bool getInverted(TimeValue time) const
{
KnobBoolPtr knob = invert.lock();
if (!knob) {
return false;
}
return knob->getValueAtTime(time);
}
bool getEnabled(TimeValue time,
int index) const
{
KnobBoolPtr knob = enable[index].lock();
if (!knob) {
return true;
}
return knob->getValueAtTime(time);
}
bool
RotoShapeRenderNodePrivate::renderStroke_generic(RenderStrokeDataPtr userData,
PFNRenderStrokeBeginRender beginCallback,
PFNRenderStrokeRenderDot renderDotCallback,
PFNRenderStrokeEndRender endCallback,
const std::list<std::list<std::pair<Point, double> > >& strokes,
const double distToNextIn,
const Point& lastCenterPointIn,
const RotoDrawableItemPtr& stroke,
bool doBuildup,
double opacity,
TimeValue time,
ViewIdx /*view*/,
const RenderScale& scale,
double* distToNextOut,
Point* lastCenterPoint)
{
assert(distToNextOut && lastCenterPoint);
*distToNextOut = 0;
double brushSize, brushSizePixelX, brushSizePixelY, brushSpacing, brushHardness, writeOnStart, writeOnEnd;
bool pressureAffectsOpacity, pressureAffectsHardness, pressureAffectsSize;
{
KnobDoublePtr brushSizeKnob = stroke->getBrushSizeKnob();
brushSize = brushSizeKnob->getValueAtTime(time);
KnobDoublePtr brushSpacingKnob = stroke->getBrushSpacingKnob();
brushSpacing = brushSpacingKnob->getValueAtTime(time);
if (brushSpacing == 0.) {
return false;
}
brushSpacing = std::max(brushSpacing, 0.05);
KnobDoublePtr brushHardnessKnob = stroke->getBrushHardnessKnob();
brushHardness = brushHardnessKnob->getValueAtTime(time);
KnobDoublePtr visiblePortionKnob = stroke->getBrushVisiblePortionKnob();
writeOnStart = visiblePortionKnob->getValueAtTime(time);
writeOnEnd = visiblePortionKnob->getValueAtTime(time, DimIdx(1));
if ( (writeOnEnd - writeOnStart) <= 0. ) {
return false;
}
// This function is also used for opened bezier which do not have pressure.
RotoStrokeItemPtr isStroke = toRotoStrokeItem(stroke);
if (!isStroke) {
pressureAffectsOpacity = false;
pressureAffectsSize = false;
pressureAffectsHardness = false;
} else {
KnobBoolPtr pressureOpacityKnob = isStroke->getPressureOpacityKnob();
KnobBoolPtr pressureSizeKnob = isStroke->getPressureSizeKnob();
KnobBoolPtr pressureHardnessKnob = isStroke->getPressureHardnessKnob();
pressureAffectsOpacity = pressureOpacityKnob->getValueAtTime(time);
pressureAffectsSize = pressureSizeKnob->getValueAtTime(time);
pressureAffectsHardness = pressureHardnessKnob->getValueAtTime(time);
}
brushSizePixelX = brushSize;
brushSizePixelY = brushSizePixelX;
brushSizePixelX = std::max( 1., brushSizePixelX * scale.x);
brushSizePixelY = std::max( 1., brushSizePixelY * scale.y);
}
double distToNext = distToNextIn;
bool hasRenderedDot = false;
beginCallback(userData, brushSizePixelX, brushSizePixelY, brushSpacing, brushHardness, pressureAffectsOpacity, pressureAffectsHardness, pressureAffectsSize, doBuildup, opacity);
*lastCenterPoint = lastCenterPointIn;
Point prevCenter = lastCenterPointIn;
for (std::list<std::list<std::pair<Point, double> > >::const_iterator strokeIt = strokes.begin(); strokeIt != strokes.end(); ++strokeIt) {
int firstPoint = (int)std::floor( (strokeIt->size() * writeOnStart) );
int endPoint = (int)std::ceil( (strokeIt->size() * writeOnEnd) );
assert( firstPoint >= 0 && firstPoint < (int)strokeIt->size() && endPoint > firstPoint && endPoint <= (int)strokeIt->size() );
///The visible portion of the paint's stroke with points adjusted to pixel coordinates
std::list<std::pair<Point, double> > visiblePortion;
std::list<std::pair<Point, double> >::const_iterator startingIt = strokeIt->begin();
std::list<std::pair<Point, double> >::const_iterator endingIt = strokeIt->begin();
std::advance(startingIt, firstPoint);
std::advance(endingIt, endPoint);
for (std::list<std::pair<Point, double> >::const_iterator it = startingIt; it != endingIt; ++it) {
visiblePortion.push_back(*it);
}
if ( visiblePortion.empty() ) {
continue;
}
std::list<std::pair<Point, double> >::iterator it = visiblePortion.begin();
if (visiblePortion.size() == 1) {
double spacing;
*lastCenterPoint = it->first;
renderDotCallback(userData, prevCenter, *lastCenterPoint, it->second, &spacing);
distToNext += spacing;
continue;
}
//prevCenter = it->first;
std::list<std::pair<Point, double> >::iterator next = it;
++next;
while ( next != visiblePortion.end() ) {
//Render for each point a dot. Spacing is a percentage of brushSize:
//Spacing at 1 means no dot is overlapping another (so the spacing is in fact brushSize)
//Spacing at 0 we do not render the stroke
double dx = next->first.x - it->first.x;
double dy = next->first.y - it->first.y;
// This is the distance between the current and next discretized points
// Since the distance between each points may vary, we uniformly position a dot along the segments
double dist = std::sqrt(dx * dx + dy * dy);
// while the next point can be drawn on this segment, draw a point and advance
while (distToNext <= dist) {
double a = dist == 0. ? 0. : distToNext / dist;
lastCenterPoint->x = it->first.x * (1 - a) + next->first.x * a;
lastCenterPoint->y = it->first.y * (1 - a) + next->first.y * a;
double pressure = it->second * (1 - a) + next->second * a;
// draw the dot
double spacing;
bool rendered = renderDotCallback(userData, prevCenter, *lastCenterPoint, pressure, &spacing);
hasRenderedDot |= rendered;
prevCenter = *lastCenterPoint;
distToNext += spacing;
/*if (rendered) {
} else {
break;
}*/
}
// go to the next segment
distToNext -= dist;
++next;
++it;
}
}
endCallback(userData);
*distToNextOut = distToNext;
return hasRenderedDot;
}