topical media & game development
student-ar-org-papervision3d-core-render-filter-QuadrantZFilter.ax
student-ar-org-papervision3d-core-render-filter-QuadrantZFilter.ax
[swf]
[flash]
flex
package org.papervision3d.core.render.filter
{
import flash.utils.*;
import org.papervision3d.cameras.Camera3D;
import org.papervision3d.core.clipping.draw.Clipping;
import org.papervision3d.core.render.command.RenderTriangle;
import org.papervision3d.core.render.command.RenderableListItem;
import org.papervision3d.core.render.data.QuadTree;
import org.papervision3d.scenes.Scene3D;
Corrects triangle z-sorting
public class @ax-student-ar-org-papervision3d-core-render-filter-QuadrantZFilter extends AbstractQuadrantFilter
{
private var maxdelay:int;
private var _focus:Number;
private var start:int;
private var check:int;
private var primitives:Array;
private var pri:RenderableListItem;
private var turn:int;
private var leftover:Array;
private var maxZ:Number;
private var minZ:Number;
private var maxdeltaZ:Number;
private var rivals:Array;
private var rival:RenderableListItem;
private var parts:Array;
private var part:RenderableListItem;
private var ZOrderDeeper:int = 1;
private var ZOrderIrrelevant:int = 0;
private var ZOrderHigher:int = -1;
private var ZOrderSame:int = 0;
private var q0x:Number;
private var q0y:Number;
private var q1x:Number;
private var q1y:Number;
private var q2x:Number;
private var q2y:Number;
private var r0x:Number;
private var r0y:Number;
private var r1x:Number;
private var r1y:Number;
private var ql01a:Number;
private var ql01b:Number;
private var ql01c:Number;
private var ql01s:Number;
private var ql01r0:Number;
private var ql01r1:Number;
private var ql12a:Number;
private var ql12b:Number;
private var ql12c:Number;
private var ql12s:Number;
private var ql12r0:Number;
private var ql12r1:Number;
private var ql20a:Number;
private var ql20b:Number;
private var ql20c:Number;
private var ql20s:Number;
private var ql20r0:Number;
private var ql20r1:Number;
private var rla:Number;
private var rlb:Number;
private var rlc:Number;
private var rlq0:Number;
private var rlq1:Number;
private var rlq2:Number;
private var q01r:Boolean;
private var q12r:Boolean;
private var q20r:Boolean;
private var q01rx:Number;
private var q01ry:Number;
private var q12rx:Number;
private var q12ry:Number;
private var q20rx:Number;
private var q20ry:Number;
private var count:int;
private var cx:Number;
private var cy:Number;
private var q01rd:Number;
private var q12rd:Number;
private var q20rd:Number;
private var w0x:Number;
private var w0y:Number;
private var w1x:Number;
private var w1y:Number;
private var w2x:Number;
private var w2y:Number;
private var ql01w0:Number;
