// doc in super
void
SoOrthoSlice::computeBBox(SoAction * action, SbBox3f & box, SbVec3f & center)
{
SoState * state = action->getState();
if (!PRIVATE(this)->confirmValidInContext(state)) { return; }
const CvrVoxelBlockElement * vbelem = CvrVoxelBlockElement::getInstance(state);
if (vbelem == NULL) return;
SbBox3f vdbox = vbelem->getUnitDimensionsBox();
SbVec3f bmin, bmax;
vdbox.getBounds(bmin, bmax);
const SbVec3s & dimensions = vbelem->getVoxelCubeDimensions();
const int axisidx = (int)axis.getValue();
const int slice = this->sliceNumber.getValue();
const float depth = (float)fabs(bmax[axisidx] - bmin[axisidx]);
bmin[axisidx] = bmax[axisidx] =
(bmin[axisidx] + (depth / dimensions[axisidx]) * slice);
vdbox.setBounds(bmin, bmax);
box.extendBy(vdbox);
center = vdbox.getCenter();
}
// Render 3D box.
//
// FIXME: should make bbox debug rendering part of SoSeparator /
// SoGroup. 20030305 mortene.
void
SoOrthoSliceP::renderBox(SoGLRenderAction * action, SbBox3f box)
{
SbVec3f bmin, bmax;
box.getBounds(bmin, bmax);
glPushAttrib(GL_ALL_ATTRIB_BITS);
glDisable(GL_TEXTURE_2D);
glDisable(GL_LIGHTING);
glColor4ub(0xff, 0xff, 0xff, 0xff);
glLineStipple(1, 0xffff);
glLineWidth(2);
glBegin(GL_LINES);
glVertex3f(bmin[0], bmin[1], bmin[2]);
glVertex3f(bmin[0], bmin[1], bmax[2]);
glVertex3f(bmax[0], bmin[1], bmin[2]);
glVertex3f(bmax[0], bmin[1], bmax[2]);
glVertex3f(bmax[0], bmax[1], bmin[2]);
glVertex3f(bmax[0], bmax[1], bmax[2]);
glVertex3f(bmin[0], bmax[1], bmin[2]);
glVertex3f(bmin[0], bmax[1], bmax[2]);
glVertex3f(bmin[0], bmin[1], bmin[2]);
glVertex3f(bmax[0], bmin[1], bmin[2]);
glVertex3f(bmin[0], bmin[1], bmax[2]);
glVertex3f(bmax[0], bmin[1], bmax[2]);
glVertex3f(bmin[0], bmax[1], bmax[2]);
glVertex3f(bmax[0], bmax[1], bmax[2]);
glVertex3f(bmin[0], bmax[1], bmin[2]);
glVertex3f(bmax[0], bmax[1], bmin[2]);
glVertex3f(bmin[0], bmin[1], bmin[2]);
glVertex3f(bmin[0], bmax[1], bmin[2]);
glVertex3f(bmin[0], bmin[1], bmax[2]);
glVertex3f(bmin[0], bmax[1], bmax[2]);
glVertex3f(bmax[0], bmin[1], bmax[2]);
glVertex3f(bmax[0], bmax[1], bmax[2]);
glVertex3f(bmax[0], bmin[1], bmin[2]);
glVertex3f(bmax[0], bmax[1], bmin[2]);
glEnd();
glPopAttrib();
}
void IvDragger::_GetBounds(SoSeparator *subtree, AABB& ab)
{
SoGetBoundingBoxAction bbox(_viewer.lock()->GetViewer()->getViewportRegion());
bbox.apply(subtree);
SbBox3f box = bbox.getBoundingBox();
RaveVector<float> vmin, vmax;
box.getBounds(vmin.x,vmin.y,vmin.z,vmax.x,vmax.y,vmax.z);
ab.pos = 0.5*(vmin+vmax);
ab.extents = 0.5*(vmax-vmin);
}
/**
* Renders the label.
*/
void SoTextLabel::GLRender(SoGLRenderAction *action)
{
if (!this->shouldGLRender(action)) return;
// only draw text without background
if (!this->background.getValue()) {
inherited::GLRender(action);
return;
}
SoState * state = action->getState();
state->push();
SoLazyElement::setLightModel(state, SoLazyElement::BASE_COLOR);
SbBox3f box;
SbVec3f center;
this->computeBBox(action, box, center);
if (!SoCullElement::cullTest(state, box, TRUE)) {
SoMaterialBundle mb(action);
mb.sendFirst();
const SbMatrix & mat = SoModelMatrixElement::get(state);
//const SbViewVolume & vv = SoViewVolumeElement::get(state);
const SbMatrix & projmatrix = (mat * SoViewingMatrixElement::get(state) *
SoProjectionMatrixElement::get(state));
const SbViewportRegion & vp = SoViewportRegionElement::get(state);
SbVec2s vpsize = vp.getViewportSizePixels();
// font stuff
//float space = this->spacing.getValue();
//float fontsize = SoFontSizeElement::get(state);
SbName fontname = SoFontNameElement::get(state);
int lines = this->string.getNum();
// get left bottom corner of the label
SbVec3f nilpoint(0.0f, 0.0f, 0.0f);
projmatrix.multVecMatrix(nilpoint, nilpoint);
nilpoint[0] = (nilpoint[0] + 1.0f) * 0.5f * vpsize[0];
nilpoint[1] = (nilpoint[1] + 1.0f) * 0.5f * vpsize[1];
#if 1
// Unfortunately, the size of the label is stored in the pimpl class of
// SoText2 which cannot be accessed directly. However, there is a trick
// to get the required information: set model, viewing and projection
// matrix to the identity matrix and also view volume to some default
// values. SoText2::computeBBox() then calls SoText2P::getQuad which
// returns the sizes in form of the bounding box. These values can be
// reverse-engineered to get width and height.
