void
RAS_FramingManager::
ComputeViewport(
const RAS_FrameSettings &settings,
const RAS_Rect &availableViewport,
RAS_Rect &viewport
){
RAS_FrameSettings::RAS_FrameType type = settings.FrameType();
const int winx = availableViewport.GetWidth();
const int winy = availableViewport.GetHeight();
const float design_width = float(settings.DesignAspectWidth());
const float design_height = float(settings.DesignAspectHeight());
float design_aspect_ratio = float(1);
if (design_height == float(0)) {
// well this is ill defined
// lets just scale the thing
type = RAS_FrameSettings::e_frame_scale;
} else {
design_aspect_ratio = design_width/design_height;
}
switch (type) {
case RAS_FrameSettings::e_frame_scale :
case RAS_FrameSettings::e_frame_extend:
{
viewport.SetLeft(availableViewport.GetLeft());
viewport.SetBottom(availableViewport.GetBottom());
viewport.SetRight(availableViewport.GetLeft() + int(winx));
viewport.SetTop(availableViewport.GetBottom() + int(winy));
break;
}
case RAS_FrameSettings::e_frame_bars:
{
ComputeBestFitViewRect(
availableViewport,
design_aspect_ratio,
viewport
);
break;
}
default :
break;
}
}
void
RAS_FramingManager::
ComputeOrtho(
const RAS_FrameSettings &settings,
const RAS_Rect &availableViewport,
const RAS_Rect &viewport,
const float scale,
const float camnear,
const float camfar,
RAS_FrameFrustum &frustum
)
{
RAS_FrameSettings::RAS_FrameType type = settings.FrameType();
const float design_width = float(settings.DesignAspectWidth());
const float design_height = float(settings.DesignAspectHeight());
float design_aspect_ratio = float(1);
if (design_height == float(0)) {
// well this is ill defined
// lets just scale the thing
type = RAS_FrameSettings::e_frame_scale;
} else {
design_aspect_ratio = design_width/design_height;
}
ComputeDefaultOrtho(
camnear,
camfar,
scale,
design_aspect_ratio,
frustum
);
switch (type) {
case RAS_FrameSettings::e_frame_extend:
{
RAS_Rect vt;
ComputeBestFitViewRect(
availableViewport,
design_aspect_ratio,
vt
);
// now scale the calculated frustum by the difference
// between vt and the viewport in each axis.
// These are always > 1
float x_scale = float(viewport.GetWidth())/float(vt.GetWidth());
float y_scale = float(viewport.GetHeight())/float(vt.GetHeight());
frustum.x1 *= x_scale;
frustum.x2 *= x_scale;
frustum.y1 *= y_scale;
frustum.y2 *= y_scale;
break;
}
case RAS_FrameSettings::e_frame_scale :
case RAS_FrameSettings::e_frame_bars:
default :
break;
}
}