The State and Structure of the Album
| Kick-off the state machine.
The "state" is a tuple with two number behaviors, one each for the left and
right page indexes, a geometry behavior for the center page,
and a sound behavior for the audio effects. |
TupleBvr state = frontState();
| extract the individual behaviors from the tuple |
leftInd = (NumberBvr) state.nth(0);
rightInd = (NumberBvr) state.nth(1);
centerPage = (GeometryBvr) state.nth(2);
snd = (SoundBvr) state.nth(3);
| extract the left and right pages and labels from their indices |
GeometryBvr leftPage = ((GeometryBvr)picFrames.nth(leftInd)).transform(leftTrans);
GeometryBvr rightPage = ((GeometryBvr)picFrames.nth(rightInd)).transform(rightTrans);
StringBvr lPageLabel = (StringBvr)labels.nth(leftInd);
StringBvr rPageLabel = (StringBvr)labels.nth(rightInd);
| now construct the album from the pages and the pivot line |
ImageBvr album = overlay(renderPage(pivotLine),
overlay(renderPage(centerPage),
overlay(renderPage(rightPage),
renderPage(leftPage))));
| Here, construct the two lables and position them under the album.
Position them relative to the viewport to be at 12.5% from the bottom. |
ImageBvr lLabel = renderStr(lPageLabel, labelColor,
neg(div(_halfWidth,toBvr(2))),
mul(toBvr(-0.75),_halfHeight));
ImageBvr rLabel = renderStr(rPageLabel, labelColor,
div(_halfWidth,toBvr(2)),
mul(toBvr(-0.75),_halfHeight));
| The model is the album with the lables and a blue background. |
ImageBvr model = overlay(album,
overlay(lLabel,
overlay(rLabel, solidColorImage(blue))));
setSound(snd);
setImage(model);
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