unit uutlMcfHelper;

{$mode objfpc}{$H+}

interface

uses
  ugluMatrix, ugluVector, uutlMCF, uglcLight;

procedure utlWriteMatrix4f(const aSection: TutlMCFSection; const aMatrix: TgluMatrix4f);
function utlReadMatrix4f(const aSection: TutlMCFSection): TgluMatrix4f;
procedure utlWriteMaterial(const aSection: TutlMCFSection; const aMaterial: TglcMaterialRec);
function utlReadMaterial(const aSection: TutlMCFSection): TglcMaterialRec;
procedure utlWriteLight(const aSection: TutlMCFSection; const aLight: TglcLightRec);
function utlReadLight(const aSection: TutlMCFSection): TglcLightRec;

implementation

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
procedure utlWriteMatrix4f(const aSection: TutlMCFSection; const aMatrix: TgluMatrix4f);
begin
  with aSection do begin
    SetString('AxisX', gluVector4fToStr(aMatrix[maAxisX]));
    SetString('AxisY', gluVector4fToStr(aMatrix[maAxisY]));
    SetString('AxisZ', gluVector4fToStr(aMatrix[maAxisZ]));
    SetString('Pos',   gluVector4fToStr(aMatrix[maPos]));
  end;
end;

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
function utlReadMatrix4f(const aSection: TutlMCFSection): TgluMatrix4f;
begin
  with aSection do begin
    result[maAxisX] := gluStrToVector4f(GetString('AxisX', '1; 0; 0; 0;'));
    result[maAxisY] := gluStrToVector4f(GetString('AxisY', '0; 1; 0; 0;'));
    result[maAxisZ] := gluStrToVector4f(GetString('AxisZ', '0; 0; 1; 0;'));
    result[maPos]   := gluStrToVector4f(GetString('Pos',   '0; 0; 0; 1;'));
  end;
end;

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
procedure utlWriteMaterial(const aSection: TutlMCFSection; const aMaterial: TglcMaterialRec);
begin
  with aSection do begin
    SetString('Ambient',   gluVector4fToStr(aMaterial.Ambient));
    SetString('Diffuse',   gluVector4fToStr(aMaterial.Diffuse));
    SetString('Specular',  gluVector4fToStr(aMaterial.Specular));
    SetString('Emission',  gluVector4fToStr(aMaterial.Emission));
    SetFloat ('Shininess', aMaterial.Shininess);
  end;
end;

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
function utlReadMaterial(const aSection: TutlMCFSection): TglcMaterialRec;
begin
  with aSection do begin
    result.Ambient   := gluStrToVector4f(GetString('Ambient',  gluVector4fToStr(MAT_DEFAULT_AMBIENT)));
    result.Diffuse   := gluStrToVector4f(GetString('Diffuse',  gluVector4fToStr(MAT_DEFAULT_DIFFUSE)));
    result.Specular  := gluStrToVector4f(GetString('Specular', gluVector4fToStr(MAT_DEFAULT_SPECULAR)));
    result.Emission  := gluStrToVector4f(GetString('Emission', gluVector4fToStr(MAT_DEFAULT_EMISSION)));
    result.Shininess := GetFloat('Shininess', MAT_DEFAULT_SHININESS);
  end;
end;

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
procedure utlWriteLight(const aSection: TutlMCFSection; const aLight: TglcLightRec);
begin
  with aSection do begin
    SetString('Ambient',       gluVector4fToStr(aLight.Ambient));
    SetString('Diffuse',       gluVector4fToStr(aLight.Diffuse));
    SetString('Specular',      gluVector4fToStr(aLight.Specular));
    SetString('Position',      gluVector4fToStr(aLight.Position));
    SetString('SpotDirection', gluVector3fToStr(aLight.SpotDirection));
    SetFloat ('SpotExponent',  aLight.SpotExponent);
    SetFloat ('SpotCutoff',    aLight.SpotCutoff);
    SetFloat ('ConstantAtt',   aLight.ConstantAtt);
    SetFloat ('LinearAtt',     aLight.LinearAtt);
    SetFloat ('QuadraticAtt',  aLight.QuadraticAtt);
  end;
end;

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
function utlReadLight(const aSection: TutlMCFSection): TglcLightRec;
begin
  with aSection do begin
    result.Ambient       := gluStrToVector4f(GetString('Ambient',       gluVector4fToStr(LIGHT_DEFAULT_AMBIENT)));
    result.Diffuse       := gluStrToVector4f(GetString('Diffuse',       gluVector4fToStr(LIGHT_DEFAULT_DIFFUSE)));
    result.Specular      := gluStrToVector4f(GetString('Specular',      gluVector4fToStr(LIGHT_DEFAULT_SPECULAR)));
    result.Position      := gluStrToVector4f(GetString('Position',      gluVector4fToStr(LIGHT_DEFAULT_POSITION)));
    result.SpotDirection := gluStrToVector3f(GetString('SpotDirection', gluVector3fToStr(LIGHT_DEFAULT_SPOT_DIRECTION)));
    result.SpotExponent  := GetFloat ('SpotExponent',  LIGHT_DEFAULT_SPOT_EXPONENT);
    result.SpotCutoff    := GetFloat ('SpotCutoff',    LIGHT_DEFAULT_SPOT_CUTOFF);
    result.ConstantAtt   := GetFloat ('ConstantAtt',   LIGHT_DEFAULT_CONSTANT_ATT);
    result.LinearAtt     := GetFloat ('LinearAtt',     LIGHT_DEFAULT_LINEAR_ATT);
    result.QuadraticAtt  := GetFloat ('QuadraticAtt',  LIGHT_DEFAULT_QUADRATIC_ATT);
  end;
end;

end.