spells pt1

Actor.cpp

@@ -31,4 +31,10 @@ Actor::~Actor() {
 	if (ai) delete ai;
 	if (pickable) delete pickable;
 	if (container) delete container;
+}
+
+float Actor::getDistance(int cx, int cy) const {
+	int dx = x - cx;
+	int dy = y - cy;
+	return sqrtf(dx * dx + dy * dy);
 }

Actor.h

@@ -21,7 +21,7 @@ public:
     Ai* ai;
     Pickable* pickable; // something that can be picked and used
     Container* container; // something that can contain actors
-
+    float getDistance(int cx, int cy) const;
     Actor(int x, int y, std::string_view ch, std::string name, const TCOD_ColorRGB& col);
 	~Actor();
     void render(TCOD_Console& cons) const;

CMakeLists.txt

@@ -14,7 +14,7 @@ project ("ADG5")
 find_package(libtcod CONFIG REQUIRED)
 
 # Add source to this project's executable.
-add_executable (ADG5 "ADG5.cpp" "ADG5.h" "Actor.cpp" "Actor.h" "Map.h" "Map.cpp" "Engine.h" "Engine.cpp" "Destructible.h" "Destructible.cpp" "Attacker.h" "Attacker.cpp" "Ai.h" "Ai.cpp" "Gui.h" "Gui.cpp" "Container.h" "Container.cpp" "Pickable.h" "Pickable.cpp" "Healer.h" "Healer.cpp")
+add_executable (ADG5 "ADG5.cpp" "ADG5.h" "Actor.cpp" "Actor.h" "Map.h" "Map.cpp" "Engine.h" "Engine.cpp" "Destructible.h" "Destructible.cpp" "Attacker.h" "Attacker.cpp" "Ai.h" "Ai.cpp" "Gui.h" "Gui.cpp" "Container.h" "Container.cpp" "Pickable.h" "Pickable.cpp" "Healer.h" "Healer.cpp" "Lightningbolt.h" "Lightningbolt.cpp" "Fireball.h" "Fireball.cpp")
 
 target_link_libraries(ADG5
   PRIVATE

Engine.cpp

@@ -22,6 +22,8 @@ Engine::Engine(int screenWidth, int screenHeight, tcod::Context *context, tcod::
 	gameStatus = STARTUP;
 	mouse.cx = 0;
 	mouse.cy = 0;
+	mouse.rbutton_pressed = false;
+	mouse.lbutton_pressed = false;
 }
 
 void Engine::init() {
@@ -62,7 +64,7 @@ bool Engine::update() {
 	return true;
 }
 
-void Engine::render() {
+void Engine::render(bool present) {
 	console->clear();
 	// draw the map
 	map->render(*console);
@@ -77,10 +79,80 @@ void Engine::render() {
 	}
 	player->render(*console);
 	gui->render();
-	context->present(*console);
+	if (present)
+		context->present(*console);
 }
 
