//desired: h in [0,360), s and v in [0,1] except if s = 0 then h = undefined
void ShiftPalette( unsigned char Palette[769], double DH, double DS, double DV, double DsH, double DsS, double DsV )
{
double r, g, b, h, s, v;
int i;
for (i = 192; i < 224; i++) {
r = ( (double) .003921568627 )*Palette[i*3];
g = ( (double) .003921568627 )*Palette[i*3+1];
b = ( (double) .003921568627 )*Palette[i*3+2];
RGB_To_HSV( r, g, b, &h, &s, &v );
h += DH;
s += DS;
v += DV;
if (h >= 360)
h -= 360;
if (h < 0)
h += 360;
if (s > 1)
s -= 1;
if (s < 0)
s += 1;
if (s == 0)
s += .01;
if (v > 1)
v -= 1;
if (v < 0)
v += 1;
HSV_To_RGB( &r, &g, &b, h, s, v );
Palette[i*3] = (unsigned char) (r*255);
Palette[i*3+1] = (unsigned char) (g*255);
Palette[i*3+2] = (unsigned char) (b*255);
}
for (i = 224; i < 256; i++) {
r = ( (double) .003921568627 )*Palette[i*3];
g = ( (double) .003921568627 )*Palette[i*3+1];
b = ( (double) .003921568627 )*Palette[i*3+2];
RGB_To_HSV( r, g, b, &h, &s, &v );
h += DsH;
s += DsS;
v += DsV;
if (h >= 360)
h -= 360;
if (h < 0)
h += 360;
if (s > 1)
s -= 1;
if (s < 0)
s += 1;
if (s == 0)
s += .01;
if (v > 1)
v -= 1;
if (v < 0)
v += 1;
HSV_To_RGB( &r, &g, &b, h, s, v );
Palette[i*3] = (unsigned char) (r*255);
Palette[i*3+1] = (unsigned char) (g*255);
Palette[i*3+2] = (unsigned char) (b*255);
}
}
//## begin module%40E266F20126.epilog preserve=yes
void COpenGL::DrawColorBar()
{
//glMatrixMode(GL_PROJECTION);
//glLoadIdentity();
//gluOrtho2D(-1, 1, -1, 1);
glLoadIdentity();
glPushMatrix();
glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
//glNormal3f(0,0,1);
int index = 0;
float sum = 120;
float fInterval = (float)(1.6) / sum;
for (int h=0; h<240; h+=2)
{
//glColor3f(1, 0, 0);
float r = 0;
float g = 0;
float b = 0;
HSV_To_RGB(r, g, b, (float)(h), (float)(1.0), (float)(1.0));
glColor3f(r, g, b);
glBegin(GL_POLYGON);
glVertex3f((float)(-1.2), (float)(0.9) - index*fInterval, (float)(-0.5));
glVertex3f((float)(-1.1), (float)(0.9) - index*fInterval, (float)(-0.5));
glVertex3f((float)(-1.1), (float)(0.9) - (index+1)*fInterval, (float)-0.5);
glVertex3f((float)(-1.2), (float)(0.9) - (index+1)*fInterval, (float)-0.5);
glEnd();
index++;
}
glPopMatrix();
switch(m_nDispType )
{
case 0:
glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
break;
case 1:
glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
break;
case 2:
glPolygonMode(GL_FRONT_AND_BACK,GL_POINT);
break;
default:
break;
}
}
