gameprogcpp · chalonverse · Dec 21, 2017 · Dec 20, 2017 · Dec 21, 2017 · Dec 21, 2017
diff --git a/Chapter07/Game.cpp b/Chapter07/Game.cpp
@@ -19,6 +19,7 @@
 
 Game::Game()
 :mRenderer(nullptr)
+,mAudioSystem(nullptr)
 ,mIsRunning(true)
 ,mUpdatingActors(false)
 {

diff --git a/Chapter09/Game.cpp b/Chapter09/Game.cpp
@@ -22,6 +22,7 @@
 
 Game::Game()
 :mRenderer(nullptr)
+,mAudioSystem(nullptr)
 ,mIsRunning(true)
 ,mUpdatingActors(false)
 {

diff --git a/Chapter09/Renderer.cpp b/Chapter09/Renderer.cpp
@@ -324,3 +324,16 @@ Vector3 Renderer::Unproject(const Vector3& screenPoint) const
 	unprojection.Invert();
 	return Vector3::TransformWithPerspDiv(deviceCoord, unprojection);
 }
+
+void Renderer::GetScreenDirection(Vector3& outStart, Vector3& outDir) const
+{
+	// Get start point (in center of screen on near plane)
+	Vector3 screenPoint(0.0f, 0.0f, 0.0f);
+	outStart = Unproject(screenPoint);
+	// Get end point (in center of screen, between near and far)
+	screenPoint.z = 0.9f;
+	Vector3 end = Unproject(screenPoint);
+	// Get direction vector
+	outDir = end - outStart;
+	outDir.Normalize();
+}
diff --git a/Chapter09/Renderer.h b/Chapter09/Renderer.h
@@ -56,6 +56,7 @@ class Renderer
 	// y = [-screenHeight/2, +screenHeight/2]
 	// z = [0, 1) -- 0 is closer to camera, 1 is further
 	Vector3 Unproject(const Vector3& screenPoint) const;
+	void GetScreenDirection(Vector3& outStart, Vector3& outDir) const;
 	float GetScreenWidth() const { return mScreenWidth; }
 	float GetScreenHeight() const { return mScreenHeight; }
 private:

diff --git a/Chapter10/Actor.cpp b/Chapter10/Actor.cpp
@@ -0,0 +1,149 @@
+// ----------------------------------------------------------------
+// From Game Programming in C++ by Sanjay Madhav
+// Copyright (C) 2017 Sanjay Madhav. All rights reserved.
+// 
+// Released under the BSD License
+// See LICENSE in root directory for full details.
+// ----------------------------------------------------------------
+
+#include "Actor.h"
+#include "Game.h"
+#include "Component.h"
+#include <algorithm>
+
+Actor::Actor(Game* game)
+	:mState(EActive)
+	,mPosition(Vector3::Zero)
+	,mRotation(Quaternion::Identity)
+	,mScale(1.0f)
+	,mGame(game)
+	,mRecomputeWorldTransform(true)
+{
+	mGame->AddActor(this);
+}
+
+Actor::~Actor()
+{
+	mGame->RemoveActor(this);
+	// Need to delete components
+	// Because ~Component calls RemoveComponent, need a different style loop
+	while (!mComponents.empty())
+	{
+		delete mComponents.back();
+	}
+}
+
+void Actor::Update(float deltaTime)
+{
+	if (mState == EActive)
+	{
+		ComputeWorldTransform();
+
+		UpdateComponents(deltaTime);
+		UpdateActor(deltaTime);
+
+		ComputeWorldTransform();
+	}
+}
+
+void Actor::UpdateComponents(float deltaTime)
+{
+	for (auto comp : mComponents)
+	{
+		comp->Update(deltaTime);
+	}
+}
+
+void Actor::UpdateActor(float deltaTime)
+{
+}
+
+void Actor::ProcessInput(const uint8_t* keyState)
+{
+	if (mState == EActive)
+	{
+		// First process input for components
+		for (auto comp : mComponents)
+		{
+			comp->ProcessInput(keyState);
+		}
+
+		ActorInput(keyState);
