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gradient.cpp
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gradient.cpp
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#include "r-tech1/graphics/gradient.h"
#include "r-tech1/funcs.h"
#include "r-tech1/token.h"
namespace Effects{
Gradient::Gradient():
colors(NULL),
size(1),
index(0){
colors = new Graphics::Color[size];
colors[0] = Graphics::makeColor(255, 255, 255);
}
Gradient::Gradient(Graphics::Color singleColor):
colors(NULL),
size(1),
index(0){
colors = new Graphics::Color[size];
colors[0] = singleColor;
}
/* this class does virtually no error checking. great job */
Gradient::Gradient(int size, Graphics::Color startColor, Graphics::Color endColor):
colors(0),
size(size),
index(0){
size = Util::clamp(size, 2, 10000);
colors = new Graphics::Color[size];
Graphics::blend_palette(colors, size / 2, startColor, endColor);
Graphics::blend_palette(colors + size / 2, size / 2, endColor, startColor);
}
Gradient::Gradient(const Token * token):
colors(NULL),
size(10),
index(0){
int lowRed = 0, lowGreen = 0, lowBlue = 0;
int highRed = 255, highGreen = 255, highBlue = 255;
token->match("_/low", lowRed, lowGreen, lowBlue);
token->match("_/high", highRed, highGreen, highBlue);
token->match("_/distance", size);
token->match("_/size", size);
size = Util::clamp(size, 2, 10000);
Graphics::Color startColor = Graphics::makeColor(lowRed, lowGreen, lowBlue);
Graphics::Color endColor = Graphics::makeColor(highRed, highGreen, highBlue);
colors = new Graphics::Color[size];
Graphics::blend_palette(colors, size / 2, startColor, endColor);
Graphics::blend_palette(colors + size / 2, size / 2, endColor, startColor);
}
Gradient::Gradient(const Gradient & copy):
colors(NULL),
size(copy.size),
index(copy.index){
colors = new Graphics::Color[size];
for (unsigned int i = 0; i < size; i++){
colors[i] = copy.colors[i];
}
}
Gradient & Gradient::operator=(const Gradient & copy){
delete[] colors;
size = copy.size;
index = copy.index;
colors = new Graphics::Color[size];
for (unsigned int i = 0; i < size; i++){
colors[i] = copy.colors[i];
}
return *this;
}
void Gradient::forward(){
index = (index + 1) % size;
}
void Gradient::backward(){
/* This goofy logic is used because index is an unsigned int and its a bad idea
* to subtract 1 from an unsigned int whose value is 0.
*/
if (index == 0){
index = size - 1;
} else {
index -= 1;
}
}
void Gradient::update(){
forward();
}
void Gradient::reset(){
index = 0;
}
Graphics::Color Gradient::current() const {
return colors[index];
}
Graphics::Color Gradient::current(int offset) const {
return colors[(index + offset + size) % size];
}
Gradient::~Gradient(){
delete[] colors;
}
}

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