// ||up × look|| = ||up|| ||look|| sin90° = 1
R = XMVector3Cross(U, L);
//
// Fill in the view matrix entries.
//
float x = -XMVectorGetX(XMVector3Dot(P, R));
float y = -XMVectorGetX(XMVector3Dot(P, U));
float z = -XMVectorGetX(XMVector3Dot(P, L));
XMStoreFloat3(&mRight, R);
XMStoreFloat3(&mUp, U);
XMStoreFloat3(&mLook, L);
mView(0,0) = mRight.x;
mView(1,0) = mRight.y;
mView(2,0) = mRight.z;
mView(3,0) = x;
mView(0,1) = mUp.x;
mView(1,1) = mUp.y;
mView(2,1) = mUp.z;
mView(3,1) = y;
mView(0,2) = mLook.x;
mView(1,2) = mLook.y;
mView(2,2) = mLook.z;
mView(3,2) = z;
mView(0,3) = 0.0f;
mView(1,3) = 0.0f;
mView(2,3) = 0.0f;
mView(3,3) = 1.0f;
}
void Camera::UpdateMatrix()
{
D3DXVECTOR3 R = mRight;
D3DXVECTOR3 U = mUp;
D3DXVECTOR3 L = mLook;
D3DXVECTOR3 P = mPosition;
D3DXVec3Normalize(&L, &L);
D3DXVECTOR3 temp;
D3DXVec3Cross(&temp, &L, &R);
D3DXVec3Normalize(&U, &temp);
D3DXVec3Cross(&R, &U, &L);
float x = -D3DXVec3Dot(&P, &R);
float y = -D3DXVec3Dot(&P, &U);
float z = -D3DXVec3Dot(&P, &L);
mRight = R;
mUp = U;
mLook = L;
mView(0, 0) = mRight.x;
mView(1, 0) = mRight.y;
mView(2, 0) = mRight.z;
mView(3, 0) = x;
mView(0, 1) = mUp.x;
mView(1, 1) = mUp.y;
mView(2, 1) = mUp.z;
mView(3, 1) = y;
mView(0, 2) = mLook.x;
mView(1, 2) = mLook.y;
mView(2, 2) = mLook.z;
mView(3, 2) = z;
mView(0, 3) = 0.0f;
mView(1, 3) = 0.0f;
mView(2, 3) = 0.0f;
mView(3, 3) = 1.0f;
}