/*
==============
R_IQMBuildSkeleton
==============
*/
static int IQMBuildSkeleton( refSkeleton_t *skel, skelAnimation_t *skelAnim,
int startFrame, int endFrame, float frac )
{
int i;
IQAnim_t *anim;
transform_t *newPose, *oldPose;
vec3_t mins, maxs;
anim = skelAnim->iqm;
// Validate the frames so there is no chance of a crash.
// This will write directly into the entity structure, so
// when the surfaces are rendered, they don't need to be
// range checked again.
if( anim->flags & IQM_LOOP ) {
startFrame %= anim->num_frames;
endFrame %= anim->num_frames;
} else {
Q_clamp( startFrame, 0, anim->num_frames - 1 );
Q_clamp( endFrame, 0, anim->num_frames - 1 );
}
// compute frame pointers
oldPose = &anim->poses[ startFrame * anim->num_joints ];
newPose = &anim->poses[ endFrame * anim->num_joints ];
// calculate a bounding box in the current coordinate system
if( anim->bounds ) {
float *bounds = &anim->bounds[ 6 * startFrame ];
VectorCopy( bounds, mins );
VectorCopy( bounds + 3, maxs );
bounds = &anim->bounds[ 6 * endFrame ];
BoundsAdd( mins, maxs, bounds, bounds + 3 );
}
for ( i = 0; i < anim->num_joints; i++ )
{
TransStartLerp( &skel->bones[ i ].t );
TransAddWeight( 1.0f - frac, &oldPose[ i ], &skel->bones[ i ].t );
TransAddWeight( frac, &newPose[ i ], &skel->bones[ i ].t );
TransEndLerp( &skel->bones[ i ].t );
#if defined( REFBONE_NAMES )
Q_strncpyz( skel->bones[ i ].name, anim->name, sizeof( skel->bones[ i ].name ) );
#endif
skel->bones[ i ].parentIndex = anim->jointParents[ i ];
}
skel->numBones = anim->num_joints;
skel->type = refSkeletonType_t::SK_RELATIVE;
VectorCopy( mins, skel->bounds[ 0 ] );
VectorCopy( maxs, skel->bounds[ 1 ] );
return true;
}
/*
==============
RE_BlendSkeleton
==============
*/
int RE_BlendSkeleton(refSkeleton_t* skel, const refSkeleton_t* blend, float frac) {
int i;
vec3_t bounds[2];
if (skel->numBones != blend->numBones) {
ri.Printf(PRINT_WARNING,
"RE_BlendSkeleton: different number of bones %d != %d\n",
skel->numBones,
blend->numBones);
return false;
}
// lerp between the 2 bone poses
for (i = 0; i < skel->numBones; i++) {
transform_t trans;
TransStartLerp(&trans);
TransAddWeight(1.0f - frac, &skel->bones[i].t, &trans);
TransAddWeight(frac, &blend->bones[i].t, &trans);
TransEndLerp(&trans);
TransCopy(&trans, &skel->bones[i].t);
}
// calculate a bounding box in the current coordinate system
for (i = 0; i < 3; i++) {
bounds[0][i] = skel->bounds[0][i] < blend->bounds[0][i]
? skel->bounds[0][i]
: blend->bounds[0][i];
bounds[1][i] = skel->bounds[1][i] > blend->bounds[1][i]
? skel->bounds[1][i]
: blend->bounds[1][i];
}
VectorCopy(bounds[0], skel->bounds[0]);
VectorCopy(bounds[1], skel->bounds[1]);
return true;
}
