+ v3_muls( n0, -(1.0f-t), up );
+ v3_muladds( up, n2, -t, up );
+ v3_normalize( up );
+
+ v3_sub( pd,p,v0 );
+ v3_cross( up, v0, right );
+ v3_normalize( right );
+
+ float cur_x = (1.0f-t)*h[0][3] + t*h[2][3];
+
+ v3f sc, sa, sb, down;
+ v3_muladds( p, right, cur_x * k_line_width, sc );
+ v3_muladds( sc, up, 1.5f, sc );
+ v3_muladds( sc, right, k_line_width*0.95f, sa );
+ v3_muladds( sc, right, 0.0f, sb );
+ v3_muls( up, -1.0f, down );
+
+ ray_hit ha, hb;
+ ha.dist = 8.0f;
+ hb.dist = 8.0f;
+
+ int resa = ray_world( world, sa, down, &ha ),
+ resb = ray_world( world, sb, down, &hb );
+
+ if( resa && resb ){
+ struct world_surface *surfa = ray_hit_surface( world, &ha ),
+ *surfb = ray_hit_surface( world, &hb );
+
+ if( (surfa->info.flags & k_material_flag_skate_target) &&
+ (surfb->info.flags & k_material_flag_skate_target) )
+ {
+ scene_vert va, vb;
+
+ float gap = vg_fractf(cur_x*0.5f)*0.02f;
+
+ v3_muladds( ha.pos, up, 0.06f+gap, va.co );
+ v3_muladds( hb.pos, up, 0.06f+gap, vb.co );
+
+ scene_vert_pack_norm( &va, up );
+ scene_vert_pack_norm( &vb, up );
+
+ float t1 = (travel_length / total_length) * patch_count;
+ va.uv[0] = t1;
+ va.uv[1] = 0.0f;
+ vb.uv[0] = t1;
+ vb.uv[1] = 1.0f;
+
+ scene_push_vert( world->scene_lines, &va );
+ scene_push_vert( world->scene_lines, &vb );
+
+ if( last_valid ){
+ /* Connect them with triangles */
+ scene_push_tri( world->scene_lines, (u32[3]){
+ last_valid+0-2, last_valid+1-2, last_valid+2-2} );
+ scene_push_tri( world->scene_lines, (u32[3]){
+ last_valid+1-2, last_valid+3-2, last_valid+2-2} );
+ }
+
+ last_valid = world->scene_lines->vertex_count;
+ }
+ else
+ last_valid = 0;
+ }
+ else
+ last_valid = 0;
+
+ if( t == 1.0f )
+ return;
+
+ t += 1.0f*mod;
+ if( t > 1.0f )
+ t = 1.0f;
+
+ v3_copy( p, last );