/usr/src/castle-game-engine-4.1.1/x3d/x3dnodes_coordpolygons.inc is in castle-game-engine-src 4.1.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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{ Common utility class for nodes that implement CoordPolygons
by calling MakeCoordRanges,
and then doing the work inside HandleCoordRange. }
TCoordRangePolygonizer = class
Polygon: TIndexedPolygonHandler;
{ This should be overridden to call Polygon procedure. }
procedure HandleCoordRange(const RangeNumber: Cardinal;
BeginIndex, EndIndex: Integer); virtual; abstract;
end;
{ TriangleFanSet ------------------------------------------------------------- }
type
TTriangleFanSetPolygonizer = class(TCoordRangePolygonizer)
procedure HandleCoordRange(const RangeNumber: Cardinal;
BeginIndex, EndIndex: Integer); override;
end;
procedure TTriangleFanSetPolygonizer.HandleCoordRange(
const RangeNumber: Cardinal;
BeginIndex, EndIndex: Integer);
var
FirstIndex: Integer;
begin
FirstIndex := BeginIndex;
while BeginIndex + 2 < EndIndex do
begin
Polygon([FirstIndex, BeginIndex + 1, BeginIndex + 2]);
Inc(BeginIndex);
end;
end;
procedure TIndexedTriangleFanSetNode.CoordPolygons(
State: TX3DGraphTraverseState;
PolygonHandler: TIndexedPolygonHandler);
var
Polygonizer: TTriangleFanSetPolygonizer;
begin
Polygonizer := TTriangleFanSetPolygonizer.Create;
try
Polygonizer.Polygon := PolygonHandler;
MakeCoordRanges(State, @Polygonizer.HandleCoordRange);
finally FreeAndNil(Polygonizer) end;
end;
procedure TTriangleFanSetNode.CoordPolygons(
State: TX3DGraphTraverseState;
PolygonHandler: TIndexedPolygonHandler);
var
Polygonizer: TTriangleFanSetPolygonizer;
begin
Polygonizer := TTriangleFanSetPolygonizer.Create;
try
Polygonizer.Polygon := PolygonHandler;
MakeCoordRanges(State, @Polygonizer.HandleCoordRange);
finally FreeAndNil(Polygonizer) end;
end;
{ TriangleStripSet ----------------------------------------------------------- }
type
TTriangleStripSetPolygonizer = class(TCoordRangePolygonizer)
procedure HandleCoordRange(const RangeNumber: Cardinal;
BeginIndex, EndIndex: Integer); override;
end;
procedure TTriangleStripSetPolygonizer.HandleCoordRange(
const RangeNumber: Cardinal;
BeginIndex, EndIndex: Integer);
var
NormalOrder: boolean;
begin
NormalOrder := true;
while BeginIndex + 2 < EndIndex do
begin
if NormalOrder then
Polygon([BeginIndex , BeginIndex + 1, BeginIndex + 2]) else
Polygon([BeginIndex + 1, BeginIndex , BeginIndex + 2]);
Inc(BeginIndex);
NormalOrder := not NormalOrder;
end;
end;
procedure TIndexedTriangleStripSetNode.CoordPolygons(
State: TX3DGraphTraverseState;
PolygonHandler: TIndexedPolygonHandler);
var
Polygonizer: TTriangleStripSetPolygonizer;
begin
Polygonizer := TTriangleStripSetPolygonizer.Create;
try
Polygonizer.Polygon := PolygonHandler;
MakeCoordRanges(State, @Polygonizer.HandleCoordRange);
finally FreeAndNil(Polygonizer) end;
end;
procedure TTriangleStripSetNode.CoordPolygons(
State: TX3DGraphTraverseState;
PolygonHandler: TIndexedPolygonHandler);
var
Polygonizer: TTriangleStripSetPolygonizer;
begin
Polygonizer := TTriangleStripSetPolygonizer.Create;
try
Polygonizer.Polygon := PolygonHandler;
MakeCoordRanges(State, @Polygonizer.HandleCoordRange);
finally FreeAndNil(Polygonizer) end;
end;
