Shooter example split into multiple files

ShooterExample/Bullet.cpp

@@ -0,0 +1,20 @@
+#include "Bullet.h"
+
+Bullet::Bullet(olc::vi2d pos)
+	:pos(pos){}
+olc::vf2d Bullet::GetPos(){
+	return pos;
+}
+void Bullet::Update(float fElapsedTime){
+	pos+={0,-72*fElapsedTime};
+}
+bool Bullet::CollidesWith(Enemy&enemy){
+	float dist2=pow(enemy.GetPos().x+enemy.GetSprSize().x-pos.x,2)+pow(enemy.GetPos().y+enemy.GetSprSize().y-pos.y,2);
+	return dist2<64;
+}
+void Bullet::KillBullet(){
+	alive=false;
+}
+bool Bullet::IsAlive(){
+	return alive||pos.y<0;
+}

ShooterExample/Bullet.h

@@ -0,0 +1,15 @@
+#pragma once
+#include "olcPixelGameEngine.h"
+#include "Enemy.h"
+
+class Bullet{
+	olc::vf2d pos;
+	bool alive=true;
+public:
+	Bullet(olc::vi2d pos);
+	olc::vf2d GetPos();
+	void Update(float fElapsedTime);
+	bool CollidesWith(Enemy&enemy);
+	void KillBullet();
+	bool IsAlive();
+};

ShooterExample/Enemy.cpp

@@ -0,0 +1,29 @@
+#include "Enemy.h"
+
+Enemy::Enemy(olc::vi2d pos,Rect*sprite,int health)
+	:pos(pos),sprite(sprite),health(health){};
+olc::vf2d Enemy::GetPos(){
+	return pos;	
+}
+olc::vi2d Enemy::GetSprPos(){
+	return sprite->GetPos();	
+}
+olc::vi2d Enemy::GetSprSize(){
+	return sprite->GetSize();	
+}
+void Enemy::Hurt(int damage){
+	health-=damage;
+}
+bool Enemy::IsAlive(){
+	return health>0;
+}
+void Enemy::Move(olc::vi2d moveAmt){
+	pos+=moveAmt;
+}
+olc::Pixel Enemy::GetColor(){
+	if(health>1){
+		return {255,96,96};
+	} else {
+		return olc::GREEN;
+	}
+}

ShooterExample/Enemy.h

@@ -0,0 +1,18 @@
+#pragma once
+#include "Rect.h"
+#include "olcPixelGameEngine.h"
+
+class Enemy{
+	olc::vf2d pos;
+	Rect*sprite;
+	int health;
+public:
+	Enemy(olc::vi2d pos,Rect*sprite,int health=1);
+	olc::vf2d GetPos();
+	olc::vi2d GetSprPos();
+	olc::vi2d GetSprSize();
+	void Hurt(int damage=1);
+	bool IsAlive();
+	void Move(olc::vi2d moveAmt);
+	olc::Pixel GetColor();
+};

ShooterExample/Player.cpp

@@ -0,0 +1,25 @@
+#include "Player.h"
+
+Player::Player(olc::vi2d pos,Rect*sprite)
+	:pos(pos),sprite(sprite){}
+olc::vf2d Player::GetPos(){
+	return pos;
+}
+olc::vi2d Player::GetSprPos(){
+	return sprite->GetPos();	
+}
+olc::vi2d Player::GetSprSize(){
+	return sprite->GetSize();	
+}
+void Player::Update(float fElapsedTime){
+	lastShootTime=std::max(lastShootTime-fElapsedTime,0.f);
+}
+bool Player::CanShoot(){
+	return lastShootTime==0;
+}
+void Player::OnShoot(){
+	lastShootTime=0.5;
+}
+void Player::Move(olc::vf2d moveAmt){
+	pos+=moveAmt;
+}

ShooterExample/Player.h

@@ -0,0 +1,18 @@
+#pragma once
+#include "olcPixelGameEngine.h"
+#include "Rect.h"
+
+class Player{
+	olc::vf2d pos;
+	Rect*sprite;
+	float lastShootTime=0;
+public:
+	Player(olc::vi2d pos,Rect*sprite);
+	olc::vf2d GetPos();
+	olc::vi2d GetSprPos();
+	olc::vi2d GetSprSize();
+	void Update(float fElapsedTime);
+	bool CanShoot();
+	void OnShoot();
+	void Move(olc::vf2d moveAmt);
+};

ShooterExample/Rect.cpp

@@ -0,0 +1,13 @@
+#include "olcPixelGameEngine.h"
+#include "Rect.h"
+
+Rect::Rect(int x,int y,int w, int h)
+	:x(x),y(y),w(w),h(h){}
+
+olc::vi2d Rect::GetPos(){
+	return {x,y};
+}
+
+olc::vi2d Rect::GetSize(){
+	return {w,h};
+}

ShooterExample/Rect.h

@@ -0,0 +1,11 @@
+#pragma once
+#include "olcPixelGameEngine.h"
+
+struct Rect{
+private:
+	int x,y,w,h;
+public:
+	Rect(int x,int y,int w, int h);
+	olc::vi2d GetPos();
+	olc::vi2d GetSize();
+};

ShooterExample/ShooterExample.cpp

@@ -1,97 +1,10 @@
 #define OLC_PGE_APPLICATION
 #include "olcPixelGameEngine.h"
 
