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mesh.pas
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unit mesh;
{$Include opts.inc}
{$mode objfpc}{$H+}
interface
uses
{$IFDEF DGL} dglOpenGL, {$ELSE DGL} {$IFDEF COREGL}glcorearb, {$ELSE} gl, {$ENDIF} {$ENDIF DGL}
{$IFDEF CTM} ctm_loader, {$ENDIF}
Classes, SysUtils, Forms, Controls, Graphics, Dialogs, strutils,
base64, zstream, LcLIntf, nifti_loader, colorTable, matmath, math,
define_types, nifti_types, fileutil;
const
kMinOverlayIndex = 1;
kMaxOverlays = 256;
kLUTinvisible = 0;
kLUTtranslucent = 1;
kLUTopaque = 2;
type
TSphere = packed record
X: single;
Y: single;
Z: single;
Clr: single;
Radius: single;
end;
TOverlay = record
LUTinvert: boolean;
LUTvisible: integer; //0=invisible, 1=translucent, 2=opaque
LUTindex,atlasMaxIndex : integer;
LUT: TLUT;
minIntensity, maxIntensity, windowScaledMin, windowScaledMax: single;
filename: string;
intensity: TFloats;
//next: if loaded as mesh...
faces : TFaces;
vertices: TVertices;
vertexRGBA : array of TRGBA;
vertexAtlas: TInts; //what atlss regions does this vertex belong to, e.g. [7, 8, 17...] the 3rd vertex belongs to region 17
atlasTransparentFilter: TBools;
atlasHideFilter: TInts; //atlas show these atlas regions, e.g. if [7, 8, 22] then only regions 7,8 and 22 will be visible
end;
TNodePrefs = record //preferences for nodes
minEdge, maxEdge, maxEdgeAbs, minEdgeThresh, maxEdgeThresh, minNodeColor, maxNodeColor, minNodeSize, maxNodeSize,
minNodeThresh, maxNodeThresh, scaleNodeSize, scaleEdgeSize, thresholdNodeFrac: single;
nodeLUTindex , edgeLUTindex: integer;
isNodeThresholdBySize, isNoNegEdge, isNoPosEdge, isNoLeftNodes,isNoRightNodes,isNoNodeWithoutEdge, isNodeColorVaries, isEdgeColorVaries, isEdgeSizeVaries, isEdgeShowNeg, isEdgeShowPos : boolean;
end;
type
TMesh = class
scale, vertexRgbaSaturation, vertexRgbaAlpha : single;
origin, mxV, mnV : TPoint3f;
{$IFDEF COREGL}
vao, vbo, vaoOverlay, vboOverlay: GLuint;
nFacesOverlay: integer;
{$ELSE}
displayList, displayListOverlay : GLuint;
{$ENDIF}
isZDimIsUp, isRebuildList, isBusy, isNode, isFreeSurferMesh, isVisible, isAdditiveOverlay : boolean;
nodePrefs: TNodePrefs;
OpenOverlays, OverlayTransparency, AtlasMaxIndex : integer;
overlay: array [kMinOverlayIndex..kMaxOverlays] of TOverlay;
nodes: array of TSphere;
edges: array of array of Single;
faces : array of TPoint3i;
vertices: array of TPoint3f;
vertexRGBA : array of TRGBA;
vertexAtlas: TInts; //what atlss regions does this vertex belong to, e.g. [7, 8, 17...] the 3rd vertex belongs to region 17
atlasTransparentFilter: TBools;
atlasHideFilter: TInts; //atlas show these atlas regions, e.g. if [7, 8, 22] then only regions 7,8 and 22 will be visible
tempIntensityLUT : TFloats; //only used to load without external files - flushed after LoadOverlay
errorString: string;
//overlay: array of single;
private
function CheckMesh: boolean;
procedure SetOverlayDescriptives(lOverlayIndex: integer);
procedure MinMaxPct(lOverlayIndex, num_v: integer; var mx, mn: single; isExcludeZero: boolean);
procedure SetDescriptives;
procedure MakeSphere;
procedure BuildListCore(Clr: TRGBA; var f: TFaces; var v: TVertices; var vtxRGBA: TVertexRGBA);
procedure BuildListPartialAtlas(Clr: TRGBA; vtxRGBA: TVertexRGBA);
procedure BuildList(Clr: TRGBA);
procedure FilterOverlay(c: integer; var f: TFaces; var v: TVertices; var vRGBA: TVertexRGBA);
procedure BuildListOverlay(Clr: TRGBA);
function Load3Do(const FileName: string): boolean;
function Load3ds(const FileName: string): boolean;
function LoadAc(const FileName: string): boolean;
function LoadAnnot(const FileName: string): boolean;
function loadCifti(fnm: string; lOverlayIndex, lSeriesIndex: integer; isLoadCortexLeft: boolean): integer;
function LoadDae(const FileName: string): boolean; //only subset!