procedure TIndexedTriangleMeshNode_1.CoordPolygons(
State: TX3DGraphTraverseState;
PolygonHandler: TIndexedPolygonHandler);
var
Polygonizer: TTriangleStripSetPolygonizer;
begin
Polygonizer := TTriangleStripSetPolygonizer.Create;
try
Polygonizer.Polygon := PolygonHandler;
MakeCoordRanges(State, @Polygonizer.HandleCoordRange);
finally FreeAndNil(Polygonizer) end;
end;
{ TriangleSet ---------------------------------------------------------------- }
procedure TriangleSetPolygonizer(
const CoordCount: Cardinal;
PolygonHandler: TIndexedPolygonHandler);
var
I: Cardinal;
begin
I := 0;
while I + 2 < CoordCount do
begin
PolygonHandler([I, I + 1, I + 2]);
I += 3;
end;
end;
procedure TIndexedTriangleSetNode.CoordPolygons(
State: TX3DGraphTraverseState;
PolygonHandler: TIndexedPolygonHandler);
begin
if Coordinates(State) <> nil then
TriangleSetPolygonizer(CoordIndex.Count, PolygonHandler);
end;
procedure TTriangleSetNode.CoordPolygons(
State: TX3DGraphTraverseState;
PolygonHandler: TIndexedPolygonHandler);
var
ACoord: TMFVec3f;
begin
ACoord := Coordinates(State);
if ACoord <> nil then
TriangleSetPolygonizer(ACoord.Count, PolygonHandler);
end;
{ QuadSet ---------------------------------------------------------------- }
procedure QuadSetPolygonizer(
const CoordCount: Cardinal;
PolygonHandler: TIndexedPolygonHandler);
var
I: Cardinal;
begin
I := 0;
while I + 3 < CoordCount do
begin
PolygonHandler([I, I + 1, I + 2, I + 3]);
I += 4;
end;
end;
procedure TIndexedQuadSetNode.CoordPolygons(
State: TX3DGraphTraverseState;
PolygonHandler: TIndexedPolygonHandler);
begin
if Coordinates(State) <> nil then
QuadSetPolygonizer(CoordIndex.Count, PolygonHandler);
end;
procedure TQuadSetNode.CoordPolygons(
State: TX3DGraphTraverseState;
PolygonHandler: TIndexedPolygonHandler);
var
ACoord: TMFVec3f;
begin
ACoord := Coordinates(State);
if ACoord <> nil then
QuadSetPolygonizer(ACoord.Count, PolygonHandler);
end;
{ TriangleFanSet ------------------------------------------------------------- }
type
TIndexedFaceSetPolygonizer = class(TCoordRangePolygonizer)
procedure HandleCoordRange(const RangeNumber: Cardinal;
BeginIndex, EndIndex: Integer); override;
end;
procedure TIndexedFaceSetPolygonizer.HandleCoordRange(
const RangeNumber: Cardinal;
BeginIndex, EndIndex: Integer);
var
Indexes: array of Cardinal;
I: Cardinal;
begin
SetLength(Indexes, EndIndex - BeginIndex);
if High(Indexes) >= 0 then
for I := 0 to High(Indexes) do
Indexes[I] := I + Cardinal(BeginIndex);
Polygon(Indexes);
end;
procedure TIndexedFaceSetNode_1.CoordPolygons(
State: TX3DGraphTraverseState;
PolygonHandler: TIndexedPolygonHandler);
var
Polygonizer: TIndexedFaceSetPolygonizer;
begin
Polygonizer := TIndexedFaceSetPolygonizer.Create;
try
Polygonizer.Polygon := PolygonHandler;
MakeCoordRanges(State, @Polygonizer.HandleCoordRange);
finally FreeAndNil(Polygonizer) end;
end;
procedure TIndexedFaceSetNode.CoordPolygons(
State: TX3DGraphTraverseState;
PolygonHandler: TIndexedPolygonHandler);
var
Polygonizer: TIndexedFaceSetPolygonizer;
begin
Polygonizer := TIndexedFaceSetPolygonizer.Create;
try
Polygonizer.Polygon := PolygonHandler;
MakeCoordRanges(State, @Polygonizer.HandleCoordRange);
finally FreeAndNil(Polygonizer) end;
end;
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