+	}
+}
+
+void Actor::ActorInput(const uint8_t* keyState)
+{
+
+}
+
+void Actor::RotateToNewForward(const Vector3& forward)
+{
+	// Figure out difference between original (unit x) and new
+	float dot = Vector3::Dot(Vector3::UnitX, forward);
+	float angle = Math::Acos(dot);
+	// Facing down X
+	if (dot > 0.9999f)
+	{
+		SetRotation(Quaternion::Identity);
+	}
+	// Facing down -X
+	else if (dot < -0.9999f)
+	{
+		SetRotation(Quaternion(Vector3::UnitZ, Math::Pi));
+	}
+	else
+	{
+		// Rotate about axis from cross product
+		Vector3 axis = Vector3::Cross(Vector3::UnitX, forward);
+		axis.Normalize();
+		SetRotation(Quaternion(axis, angle));
+	}
+}
+
+void Actor::ComputeWorldTransform()
+{
+	if (mRecomputeWorldTransform)
+	{
+		mRecomputeWorldTransform = false;
+		// Scale, then rotate, then translate
+		mWorldTransform = Matrix4::CreateScale(mScale);
+		mWorldTransform *= Matrix4::CreateFromQuaternion(mRotation);
+		mWorldTransform *= Matrix4::CreateTranslation(mPosition);
+
+		// Inform components world transform updated
+		for (auto comp : mComponents)
+		{
+			comp->OnUpdateWorldTransform();
+		}
+	}
+}
+
+void Actor::AddComponent(Component* component)
+{
+	// Find the insertion point in the sorted vector
+	// (The first element with a order higher than me)
+	int myOrder = component->GetUpdateOrder();
+	auto iter = mComponents.begin();
+	for (;
+		iter != mComponents.end();
+		++iter)
+	{
+		if (myOrder < (*iter)->GetUpdateOrder())
+		{
+			break;
+		}
+	}
+
+	// Inserts element before position of iterator
+	mComponents.insert(iter, component);
+}
+
+void Actor::RemoveComponent(Component* component)
+{
+	auto iter = std::find(mComponents.begin(), mComponents.end(), component);
+	if (iter != mComponents.end())
+	{
+		mComponents.erase(iter);
+	}
+}
diff --git a/Chapter10/Actor.h b/Chapter10/Actor.h
@@ -0,0 +1,77 @@
+// ----------------------------------------------------------------
+// From Game Programming in C++ by Sanjay Madhav
+// Copyright (C) 2017 Sanjay Madhav. All rights reserved.
+// 
+// Released under the BSD License
+// See LICENSE in root directory for full details.
+// ----------------------------------------------------------------
+
+#pragma once
+#include <vector>
+#include "Math.h"
+#include <cstdint>
+
+class Actor
+{
+public:
+	enum State
+	{
+		EActive,
+		EPaused,
+		EDead
+	};
+
+	Actor(class Game* game);
+	virtual ~Actor();
+
+	// Update function called from Game (not overridable)
+	void Update(float deltaTime);
+	// Updates all the components attached to the actor (not overridable)
+	void UpdateComponents(float deltaTime);
+	// Any actor-specific update code (overridable)
+	virtual void UpdateActor(float deltaTime);
+
+	// ProcessInput function called from Game (not overridable)
+	void ProcessInput(const uint8_t* keyState);
+	// Any actor-specific input code (overridable)
+	virtual void ActorInput(const uint8_t* keyState);
+
+	// Getters/setters
+	const Vector3& GetPosition() const { return mPosition; }
+	void SetPosition(const Vector3& pos) { mPosition = pos; mRecomputeWorldTransform = true; }