function LoadDfs(const FileName: string): boolean;
function LoadDxf(const FileName: string): boolean;
function LoadGcs(const FileName: string): boolean;
function LoadGii(const FileName: string; lOverlayIndex, lOverlayItem: integer): integer;
function LoadGts(const FileName: string): boolean;
function LoadJson(const FileName: string): boolean;
function LoadLwo(const FileName: string): boolean;
function LoadMesh(const FileName: string): boolean;
function LoadMeshAscii(const FileName: string): boolean;
function LoadMs3d(const FileName: string): boolean;
//function LoadVbo(const FileName: string): boolean;
function LoadMz3(const FileName: string; lOverlayIndex : integer): boolean;
function LoadPrwm(const FileName: string): boolean;
function LoadObjMni(const FileName: string): boolean;
function LoadOff(const FileName: string): boolean;
function LoadPly2(const FileName: string): boolean;
function LoadSrf(const FileName: string): boolean;
function LoadSurf(const FileName: string): boolean;
function LoadTri(const FileName: string): boolean;
function LoadWfr(const FileName: string): boolean; //EMSE wireframe
procedure LoadAsc_Srf(const FileName: string);
procedure LoadCtm(const FileName: string);
function LoadDpv(const FileName: string; lOverlayIndex: integer): boolean;
function LoadAtlasMapCore(lOverlayIndex: integer; intensityLUT: TFloats): string;
function LoadAtlasMap(const FileName: string; lOverlayIndex: integer): boolean;
procedure LoadCurv(const FileName: string; lOverlayIndex: integer);
procedure LoadMeshAsOverlay(const FileName: string; lOverlayIndex: integer);
procedure LoadNii(const FileName: string; lOverlayIndex: integer; lLoadSmooth: boolean);
function LoadCluster(const FileName: string): boolean;
procedure LoadNode(const FileName: string; out isEmbeddedEdge: boolean);
procedure LoadNv(const FileName: string);
procedure LoadObj(const FileName: string);
procedure LoadPial(const FileName: string);
procedure LoadPly(const FileName: string);
procedure LoadStl(const FileName: string);
procedure LoadStlAscii(const FileName: string);
procedure LoadVtk(const FileName: string);
procedure LoadW(const FileName: string; lOverlayIndex: integer);
public
procedure MakePyramid;
//function AtlasStatMapCore(AtlasName, StatName: string; Indices: TInts; Intensities: TFloats): string;
//function AtlasMaxIndex: integer;
procedure DrawGL (Clr: TRGBA; clipPlane: TPoint4f; isFlipMeshOverlay: boolean);
procedure Node2Mesh;
procedure ReverseFaces;
procedure CenterOrigin;
procedure SwapYZ;
procedure SwapZY;
function LoadFromFile(const FileName: string): boolean;
function LoadEdge(const FileName: string; isEmbeddedEdge: boolean): boolean;
function LoadOverlay(const FileName: string; lLoadSmooth: boolean): boolean;
procedure CloseOverlaysCore;
procedure CloseOverlays;
procedure Close;
constructor Create;
procedure SaveMz3(const FileName: string);
procedure SaveGii(const FileName: string);
procedure SaveObj(const FileName: string);
procedure SavePly(const FileName: string);
procedure SaveMesh(const FileName: string);
procedure SaveOverlay(const FileName: string; OverlayIndex: integer);
destructor Destroy; override;
end;
implementation
uses
mainunit,
meshify_simplify,shaderu, {$IFDEF COREGL} gl_core_3d {$ELSE} gl_legacy_3d {$ENDIF};
//{$IFDEF COREGL}
function mixRGBA(c1, c2: TRGBA; frac2: single): TRGBA;
var
frac1: single;
begin
frac2 := ((c2.a * frac2 )/255.0);
frac1 := 1 - frac2;
result.R := round(c1.R*frac1 + c2.R*frac2) ;
result.G := round(c1.G*frac1 + c2.G*frac2);
result.B := round(c1.B*frac1 + c2.B*frac2);
end;
//{$ENDIF}
procedure AddPt4f(var v: TPoint4f; c1,c2,c3: TRGBA); //create float vector
begin
v.X := v.X + c1.r+ c2.r+ c3.r;
v.Y := v.Y + c1.g+ c2.g+ c3.g;
v.Z := v.Z + c1.b+ c2.b+ c3.b;
v.W := v.W + c1.a+ c2.a+ c3.a;
end;
procedure TMesh.BuildListCore(Clr: TRGBA; var f: TFaces; var v: TVertices; var vtxRGBA: TVertexRGBA);
var
i,c, translucent: integer;
mn, mx: single;
rgb, rgb0: TRGBA;
vRGBA, vRGBAmx :TVertexRGBA;
vNumNeighbor: array of integer;
vSumRGBBA: array of TPoint4f;
isOverlayPainting : boolean = false;
begin
if (length(f) < 1) or (length(v) < 3) then exit;
