void ContinuousPathApp::drawCurves(cairo::Context &ctx, Path2d path, float thickness, Color col)
{
ctx.setLineWidth(thickness);
ctx.setSource(col);
ctx.newSubPath();
int pointIndex = 0;
for (int i=0; i<path.getNumSegments(); i++) {
int segType = path.getSegmentType(i);
// change jumpIndex depending on the type of segment
switch(segType){
case Path2d::CUBICTO:
if(i==0) ctx.moveTo(path.getPoint(pointIndex));
// do a curve to using the next 2 points as the curves and the 3rd as the end point
ctx.curveTo(path.getPoint(pointIndex+1), path.getPoint(pointIndex+2), path.getPoint(pointIndex+3));
pointIndex += 3;
break;
case Path2d::MOVETO:
// don't do anything with this point
ctx.moveTo(path.getPoint(pointIndex));
pointIndex += 0;
break;
default:
pointIndex += 1;
break;
}
}
ctx.stroke();
}
void PathSimplificationApp::drawLine(cairo::Context &ctx, Vec2f const &pt1, Vec2f const &pt2, float thickness, Color col)
{
ctx.setLineWidth(thickness);
ctx.setSource(col);
ctx.newSubPath();
ctx.moveTo(pt1.x, pt1.y);
ctx.lineTo(pt2.x, pt2.y);
ctx.closePath();
ctx.stroke();
}
void makePath( cairo::Context &ctx ) const
{
for( int petal = 0; petal < mNumPetals; ++petal ) {
ctx.newSubPath();
float petalAngle = ( petal / (float)mNumPetals ) * 2 * M_PI;
Vec2f outsideCircleCenter = mLoc + Vec2f::xAxis() * cos( petalAngle ) * mRadius + Vec2f::yAxis() * sin( petalAngle ) * mRadius;
Vec2f insideCircleCenter = mLoc + Vec2f::xAxis() * cos( petalAngle ) * mPetalInsideRadius + Vec2f::yAxis() * sin( petalAngle ) * mPetalInsideRadius;
ctx.arc( outsideCircleCenter, mPetalOutsideRadius, petalAngle + M_PI / 2 + M_PI, petalAngle + M_PI / 2 );
ctx.arc( insideCircleCenter, mPetalInsideRadius, petalAngle + M_PI / 2, petalAngle + M_PI / 2 + M_PI );
ctx.closePath();
}
}
void ContinuousPathApp::drawCircle(cairo::Context &ctx, Vec2f const &pt, double diameter, Color col, bool outline)
{
ctx.setLineWidth(1);
ctx.setSource( col );
ctx.newSubPath();
ctx.circle( pt.x, pt.y, diameter );
ctx.closePath();
if(outline){
ctx.stroke();
}else{
ctx.fill();
}
}