3 typedef enum { CLASS_IN = 1, CLASS_OUT = -1 } FERGUSON_KEY_CLASS, BEZIER_KEY_CLASS;
4 typedef class flag_interface { } VECT3DF_SIMPLE;
5 typedef struct vect3df {
8 typedef struct vect4df : public vect3df {
11 typedef class llist_item { } ANIM_KEY;
12 typedef class anim_track : public flag_interface, public llist_item { } ANIM_KEY_BEZ;
13 typedef class anim_track_bezier : public anim_track { } ANIM_KEY_BEZ_WVECT;
14 typedef class anim_track_bez_wvect : public anim_track_bezier {
15 WVECT * tangent(int kn, BEZIER_KEY_CLASS key_class, WVECT *p_tn);
16 } ANIM_TRACK_BEZ_WVECT;
17 WVECT * anim_track_bez_wvect::tangent(int kn, BEZIER_KEY_CLASS key_class, WVECT *p_tn)
19 float bias,continuity,tension,tn1,bp1;
20 WVECT *p_p0,*p_p1,*p_p2, t1, g1,g2,g3;
21 g1.x = (p_p1->x - p_p0->x)*bp1;
22 g1.y = (p_p1->y - p_p0->y)*bp1;
23 g1.z = (p_p1->z - p_p0->z)*bp1;
24 g1.w = (p_p1->w - p_p0->w)*bp1;
25 bp1 = (0.5f + key_class*0.5f*continuity);
26 p_tn->x = (g1.x + g3.x*bp1)*tn1;
27 p_tn->y = (g1.y + g3.y*bp1)*tn1;
28 p_tn->z = (g1.z + g3.z*bp1)*tn1;
29 p_tn->w = (g1.w + g3.w*bp1)*tn1;