isOverlayPainting := false;
if (OpenOverlays > 0) then //ignore overlays if they are all meshes rather than vertex colors
for c := OpenOverlays downto 1 do
if (overlay[c].LUTvisible <> kLUTinvisible) and (length(overlay[c].intensity) = length(v)) then
isOverlayPainting := true;
if (isOverlayPainting) or (length(vtxRGBA) = length(v)) then begin
rgb := RGBA(Clr.R, Clr.G, Clr.B, 0);
setlength(vRGBA, length(v));
if (length(vtxRGBA) = length(v)) then begin
c := round(vertexRgbaAlpha * 255);
if vertexRgbaSaturation >= 1 then begin
for i := 0 to (length(v)-1) do begin
vRGBA[i].r := vtxRGBA[i].r; vRGBA[i].g := vtxRGBA[i].g; vRGBA[i].b := vtxRGBA[i].b; vRGBA[i].a := c;
end;
end else begin
for i := 0 to (length(v)-1) do
vRGBA[i] := desaturateRGBA ( vtxRGBA[i], vertexRgbaSaturation, C);
end;
{$IFDEF COREGL}
if (vertexRGBAAlpha < 1.0) then
for i := 0 to (length(v)-1) do
vRGBA[i] := mixRGBA( Clr, vRGBA[i], vertexRGBAAlpha);
{$ENDIF}
end else begin
for i := 0 to (length(v)-1) do
vRGBA[i] := rgb;
end;
if (OpenOverlays > 0) then begin
if isAdditiveOverlay then begin
setlength(vRGBAmx, length(v));
rgb0 := RGBA(0,0,0,0);
for i := 0 to (length(v)-1) do
vRGBAmx[i] := rgb0;
for c := OpenOverlays downto 1 do begin
if (overlay[c].LUTvisible <> kLUTinvisible) and (length(overlay[c].intensity) = length(v)) then begin
if overlay[c].LUTvisible <> kLUTopaque then
translucent := 2 //if translucent, halve alpha
else
translucent := 1;
if overlay[c].windowScaledMax > overlay[c].windowScaledMin then begin
mn := overlay[c].windowScaledMin;
mx := overlay[c].windowScaledMax;
end else begin
mx := overlay[c].windowScaledMin;
mn := overlay[c].windowScaledMax;
end;
for i := 0 to (length(v)-1) do begin
rgb := inten2rgb(overlay[c].intensity[i], mn, mx, overlay[c].LUT);
rgb.A := rgb.A div translucent;
vRGBAmx[i] := maxRGBA(vRGBAmx[i], rgb);
end; //for i
end; //if visible
end; //for c
for i := 0 to (length(v)-1) do
vRGBA[i] := blendRGBA(vRGBA[i],vRGBAmx[i]);
end else begin
//GLForm1.caption := 'xxxxx'+(inttostr(vRGBA[i].A));
for c := OpenOverlays downto 1 do begin
if (overlay[c].LUTvisible <> kLUTinvisible) and (length(overlay[c].intensity) = length(v)) then begin
if overlay[c].LUTvisible <> kLUTopaque then
translucent := 2 //if translucent, halve alpha
else
translucent := 1;
if overlay[c].windowScaledMax > overlay[c].windowScaledMin then begin
mn := overlay[c].windowScaledMin;
mx := overlay[c].windowScaledMax;
end else begin
mx := overlay[c].windowScaledMin;
mn := overlay[c].windowScaledMax;
end;
for i := 0 to (length(v)-1) do begin
rgb := inten2rgb(overlay[c].intensity[i], mn, mx, overlay[c].LUT);
rgb.A := rgb.A div translucent;
vRGBA[i] := blendRGBA(vRGBA[i], rgb);
end; //for i
end; //if visible
end; //for c
end;
if (length(vtxRGBA) < 1) then begin //feather edges of overlay
setlength(vNumNeighbor, length(v));
setlength(vSumRGBBA, length(v));
for i := 0 to (length(v)-1) do begin
vNumNeighbor[i] := 0;
vSumRGBBA[i] := pt4f(0,0,0,0);
end;
for i := 0 to (length(f)-1) do begin
AddPt4f(vSumRGBBA[f[i].X], vRGBA[f[i].X], vRGBA[f[i].Y], vRGBA[f[i].Z]);
AddPt4f(vSumRGBBA[f[i].Y], vRGBA[f[i].X], vRGBA[f[i].Y], vRGBA[f[i].Z]);
AddPt4f(vSumRGBBA[f[i].Z], vRGBA[f[i].X], vRGBA[f[i].Y], vRGBA[f[i].Z]);
inc(vNumNeighbor[f[i].X],3);
inc(vNumNeighbor[f[i].Y],3);
inc(vNumNeighbor[f[i].Z],3);
end;
for i := 0 to (length(v)-1) do begin
if (vNumNeighbor[i] > 0) then begin //vertex at edge: neighbors both colored and uncolored v
vRGBA[i].a := round(vSumRGBBA[i].W / vNumNeighbor[i]);
if {(vRGBA[i].a < 255) and} (vRGBA[i].a > 0) then begin
vRGBA[i].r := round( vSumRGBBA[i].X / vNumNeighbor[i]);
vRGBA[i].g := round( vSumRGBBA[i].Y / vNumNeighbor[i]);
vRGBA[i].b := round( vSumRGBBA[i].Z / vNumNeighbor[i]);
end;
end;
end;
vNumNeighbor := nil;
//vNumColorNeighbor := nil;
vSumRGBBA := nil;
end; //end feather edges
(*if (length(vtxRGBA) < 1) then begin //feather edges if regions without overlay have alpha = 0
setlength(vZeroNeighbor, length(v));
for i := 0 to (length(v)-1) do
vZeroNeighbor[i] := false;
for i := 0 to (length(f)-1) do begin
if (vRGBA[f[i].X].A = 0) or (vRGBA[f[i].Y].A = 0) or (vRGBA[f[i].Z].A = 0) then begin
