125 lines
4.1 KiB
C++
125 lines
4.1 KiB
C++
/*************************************************************************/
|
|
/* color_ramp.h */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* http://www.godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
#ifndef SCENE_RESOURCES_COLOR_RAMP_H_
|
|
#define SCENE_RESOURCES_COLOR_RAMP_H_
|
|
|
|
#include "resource.h"
|
|
|
|
class ColorRamp: public Resource {
|
|
OBJ_TYPE( ColorRamp, Resource );
|
|
OBJ_SAVE_TYPE( ColorRamp );
|
|
|
|
public:
|
|
struct Point {
|
|
|
|
float offset;
|
|
Color color;
|
|
bool operator<(const Point& p_ponit) const {
|
|
return offset<p_ponit.offset;
|
|
}
|
|
};
|
|
|
|
private:
|
|
Vector<Point> points;
|
|
bool is_sorted;
|
|
|
|
protected:
|
|
static void _bind_methods();
|
|
|
|
public:
|
|
ColorRamp();
|
|
virtual ~ColorRamp();
|
|
|
|
void add_point(float p_offset, const Color& p_color);
|
|
void remove_point(int p_index);
|
|
|
|
void set_points(Vector<Point>& points);
|
|
Vector<Point>& get_points();
|
|
|
|
void set_offset(int pos, const float offset);
|
|
float get_offset(int pos) const;
|
|
|
|
void set_color(int pos, const Color& color);
|
|
Color get_color(int pos) const;
|
|
|
|
void set_offsets(const Vector<float>& offsets);
|
|
Vector<float> get_offsets() const;
|
|
|
|
void set_colors(const Vector<Color>& colors);
|
|
Vector<Color> get_colors() const;
|
|
|
|
_FORCE_INLINE_ Color get_color_at_offset(float p_offset) {
|
|
|
|
if (points.empty())
|
|
return Color(0,0,0,1);
|
|
|
|
if(!is_sorted)
|
|
{
|
|
points.sort();
|
|
is_sorted = true;
|
|
}
|
|
|
|
//binary search
|
|
int low = 0;
|
|
int high = points.size() -1;
|
|
int middle;
|
|
|
|
while( low <= high )
|
|
{
|
|
middle = ( low + high ) / 2;
|
|
Point& point = points[middle];
|
|
if( point.offset > p_offset ) {
|
|
high = middle - 1; //search low end of array
|
|
} else if ( point.offset < p_offset) {
|
|
low = middle + 1; //search high end of array
|
|
} else {
|
|
return point.color;
|
|
}
|
|
}
|
|
|
|
//return interpolated value
|
|
if (points[middle].offset>p_offset)
|
|
{
|
|
middle--;
|
|
}
|
|
int first=middle;
|
|
int second=middle+1;
|
|
if(second>=points.size())
|
|
return points[points.size()-1].color;
|
|
if(first<0)
|
|
return points[0].color;
|
|
Point& pointFirst = points[first];
|
|
Point& pointSecond = points[second];
|
|
return pointFirst.color.linear_interpolate(pointSecond.color, (p_offset-pointFirst.offset)/(pointSecond.offset - pointFirst.offset));
|
|
}
|
|
|
|
int get_points_count() const;
|
|
};
|
|
|
|
#endif /* SCENE_RESOURCES_COLOR_RAMP_H_ */
|