mirror of
https://github.com/TTimo/GtkRadiant.git
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153 lines
4.1 KiB
C++
153 lines
4.1 KiB
C++
/*
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This code is based on source provided under the terms of the Id Software
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LIMITED USE SOFTWARE LICENSE AGREEMENT, a copy of which is included with the
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GtkRadiant sources (see LICENSE_ID). If you did not receive a copy of
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LICENSE_ID, please contact Id Software immediately at info@idsoftware.com.
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All changes and additions to the original source which have been developed by
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other contributors (see CONTRIBUTORS) are provided under the terms of the
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license the contributors choose (see LICENSE), to the extent permitted by the
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LICENSE_ID. If you did not receive a copy of the contributor license,
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please contact the GtkRadiant maintainers at info@gtkradiant.com immediately.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "q_shared.h"
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#include <float.h>
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angles_t ang_zero( 0.0f, 0.0f, 0.0f );
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void toAngles( mat3_t &src, angles_t &dst ) {
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double theta;
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double cp;
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double sp;
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sp = src[ 0 ][ 2 ];
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// cap off our sin value so that we don't get any NANs
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if ( sp > 1.0 ) {
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sp = 1.0;
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} else if ( sp < -1.0 ) {
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sp = -1.0;
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}
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theta = -asin( sp );
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cp = cos( theta );
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if ( cp > 8192 * FLT_EPSILON ) {
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dst.pitch = theta * 180 / M_PI;
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dst.yaw = atan2( src[ 0 ][ 1 ], src[ 0 ][ 0 ] ) * 180 / M_PI;
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dst.roll = atan2( src[ 1 ][ 2 ], src[ 2 ][ 2 ] ) * 180 / M_PI;
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} else {
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dst.pitch = theta * 180 / M_PI;
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dst.yaw = -atan2( src[ 1 ][ 0 ], src[ 1 ][ 1 ] ) * 180 / M_PI;
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dst.roll = 0;
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}
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}
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void toAngles( quat_t &src, angles_t &dst ) {
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mat3_t temp;
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toMatrix( src, temp );
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toAngles( temp, dst );
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}
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void toAngles( idVec3 &src, angles_t &dst ) {
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dst.pitch = src[ 0 ];
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dst.yaw = src[ 1 ];
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dst.roll = src[ 2 ];
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}
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void angles_t::toVectors( idVec3 *forward, idVec3 *right, idVec3 *up ) {
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float angle;
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static float sr, sp, sy, cr, cp, cy; // static to help MS compiler fp bugs
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angle = yaw * ( M_PI * 2 / 360 );
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sy = sin( angle );
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cy = cos( angle );
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angle = pitch * ( M_PI * 2 / 360 );
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sp = sin( angle );
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cp = cos( angle );
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angle = roll * ( M_PI * 2 / 360 );
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sr = sin( angle );
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cr = cos( angle );
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if ( forward ) {
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forward->set( cp * cy, cp * sy, -sp );
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}
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if ( right ) {
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right->set( -sr * sp * cy + cr * sy, -sr * sp * sy + -cr * cy, -sr * cp );
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}
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if ( up ) {
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up->set( cr * sp * cy + -sr * -sy, cr * sp * sy + -sr * cy, cr * cp );
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}
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}
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idVec3 angles_t::toForward( void ) {
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float angle;
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static float sp, sy, cp, cy; // static to help MS compiler fp bugs
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angle = yaw * ( M_PI * 2 / 360 );
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sy = sin( angle );
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cy = cos( angle );
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angle = pitch * ( M_PI * 2 / 360 );
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sp = sin( angle );
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cp = cos( angle );
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return idVec3( cp * cy, cp * sy, -sp );
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}
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/*
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=================
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Normalize360
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returns angles normalized to the range [0 <= angle < 360]
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=================
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*/
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angles_t& angles_t::Normalize360( void ) {
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pitch = (360.0 / 65536) * ( ( int )( pitch * ( 65536 / 360.0 ) ) & 65535 );
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yaw = (360.0 / 65536) * ( ( int )( yaw * ( 65536 / 360.0 ) ) & 65535 );
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roll = (360.0 / 65536) * ( ( int )( roll * ( 65536 / 360.0 ) ) & 65535 );
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return *this;
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}
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/*
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=================
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Normalize180
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returns angles normalized to the range [-180 < angle <= 180]
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=================
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*/
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angles_t& angles_t::Normalize180( void ) {
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Normalize360();
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if ( pitch > 180.0 ) {
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pitch -= 360.0;
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}
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if ( yaw > 180.0 ) {
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yaw -= 360.0;
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}
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if ( roll > 180.0 ) {
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roll -= 360.0;
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}
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return *this;
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}
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