private var ql01w1:Number;
private var ql01w2:Number;
private var ql12w0:Number;
private var ql12w1:Number;
private var ql12w2:Number;
private var ql20w0:Number;
private var ql20w1:Number;
private var ql20w2:Number;
private var wl01a:Number;
private var wl01b:Number;
private var wl01c:Number;
private var wl01s:Number;
private var wl01q0:Number;
private var wl01q1:Number;
private var wl01q2:Number;
private var wl12a:Number;
private var wl12b:Number;
private var wl12c:Number;
private var wl12s:Number;
private var wl12q0:Number;
private var wl12q1:Number;
private var wl12q2:Number;
private var wl20a:Number;
private var wl20b:Number;
private var wl20c:Number;
private var wl20s:Number;
private var wl20q0:Number;
private var wl20q1:Number;
private var wl20q2:Number;
private var q01w01:Boolean;
private var q12w01:Boolean;
private var q20w01:Boolean;
private var q01w12:Boolean;
private var q12w12:Boolean;
private var q20w12:Boolean;
private var q01w20:Boolean;
private var q12w20:Boolean;
private var q20w20:Boolean;
private var q01w01x:Number;
private var q01w01y:Number;
private var q12w01x:Number;
private var q12w01y:Number;
private var q20w01x:Number;
private var q20w01y:Number;
private var q01w12x:Number;
private var q01w12y:Number;
private var q12w12x:Number;
private var q12w12y:Number;
private var q20w12x:Number;
private var q20w12y:Number;
private var q01w20x:Number;
private var q01w20y:Number;
private var q12w20x:Number;
private var q12w20y:Number;
private var q20w20x:Number;
private var q20w20y:Number;
private var q01w01d:Number;
private var q12w01d:Number;
private var q20w01d:Number;
private var q01w12d:Number;
private var q12w12d:Number;
private var q20w12d:Number;
private var q01w20d:Number;
private var q12w20d:Number;
private var q20w20d:Number;
private var az:Number;
private var bz:Number;
private function zconflict(q:RenderableListItem, w:RenderableListItem):int
{
if (q is RenderTriangle && q.instance.testQuad)
{
if (w is RenderTriangle && q.instance.testQuad)
return zconflictTT(q as RenderTriangle, w as RenderTriangle);
}
return ZOrderIrrelevant;
}
private function zconflictTT(q:RenderTriangle, w:RenderTriangle):int
{
q0x = q.v0.x;
q0y = q.v0.y;
q1x = q.v1.x;
q1y = q.v1.y;
q2x = q.v2.x;
q2y = q.v2.y;
w0x = w.v0.x;
w0y = w.v0.y;
w1x = w.v1.x;
w1y = w.v1.y;
w2x = w.v2.x;
w2y = w.v2.y;
ql01a = q1y - q0y;
ql01b = q0x - q1x;
ql01c = -(ql01b*q0y + ql01a*q0x);
ql01s = ql01a*q2x + ql01b*q2y + ql01c;
ql01w0 = (ql01a*w0x + ql01b*w0y + ql01c) * ql01s;
ql01w1 = (ql01a*w1x + ql01b*w1y + ql01c) * ql01s;
ql01w2 = (ql01a*w2x + ql01b*w2y + ql01c) * ql01s;
if ((ql01w0 <= 0.0001) && (ql01w1 <= 0.0001) && (ql01w2 <= 0.0001))
return ZOrderIrrelevant;
ql12a = q2y - q1y;
