// ---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
// ---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma link "GLBaseClasses"
#pragma link "GLS.Cadencer"
#pragma link "GLS.Coordinates"
 
#pragma link "GLS.Material"
#pragma link "GLS.Objects"
#pragma link "GLParticleFX"
#pragma link "GLS.Scene"
#pragma link "GLS.ShadowPlane"
#pragma link "GLS.VectorFileObjects"
#pragma link "GLS.SceneViewer"
#pragma link "GLFileMD3"

#pragma resource "*.dfm"
TForm1 *Form1;

// ---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner) {
}

// ---------------------------------------------------------------------------
void __fastcall TForm1::FormCreate(TObject *Sender) {
	// Build the model
	BuildModel();

	ModelCube->Scale->SetVector(0.044, 0.044, 0.044);

	Legs->AnimationMode = aamLoop;
	Torso->AnimationMode = aamLoop;

	// Populate the combo boxes with the names of the
	// loaded animations
	Legs->Animations->SetToStrings(ComboBox1->Items);
	Torso->Animations->SetToStrings(ComboBox2->Items);

	// Set up some initial animations
	ComboBox1->ItemIndex = ComboBox1->Items->IndexOf("LEGS_IDLE");
	ComboBox2->ItemIndex = ComboBox2->Items->IndexOf("TORSO_STAND");

	// And trigger them
	ComboBox1Change(NULL);
	ComboBox2Change(NULL);
}

// ---------------------------------------------------------------------------
Glvectorgeometry::TMatrix __fastcall TForm1::InterpolateMatrix
	(Glvectorgeometry::TMatrix m1, Glvectorgeometry::TMatrix m2, float delta) {
	int i, j;
	Glvectorgeometry::TMatrix mat;
	// This is used for interpolating between 2 matrices. The result
	// is used to reposition the model parts each frame.
	//
	for (j = 0; j < 3; j++)
		for (i = 0; i < 3; i++)
			mat.V[i].V[j] = m1.V[i].V[j] + (m2.V[i].V[j] - m1.V[i].V[j])
				* delta;
	return mat;
}

// ---------------------------------------------------------------------------
void __fastcall TForm1::BuildModel() {
	// Path to models
	String ModelPath = ExtractFilePath(ParamStr(0));
	int I = ModelPath.Pos("Q3Demo");
	if (I != 0) {
		ModelPath.Delete(I + 7, ModelPath.Length() - I);
		ModelPath += "Model";
		ModelPath = IncludeTrailingBackslash(ModelPath);
		SetCurrentDir(ModelPath);
	}
	// Load model data from MD3 files into the actor
	//
	Legs->LoadFromFile("..\\model\\lower.md3");
	Torso->LoadFromFile("..\\model\\upper.md3");
	Head->LoadFromFile("..\\model\\head.md3");
	Weapon->LoadFromFile("..\\model\\plasma.md3");

	// Load the required tag lists
	// These are used to locally transform the separate
	// parts of the model into the correct places
	//
	LegsTags = new TMD3TagList;
	LegsTags->LoadFromFile("..\\model\\lower.md3");
	TorsoTags = new TMD3TagList;
	TorsoTags->LoadFromFile("..\\model\\upper.md3");

	// The tag_flash tag in the railgun model gives the
	// transform offset for the nozzle of the gun. I've
	// added a GunSmoke dummycube there to demonstrate with
	// a smoke like effect
	//
	WeaponTags = new TMD3TagList;
	WeaponTags->LoadFromFile("..\\model\\plasma.md3");
	GunSmoke->Matrix = WeaponTags->GetTransform("tag_flash", 0);

	// Apply textures to preloaded materials
	// The md3 file loader puts a material into the actors
	// assigned material library (if there is one) with
	// the names of the mesh objects. The skin and/or shader
	// files can tell you which objects need which textures loaded
	//
	LoadQ3Skin("..\\model\\lower_default.skin", Legs);
	LoadQ3Skin("..\\model\\upper_default.skin", Torso);
	LoadQ3Skin("..\\model\\head_default.skin", Head);

	// Load the weapon textures
	//
	MatLib->Materials->GetLibMaterialByName("plasma2")
		->Material->Texture->Image->LoadFromFile("..\\model\\plasma2.jpg");