+	float GetScale() const { return mScale; }
+	void SetScale(float scale) { mScale = scale;  mRecomputeWorldTransform = true; }
+	const Quaternion& GetRotation() const { return mRotation; }
+	void SetRotation(const Quaternion& rotation) { mRotation = rotation;  mRecomputeWorldTransform = true; }
+
+	void ComputeWorldTransform();
+	const Matrix4& GetWorldTransform() const { return mWorldTransform; }
+
+	Vector3 GetForward() const { return Vector3::Transform(Vector3::UnitX, mRotation); }
+	Vector3 GetRight() const { return Vector3::Transform(Vector3::UnitY, mRotation); }
+
+	void RotateToNewForward(const Vector3& forward);
+
+	State GetState() const { return mState; }
+	void SetState(State state) { mState = state; }
+
+	class Game* GetGame() { return mGame; }
+
+
+	// Add/remove components
+	void AddComponent(class Component* component);
+	void RemoveComponent(class Component* component);
+private:
+	// Actor's state
+	State mState;
+
+	// Transform
+	Matrix4 mWorldTransform;
+	Vector3 mPosition;
+	Quaternion mRotation;
+	float mScale;
+	bool mRecomputeWorldTransform;
+
+	std::vector<class Component*> mComponents;
+	class Game* mGame;
+};
diff --git a/Chapter10/Assets/Crosshair.png b/Chapter10/Assets/Crosshair.png
diff --git a/Chapter10/Assets/Cube.gpmesh b/Chapter10/Assets/Cube.gpmesh
@@ -0,0 +1,53 @@
+{
+	"version":1,
+	"vertexformat":"PosNormTex",
+	"shader":"BasicMesh",
+	"textures":[
+		"Assets/Cube.png"
+	],
+	"specularPower":100.0,
+	"vertices":[
+		[-0.5,-0.5,-0.5,0,0,-1,0,0],
+		[0.5,-0.5,-0.5,0,0,-1,1,0],
+		[-0.5,0.5,-0.5,0,0,-1,0,-1],
+		[0.5,0.5,-0.5,0,0,-1,1,-1],
+		[-0.5,0.5,0.5,0,1,0,0,-1],
+		[0.5,0.5,0.5,0,1,0,1,-1],
+		[-0.5,-0.5,0.5,0,0,1,0,0],
+		[0.5,-0.5,0.5,0,0,1,1,0],
+		[-0.5,0.5,-0.5,0,0,-1,0,-1],
+		[0.5,-0.5,-0.5,0,0,-1,1,0],
+		[-0.5,0.5,-0.5,0,1,0,0,-1],
+		[0.5,0.5,-0.5,0,1,0,1,-1],
+		[-0.5,0.5,0.5,0,1,0,0,-1],
+		[-0.5,0.5,0.5,0,0,1,0,-1],
+		[0.5,0.5,0.5,0,0,1,1,-1],
+		[-0.5,-0.5,0.5,0,0,1,0,0],
+		[-0.5,-0.5,0.5,0,-1,0,0,0],
+		[0.5,-0.5,0.5,0,-1,0,1,0],
+		[-0.5,-0.5,-0.5,0,-1,0,0,0],
+		[0.5,-0.5,-0.5,0,-1,0,1,0],
+		[0.5,-0.5,-0.5,1,0,0,1,0],
+		[0.5,-0.5,0.5,1,0,0,1,0],
+		[0.5,0.5,-0.5,1,0,0,1,-1],
+		[0.5,0.5,0.5,1,0,0,1,-1],
+		[-0.5,-0.5,0.5,-1,0,0,0,0],
+		[-0.5,-0.5,-0.5,-1,0,0,0,0],
+		[-0.5,0.5,0.5,-1,0,0,0,-1],
+		[-0.5,0.5,-0.5,-1,0,0,0,-1]
+	],
+	"indices":[
+		[2,1,0],
+		[3,9,8],
+		[4,11,10],
+		[5,11,12],
+		[6,14,13],
+		[7,14,15],
+		[18,17,16],
+		[19,17,18],
+		[22,21,20],
+		[23,21,22],
+		[26,25,24],
+		[27,25,26]
+	]
+}
diff --git a/Chapter10/Assets/Cube.png b/Chapter10/Assets/Cube.png
diff --git a/Chapter10/Assets/Default.png b/Chapter10/Assets/Default.png
diff --git a/Chapter10/Assets/HealthBar.png b/Chapter10/Assets/HealthBar.png
diff --git a/Chapter10/Assets/LICENSE.txt b/Chapter10/Assets/LICENSE.txt
@@ -0,0 +1 @@
+Racing Car by Willy Decarpentrie, licensed under CC Attribution and downloaded from https://sketchfab.com
diff --git a/Chapter10/Assets/Master Bank.bank b/Chapter10/Assets/Master Bank.bank