vZeroNeighbor[f[i].X] := true;
vZeroNeighbor[f[i].Y] := true;
vZeroNeighbor[f[i].Z] := true;
end;
end;
for i := 0 to (length(v)-1) do
if(vZeroNeighbor[i]) then
vRGBA[i].a := vRGBA[i].a shr 1; //make edges more transparent
end; //end feather edges
*)
{$IFDEF COREGL} //with new openGL we mix here
mx := 1.0 - OverlayTransparency/100;
if mx < 0 then mx := 0;
if mx > 1 then mx := 1;
//if (OverlayTransparency > 0 ) and (OverlayTransparency <= 100) then
for i := 0 to (length(v)-1) do
vRGBA[i] := mixRGBA( Clr, vRGBA[i], mx);
{$ELSE} //with old GLSL we mix in the shader
if (OverlayTransparency > 0 ) and (OverlayTransparency <= 100) then begin
for i := 0 to (length(v)-1) do
vRGBA[i].a := round( vRGBA[i].a * (1 - (OverlayTransparency /100)) );
end;
{$ENDIF}
end; // if OpenOverlays > 0
{$IFDEF COREGL}
//the purpose of the next loop is to allow us to hide curvature
for c := OpenOverlays downto 1 do begin
if isFreeSurferLUT(overlay[c].LUTindex) then begin
for i := 0 to (length(v)-1) do begin
mn := ((overlay[c].intensity[i] + 1.0) * 0.5); //convert curvature to range 0..1
if (mn < 0) then mn := 0;
if (mn > 1) then mn := 1;
mn := mn * 255.0;
vRGBA[i].A := round(mn);
end;
end;
end; //for c
{$ENDIF}
{$IFDEF COREGL}
BuildDisplayList(f, v, vRGBA, vao, vbo, Clr);
{$ELSE}
displayList:= BuildDisplayList(f, v, vRGBA);
{$ENDIF}
end else begin
Clr.A := 128; //just a bit less than 50% - only for hiding curvature
setLength(vRGBA,0);
{$IFDEF COREGL}
BuildDisplayList(f, v, vRGBA,vao, vbo, Clr);
{$ELSE}
displayList:= BuildDisplayList(f, v, vRGBA);
{$ENDIF}
end;
end; // BuildListCore()
(*procedure FilterAtlas(Clr: TRGBA; maxROI: integer; faces: TFaces; vertices: TVertices; vertexAtlas: TInts; vtxRGBA: TVertexRGBA; atlasHideFilter: TInts; atlasTransparentFilter: TBools; var f: TFaces; var v: TVertices; var vRGBA: TVertexRGBA);
label
123;
var
i, j, nfOK, nvOK, nFace, nVert: integer;
vOK: array of integer;
filterLUT: array of boolean;
fOK: array of boolean;
begin
setlength(v,0);
setlength(f,0);
setlength(vRGBA,0);
nVert := length(vertices);
nFace := length(faces);
if (nVert < 3) or (nFace < 1) or (maxROI < 1) or (length(vertexAtlas) <> nVert) then exit;
if (length(atlasHideFilter) < 1) then begin //everything survives
//atlasTransparentFilter
goto 123;
end;
//set up lookup table - list of regions that survive
setlength(filterLUT, maxROI+1);
for i := 0 to maxROI do
filterLUT[i] := false; //assume we will not filter these regions
for i := 0 to (length(atlasHideFilter) - 1) do
if (atlasHideFilter[i] > 0) and (atlasHideFilter[i] <= maxROI) then
filterLUT[atlasHideFilter[i]] := true; //filter the specified region
//mark surviving vertices
setlength(vOK, nVert);
nvOK := 0;
for i := 0 to (nVert -1) do
if (vertexAtlas[i] > 0) and (not filterLUT[vertexAtlas[i]]) then begin
vOK[i] := nvOK;
nvOK := nvOK + 1;
end else
vOK[i] := -1; //does not survive
setlength(filterLUT, 0);
//conditionals for unusual situations
if nvOK = 0 then begin //nothing survives
setlength(vOK,0);
exit;
end;
if (nvOK = nVert) then begin //everything survives
//BuildListCore(Clr, faces, vertices, vtxRGBA); //show complete array
setlength(vOK,0);
goto 123;
end;
//see how many faces survive
setlength(fOK,nFace);
nfOK := 0;
for i := 0 to (nFace -1) do begin
fOK[i] := (vOK[faces[i].X] >= 0) and (vOK[faces[i].Y] >= 0) and (vOK[faces[i].Z] >= 0);
if fOK[i] then nfOK := nfOK + 1;
end;
//no faces survive
if nvOK = 0 then begin //nothing survives
setlength(vOK,0);
setlength(fOK,0);
exit;
end;
//copy surviving vertices
setlength(v,nvOK);
for i := 0 to (nVert -1) do
if (vOK[i] >= 0) then
v[vOK[i]] := vertices[i];
//copy surviving vertices
setlength(f,nfOK);
j := 0;
for i := 0 to (nFace -1) do
if fOK[i] then begin
f[j].X := vOK[faces[i].X];
f[j].Y := vOK[faces[i].Y];
f[j].Z := vOK[faces[i].Z];
j := j + 1;
end;
//set vertex colors (if loaded)
if length(vtxRGBA) = nVert then begin
setlength(vRGBA, nvOK);
j := 0;
for i := 0 to (nVert -1) do begin
if vOK[i] >= 0 then begin
vRGBA[j] := vtxRGBA[i];
j := j + 1;
end; //if vertex survives
end; //for each vertex
end; //if vertices are colored (vtxRGBA)
setlength(vOK,0);
