GpuHelper Class Reference

Public Types
enum	ProjectionMode2D { PM_Normalized = 1, PM_Viewport = 2 }

Public Member Functions
void	pushProjectionMode2D (ProjectionMode2D pm)
void	popProjectionMode2D ()
template<typename Scalar , int _Flags>
void	multMatrix (const Matrix< Scalar, 4, 4, _Flags, 4, 4 > &mat, GLenum matrixTarget)
	Multiply the OpenGL matrix matrixTarget by the matrix mat. More...
template<typename Scalar , int _Flags>
void	loadMatrix (const Eigen::Matrix< Scalar, 4, 4, _Flags, 4, 4 > &mat, GLenum matrixTarget)
	Load the matrix mat to the OpenGL matrix matrixTarget. More...
template<typename Scalar , typename Derived >
void	loadMatrix (const Eigen::CwiseNullaryOp< Eigen::internal::scalar_identity_op< Scalar >, Derived > &, GLenum matrixTarget)
void	forceMatrixTarget (GLenum matrixTarget)
	Make the matrix matrixTarget the current OpenGL matrix target. More...
void	setMatrixTarget (GLenum matrixTarget)
template<typename Scalar , int _Flags>
void	pushMatrix (const Matrix< Scalar, 4, 4, _Flags, 4, 4 > &mat, GLenum matrixTarget)
	Push the OpenGL matrix matrixTarget and load mat.
template<typename Scalar , typename Derived >
void	pushMatrix (const Eigen::CwiseNullaryOp< Eigen::internal::scalar_identity_op< Scalar >, Derived > &, GLenum matrixTarget)
void	pushMatrix (GLenum matrixTarget)
	Push and clone the OpenGL matrix matrixTarget.
void	popMatrix (GLenum matrixTarget)
	Pop the OpenGL matrix matrixTarget.
void	drawVector (const Vector3f &position, const Vector3f &vec, const Color &color, float aspect=50.)
void	drawVectorBox (const Vector3f &position, const Vector3f &vec, const Color &color, float aspect=50.)
void	drawUnitCube (void)
void	drawUnitSphere (int level=0)
void	draw (GLenum mode, uint nofElement)
	draw the nofElement first elements
void	draw (GLenum mode, uint start, uint end)
	draw a range of elements
void	draw (GLenum mode, const std::vector< uint > *pIndexes)
	draw an indexed subset

Protected Member Functions
void	update (void)

Protected Attributes
GLuint	mColorBufferId
int	mVpWidth
int	mVpHeight
GLenum	mCurrentMatrixTarget
bool	mInitialized

Member Function Documentation

forceMatrixTarget()

void GpuHelper::forceMatrixTarget ( GLenum  matrixTarget )

inline

Make the matrix matrixTarget the current OpenGL matrix target.

Call this function before loadMatrix() or multMatrix() if you cannot guarantee that glMatrixMode() has never been called after the last loadMatrix() or multMatrix() calls.

Todo:

provides a debug mode checking the sanity of the cached matrix mode.

loadMatrix()

template<typename Scalar , int _Flags>

void GpuHelper::loadMatrix	(	const Eigen::Matrix< Scalar, 4, 4, _Flags, 4, 4 > &	mat,
		GLenum	matrixTarget
	)

Load the matrix mat to the OpenGL matrix matrixTarget.

Essentially, this helper function automatically calls glMatrixMode(matrixTarget) if required and does a proper call to the right glLoadMatrix*() or glLoadIdentity() function according to the scalar type and storage order.

Warning

glMatrixMode() must never be called directly. If your're unsure, use forceMatrixMode().

See also

Matrix, multMatrix(), forceMatrixMode()

multMatrix()

template<typename Scalar , int _Flags>

void GpuHelper::multMatrix	(	const Matrix< Scalar, 4, 4, _Flags, 4, 4 > &	mat,
		GLenum	matrixTarget
	)

Multiply the OpenGL matrix matrixTarget by the matrix mat.

Essentially, this helper function automatically calls glMatrixMode(matrixTarget) if required and does a proper call to the right glMultMatrix*() function according to the scalar type and storage order.

Warning

glMatrixMode() must never be called directly. If your're unsure, use forceMatrixMode().

See also

Matrix, loadMatrix(), forceMatrixMode()

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The documentation for this class was generated from the following files:

• vendor/eigen/demos/opengl/gpuhelper.h
• vendor/eigen/demos/opengl/gpuhelper.cpp