ql12b = q1x - q2x;
ql12c = -(ql12b*q1y + ql12a*q1x);
ql12s = ql12a*q0x + ql12b*q0y + ql12c;
ql12w0 = (ql12a*w0x + ql12b*w0y + ql12c) * ql12s;
ql12w1 = (ql12a*w1x + ql12b*w1y + ql12c) * ql12s;
ql12w2 = (ql12a*w2x + ql12b*w2y + ql12c) * ql12s;
if ((ql12w0 <= 0.0001) && (ql12w1 <= 0.0001) && (ql12w2 <= 0.0001))
return ZOrderIrrelevant;
ql20a = q0y - q2y;
ql20b = q2x - q0x;
ql20c = -(ql20b*q2y + ql20a*q2x);
ql20s = ql20a*q1x + ql20b*q1y + ql20c;
ql20w0 = (ql20a*w0x + ql20b*w0y + ql20c) * ql20s;
ql20w1 = (ql20a*w1x + ql20b*w1y + ql20c) * ql20s;
ql20w2 = (ql20a*w2x + ql20b*w2y + ql20c) * ql20s;
if ((ql20w0 <= 0.0001) && (ql20w1 <= 0.0001) && (ql20w2 <= 0.0001))
return ZOrderIrrelevant;
wl01a = w1y - w0y;
wl01b = w0x - w1x;
wl01c = -(wl01b*w0y + wl01a*w0x);
wl01s = wl01a*w2x + wl01b*w2y + wl01c;
wl01q0 = (wl01a*q0x + wl01b*q0y + wl01c) * wl01s;
wl01q1 = (wl01a*q1x + wl01b*q1y + wl01c) * wl01s;
wl01q2 = (wl01a*q2x + wl01b*q2y + wl01c) * wl01s;
if ((wl01q0 <= 0.0001) && (wl01q1 <= 0.0001) && (wl01q2 <= 0.0001))
return ZOrderIrrelevant;
wl12a = w2y - w1y;
wl12b = w1x - w2x;
wl12c = -(wl12b*w1y + wl12a*w1x);
wl12s = wl12a*w0x + wl12b*w0y + wl12c;
wl12q0 = (wl12a*q0x + wl12b*q0y + wl12c) * wl12s;
wl12q1 = (wl12a*q1x + wl12b*q1y + wl12c) * wl12s;
wl12q2 = (wl12a*q2x + wl12b*q2y + wl12c) * wl12s;
if ((wl12q0 <= 0.0001) && (wl12q1 <= 0.0001) && (wl12q2 <= 0.0001))
return ZOrderIrrelevant;
wl20a = w0y - w2y;
wl20b = w2x - w0x;
wl20c = -(wl20b*w2y + wl20a*w2x);
wl20s = wl20a*w1x + wl20b*w1y + wl20c;
wl20q0 = (wl20a*q0x + wl20b*q0y + wl20c) * wl20s;
wl20q1 = (wl20a*q1x + wl20b*q1y + wl20c) * wl20s;
wl20q2 = (wl20a*q2x + wl20b*q2y + wl20c) * wl20s;
if ((wl20q0 <= 0.0001) && (wl20q1 <= 0.0001) && (wl20q2 <= 0.0001))
return ZOrderIrrelevant;
if (((wl01q0*wl01q0 <= 0.0001) || (wl12q0*wl12q0 <= 0.0001) || (wl20q0*wl20q0 <= 0.0001))
&& ((wl01q1*wl01q1 <= 0.0001) || (wl12q1*wl12q1 <= 0.0001) || (wl20q1*wl20q1 <= 0.0001))
&& ((wl01q2*wl01q2 <= 0.0001) || (wl12q2*wl12q2 <= 0.0001) || (wl20q2*wl20q2 <= 0.0001)))
{
return zcompare(q, w, (q0x+q1x+q2x)/3, (q0y+q1y+q2y)/3);
}
if (((ql01w0*ql01w0 <= 0.0001) || (ql12w0*ql12w0 <= 0.0001) || (ql20w0*ql20w0 <= 0.0001))
&& ((ql01w1*ql01w1 <= 0.0001) || (ql12w1*ql12w1 <= 0.0001) || (ql20w1*ql20w1 <= 0.0001))
&& ((ql01w2*ql01w2 <= 0.0001) || (ql12w2*ql12w2 <= 0.0001) || (ql20w2*ql20w2 <= 0.0001)))
{
return zcompare(q, w, (w0x+w1x+w2x)/3, (w0y+w1y+w2y)/3);
}
q01w01 = ((wl01q0*wl01q1 < 0.0001) && (ql01w0*ql01w1 < 0.0001));
q12w01 = ((wl01q1*wl01q2 < 0.0001) && (ql12w0*ql12w1 < 0.0001));
q20w01 = ((wl01q2*wl01q0 < 0.0001) && (ql20w0*ql20w1 < 0.0001));
q01w12 = ((wl12q0*wl12q1 < 0.0001) && (ql01w1*ql01w2 < 0.0001));
