diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/lib/conversion/rotation.cpp | 142 | ||||
-rw-r--r-- | src/lib/conversion/rotation.h | 8 |
2 files changed, 150 insertions, 0 deletions
diff --git a/src/lib/conversion/rotation.cpp b/src/lib/conversion/rotation.cpp index 614877b18..e17715733 100644 --- a/src/lib/conversion/rotation.cpp +++ b/src/lib/conversion/rotation.cpp @@ -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; + } + } +} diff --git a/src/lib/conversion/rotation.h b/src/lib/conversion/rotation.h index 0c56494c5..5187b448f 100644 --- a/src/lib/conversion/rotation.h +++ b/src/lib/conversion/rotation.h @@ -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_ */ |