C++ (Cpp) MakeHTrans Examples

Example #1

File: camera.cpp Project: cychiuae/rotamina-4tcejorp-1144pmoc

void Camera::calculateViewingTransformParameters() 
{
	// compute new transformation based on
	// user interaction
	Mat4f dollyXform;
	Mat4f azimXform;
	Mat4f elevXform;
	Mat4f twistXform;
	Mat4f originXform;

	Vec3f upVector;

	MakeHTrans(dollyXform, Vec3f(0,0,mDolly));
	MakeHRotY(azimXform, mAzimuth);
	MakeHRotX(elevXform, mElevation);
	MakeDiagonal(twistXform, 1.0f);
	MakeHTrans(originXform, mLookAt);
	
	mPosition = Vec3f(0,0,0);

	mPosition = originXform * (azimXform * (elevXform * (dollyXform * mPosition)));

	if ( fmod(double(mElevation), 2.0*M_PI) < -M_PI/2 || fmod(double(mElevation), 2.0*M_PI) > M_PI/2 )
		mUpVector= Vec3f(0,-1,0);
	else
		mUpVector= Vec3f(0,1,0);

	mDirtyTransform = false;
}

Example #2

File: camera.cpp Project: COMP4411-Project-Group/Modeller

void Camera::calculateViewingTransformParameters() 
{
	Mat4f dollyXform;
	Mat4f azimXform;
	Mat4f elevXform;
	Mat4f twistXform;
	Mat4f originXform;

	Vec3f upVector;

	MakeHTrans(dollyXform, Vec3f(0,0,mDolly));
	MakeHRotY(azimXform, mAzimuth);
	MakeHRotX(elevXform, mElevation);
	MakeDiagonal(twistXform, 1.0f);
	MakeHTrans(originXform, mLookAt);
	
	mPosition = Vec3f(0,0,0);
	// grouped for (mat4 * vec3) ops instead of (mat4 * mat4) ops
	mPosition = originXform * (azimXform * (elevXform * (dollyXform * mPosition)));

	if ( fmod((double)mElevation, 2.0*M_PI) < 3*M_PI/2 && fmod((double)mElevation, 2.0*M_PI) > M_PI/2 )
		mUpVector= Vec3f(0,-1,0);
	else
		mUpVector= Vec3f(0,1,0);

	mDirtyTransform = false;
}

Example #3

File: camera.cpp Project: xufang2004007/4411pa2

void Camera::calculateViewingTransformParameters() 
{
	Mat4f dollyXform;
	Mat4f azimXform;
	Mat4f elevXform;
	Mat4f twistXform;
	Mat4f originXform;

	MakeHTrans(dollyXform, Vec3f(0,0,mDolly));
	MakeHRotY(azimXform, mAzimuth);
	MakeHRotX(elevXform, mElevation);
	MakeDiagonal(twistXform, 1.0f);
	MakeHTrans(originXform, mLookAt);
	
	mPosition = Vec3f(0,0,0);
	// grouped for (mat4 * vec3) ops instead of (mat4 * mat4) ops
	mPosition = originXform * (azimXform * (elevXform * (dollyXform * mPosition)));
	Vec3f nx = originXform * (azimXform * (elevXform * (dollyXform * Vec3f(1, 0, 0))));
	Vec3f ny = originXform * (azimXform * (elevXform * (dollyXform * Vec3f(0, 1, 0))));

	mUpVector = nx*sin(mTwist) + ny*cos(mTwist);

	mDirtyTransform = false;
}