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lib/conversion: added rotate_3f() 

will be used for user specified rotations in sensor drivers
This commit is contained in:
Andrew Tridgell 2014-07-03 14:02:05 +10:00 committed by Lorenz Meier
parent e4e152a85b
commit f56724f7df
2 changed files with 150 additions and 0 deletions
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142
src/lib/conversion/rotation.cpp
View File

@ -49,3 +49,145 @@ get_rot_matrix(enum Rotation rot, math::Matrix<3,3> *rot_matrix)
rot_matrix->from_euler(roll, pitch, yaw);
}
#define HALF_SQRT_2 0.70710678118654757f
__EXPORT void
rotate_3f(enum Rotation rot, float &x, float &y, float &z)
{
float tmp;
switch (rot) {
case ROTATION_NONE:
case ROTATION_MAX:
return;
case ROTATION_YAW_45: {
tmp = HALF_SQRT_2*(x - y);
y = HALF_SQRT_2*(x + y);
x = tmp;
return;
}
case ROTATION_YAW_90: {
tmp = x; x = -y; y = tmp;
return;
}
case ROTATION_YAW_135: {
tmp = -HALF_SQRT_2*(x + y);
y = HALF_SQRT_2*(x - y);
x = tmp;
return;
}
case ROTATION_YAW_180:
x = -x; y = -y;
return;
case ROTATION_YAW_225: {
tmp = HALF_SQRT_2*(y - x);
y = -HALF_SQRT_2*(x + y);
x = tmp;
return;
}
case ROTATION_YAW_270: {
tmp = x; x = y; y = -tmp;
return;
}
case ROTATION_YAW_315: {
tmp = HALF_SQRT_2*(x + y);
y = HALF_SQRT_2*(y - x);
x = tmp;
return;
}
case ROTATION_ROLL_180: {
y = -y; z = -z;
return;
}
case ROTATION_ROLL_180_YAW_45: {
tmp = HALF_SQRT_2*(x + y);
y = HALF_SQRT_2*(x - y);
x = tmp; z = -z;
return;
}
case ROTATION_ROLL_180_YAW_90: {
tmp = x; x = y; y = tmp; z = -z;
return;
}
case ROTATION_ROLL_180_YAW_135: {
tmp = HALF_SQRT_2*(y - x);
y = HALF_SQRT_2*(y + x);
x = tmp; z = -z;
return;
}
case ROTATION_PITCH_180: {
x = -x; z = -z;
return;
}
case ROTATION_ROLL_180_YAW_225: {
tmp = -HALF_SQRT_2*(x + y);
y = HALF_SQRT_2*(y - x);
x = tmp; z = -z;
return;
}
case ROTATION_ROLL_180_YAW_270: {
tmp = x; x = -y; y = -tmp; z = -z;
return;
}
case ROTATION_ROLL_180_YAW_315: {
tmp = HALF_SQRT_2*(x - y);
y = -HALF_SQRT_2*(x + y);
x = tmp; z = -z;
return;
}
case ROTATION_ROLL_90: {
tmp = z; z = y; y = -tmp;
return;
}
case ROTATION_ROLL_90_YAW_45: {
tmp = z; z = y; y = -tmp;
tmp = HALF_SQRT_2*(x - y);
y = HALF_SQRT_2*(x + y);
x = tmp;
return;
}
case ROTATION_ROLL_90_YAW_90: {
tmp = z; z = y; y = -tmp;
tmp = x; x = -y; y = tmp;
return;
}
case ROTATION_ROLL_90_YAW_135: {
tmp = z; z = y; y = -tmp;
tmp = -HALF_SQRT_2*(x + y);
y = HALF_SQRT_2*(x - y);
x = tmp;
return;
}
case ROTATION_ROLL_270: {
tmp = z; z = -y; y = tmp;
return;
}
case ROTATION_ROLL_270_YAW_45: {
tmp = z; z = -y; y = tmp;
tmp = HALF_SQRT_2*(x - y);
y = HALF_SQRT_2*(x + y);
x = tmp;
return;
}
case ROTATION_ROLL_270_YAW_90: {
tmp = z; z = -y; y = tmp;
tmp = x; x = -y; y = tmp;
return;
}
case ROTATION_ROLL_270_YAW_135: {
tmp = z; z = -y; y = tmp;
tmp = -HALF_SQRT_2*(x + y);
y = HALF_SQRT_2*(x - y);
x = tmp;
return;
}
case ROTATION_PITCH_90: {
tmp = z; z = -x; x = tmp;
return;
}
case ROTATION_PITCH_270: {
tmp = z; z = x; x = -tmp;
return;
}
}
}

8
src/lib/conversion/rotation.h
View File

@ -118,4 +118,12 @@ const rot_lookup_t rot_lookup[] = {
__EXPORT void
get_rot_matrix(enum Rotation rot, math::Matrix<3,3> *rot_matrix);
/**
* rotate a 3 element float vector in-place
*/
__EXPORT void
rotate_3f(enum Rotation rot, float &x, float &y, float &z);
#endif /* ROTATION_H_ */