state->push();
SoModelMatrixElement::set(state,this,SbMatrix::identity());
SoViewingMatrixElement::set(state,this,SbMatrix::identity());
SoProjectionMatrixElement::set(state,this,SbMatrix::identity());
SbViewVolume vv;
vv.ortho(-1,1,-1,1,-1,1);
SoViewVolumeElement::set(state,this,vv);
SbBox3f box;
SbVec3f center;
this->computeBBox(action, box, center);
state->pop();
float xmin,ymin,zmin,xmax,ymax,zmax;
box.getBounds(xmin,ymin,zmin,xmax,ymax,zmax);
SbVec3f v0(xmin,ymax,zmax);
SbVec3f v1(xmax,ymax,zmax);
SbVec3f v2(xmax,ymin,zmax);
SbVec3f v3(xmin,ymin,zmax);
vv.projectToScreen(v0,v0);
vv.projectToScreen(v1,v1);
vv.projectToScreen(v2,v2);
vv.projectToScreen(v3,v3);
float width,height;
width = (v1[0]-v0[0])*vpsize[0];
height = (v1[1]-v3[1])*vpsize[1];
switch (this->justification.getValue()) {
case SoText2::RIGHT:
nilpoint[0] -= width;
break;
case SoText2::CENTER:
nilpoint[0] -= 0.5f*width;
break;
default:
break;
}
if (lines > 1) {
nilpoint[1] -= (float(lines-1)/(float)lines*height);
}
#else
// Unfortunately, the required size (in pixels) is stored in a non-accessible way
// in the subclass SoText2. Thus, we try to get a satisfactory solution with Qt
// methods.
// The font name is of the form "family:style". If 'style' is given it can be
// 'Bold', 'Italic' or 'Bold Italic'.
QFont font;
QString fn = QString::fromAscii(fontname.getString());
int pos = fn.indexOf(QLatin1Char(':'));
if (pos > -1) {
if (fn.indexOf(QLatin1String("Bold"),pos,Qt::CaseInsensitive) > pos)
font.setBold(true);
if (fn.indexOf(QLatin1String("Italic"),pos,Qt::CaseInsensitive) > pos)
font.setItalic(true);
fn = fn.left(pos);
}
font.setFamily(fn);
font.setPixelSize((int)fontsize);
QFontMetrics fm(font);
float width = 0.0f;
float height = 0.75f*fontsize*lines + (lines-1)*space;//fm.height();
float hh=0;
for (int i = 0; i < lines; i++) {
SbString str = this->string[i];
float w = fm.width(QLatin1String(this->string[i].getString()));
width = std::max<float>(width, w);
hh = fm.height();
}
if (lines > 1) {
nilpoint[1] -= ((lines-1)*fontsize*0.75f+space);
}
#endif
SbVec3f toppoint = nilpoint;
toppoint[0] += width;
toppoint[1] += height;
// Set new state.
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0, vpsize[0], 0, vpsize[1], -1.0f, 1.0f);
glPixelStorei(GL_UNPACK_ALIGNMENT,1);
state->push();
// disable textures for all units
SoGLTextureEnabledElement::set(state, this, FALSE);
SoGLTexture3EnabledElement::set(state, this, FALSE);
glPushAttrib(GL_ENABLE_BIT | GL_PIXEL_MODE_BIT | GL_COLOR_BUFFER_BIT);
glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
// color and frame size
SbColor color = this->backgroundColor.getValue();
float fs = this->frameSize.getValue();
// draw background
glColor3f(color[0], color[1], color[2]);
glBegin(GL_QUADS);
glVertex3f(nilpoint[0]-fs,nilpoint[1]-fs,0.0f);
glVertex3f(toppoint[0]+fs,nilpoint[1]-fs,0.0f);
glVertex3f(toppoint[0]+fs,toppoint[1]+fs,0.0f);
glVertex3f(nilpoint[0]-fs,toppoint[1]+fs,0.0f);
glEnd();
// pop old state
glPopClientAttrib();
glPopAttrib();
state->pop();
glPixelStorei(GL_UNPACK_ALIGNMENT,4);
// Pop old GL matrix state.
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
state->pop();
inherited::GLRender(action);
}