/*-----------------------------------------------------------------------------
Name : btgConvertStar
Description : do appropriate things to spherically unproject a star
Inputs : out - target output btgTransVert
nVert - index of 2D btg star
Outputs : out will contain the appropriate thing
Return :
----------------------------------------------------------------------------*/
void btgConvertStar(btgTransStar* out, udword nVert)
{
BtgBackground::btgStar* in;
real64 x, y;
real64 halfWidth, halfHeight;
in = btgStars + nVert;
halfWidth = (real64)in->width / 2.0;
halfHeight = (real64)in->height / 2.0;
btgConvertAVert((math::Vec3f *)&out->mid, in->x, in->y);
x = in->x - halfWidth;
y = in->y - halfHeight;
btgConvertAVert((math::Vec3f *)&out->ul, x, y);
x = in->x - halfWidth;
y = in->y + halfHeight;
btgConvertAVert((math::Vec3f *)&out->ll, x, y);
x = in->x + halfWidth;
y = in->y + halfHeight;
btgConvertAVert((math::Vec3f *)&out->lr, x, y);
x = in->x + halfWidth;
y = in->y - halfHeight;
btgConvertAVert((math::Vec3f *)&out->ur, x, y);
}
/*-----------------------------------------------------------------------------
Name : btgConvertVert
Description : do appropriate things to spherically unproject a vert
Inputs : out - target output btgTransVert
nVert - index of 2D btg vertex
Outputs : out will contain the appropriate thing
Return :
----------------------------------------------------------------------------*/
void btgConvertVert(btgTransVertex* out, udword nVert)
{
BtgBackground::btgVertex* in;
in = btgVerts + nVert;
btgConvertAVert(&out->position, in->x, in->y);
out->red = (GLubyte)((in->red * in->alpha) >> 8);
out->green = (GLubyte)((in->green * in->alpha) >> 8);
out->blue = (GLubyte)((in->blue * in->alpha) >> 8);
out->alpha = 255;
}
/*-----------------------------------------------------------------------------
Name : btgConvertStar
Description : do appropriate things to spherically unproject a star
Inputs : out - target output btgTransVert
nVert - index of 2D btg star
Outputs : out will contain the appropriate thing
Return :
----------------------------------------------------------------------------*/
void btgConvertStar(btgTransStar* out, udword nVert)
{
btgStar* in;
real32 x, y;
real32 halfWidth, halfHeight;
in = btgStars + nVert;
halfWidth = (real32)in->width / 2.0f;
halfHeight = (real32)in->height / 2.0f;
halfWidth *= 640.0f / MAIN_WindowWidth;
halfHeight *= 480.0f / MAIN_WindowHeight;
x = in->x - halfWidth;
y = in->y + halfHeight;
btgConvertAVert(&out->ll, x, y);
out->llt[0] = 0.0f;
out->llt[1] = 0.0f;
x = in->x + halfWidth;
y = in->y + halfHeight;
btgConvertAVert(&out->lr, x, y);
out->lrt[0] = 1.0f;
out->lrt[1] = 0.0f;
x = in->x - halfWidth;
y = in->y - halfHeight;
btgConvertAVert(&out->ul, x, y);
out->ult[0] = 0.0f;
out->ult[1] = 1.0f;
x = in->x + halfWidth;
y = in->y - halfHeight;
btgConvertAVert(&out->ur, x, y);
out->urt[0] = 1.0f;
out->urt[1] = 1.0f;
}