setlength(fOK,0);
//>> BuildListCore(Clr, f, v, vRGBA);
//release filtered faces, vertices and colors
123:
if (length(v) < 1) then begin //nothing hidden
nVert := length(vertices);
nFace := length(faces);
setlength(f,nFace);
setlength(v,nVert);
setlength(vRGBA,nVert);
f := copy(faces, 0, maxint);
v := copy(vertices, 0, maxint);
vRGBA := copy(vtxRGBA, 0, maxint);
end;
if (length(atlasTransparentFilter)) < 1 then exit;
for i := 0 to (nVert-1) do begin
j := vertexAtlas[i];
if (j < 1) or (j >= length(atlasTransparentFilter)) then continue;
if atlasTransparentFilter[j] then
vtxRGBA[i] := Clr;
end;
end; *)
procedure FilterAtlas(Clr: TRGBA; maxROI: integer; faces: TFaces; vertices: TVertices; vertexAtlas: TInts; vtxRGBA: TVertexRGBA; atlasHideFilter: TInts; atlasTransparentFilter: TBools; var f: TFaces; var v: TVertices; var vRGBA: TVertexRGBA);
var
i, j, nfOK, nvOK, nFace, nVert: integer;
vOK: array of integer;
filterLUT: array of boolean;
fOK: array of boolean;
begin
nVert := length(vertices);
nFace := length(faces);
if (nVert < 3) or (nFace < 1) or (maxROI < 1) or (length(vertexAtlas) <> nVert) then exit;
setlength(f,nFace);
setlength(v,nVert);
setlength(vRGBA,nVert);
f := copy(faces, 0, maxint);
v := copy(vertices, 0, maxint);
vRGBA := copy(vtxRGBA, 0, maxint);
if (length(atlasTransparentFilter) > 0) and (length(vtxRGBA) = nVert) then begin
for i := 0 to (nVert-1) do begin
j := vertexAtlas[i];
if (j < 1) or (j >= length(atlasTransparentFilter)) then continue;
if atlasTransparentFilter[j] then
vRGBA[i] := Clr;
end;
end;
if (length(atlasHideFilter) < 1) then exit;
//set up lookup table - list of regions that survive
setlength(filterLUT, maxROI+1);
for i := 0 to maxROI do
filterLUT[i] := false; //assume we will not filter these regions
for i := 0 to (length(atlasHideFilter) - 1) do
if (atlasHideFilter[i] > 0) and (atlasHideFilter[i] <= maxROI) then
filterLUT[atlasHideFilter[i]] := true; //filter the specified region
//mark surviving vertices
setlength(vOK, nVert);
nvOK := 0;
for i := 0 to (nVert -1) do
if (vertexAtlas[i] > 0) and (not filterLUT[vertexAtlas[i]]) then begin
vOK[i] := nvOK;
nvOK := nvOK + 1;
end else
vOK[i] := -1; //does not survive
setlength(filterLUT, 0);
//conditionals for unusual situations
if nvOK = 0 then begin //nothing survives
setlength(vOK,0);
setlength(f,0);
setlength(v,0);
setlength(vRGBA,0);
exit;
end;
if (nvOK = nVert) then begin //everything survives
//BuildListCore(Clr, faces, vertices, vtxRGBA); //show complete array
setlength(vOK,0);
exit;
end;
//see how many faces survive
setlength(fOK,nFace);
nfOK := 0;
for i := 0 to (nFace -1) do begin
fOK[i] := (vOK[faces[i].X] >= 0) and (vOK[faces[i].Y] >= 0) and (vOK[faces[i].Z] >= 0);
if fOK[i] then nfOK := nfOK + 1;
end;
//no faces survive
if nvOK = 0 then begin //nothing survives
setlength(vOK,0);
setlength(fOK,0);
exit;
end;
//copy surviving vertices
setlength(v,nvOK);
for i := 0 to (nVert -1) do
if (vOK[i] >= 0) then
v[vOK[i]] := vertices[i];
//copy surviving vertices
setlength(f,nfOK);
j := 0;
for i := 0 to (nFace -1) do
if fOK[i] then begin
f[j].X := vOK[faces[i].X];
f[j].Y := vOK[faces[i].Y];
f[j].Z := vOK[faces[i].Z];
j := j + 1;
end;
//set vertex colors (if loaded)
if length(vtxRGBA) = nVert then begin
j := 0;
for i := 0 to (nVert -1) do begin
if vOK[i] >= 0 then begin
vRGBA[j] := vRGBA[i]; //note we read from vRGBA not vtxRGBA to preserve gray vertices
j := j + 1;
end; //if vertex survives
end; //for each vertex
setlength(vRGBA, nvOK);
end; //if vertices are colored (vtxRGBA)
setlength(vOK,0);
setlength(fOK,0);
//>> BuildListCore(Clr, f, v, vRGBA);
//release filtered faces, vertices and colors
end;
procedure TMesh.BuildListPartialAtlas(Clr: TRGBA; vtxRGBA: TVertexRGBA);
var
f: TFaces;
v: TVertices;
vRGBA: TVertexRGBA;
begin
FilterAtlas(Clr, AtlasMaxIndex, faces, vertices, vertexAtlas, vtxRGBA, atlasHideFilter, atlasTransparentFilter, f, v, vRGBA);
if length(v) > 0 then
BuildListCore(Clr, f, v, vRGBA);
setlength(f,0);
setlength(v,0);
setlength(vRGBA,0);
end;
procedure TMesh.BuildList (Clr: TRGBA);
begin
if (length(faces) < 1) or (length(vertices) < 3) then exit;