-struct Rect{
+#include "Rect.h"
-	int x,y,w,h;
+#include "Enemy.h"
-};
+#include "Player.h"
-
+#include "Bullet.h"
-class Enemy{
-	olc::vf2d pos;
-	Rect*sprite;
-	int health;
-public:
-	Enemy(olc::vi2d pos,Rect*sprite,int health=1)
-		:pos(pos),sprite(sprite),health(health){};
-	olc::vf2d GetPos(){
-		return pos;	
-	}
-	olc::vi2d GetSprPos(){
-		return {sprite->x,sprite->y};	
-	}
-	olc::vi2d GetSprSize(){
-		return {sprite->w,sprite->h};	
-	}
-	void Hurt(int damage=1){
-		health-=damage;
-	}
-	bool IsAlive(){
-		return health>0;
-	}
-	void Move(olc::vi2d moveAmt){
-		pos+=moveAmt;
-	}
-	olc::Pixel GetColor(){
-		if(health>1){
-			return {255,96,96};
-		} else {
-			return olc::GREEN;
-		}
-	}
-};
-
-class Player{
-	olc::vf2d pos;
-	Rect*sprite;
-	float lastShootTime=0;
-public:
-	Player(olc::vi2d pos,Rect*sprite)
-		:pos(pos),sprite(sprite){}
-	olc::vf2d GetPos(){
-		return pos;
-	}
-	olc::vi2d GetSprPos(){
-		return {sprite->x,sprite->y};	
-	}
-	olc::vi2d GetSprSize(){
-		return {sprite->w,sprite->h};	
-	}
-	void Update(float fElapsedTime){
-		lastShootTime=std::max(lastShootTime-fElapsedTime,0.f);
-	}
-	bool CanShoot(){
-		return lastShootTime==0;
-	}
-	void OnShoot(){
-		lastShootTime=0.5;
-	}
-	void Move(olc::vf2d moveAmt){
-		pos+=moveAmt;
-	}
-};
-
-class Bullet{
-	olc::vf2d pos;
-	bool alive=true;
-public:
-	Bullet(olc::vi2d pos)
-		:pos(pos){}
-	olc::vf2d GetPos(){
-		return pos;
-	}
-	void Update(float fElapsedTime){
-		pos+={0,-72*fElapsedTime};
-	}
-	bool CollidesWith(Enemy&enemy){
-		float dist2=pow(enemy.GetPos().x+enemy.GetSprSize().x-pos.x,2)+pow(enemy.GetPos().y+enemy.GetSprSize().y-pos.y,2);
-		return dist2<64;
-	}
-	void KillBullet(){
-		alive=false;
-	}
-	bool IsAlive(){
-		return alive||pos.y<0;
-	}
-};
 
 // Override base class with your custom functionality
 class ShooterExample : public olc::PixelGameEngine
@@ -120,8 +33,10 @@ public:
 	
 	bool OnUserCreate() override
 	{
+		//Load sprites
 		spriteSheet.Load("8-bit Aliens.png");
 
+		//Create all enemies in a 12x4 grid, selecting one of three alien types at random.
 		olc::vf2d alienOffset={24,38};
 		for (int y=0;y<4;y++){
 			for (int x=0;x<12;x++){
@@ -146,12 +61,14 @@ public:
 
 	bool OnUserUpdate(float fElapsedTime) override
 	{
+		//Perform player and bullet game updates.
 		player.Update(fElapsedTime);
 
 		for(Bullet&b:bullets){
 			b.Update(fElapsedTime);
 		}
 
+		//Update all enemies to move in a zig-zag pattern.
 		lastShiftTime+=fElapsedTime;
 		if(lastShiftTime>0.8){
 			lastShiftTime-=0.8;
@@ -175,6 +92,7 @@ public:
 			}
 		}
 
+		//Player regions
 		if(GetKey(olc::SPACE).bHeld){
 			if(player.CanShoot()){
 				player.OnShoot();
@@ -188,10 +106,12 @@ public:
 			player.Move({48*fElapsedTime,0});
 		}
 
+		//Draw and render all objects
 		Clear(olc::BLACK);
 		for(Enemy&e:enemies){
 			for(Bullet&b:bullets){
 				if(!b.IsAlive())continue;
+				//Handle Bullet collisions per Enemy
 				if(b.CollidesWith(e)){
 					e.Hurt();
 					b.KillBullet();

ShooterExample/ShooterExample.vcxproj

@@ -127,11 +127,21 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClInclude Include="Bullet.h" />
+    <ClInclude Include="Enemy.h" />
     <ClInclude Include="olcPixelGameEngine.h" />
+    <ClInclude Include="Rect.h" />
   </ItemGroup>
   <ItemGroup>
+    <ClCompile Include="Bullet.cpp" />
+    <ClCompile Include="Enemy.cpp" />
+    <ClCompile Include="Player.cpp" />
+    <ClCompile Include="Rect.cpp" />
     <ClCompile Include="ShooterExample.cpp" />
   </ItemGroup>
+  <ItemGroup>
+    <None Include="Player.h" />
+  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>

ShooterExample/ShooterExample.vcxproj.filters

@@ -18,10 +18,36 @@
     <ClInclude Include="olcPixelGameEngine.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="Rect.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="Enemy.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="Bullet.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="ShooterExample.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="Rect.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="Enemy.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="Player.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="Bullet.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Player.h">
+      <Filter>Header Files</Filter>
+    </None>
   </ItemGroup>
 </Project>