void Matrix4_FromQuaternion( const quat_t q, mat4_t out )
{
mat3_t m;
Quat_ToMatrix3( q, m );
out[0 ] = m[0], out[1 ] = m[2], out[2 ] = m[6], out[3 ] = 0;
out[4 ] = m[1], out[5 ] = m[4], out[6 ] = m[7], out[7 ] = 0;
out[8 ] = m[2], out[9 ] = m[5], out[10] = m[8], out[11] = 0;
out[12] = 0, out[13] = 0, out[14] = 0, out[15] = 1;
}
/*
* R_AliasModelLerpTag
*/
qboolean R_AliasModelLerpTag( orientation_t *orient, const maliasmodel_t *aliasmodel, int oldframenum, int framenum, float lerpfrac, const char *name )
{
int i;
quat_t quat;
maliastag_t *tag, *oldtag;
// find the appropriate tag
for( i = 0; i < aliasmodel->numtags; i++ )
{
if( !Q_stricmp( aliasmodel->tags[i].name, name ) )
break;
}
if( i == aliasmodel->numtags )
{
//ri.Com_DPrintf ("R_AliasModelLerpTag: no such tag %s\n", name );
return qfalse;
}
// ignore invalid frames
if( ( framenum >= aliasmodel->numframes ) || ( framenum < 0 ) )
{
#ifndef PUBLIC_BUILD
ri.Com_DPrintf( "R_AliasModelLerpTag %s: no such oldframe %i\n", name, framenum );
#endif
framenum = 0;
}
if( ( oldframenum >= aliasmodel->numframes ) || ( oldframenum < 0 ) )
{
#ifndef PUBLIC_BUILD
ri.Com_DPrintf( "R_AliasModelLerpTag %s: no such oldframe %i\n", name, oldframenum );
#endif
oldframenum = 0;
}
tag = aliasmodel->tags + framenum * aliasmodel->numtags + i;
oldtag = aliasmodel->tags + oldframenum * aliasmodel->numtags + i;
// interpolate axis and origin
Quat_Lerp( oldtag->quat, tag->quat, lerpfrac, quat );
Quat_ToMatrix3( quat, orient->axis );
orient->origin[0] = oldtag->origin[0] + ( tag->origin[0] - oldtag->origin[0] ) * lerpfrac;
orient->origin[1] = oldtag->origin[1] + ( tag->origin[1] - oldtag->origin[1] ) * lerpfrac;
orient->origin[2] = oldtag->origin[2] + ( tag->origin[2] - oldtag->origin[2] ) * lerpfrac;
return qtrue;
}