	// Load the animation data from the cfg file
	// This procedure populates an animation list from a
	// file or TStrings object. The last parameter tells
	// it which class of animation is to be loaded.
	//
	LoadQ3Anims(Legs->Animations, "..\\model\\animation.cfg", "BOTH");
	LoadQ3Anims(Legs->Animations, "..\\model\\animation.cfg", "LEGS");
	LoadQ3Anims(Torso->Animations, "..\\model\\animation.cfg", "BOTH");
	LoadQ3Anims(Torso->Animations, "..\\model\\animation.cfg", "TORSO");
}

// ---------------------------------------------------------------------------

void __fastcall TForm1::ComboBox1Change(TObject *Sender) {
	Legs->SwitchToAnimation(ComboBox1->Text, false);
}

// ---------------------------------------------------------------------------
void __fastcall TForm1::ComboBox2Change(TObject *Sender) {
	Torso->SwitchToAnimation(ComboBox2->Text, false);
}
// ---------------------------------------------------------------------------
void __fastcall TForm1::GLCadencer1Progress(TObject *Sender,
	const double deltaTime, const double newTime) {
	Glvectorgeometry::TMatrix m1;
	Glvectorgeometry::TMatrix m2;

	// Set the transform for the torso
	m1 = LegsTags->GetTransform("tag_torso", Legs->CurrentFrame);
	m2 = LegsTags->GetTransform("tag_torso", Legs->NextFrameIndex());
	Torso->Matrix = InterpolateMatrix(m1, m2, Legs->CurrentFrameDelta);
	Torso->Roll(-TrackBar1->Position);
	Torso->Turn(-TrackBar2->Position);

	// Set the transform for the head
	m1 = TorsoTags->GetTransform("tag_head", Torso->CurrentFrame);
	m2 = TorsoTags->GetTransform("tag_head", Torso->NextFrameIndex());
	Head->Matrix = InterpolateMatrix(m1, m2, Torso->CurrentFrameDelta);
	Head->Roll(-TrackBar3->Position);
	Head->Turn(-TrackBar4->Position);

	// Set the transform for the weapon
	m1 = TorsoTags->GetTransform("tag_weapon", Torso->CurrentFrame);
	m2 = TorsoTags->GetTransform("tag_weapon", Torso->NextFrameIndex());
	Weapon->Matrix = InterpolateMatrix(m1, m2, Torso->CurrentFrameDelta);

	GLSceneViewer1->Invalidate();
}
// ---------------------------------------------------------------------------
void __fastcall TForm1::GLSceneViewer1MouseDown(TObject *Sender,
	TMouseButton Button, TShiftState Shift, int X, int Y) {
	mx = X;
	my = Y;
}

// ---------------------------------------------------------------------------
void __fastcall TForm1::GLSceneViewer1MouseMove(TObject *Sender,
	TShiftState Shift, int X, int Y) {
	if (Shift.Contains(ssLeft))
		GLCamera1->MoveAroundTarget(my - Y, mx - X);
	if (Shift.Contains(ssRight))
		GLCamera1->AdjustDistanceToTarget(Power(1.05, my - Y));
	mx = X;
	my = Y;
}

// ---------------------------------------------------------------------------
void __fastcall TForm1::Timer1Timer(TObject *Sender) {
	Caption = "Quake Actor " + Format("%.1f FPS",
		ARRAYOFCONST((GLSceneViewer1->FramesPerSecond())));
	GLSceneViewer1->ResetPerformanceMonitor();
}
// ---------------------------------------------------------------------------
void __fastcall TForm1::ComboSkinChange(TObject *Sender) {
	switch (ComboSkin->ItemIndex) {
	case 0: {
			LoadQ3Skin("..\\model\\lower_default.skin", Legs);
			LoadQ3Skin("..\\model\\upper_default.skin", Torso);
			LoadQ3Skin("..\\model\\head_default.skin", Head);
			break;
		}
	case 1: {
			LoadQ3Skin("..\\model\\lower_red.skin", Legs);
			LoadQ3Skin("..\\model\\upper_red.skin", Torso);
			LoadQ3Skin("..\\model\\head_red.skin", Head);
			break;
		}
	case 2: {
			LoadQ3Skin("..\\model\\lower_blue.skin", Legs);
			LoadQ3Skin("..\\model\\upper_blue.skin", Torso);
			LoadQ3Skin("..\\model\\head_blue.skin", Head);
			break;
		}
	default: ;
	}
}
// ---------------------------------------------------------------------------

void __fastcall TForm1::FormDestroy(TObject *Sender) {
	LegsTags->Free();
	TorsoTags->Free();
	WeaponTags->Free();
}
// ---------------------------------------------------------------------------