logo
down
shadow

Converting glm::lookat matrix to quaternion and back


Converting glm::lookat matrix to quaternion and back

Content Index :

Converting glm::lookat matrix to quaternion and back
Tag : cpp , By : Jim Davis
Date : November 24 2020, 05:44 AM


Comments
No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

Matrix result converting to quaternion and back has values flipped?


Tag : chash , By : user187301
Date : March 29 2020, 07:55 AM
it helps some times One of the other solutions for converting quaternions to matrixes seems to work:
/// <summary>
/// Converts the quaternion to it's matrix representation.
/// </summary>
/// <returns>A matrix representing the quaternion.</returns>
public Matrix ToMatrix()
{
    if (!this.Normalized)
        return this.Normalize().ToMatrix();

    double xx = X * X;
    double xy = X * Y;
    double xz = X * Z;
    double xw = X * W;

    double yy = Y * Y;
    double yz = Y * Z;
    double yw = Y * W;

    double zz = Z * Z;
    double zw = Z * W;

    return new Matrix(new double[,]
    {
        { 1 - 2 * (yy + zz), 2 * (xy - zw), 2 * (xz + yw), 0 },
        { 2 * (xy + zw), 1 - 2 * (xx + zz), 2 * (yz - xw), 0 },
        { 2 * (xz - yw), 2 * (yz + xw), 1 - 2 * (xx + yy), 0 },
        { 0, 0, 0, 1 }
    });
}

Converting glm quaternion to rotation matrix and using it with opengl


Tag : cpp , By : user165871
Date : March 29 2020, 07:55 AM
Hope that helps GLM won't/can't(?) automagically cast a mat4 to GLfloat* so you have to help it along a bit.
Try this:
#include <glm/gtc/type_ptr.hpp> 
glMultMatrixf( glm::value_ptr( glm::mat4_cast(orientation) ) );
glMultMatrixf( &glm::mat4_cast(orientation)[0][0] );

Eigen: matrix to quaternion and back have different result


Tag : development , By : Robert MacGregor
Date : March 29 2020, 07:55 AM
will help you Just checked the implementation of Eigen's matrix to quaternion conversion. It is based on "Quaternion Calculus and Fast Animation", by Ken Shoemake.
And as one can see when analyzing the source, this assumes that the matrix is indeed a rotation matrix (or close to one). In fact all symmetric matrices with M.trace()>0 will result in a (scaled) identity quaternion. If you expect anything else for invalid rotation matrices, you need to implement your own conversion method.

Glm Quaternion lookat function


Tag : cpp , By : AnToni00
Date : November 25 2020, 01:01 AM

Trouble converting matrix to quaternion and back


Tag : cpp , By : Dominique Vocat
Date : March 29 2020, 07:55 AM
Related Posts Related QUESTIONS :
  • Is it possible to roll a significantly faster version of modf
  • Updating pointer using signals and slots
  • How are classes more secure than structures?
  • finding "distance" between two pixel's colors
  • C++ Greatest Number Verification
  • Why does my token return NULL and how can I fix it?(c++)
  • C++ enforce conditions on inherited classes
  • what happened if an exception is not captured?
  • Redundant naming in C/C++ typedefs/structs
  • question about STL thread-safe and STL debugging
  • killing a separate thread having a socket
  • Returning the size of available virtual memory at run-time in C++
  • Parallel computing for integrals
  • How do I force my std::map to deallocate memory used?
  • C++ Templates: implicit conversion, no matching function for call to ctor
  • Adding python script to c++ project
  • C++ private pointer "leaking"?
  • Initializing Primitive Array to One Value
  • how is push_back implemented in STL vector?
  • C++ Profiling: KiFastSystemCallRet
  • Multiple rows with a single INSERT in SQLServer 2008
  • Use super class's address/pointer in initialization list
  • double fork using vfork
  • Convert char pointer (char*) to struct
  • Does anyone have good tips for using pc-lint?
  • C++ How fast is passing around objects?
  • template type's ctor arguments at instantiation time
  • Get list of windows in taskbar on Windows 7?
  • Curl connection options
  • Best cross-platform solution for network server?
  • simple c++ file opening issue
  • Switching from C++ (with a lot of STL use) to C for interpreter building
  • How can I access the JPEG image pixels as a 3D array like we do in MATLAB?
  • What wording in the C++ standard allows static_cast<non-void-type*>(malloc(N)); to work?
  • Avoid allocating in constructor or preserve simplicity (and RAII?)
  • Can C++ raise an error when std array initialization is too small?
  • Reference to end is ambiguous
  • Problem with basic usage of std::enable_if
  • How to print out a decimal number as octal number using setiosflags in C++
  • Open Visual Studio with solution and specific file and line
  • Enum value based on template type
  • Is there any way to swap nodes in std::list?
  • How to copy QString into wchar_t buffer
  • Make the compiler generate an empty default function for an std::function
  • Insert or push_back to end of a std::vector?
  • Best practice for const temporary types
  • Include CSV File in Complied Binary
  • Issue with binding non static function to callback
  • How can read from some files and write content of them with different form into files with same names
  • Why does auto deduce this variable as double and not float?
  • no instance of overloaded function "std::make_unique" matches the argument list, but works with unique_ptr con
  • How to see array size from a pointer in c++
  • Error taking address of temporary in Eclipse
  • Using an iterator to go through a vector and modify the contents
  • Are extern extern "C", and extern "C" extern, allowed?
  • Can't solve C2660 and C2065 Errors
  • C referencing C++ extern
  • How to write the definition of a derived class in c++?
  • Why when I include <cmath> I need to use the namespace std too?
  • How to assign a 32-bit unsigned integer to a bit field containing 32 bits
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com