if ((length(atlasTransparentFilter) > 0) or (length(atlasHideFilter) > 0)) and (length(vertexAtlas) = length(vertices)) then
BuildListPartialAtlas(Clr, vertexRGBA) //hide parts of an overlay atlas
else
BuildListCore(Clr, faces, vertices, vertexRGBA)
end;
procedure TMesh.FilterOverlay(c: integer; var f: TFaces; var v: TVertices; var vRGBA: TVertexRGBA);
//given an overlay where each vertex is a scalar intensity, only preserve vertices that exceed threshold
var
mn, mx: single;
i, j, nfOK, nvOK, nFace, nVert: integer;
vOK: array of integer;
fOK: array of boolean;
rgb, rgba192: TRGBA;
begin
setlength(v,0);
setlength(f,0);
nVert := length(overlay[c].vertices);
nFace := length(overlay[c].faces);
if (overlay[c].atlasMaxIndex > 0) or (overlay[c].LUTvisible = kLUTinvisible) or (nVert < 3) or (nFace < 1) then exit;
if length(overlay[c].intensity) <> nVert then exit; //requires intensity values
if overlay[c].windowScaledMax > overlay[c].windowScaledMin then begin
mn := overlay[c].windowScaledMin;
mx := overlay[c].windowScaledMax;
end else begin
mx := overlay[c].windowScaledMin;
mn := overlay[c].windowScaledMax;
end;
setlength(vOK, nVert);
for i := 0 to (nVert -1) do
vOK[i] := -1; //does not survive
nvOK := 0;
if (mn >= 0) then begin
for i := 0 to (nVert -1) do
if (overlay[c].intensity[i] >= mn) then begin
vOK[i] := nvOK;
nvOK := nvOK + 1;
end;
end else if (mx < 0) then begin
for i := 0 to (nVert -1) do
if (overlay[c].intensity[i] <= mx) then begin
vOK[i] := nvOK;
nvOK := nvOK + 1;
end;
end else //e.g. range -1..+3
nvOK := nVert;
if nvOK = 0 then begin //nothing survives
setlength(vOK,0);
exit;
end;
if (nvOK = nVert) then begin //everything survives
setlength(vOK,0);
setlength(v,nVert);
setlength(f,nFace);
v := overlay[c].vertices;
f := overlay[c].faces;
setlength(vRGBA, nvOK);
rgba192 := overlay[c].LUT[192];
for i := 0 to (nvOK -1) do begin
rgb := inten2rgb(overlay[c].intensity[i], mn, mx, overlay[c].LUT);
vRGBA[i].r := rgb.r;
vRGBA[i].g := rgb.g;
vRGBA[i].b := rgb.b;
vRGBA[i].a := rgba192.a;
end;
exit;
end;
//see how many faces survive
setlength(fOK,nFace);
for i := 0 to (nFace -1) do
fOK[i] := (vOK[overlay[c].faces[i].X] >= 0) and (vOK[overlay[c].faces[i].Y] >= 0) and (vOK[overlay[c].faces[i].Z] >= 0);
nfOK := 0;
for i := 0 to (nFace -1) do
if fOK[i] then nfOK := nfOK + 1;
//copy surviving vertices
setlength(v,nvOK);
for i := 0 to (nVert -1) do
if (vOK[i] >= 0) then
v[vOK[i]] := overlay[c].vertices[i];
//copy surviving vertices
setlength(f,nfOK);
j := 0;
for i := 0 to (nFace -1) do
if fOK[i] then begin
f[j].X := vOK[overlay[c].faces[i].X];
f[j].Y := vOK[overlay[c].faces[i].Y];
f[j].Z := vOK[overlay[c].faces[i].Z];
j := j + 1;
end;
//set RGBA
setlength(vRGBA, nvOK);
rgba192 := overlay[c].LUT[192];
//for i := 0 to (nvOK -1) do
// vRGBA[i] := rgba192;
j := 0;
for i := 0 to (nVert -1) do begin
if vOK[i] >= 0 then begin
rgb := inten2rgb(overlay[c].intensity[i], mn, mx, overlay[c].LUT);
vRGBA[j].r := rgb.r;
vRGBA[j].g := rgb.g;
vRGBA[j].b := rgb.b;
vRGBA[j].a := rgba192.a;
j := j + 1;
end;
end;
setlength(vOK,0);
setlength(fOK,0);
end;
procedure TMesh.BuildListOverlay(Clr: TRGBA);
var
c, i, nVert, nFace, sumFace, sumVert, nMeshOverlay: integer;
isIntensityColored : boolean;
//mn, mx: single;
oFaces, sFaces, fFaces: TFaces;
oVerts, sVerts, fVerts: TVertices;
vRGBA, sRGBA, fRGBA: TVertexRGBA;
//sFaces, sVerts, sRGBA
//rgb: TRGBA;
begin
if (length(faces) < 1) or (length(vertices) < 3) or (OpenOverlays < 1) then
exit;
nMeshOverlay := 0;
for c := 1 to OpenOverlays do
if (overlay[c].LUTvisible <> kLUTinvisible) and (length(overlay[c].vertices) > 2) then
nMeshOverlay := nMeshOverlay + 1;
if nMeshOverlay < 1 then exit;
nMeshOverlay := 0;
sumVert := 0;
sumFace := 0;
for c := 1 to OpenOverlays do begin
nVert := length(overlay[c].vertices);
nFace := length(overlay[c].faces);
if (overlay[c].LUTvisible = kLUTinvisible) or (nVert < 3) or (nFace < 1) then continue;
isIntensityColored := length(overlay[c].intensity) = nVert;
if (not isIntensityColored) then begin
if (length(overlay[c].atlasHideFilter) > 0) or (length(overlay[c].atlasTransparentFilter) > 0) then begin
(*setlength(fFaces,nFace);
