wrenczes@gmail.com
90 lines
1.7 KiB
C++
90 lines
1.7 KiB
C++
/*
|
|
** Haaf's Game Engine 1.7
|
|
** Copyright (C) 2003-2007, Relish Games
|
|
** hge.relishgames.com
|
|
**
|
|
** hgeColor*** helper classes implementation
|
|
*/
|
|
|
|
|
|
#include "../../include/hge/hgecolor.h"
|
|
#include <math.h>
|
|
|
|
#ifndef min
|
|
#define min(x, y) ((x<y)?x:y)
|
|
#endif
|
|
|
|
#ifndef max
|
|
#define max(x, y) ((x>y)?x:y)
|
|
#endif
|
|
|
|
void hgeColorHSV::SetHWColor(DWORD col)
|
|
{
|
|
float r, g, b;
|
|
float minv, maxv, delta;
|
|
float del_R, del_G, del_B;
|
|
|
|
a = (col>>24) / 255.0f;
|
|
r = ((col>>16) & 0xFF) / 255.0f;
|
|
g = ((col>>8) & 0xFF) / 255.0f;
|
|
b = (col & 0xFF) / 255.0f;
|
|
|
|
minv = min(min(r, g), b);
|
|
maxv = max(max(r, g), b);
|
|
delta = maxv - minv;
|
|
|
|
v = maxv;
|
|
|
|
if (delta == 0)
|
|
{
|
|
h = 0;
|
|
s = 0;
|
|
}
|
|
else
|
|
{
|
|
s = delta / maxv;
|
|
del_R = (((maxv - r) / 6) + (delta / 2)) / delta;
|
|
del_G = (((maxv - g) / 6) + (delta / 2)) / delta;
|
|
del_B = (((maxv - b) / 6) + (delta / 2)) / delta;
|
|
|
|
if (r == maxv) {h = del_B - del_G;}
|
|
else if (g == maxv) {h = (1 / 3) + del_R - del_B;}
|
|
else if (b == maxv) {h = (2 / 3) + del_G - del_R;}
|
|
|
|
if (h < 0) h += 1;
|
|
if (h > 1) h -= 1;
|
|
}
|
|
}
|
|
|
|
DWORD hgeColorHSV::GetHWColor() const
|
|
{
|
|
float r, g, b;
|
|
float xh, i, p1, p2, p3;
|
|
|
|
if (s == 0)
|
|
{
|
|
r = v;
|
|
g = v;
|
|
b = v;
|
|
}
|
|
else
|
|
{
|
|
xh = h * 6;
|
|
if(xh == 6) xh=0;
|
|
i = floorf(xh);
|
|
p1 = v * (1 - s);
|
|
p2 = v * (1 - s * (xh - i));
|
|
p3 = v * (1 - s * (1 - (xh - i)));
|
|
|
|
if (i == 0) {r = v; g = p3; b = p1;}
|
|
else if (i == 1) {r = p2; g = v; b = p1;}
|
|
else if (i == 2) {r = p1; g = v; b = p3;}
|
|
else if (i == 3) {r = p1; g = p2; b = v; }
|
|
else if (i == 4) {r = p3; g = p1; b = v; }
|
|
else {r = v; g = p1; b = p2;}
|
|
}
|
|
|
|
return (ARGB((int)(a*255.0f), (int)(r*255.0f), (int)(g*255.0f), (int)(b*255.0f)));
|
|
}
|
|
|