4 * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 // Automation point that takes floating point values
31 #include "floatautos.inc"
33 class FloatAuto : public Auto
35 friend class FloatAutos;
38 FloatAuto(EDL *edl, FloatAutos *autos);
41 bool is_floatauto() { return true; }
42 int operator==(Auto &that);
43 int operator==(FloatAuto &that);
44 int identical(FloatAuto *src);
45 void copy_from(Auto *that);
46 void copy_from(FloatAuto *that);
47 int interpolate_from(Auto *a1, Auto *a2, int64_t pos, Auto *templ=0); // bezier interpolation
48 void copy(int64_t start, int64_t end, FileXML *file, int default_only);
49 void load(FileXML *xml);
51 // "the value" (=payload of this keyframe)
52 float get_value() {return this->value;}
53 void set_value(float newval);
55 // Possible policies to handle the tagents for the
56 // bézier curves connecting adjacent automation points
59 SMOOTH, // curves are coupled in order to yield a smooth curve
60 LINEAR, // curves always pointing directly to neighbouring automation points
61 TFREE, // curves on both sides coupled but editable by dragging the handles
62 FREE // curves on both sides are independent and editable via GUI
66 void change_curve_mode(t_mode); // recalculates curves as well
67 void toggle_curve_mode(); // cycles through all modes (e.g. by ctrl-click)
69 // Control values (y coords of bézier control point), relative to value
70 float get_control_in_value() {check_pos(); return this->control_in_value;}
71 float get_control_out_value() {check_pos(); return this->control_out_value;}
72 void set_control_in_value(float newval);
73 void set_control_out_value(float newval);
75 // get calculated x-position of control points for drawing,
76 // relative to auto position, in native units of the track.
77 int64_t get_control_in_position() {check_pos(); return this->control_in_position;}
78 int64_t get_control_out_position() {check_pos(); return this->control_out_position;}
80 // define new position and value, re-adjust ctrl point, notify neighbours
81 void adjust_to_new_coordinates(int64_t position, float value);
82 // text name for curve mode
83 static const char *curve_name(int curve_mode);
86 void adjust_curves(); // recalc. ctrk in and out points, if automatic curve mode (SMOOTH or LINEAR)
87 void adjust_ctrl_positions(FloatAuto *p=0, FloatAuto *n=0); // recalc. x location of ctrl points, notify neighbours
88 void set_ctrl_positions(FloatAuto*, FloatAuto*);
89 void calculate_slope(FloatAuto* a1, FloatAuto* a2, float& dvdx, float& dx);
90 void check_pos() { if(position != pos_valid) adjust_ctrl_positions(); }
91 void curve_dirty() { pos_valid=-1; }
92 void handle_automatic_curve_after_copy();
94 // Control values are relative to value
95 float value, control_in_value, control_out_value;
96 // X control positions relative to value position for drawing.
97 // In native units of the track.
98 int64_t control_in_position, control_out_position;
100 int64_t pos_valid; // 'dirty flag' to recalculate ctrl point positions on demand
101 int value_to_str(char *string, float value);