unit uLandGenTemplateBased;
interface

uses uLandTemplates;

procedure GenTemplated(var Template: TEdgeTemplate);

implementation
uses uTypes, uVariables, uConsts, uFloat, uLandOutline, uLandUtils, uRandom;


procedure SetPoints(var Template: TEdgeTemplate; var pa: TPixAr; fps: PPointArray);
var i: LongInt;
begin
    with Template do
        begin
        pa.Count:= BasePointsCount;
        for i:= 0 to pred(pa.Count) do
            begin
            pa.ar[i].x:= BasePoints^[i].x + LongInt(GetRandom(BasePoints^[i].w));
            if pa.ar[i].x <> NTPX then
            pa.ar[i].x:= pa.ar[i].x + ((LAND_WIDTH - Template.TemplateWidth) div 2);
            pa.ar[i].y:= BasePoints^[i].y + LongInt(GetRandom(BasePoints^[i].h)) + LAND_HEIGHT - LongInt(Template.TemplateHeight)
            end;

        if canMirror then
            if getrandom(2) = 0 then
                begin
                for i:= 0 to pred(BasePointsCount) do
                if pa.ar[i].x <> NTPX then
                    pa.ar[i].x:= LAND_WIDTH - 1 - pa.ar[i].x;
                for i:= 0 to pred(FillPointsCount) do
                    fps^[i].x:= LAND_WIDTH - 1 - fps^[i].x;
                end;

(*  Experiment in making this option more useful
     if ((not isNegative) and (cTemplateFilter = 4)) or
        (canFlip and (getrandom(2) = 0)) then
           begin
           for i:= 0 to pred(BasePointsCount) do
               begin
               pa.ar[i].y:= LAND_HEIGHT - 1 - pa.ar[i].y + (LAND_HEIGHT - TemplateHeight) * 2;
               if pa.ar[i].y > LAND_HEIGHT - 1 then
                   pa.ar[i].y:= LAND_HEIGHT - 1;
               end;
           for i:= 0 to pred(FillPointsCount) do
               begin
               FillPoints^[i].y:= LAND_HEIGHT - 1 - FillPoints^[i].y + (LAND_HEIGHT - TemplateHeight) * 2;
               if FillPoints^[i].y > LAND_HEIGHT - 1 then
                   FillPoints^[i].y:= LAND_HEIGHT - 1;
               end;
           end;
     end
*)
// template recycling.  Pull these off the floor a bit
    if (not isNegative) and (cTemplateFilter = 4) then
        begin
        for i:= 0 to pred(BasePointsCount) do
            begin
            dec(pa.ar[i].y, 100);
            if pa.ar[i].y < 0 then
                pa.ar[i].y:= 0;
            end;
        for i:= 0 to pred(FillPointsCount) do
            begin
            dec(fps^[i].y, 100);
            if fps^[i].y < 0 then
                fps^[i].y:= 0;
            end;
        end;

    if (canFlip and (getrandom(2) = 0)) then
        begin
        for i:= 0 to pred(BasePointsCount) do
            pa.ar[i].y:= LAND_HEIGHT - 1 - pa.ar[i].y;
        for i:= 0 to pred(FillPointsCount) do
            fps^[i].y:= LAND_HEIGHT - 1 - fps^[i].y;
        end;
    end
end;
    
procedure GenTemplated(var Template: TEdgeTemplate);
var pa: TPixAr;
    i: Longword;
    y, x: Longword;
    fps: TPointArray;
begin
    fps:=Template.FillPoints^;
    ResizeLand(Template.TemplateWidth, Template.TemplateHeight);
    for y:= 0 to LAND_HEIGHT - 1 do
        for x:= 0 to LAND_WIDTH - 1 do
            Land[y, x]:= lfBasic;
    {$HINTS OFF}
    SetPoints(Template, pa, @fps);
    {$HINTS ON}
    
    for i:= 1 to Template.BezierizeCount do
        begin
        BezierizeEdge(pa, _0_5);
        RandomizePoints(pa);
        RandomizePoints(pa)
        end;
    for i:= 1 to Template.RandPassesCount do
        RandomizePoints(pa);
    BezierizeEdge(pa, _0_1);


    DrawEdge(pa, 0);

    with Template do
        for i:= 0 to pred(FillPointsCount) do
            with fps[i] do
                FillLand(x, y, 0, 0);

    DrawEdge(pa, lfBasic);

    MaxHedgehogs:= Template.MaxHedgehogs;
    hasGirders:= Template.hasGirders;
    playHeight:= Template.TemplateHeight;
    playWidth:= Template.TemplateWidth;
    leftX:= ((LAND_WIDTH - playWidth) div 2);
    rightX:= (playWidth + ((LAND_WIDTH - playWidth) div 2)) - 1;
    topY:= LAND_HEIGHT - playHeight;

    // HACK: force to only cavern even if a cavern map is invertable if cTemplateFilter = 4 ?
    if (cTemplateFilter = 4)
    or (Template.canInvert and (getrandom(2) = 0))
    or (not Template.canInvert and Template.isNegative) then
        begin
        hasBorder:= true;
        for y:= 0 to LAND_HEIGHT - 1 do
            for x:= 0 to LAND_WIDTH - 1 do
                if (y < topY) or (x < leftX) or (x > rightX) then
                    Land[y, x]:= 0
                else
                    begin
                    if Land[y, x] = 0 then
                        Land[y, x]:= lfBasic
                    else if Land[y, x] = lfBasic then
                        Land[y, x]:= 0;
                    end;
        end;
end;


end.