115 lines
3.5 KiB
C++
115 lines
3.5 KiB
C++
#include "shakeeffect.h"
|
|
|
|
#include <QGridLayout>
|
|
#include <QLabel>
|
|
#include <QtMath>
|
|
#include <QOpenGLFunctions>
|
|
#include <QDebug>
|
|
|
|
#include "ui/labelslider.h"
|
|
#include "ui/collapsiblewidget.h"
|
|
#include "project/clip.h"
|
|
#include "project/sequence.h"
|
|
#include "panels/timeline.h"
|
|
|
|
ShakeEffect::ShakeEffect(Clip *c) : Effect(c, EFFECT_TYPE_VIDEO, VIDEO_SHAKE_EFFECT), inside(false) {
|
|
enable_opengl = true;
|
|
|
|
EffectRow* intensity_row = add_row("Intensity:");
|
|
intensity_val = intensity_row->add_field(EFFECT_FIELD_DOUBLE);
|
|
intensity_val->set_double_minimum_value(0);
|
|
|
|
EffectRow* rotation_row = add_row("Rotation:");
|
|
rotation_val = rotation_row->add_field(EFFECT_FIELD_DOUBLE);
|
|
rotation_val->set_double_minimum_value(0);
|
|
|
|
EffectRow* frequency_row = add_row("Frequency:");
|
|
frequency_val = frequency_row->add_field(EFFECT_FIELD_DOUBLE);
|
|
frequency_val->set_double_minimum_value(0);
|
|
|
|
// set defaults
|
|
intensity_val->set_double_default_value(50);
|
|
rotation_val->set_double_default_value(0);
|
|
frequency_val->set_double_default_value(10);
|
|
|
|
refresh();
|
|
|
|
connect(intensity_val, SIGNAL(changed()), this, SLOT(field_changed()));
|
|
connect(rotation_val, SIGNAL(changed()), this, SLOT(field_changed()));
|
|
connect(frequency_val, SIGNAL(changed()), this, SLOT(field_changed()));
|
|
}
|
|
|
|
void ShakeEffect::refresh() {
|
|
if (parent_clip->sequence != NULL) {
|
|
shake_limit = qRound(parent_clip->sequence->frame_rate / frequency_val->get_double_value(-1));
|
|
shake_progress = shake_limit;
|
|
next_x = 0;
|
|
next_y = 0;
|
|
next_rot = 0;
|
|
}
|
|
}
|
|
|
|
Effect* ShakeEffect::copy(Clip* c) {
|
|
ShakeEffect* e = new ShakeEffect(c);
|
|
copy_field_keyframes(e);
|
|
return e;
|
|
}
|
|
|
|
void ShakeEffect::process_gl(long p, QOpenGLShaderProgram&, int*, int*) {
|
|
if (shake_progress > shake_limit) {
|
|
double ival = intensity_val->get_double_value(p);
|
|
if ((int)ival > 0) {
|
|
prev_x = next_x;
|
|
prev_y = next_y;
|
|
next_x = (qrand() % (int) (ival * 2)) - ival;
|
|
next_y = (qrand() % (int) (ival * 2)) - ival;
|
|
|
|
// find perpendicular slope that passes through (mid_x, mid_y)
|
|
int mid_x = (prev_x + next_x) / 2;
|
|
int mid_y = (prev_y + next_y) / 2;
|
|
int slope_num = (next_y-prev_y);
|
|
if (slope_num > 0) {
|
|
int slope_den = (next_x-prev_x);
|
|
int add = (next_x-prev_x)/4;
|
|
if (inside) add = -add;
|
|
inside = !inside;
|
|
perp_x = mid_x + add;
|
|
perp_y = (-(slope_den / slope_num)) * perp_x + mid_y;
|
|
} else {
|
|
perp_x = mid_x;
|
|
perp_y = mid_y;
|
|
}
|
|
} else {
|
|
prev_x = 0;
|
|
prev_y = 0;
|
|
next_x = 0;
|
|
next_y = 0;
|
|
offset_x = 0;
|
|
offset_y = 0;
|
|
}
|
|
double rot_val = rotation_val->get_double_value(p);
|
|
if ((int)rot_val > 0) {
|
|
prev_rot = next_rot;
|
|
next_rot = (qrand() % (int) (rot_val * 2)) - rot_val;
|
|
} else {
|
|
prev_rot = 0;
|
|
next_rot = 0;
|
|
offset_rot = 0;
|
|
}
|
|
shake_progress = 0;
|
|
}
|
|
|
|
t = (double) shake_progress / (double) shake_limit;
|
|
|
|
double oneminust = 1 - t;
|
|
|
|
offset_x = (qPow(oneminust, 2)*prev_x) + (2*oneminust*t*perp_x) + (qPow(t, 2) * next_x);
|
|
offset_y = (qPow(oneminust, 2)*prev_y) + (2*oneminust*t*perp_y) + (qPow(t, 2) * next_y);
|
|
|
|
offset_rot = lerp(prev_rot, next_rot, t);
|
|
|
|
glTranslatef(offset_x, offset_y, 0);
|
|
glRotatef(offset_rot, 0, 0, 1);
|
|
shake_progress++;
|
|
}
|