setlength(fVerts,nVert);
setlength(fRGBA,nVert);
fFaces := copy(overlay[c].faces, 0, maxint);
fVerts := copy(overlay[c].vertices, 0, maxint);
fRGBA := copy(overlay[c].vertexRGBA, 0, maxint);*)
FilterAtlas(overlay[c].LUT[192], overlay[c].AtlasMaxIndex, overlay[c].faces, overlay[c].vertices, overlay[c].vertexAtlas, overlay[c].vertexRGBA, overlay[c].atlasHideFilter, overlay[c].atlasTransparentFilter, fFaces, fVerts, fRGBA);
nVert := length(fVerts);
nFace := length(fFaces);
if (nVert < 3) or (nFace < 1) then continue;
setlength(oFaces, sumFace + nFace);
for i := 0 to (nFace -1) do
oFaces[i+sumFace] := vectorAdd(fFaces[i], sumVert);
setlength(oVerts, sumVert + nVert);
for i := 0 to (nVert -1) do
oVerts[i+sumVert] := fVerts[i];//fVerts[i]; *)
setlength(vRGBA, sumVert + nVert);
for i := 0 to (nVert -1) do
vRGBA[i+sumVert] := fRGBA[i];
setlength(fFaces,0);
setlength(fVerts,0);
setlength(fRGBA,0);
sumVert := sumVert + nVert;
sumFace := sumFace + nFace;
continue;
end;
setlength(oFaces, sumFace + nFace);
for i := 0 to (nFace -1) do
oFaces[i+sumFace] := vectorAdd(overlay[c].faces[i], sumVert);
setlength(oVerts, sumVert + nVert);
for i := 0 to (nVert -1) do
oVerts[i+sumVert] := overlay[c].vertices[i];
setlength(vRGBA, sumVert + nVert);
for i := 0 to (nVert -1) do
vRGBA[i+sumVert] := overlay[c].LUT[192];
if (length(overlay[c].vertexRGBA) = nVert) then
for i := 0 to (nVert -1) do
vRGBA[i+sumVert] := overlay[c].vertexRGBA[i];
(*if isIntensityColored then begin
if overlay[c].windowScaledMax > overlay[c].windowScaledMin then begin
mn := overlay[c].windowScaledMin;
mx := overlay[c].windowScaledMax;
end else begin
mx := overlay[c].windowScaledMin;
mn := overlay[c].windowScaledMax;
end;
for i := 0 to (nVert -1) do begin
rgb := inten2rgb(overlay[c].intensity[i], mn, mx, overlay[c].LUT);
vRGBA[i+sumVert].r := rgb.r;
vRGBA[i+sumVert].g := rgb.g;
vRGBA[i+sumVert].b := rgb.b;
end;
end;*) //isIntensityColored > 0
sumVert := sumVert + nVert;
sumFace := sumFace + nFace;
continue;
end; // not isIntensityColored
//intensity colored follows
// we will hide vertices below threshold....
FilterOverlay(c, sFaces, sVerts, sRGBA);
nFace := length(sFaces);
nVert := length(sVerts);
//GLForm1.Caption := 'x'+inttostr(nVert)+'y'+inttostr(nFace)+'z'+inttostr(length(sRGBA));
if (nFace < 3) or (nVert < 1) or (length(sRGBA) <> nVert) then begin
setlength(sFaces, 0);
setlength(sVerts, 0);
setlength(sRGBA, 0);
continue;
end;
//GLForm1.Caption := 'xx'+inttostr(nVert)+'y'+inttostr(nFace)+'z'+inttostr(length(sRGBA));
setlength(oFaces, sumFace + nFace);
for i := 0 to (nFace -1) do
oFaces[i+sumFace] := vectorAdd(sFaces[i], sumVert);
setlength(oVerts, sumVert + nVert);
for i := 0 to (nVert -1) do
oVerts[i+sumVert] := sVerts[i];
setlength(vRGBA, sumVert + nVert);
for i := 0 to (nVert -1) do
vRGBA[i+sumVert] := sRGBA[i];
sumVert := sumVert + nVert;
sumFace := sumFace + nFace;
end; //for each overlay
{$IFDEF COREGL}
nFacesOverlay := length(oFaces);
BuildDisplayList(oFaces, oVerts, vRGBA, vaoOverlay, vboOverlay, Clr);
{$ELSE}
displayListOverlay := BuildDisplayList(oFaces, oVerts, vRGBA);
{$ENDIF}
end; // BuildListOverlay()
procedure TMesh.DrawGL (Clr: TRGBA; clipPlane: TPoint4f; isFlipMeshOverlay: boolean);
begin
if (isNode) and (isRebuildList) then
//do NOT exit: we might generate new faces and vertices - e.g nodescale increased from zero
else if (length(faces) < 1) or (length(vertices) < 3) then
exit;
isBusy := true;
if isRebuildList then begin//only if the model has been changed
isRebuildList := false;
if isNode then
Node2Mesh;
{$IFDEF COREGL}
if vao <> 0 then
glDeleteVertexArrays(1,@vao);
if (vbo <> 0) then
glDeleteBuffers(1, @vbo);
if vaoOverlay <> 0 then
glDeleteVertexArrays(1,@vaoOverlay);
if (vboOverlay <> 0) then
glDeleteBuffers(1, @vboOverlay);
vao := 0; vbo := 0; vaoOverlay := 0; vboOverlay := 0;
{$ELSE}
glDeleteLists(displayList, 1);
displayList := 0;
glDeleteLists(displayListOverlay, 1);
displayListOverlay := 0;
{$ENDIF}
BuildList(Clr); //upload geometry as a display list: http://www.songho.ca/opengl/gl_displaylist.html
BuildListOverlay(Clr);
end;
{$IFDEF COREGL}
if (isFlipMeshOverlay) and true then begin