diff --git a/Chapter10/Assets/Master Bank.strings.bank b/Chapter10/Assets/Master Bank.strings.bank
diff --git a/Chapter10/Assets/Plane.gpmesh b/Chapter10/Assets/Plane.gpmesh
@@ -0,0 +1,70 @@
+{
+	"version":1,
+	"vertexformat":"PosNormTex",
+	"shader":"BasicMesh",
+	"textures":[
+		"Assets/Plane.png"
+	],
+	"specularPower":100.0,
+	"vertices":[
+		[50.000000,50.000000,-0.000000,-0.003922,-0.003922,1.000000,1.000000,1.000000],
+		[50.000000,25.000000,-0.000000,-0.003922,-0.003922,1.000000,1.000000,0.750000],
+		[25.000000,50.000000,-0.000000,-0.003922,-0.003922,1.000000,0.750000,1.000000],
+		[25.000000,25.000000,-0.000000,-0.003922,-0.003922,1.000000,0.750000,0.750000],
+		[0.000000,50.000000,-0.000000,-0.003922,-0.003922,1.000000,0.500000,1.000000],
+		[50.000000,-0.000000,0.000000,-0.003922,-0.003922,1.000000,1.000000,0.500000],
+		[0.000000,25.000000,-0.000000,-0.003922,-0.003922,1.000000,0.500000,0.750000],
+		[-25.000000,50.000000,-0.000000,-0.003922,-0.003922,1.000000,0.250000,1.000000],
+		[25.000000,-0.000000,0.000000,-0.003922,-0.003922,1.000000,0.750000,0.500000],
+		[50.000000,-25.000000,0.000000,-0.003922,-0.003922,1.000000,1.000000,0.250000],
+		[-25.000000,25.000000,-0.000000,-0.003922,-0.003922,1.000000,0.250000,0.750000],
+		[-50.000000,50.000000,-0.000000,-0.003922,-0.003922,1.000000,0.000000,1.000000],
+		[-50.000000,25.000000,-0.000000,-0.003922,-0.003922,1.000000,0.000000,0.750000],
+		[0.000000,-0.000000,0.000000,-0.003922,-0.003922,1.000000,0.500000,0.500000],
+		[25.000000,-25.000000,0.000000,-0.003922,-0.003922,1.000000,0.750000,0.250000],
+		[50.000000,-50.000000,0.000000,-0.003922,-0.003922,1.000000,1.000000,0.000000],
+		[25.000000,-50.000000,0.000000,-0.003922,-0.003922,1.000000,0.750000,0.000000],
+		[-25.000000,-0.000000,0.000000,-0.003922,-0.003922,1.000000,0.250000,0.500000],
+		[-50.000000,-0.000000,0.000000,-0.003922,-0.003922,1.000000,0.000000,0.500000],
+		[0.000000,-25.000000,0.000000,-0.003922,-0.003922,1.000000,0.500000,0.250000],
+		[0.000000,-50.000000,0.000000,-0.003922,-0.003922,1.000000,0.500000,0.000000],
+		[-25.000000,-25.000000,0.000000,-0.003922,-0.003922,1.000000,0.250000,0.250000],
+		[-50.000000,-25.000000,0.000000,-0.003922,-0.003922,1.000000,0.000000,0.250000],
+		[-25.000000,-50.000000,0.000000,-0.003922,-0.003922,1.000000,0.250000,0.000000],
+		[-50.000000,-50.000000,0.000000,-0.003922,-0.003922,1.000000,0.000000,0.000000]
+	],
+	"indices":[
+		[0,1,2],
+		[3,2,1],
+		[2,3,4],
+		[1,5,3],
+		[6,4,3],
+		[4,6,7],
+		[8,3,5],
+		[3,8,6],
+		[5,9,8],
+		[10,7,6],
+		[7,10,11],
+		[12,11,10],
+		[13,6,8],
+		[6,13,10],
+		[14,8,9],
+		[8,14,13],
+		[9,15,14],
+		[16,14,15],
+		[10,17,12],
+		[17,10,13],
+		[18,12,17],
+		[19,13,14],
+		[14,16,19],
+		[13,19,17],
+		[20,19,16],
+		[17,21,18],
+		[21,17,19],
+		[19,20,21],
+		[22,18,21],
+		[23,21,20],
+		[21,23,22],
+		[24,22,23]
+	]
+}
diff --git a/Chapter10/Assets/Plane.png b/Chapter10/Assets/Plane.png
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		Racing Car by Willy Decarpentrie, licensed under CC Attribution and downloaded from https://sketchfab.com