void multiply_matrices(matrix_t *m1, matrix_t *m2, matrix_t *m_result) { if (m_multiply(m1, m2, m_result) != SUCCESS) printf("Could not multiply matrices together. Check sizes\n"); else print_matrix("Result:", m_result); }
void sm_frame(sm_t *sm,int from,int to,float frame) { int i,frame0,frame1; if(from == -1) from = 0; if(to == -1) to = sm->num_frame; frame0 = (int)frame; frame -= frame0; frame0 += from; if(frame0 >= to) frame0 = ((frame0 - from) % (to - from)) + from; frame1 = frame0 + 1; if(frame1 >= to) frame1 = from; for(i = 0; i < sm->num_bone; i++) { float m0[16],m1[16]; float xyz0[3],xyz1[3],xyz[3],rot[4]; v_scale(sm->frame[frame0][i].xyz,1.0 - frame,xyz0); v_scale(sm->frame[frame1][i].xyz,frame,xyz1); v_add(xyz0,xyz1,xyz); q_slerp(sm->frame[frame0][i].rot,sm->frame[frame1][i].rot,frame,rot); m_translate(xyz,m0); q_to_matrix(rot,m1); m_multiply(m0,m1,sm->bone[i].matrix); } for(i = 0; i < sm->num_surface; i++) { int j; sm_surface_t *s = sm->surface[i]; for(j = 0; j < s->num_vertex; j++) { int k; v_set(0,0,0,s->vertex[j].xyz); v_set(0,0,0,s->vertex[j].normal); for(k = 0; k < s->vertex[j].num_weight; k++) { float v[3]; sm_weight_t *w = &s->vertex[j].weight[k]; v_transform(w->xyz,sm->bone[w->bone].matrix,v); v_scale(v,w->weight,v); v_add(s->vertex[j].xyz,v,s->vertex[j].xyz); v_transform_normal(w->normal,sm->bone[w->bone].matrix,v); v_scale(v,w->weight,v); v_add(s->vertex[j].normal,v,s->vertex[j].normal); } } } }