if isVisible then begin
glBindVertexArray(vaoOverlay);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,vboOverlay);
glDrawElements(GL_TRIANGLES, nFacesOverlay* 3, GL_UNSIGNED_INT, nil);
glBindVertexArray(0);
end;
if (vaoOverlay <> 0) and (vboOverlay <> 0) and (nFacesOverlay > 0) then begin
RunOverlayGLSL(clipPlane);
glBindVertexArray(vao);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,vbo);
glDrawElements(GL_TRIANGLES, Length(faces)* 3, GL_UNSIGNED_INT, nil);
glBindVertexArray(0);
end;
end else begin
if isVisible then begin
glBindVertexArray(vao);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,vbo);
glDrawElements(GL_TRIANGLES, Length(faces)* 3, GL_UNSIGNED_INT, nil);
glBindVertexArray(0);
end;
if (vaoOverlay <> 0) and (vboOverlay <> 0) and (nFacesOverlay > 0) then begin
RunOverlayGLSL(clipPlane);
glBindVertexArray(vaoOverlay);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,vboOverlay);
glDrawElements(GL_TRIANGLES, nFacesOverlay * 3, GL_UNSIGNED_INT, nil);
glBindVertexArray(0);
end;
end;
{$ELSE}
if (isFlipMeshOverlay) and (displayListOverlay <> 0) then begin
if isVisible then
glCallList(displayListOverlay);
if (displayListOverlay <> 0) then begin
RunOverlayGLSL(clipPlane);
glCallList(displayList);
end;
end else begin
if isVisible then
glCallList(displayList);
if (displayListOverlay <> 0) then begin
RunOverlayGLSL(clipPlane);
glCallList(displayListOverlay);
end;
end;
{$ENDIF}
isBusy := false;
end; // DrawGL()
procedure TMesh.SwapYZ;
var
swap: TPoint3f;
i : integer;
begin
if (length(vertices) < 1) or (length(faces) < 1) then exit;
for i := 0 to (length(vertices) - 1) do begin
swap.X := vertices[i].X;
swap.Y := -vertices[i].Z;
swap.Z := vertices[i].Y;
vertices[i] := swap;
end;
SetDescriptives;
isRebuildList := true;
end; // SwapYZ()
procedure TMesh.SwapZY;
var
swap: TPoint3f;
i : integer;
begin
if (length(vertices) < 1) or (length(faces) < 1) then exit;
for i := 0 to (length(vertices) - 1) do begin
swap.X := vertices[i].X;
swap.Y := vertices[i].Z;
swap.Z := -vertices[i].Y;
vertices[i] := swap;
end;
SetDescriptives;
isRebuildList := true;
end; // SwapZY()
procedure TMesh.CenterOrigin;
var
i: integer;
begin
if length(vertices) < 1 then begin
showmessage('No mesh is open: unable to center origin');
exit;
end;
vectorNegate(origin);
for i := 0 to (length(vertices) - 1) do
vectorAdd(vertices[i], origin);
setDescriptives;
isRebuildList := true;
isBusy := false;
end; // CenterOrigin()
procedure TMesh.ReverseFaces; //reverse face winding to reverse front and back faces
var
oldFaces : array of TPoint3i;
i: integer;
begin
if (length(faces) < 1) then begin
showmessage('No mesh is open: unable to reverse faces');
exit;
end;
if isBusy then exit;
isBusy := true;
oldFaces := Copy(faces, Low(faces), Length(faces));
for i := 0 to (length(faces)-1) do begin
faces[i].X := oldFaces[i].Z;
faces[i].Z := oldFaces[i].X;
end;
isRebuildList := true;
isBusy := false;
end; // ReverseFaces()
procedure TMesh.SetDescriptives;
var
mn, mx: TPoint3f;
i: integer;
begin
if length(vertices) < 1 then exit;
mx := vertices[0];
mn := mx;
for i := 0 to (length(vertices) - 1) do
minMax(vertices[i], mn, mx);
origin.X := (0.5 * (mx.X - mn.X)) + mn.X;
origin.Y := (0.5 * (mx.Y - mn.Y)) + mn.Y;
origin.Z := (0.5 * (mx.Z - mn.Z)) + mn.Z;
Scale := abs(mx.X - origin.X);
if abs(mx.Y - origin.Y) > Scale then
Scale := abs(mx.Y - origin.Y);
if abs(mx.Z - origin.Z) > Scale then
Scale := abs(mx.Z - origin.Z);
mnV := mn;
mxV := mx;
end; // SetDescriptives()
{$DEFINE SPHERE_BY_SUBDIVIDE} //we can make a sphere via Polyhedra Subdivision or Parametric Surfaces http://prideout.net/blog/?p=44
//with 2 subdivisions we get a sphere with 162 vertices, 320 faces similar to the 15-step sphere that is 286 vertices and 528 faces
//see also http://richardssoftware.net/Home/Post?id=60
{$IFDEF SPHERE_BY_SUBDIVIDE}
// 0,1,2,3 subdivision faces 20, 80, 320, 1280; vertices: 12, 42, 162, 642
function NormMidPoint(a,b: TPoint3f): TPoint3f;
begin
result := a;
vectorAdd(result,b);
vectorNormalize(result);
end; // NormMidPoint()
procedure Subdivide(var verts: TVertices; var faces: TFaces);