q12w12 = ((wl12q1*wl12q2 < 0.0001) && (ql12w1*ql12w2 < 0.0001));
q20w12 = ((wl12q2*wl12q0 < 0.0001) && (ql20w1*ql20w2 < 0.0001));
q01w20 = ((wl20q0*wl20q1 < 0.0001) && (ql01w2*ql01w0 < 0.0001));
q12w20 = ((wl20q1*wl20q2 < 0.0001) && (ql12w2*ql12w0 < 0.0001));
q20w20 = ((wl20q2*wl20q0 < 0.0001) && (ql20w2*ql20w0 < 0.0001));
count = 0;
cx = 0;
cy = 0;
if ((ql01w0 > 0.0001) && (ql12w0 > 0.0001) && (ql20w0 > 0.0001))
{
cx += w0x;
cy += w0y;
count += 1;
}
if ((ql01w1 > 0.0001) && (ql12w1 > 0.0001) && (ql20w1 > 0.0001))
{
cx += w1x;
cy += w1y;
count += 1;
}
if ((ql01w2 > 0.0001) && (ql12w2 > 0.0001) && (ql20w2 > 0.0001))
{
cx += w2x;
cy += w2y;
count += 1;
}
if ((wl01q0 > 0.0001) && (wl12q0 > 0.0001) && (wl20q0 > 0.0001))
{
cx += q0x;
cy += q0y;
count += 1;
}
if ((wl01q1 > 0.0001) && (wl12q1 > 0.0001) && (wl20q1 > 0.0001))
{
cx += q1x;
cy += q1y;
count += 1;
}
if ((wl01q2 > 0.0001) && (wl12q2 > 0.0001) && (wl20q2 > 0.0001))
{
cx += q2x;
cy += q2y;
count += 1;
}
if (q01w01)
{
q01w01d = ql01a*wl01b - ql01b*wl01a;
if (q01w01d*q01w01d > 0.0001)
{
q01w01x = (ql01b*wl01c - ql01c*wl01b) / q01w01d;
q01w01y = (ql01c*wl01a - ql01a*wl01c) / q01w01d;
cx += q01w01x;
cy += q01w01y;
count += 1;
}
}
if (q12w01)
{
q12w01d = ql12a*wl01b - ql12b*wl01a;
if (q12w01d*q12w01d > 0.0001)
{
q12w01x = (ql12b*wl01c - ql12c*wl01b) / q12w01d;
q12w01y = (ql12c*wl01a - ql12a*wl01c) / q12w01d;
cx += q12w01x;
cy += q12w01y;
count += 1;
}
}
if (q20w01)
{
q20w01d = ql20a*wl01b - ql20b*wl01a;
if (q20w01d*q20w01d > 0.0001)
{
q20w01x = (ql20b*wl01c - ql20c*wl01b) / q20w01d;
q20w01y = (ql20c*wl01a - ql20a*wl01c) / q20w01d;
cx += q20w01x;
cy += q20w01y;
count += 1;
}
}
if (q01w12)
{
q01w12d = ql01a*wl12b - ql01b*wl12a;
if (q01w12d*q01w12d > 0.0001)
{
q01w12x = (ql01b*wl12c - ql01c*wl12b) / q01w12d;
q01w12y = (ql01c*wl12a - ql01a*wl12c) / q01w12d;
cx += q01w12x;
cy += q01w12y;
count += 1;
}
}
if (q12w12)
{
q12w12d = ql12a*wl12b - ql12b*wl12a;
if (q12w12d*q12w12d > 0.0001)
{
q12w12x = (ql12b*wl12c - ql12c*wl12b) / q12w12d;
q12w12y = (ql12c*wl12a - ql12a*wl12c) / q12w12d;
cx += q12w12x;
cy += q12w12y;
count += 1;
}
}
if (q20w12)
{
q20w12d = ql20a*wl12b - ql20b*wl12a;
if (q20w12d*q20w12d > 0.0001)
{
q20w12x = (ql20b*wl12c - ql20c*wl12b) / q20w12d;
q20w12y = (ql20c*wl12a - ql20a*wl12c) / q20w12d;
cx += q20w12x;
cy += q20w12y;
count += 1;
}
}
if (q01w20)
{
q01w20d = ql01a*wl20b - ql01b*wl20a;
if (q01w20d*q01w20d > 0.0001)
{
q01w20x = (ql01b*wl20c - ql01c*wl20b) / q01w20d;
q01w20y = (ql01c*wl20a - ql01a*wl20c) / q01w20d;
cx += q01w20x;
cy += q01w20y;
count += 1;
}
}
if (q12w20)
{
q12w20d = ql12a*wl20b - ql12b*wl20a;
if (q12w20d*q12w20d > 0.0001)
{
q12w20x = (ql12b*wl20c - ql12c*wl20b) / q12w20d;
q12w20y = (ql12c*wl20a - ql12a*wl20c) / q12w20d;
