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PolygonBucket: dont test bbox visibility with overzoom > 2

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- workaround: seems there can be some overflow in GLMatrix.prj2d()
This commit is contained in:
Hannes Janetzek 2014-11-04 19:20:24 +01:00
parent 3178787954
commit c3ac8a412c
1 changed files with 28 additions and 25 deletions
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53
vtm/src/org/oscim/renderer/bucket/PolygonBucket.java
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@ -337,38 +337,41 @@ public final class PolygonBucket extends RenderBucket {
if (area.fadeScale > 0 && area.fadeScale > zoom)
continue;
/* project bbox of polygon to screen */
v.mvp.prj2D(pb.bbox, 0, box, 0, 4);
if (div > 0.5) {
/* project bbox of polygon to screen */
v.mvp.prj2D(pb.bbox, 0, box, 0, 4);
int out = 0;
for (int i = 0; i < 8; i += 2) {
int o = mScreenClip.outcode(box[i], box[i + 1]);
int out = 0;
for (int i = 0; i < 8; i += 2) {
int o = mScreenClip.outcode(box[i], box[i + 1]);
if (o == 0) {
/* at least one corner is inside */
if (o == 0) {
/* at least one corner is inside */
out = 0;
break;
}
out |= o;
}
/* Check if any polygon-bucket edge intersects the screen.
* Also check the very unlikely case where the view might
* be
* completly contained within box */
if ((out != 0) && (out != 0xF)) {
mScreenClip.clipStart(box[6], box[7]);
out = 0;
break;
}
out |= o;
}
for (int i = 0; i < 8 && out == 0; i += 2)
out = mScreenClip.clipNext(box[i], box[i + 1]);
/* Check if any polygon-bucket edge intersects the screen.
* Also check the very unlikely case where the view might be
* completly contained within box */
if ((out != 0) && (out != 0xF)) {
mScreenClip.clipStart(box[0], box[1]);
if (out == 0) {
//log.debug("out {}\n {}\n {}", out, Arrays.toString(pb.bbox), Arrays.toString(box));
if (mScreenClip.clipNext(box[2], box[3]) == 0 &&
mScreenClip.clipNext(box[4], box[5]) == 0 &&
mScreenClip.clipNext(box[6], box[7]) == 0 &&
mScreenClip.clipNext(box[0], box[1]) == 0) {
// log.debug("outside {} {} {}", out,
// Arrays.toString(box),
// Arrays.toString(pb.bbox));
continue;
// log.debug("outside {} {} {}", out,
// Arrays.toString(box),
// Arrays.toString(pb.bbox));
continue;
}
}
}
if (mClear) {
clearStencilRegion();
/* op for stencil method polygon drawing */