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I totally misunderstood sgFrustum. This patch should put it right,

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and also adds an optimization to avoid traversing anything closer than
1000m.
This commit is contained in:
david 2002-07-26 01:52:51 +00:00
parent 27158525a9
commit 0178c65981
1 changed files with 11 additions and 21 deletions
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32
src/Main/main.cxx
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@ -648,33 +648,23 @@ void fgRenderFrame() {
ssgCullAndDraw( globals->get_scenery()->get_scene_graph() );
// This is a bit kludgy. Every 200 frames, do an extra
// traversal of the scene graph without drawing anything and
// the frustum set to a different 25% of the full range of
// view. This ensures that out-of-range random objects that
// are not in the current view frustum will still be freed
// properly.
// traversal of the scene graph without drawing anything, but
// with the field-of-view set to 360x360 degrees. This
// ensures that out-of-range random objects that are not in
// the current view frustum will still be freed properly.
static int counter = 0;
counter++;
if (counter % 200 == 0) {
if (counter == 200) {
sgFrustum f;
switch (counter) {
case 200:
f.setFrustum(SG_180, SG_ZERO, SG_90, SG_ZERO, 0, 500000000);
break;
case 400:
f.setFrustum(SG_ZERO, SG_180, SG_90, SG_ZERO, 0, 500000000);
break;
case 600:
f.setFrustum(SG_180, SG_ZERO, SG_ZERO, SG_90, 0, 500000000);
break;
case 800:
f.setFrustum(SG_ZERO, SG_180, SG_ZERO, SG_90, 0, 500000000);
counter = 0;
break;
}
f.setFOV(360, 360);
// No need to put the near plane too close;
// this way, at least the aircraft can be
// culled.
f.setNearFar(1000, 1000000);
sgMat4 m;
ssgGetModelviewMatrix(m);
globals->get_scenery()->get_scene_graph()->cull(&f, m, true);
counter = 0;
}
// change state for lighting here