cx += q12w20x;
cy += q12w20y;
count += 1;
}
}
if (q20w20)
{
q20w20d = ql20a*wl20b - ql20b*wl20a;
if (q20w20d*q20w20d > 0.0001)
{
q20w20x = (ql20b*wl20c - ql20c*wl20b) / q20w20d;
q20w20y = (ql20c*wl20a - ql20a*wl20c) / q20w20d;
cx += q20w20x;
cy += q20w20y;
count += 1;
}
}
return zcompare(q, w, cx / count, cy / count);
}
private function zcompare(a:RenderableListItem, b:RenderableListItem, x:Number, y:Number):int
{
az = a.getZ(x, y, _focus);
bz = b.getZ(x, y, _focus);
if (az > bz)
return ZOrderDeeper;
if (az < bz)
return ZOrderHigher;
return ZOrderSame;
}
Creates a new <code>@ax-student-ar-org-papervision3d-core-render-filter-QuadrantZFilter</code> object.
@param maxdelay [optional] The maximum time the filter can take to resolve z-depth before timing out.
public function @ax-student-ar-org-papervision3d-core-render-filter-QuadrantZFilter(maxdelay:int = 60000)
{
this.maxdelay = maxdelay;
}
@inheritDoc
public override function filterTree(tree:QuadTree, scene:Scene3D, camera:Camera3D, clip:Clipping):void
{
start = getTimer();
check = 0;
primitives = tree.list();
_focus = camera.focus;
turn = 0;
while (primitives.length > 0)
{
leftover = new Array();
for each (pri in primitives)
{
check++;
if (check == 10)
if (getTimer() - start > maxdelay)
return;
else
check = 0;
maxZ = pri.maxZ + 1000;
minZ = pri.minZ - 1000;
maxdeltaZ = 0;
rivals = tree.getOverlaps(pri);
for each (rival in rivals)
{
if (rival == pri)
continue;
switch (zconflict(pri, rival))
{
case ZOrderIrrelevant:
break;
case ZOrderDeeper:
if (minZ < rival.screenZ)
minZ = rival.screenZ;
break;
case ZOrderHigher:
if (maxZ > rival.screenZ)
maxZ = rival.screenZ;
break;
}
}
if (maxZ >= pri.screenZ && pri.screenZ >= minZ)
{
// screenZ still sits between the maxZ and minZ
}
else if (maxZ >= minZ)
{
//screenZ has to be re-calculated for the new maxZ and minZ
pri.screenZ = (maxZ + minZ) / 2;
}
else
{
//there is no value for screenZ, triangle is flagged for tesselation
if (turn % 3 == 2)
{
parts = pri.quarter(camera.focus);
if (parts != null){
tree.remove(pri);
for each (part in parts)
{
//part.screenZ = pri.screenZ;
leftover.push(part);
tree.add(part);
}
}
}
else{
leftover.push(pri);
}
}
}
primitives = leftover;
turn += 1;
if (turn == 20)
break;
}
}
Used to trace the values of a filter.
returns: A string representation of the filter object.
public function toString():String
{
return "@ax-student-ar-org-papervision3d-core-render-filter-QuadrantZFilter" + ((maxdelay == 60000) ? "" : "("+maxdelay+"ms)");
}
}
}
(C) Æliens
04/09/2009
You may not copy or print any of this material without explicit permission of the author or the publisher.
In case of other copyright issues, contact the author.
