/*----------------------------------------------------------------------
GetRotation()
Purpose: gets the rotation of an animated object with a certain name
In parameters:
al - the linked list of Animations
name - the name of the Animation
time - the time of the wanted rotation
Out parameters:
Rout - the rotation at time. (Rout[0],Rout[1],Rout[2]) is the
rotation axis, and Rout[3] is the rotation angle (in radians)
about that axis
Returns:
TRUE if there was a rotation with "name", else FALSE (and the
axis is (1,0,0) and the angle is 0.0
Note: this routine does not check if the object is visible or not.
----------------------------------------------------------------------*/
int GetRotation(Stack<Animation*> *al,char* name, double time, double Rout[4])
{
Animation* a = FindAnimation(name,al);
if(a)
{
_GetRotation(a, time, Rout);
return TRUE;
}
Rout[0]=1.0; Rout[1]=0.0; Rout[2]=0.0; Rout[3]=0.0;
return FALSE;
}
void _GetMatrix(Animation* animation, double time, double m[4][4])
{
Animation* a = (Animation*) animation;
/* m = translation * rotation * scale */
/* Rotation. */
if(a->rotations)
{
double drot[4];
_GetRotation(a, time, drot);
Rotation3 RR;
RR.x = drot[0];
RR.y = drot[1];
RR.z = drot[2];
RR.angle = drot[3];
Quaternion q;
FromAngleAxis(&q, RR.angle, RR.x, RR.y, RR.z);
QuatToMatrix(&q, m); /* Also sets bottom row to 0 0 0 1 */
}
else
{
m[0][0] = 1; m[0][1] = 0; m[0][2] = 0; m[0][3] = 0;
m[1][0] = 0; m[1][1] = 1; m[1][2] = 0; m[1][3] = 0;
m[2][0] = 0; m[2][1] = 0; m[2][2] = 1; m[2][3] = 0;
m[3][0] = 0; m[3][1] = 0; m[3][2] = 0; m[3][3] = 1;
}
/* Concatenate with scaling. */
if(a->scales)
{
double S[3];
_GetScale(a, time, S);
m[0][0] *= S[0]; m[0][1] *= S[1]; m[0][2] *= S[2];
m[1][0] *= S[0]; m[1][1] *= S[1]; m[1][2] *= S[2];
m[2][0] *= S[0]; m[2][1] *= S[1]; m[2][2] *= S[2];
}
/* Translation. */
if(a->translations)
{
double P[3];
_GetTranslation(a, time, P);
m[0][3] = P[0];
m[1][3] = P[1];
m[2][3] = P[2];
}
}
int GetRotation(struct AnimationList *al, char* name, double time,
double Rout[4])
{
void* a = FindAnimation(name, al);
Animation* anim = (Animation*) a;
if(a)
{
_GetRotation(anim, time, Rout);
return TRUE;
}
Rout[0] = 1.0;
Rout[1] = 0.0;
Rout[2] = 0.0;
Rout[3] = 0.0;
return FALSE;
}