 void Engine::sendToBack(Actor* actor) {
 	actors.remove(actor);
 	actors.insertBefore(actor, 0);
+}
+
+Actor* Engine::getClosestMonster(int x, int y, float range) const {
+	Actor* closest = NULL;
+	float bestDistance = 1E6f;
+	for (Actor** iterator = actors.begin();
+		iterator != actors.end(); iterator++) {
+		Actor* actor = *iterator;
+		if (actor != player && actor->destructible
+			&& !actor->destructible->isDead()) {
+			float distance = actor->getDistance(x, y);
+			if (distance < bestDistance && (distance <= range || range == 0.0f)) {
+				bestDistance = distance;
+				closest = actor;
+			}
+		}
+	}
+	return closest;
+}
+
+bool Engine::pickATile(int* x, int* y, float maxRange) {
+	while (context->get_sdl_window() != nullptr) {
+		render(false);
+
+		// highlight the possible range
+		for (int cx = 0; cx < map->width; cx++) {
+			for (int cy = 0; cy < map->height; cy++) {
+				if (map->isInFov(cx, cy)
+					&& (maxRange == 0 || player->getDistance(cx, cy) <= maxRange)) {
+					TCOD_ColorRGBA col = console->at(cx, cy).bg;
+
+					col.r = col.r * 1.2f;
+					col.g = col.g * 1.2f;
+					col.b = col.b * 1.2f;
+
+					console->at(cx, cy).bg = col;
+				}
+			}
+		}
+		SDL_Event event;
+		while (SDL_PollEvent(&event)) {
+			engine->context->convert_event_coordinates(event);
+			switch (event.type) {
+			case SDL_EVENT_MOUSE_MOTION:
+				engine->mouse.cx = event.motion.x;
+				engine->mouse.cy = event.motion.y;
+				break;
+			case SDL_EVENT_MOUSE_BUTTON_DOWN:
+				engine->mouse.lbutton_pressed = event.button.button == SDL_BUTTON_LEFT;
+				engine->mouse.rbutton_pressed = event.button.button == SDL_BUTTON_RIGHT;
+				break;
+			}
+		}
+
+		if (map->isInFov(mouse.cx, mouse.cy)
+			&& (maxRange == 0 || player->getDistance(mouse.cx, mouse.cy) <= maxRange)) {
+			console->at(mouse.cx, mouse.cy).bg = TCOD_ColorRGBA(100, 100, 100, 255);
+			if (mouse.lbutton_pressed) {
+				*x = mouse.cx;
+				*y = mouse.cy;
+				return true;
+			}
+		}
+		if (mouse.rbutton_pressed) {
+			return false;
+		}
+		context->present(*console);
+	}
+	return false;
 }

Engine.h

@@ -30,8 +30,10 @@ public:
     void init();
     ~Engine();
     bool update();
-    void render();
+    void render(bool present = true);
     void sendToBack(Actor* actor);
+    Actor* getClosestMonster(int x, int y, float range) const;
+    bool pickATile(int* x, int* y, float maxRange = 0.0f);
 private:
     bool computeFov;
 };

Fireball.cpp

@@ -0,0 +1,30 @@
+#include "libtcod.hpp"
+#include "Fireball.h"
+#include "Engine.h"
+#include "Gui.h"
+#include "Destructible.h"
+#include "Actor.h"
+
+Fireball::Fireball(float range, float damage)
+    : LightningBolt(range, damage) {
+}
+
+bool Fireball::use(Actor* owner, Actor* wearer) {
+    engine->gui->message(TCOD_ColorRGB(0, 255, 255), "Left-click a target tile for the fireball,\nor right-click to cancel.");
+    int x, y;
+    if (!engine->pickATile(&x, &y)) {
+        return false;
+    }
+    engine->gui->message(TCOD_ColorRGB(255, 255, 100), "The fireball explodes, burning everything within %g tiles!", range);
+    for (Actor** iterator = engine->actors.begin();
+        iterator != engine->actors.end(); iterator++) {
+        Actor* actor = *iterator;
+        if (actor->destructible && !actor->destructible->isDead()
+            && actor->getDistance(x, y) <= range) {
+            engine->gui->message(TCOD_ColorRGB(255, 255, 100), "The %s gets burned for %g hit points.",
+                actor->name.c_str(), damage);
+            actor->destructible->takeDamage(actor, damage);
+        }
+    }
+    return Pickable::use(owner, wearer);
+}

Fireball.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include "Lightningbolt.h"
+
+
+class Fireball : public LightningBolt {
+public:
+    Fireball(float range, float damage);
+    bool use(Actor* owner, Actor* wearer);
+};

Lightningbolt.cpp

@@ -0,0 +1,24 @@
+#include "Lightningbolt.h"
+#include "Engine.h"
+#include "Actor.h"
+#include "Gui.h"
+#include "Destructible.h"
+
+LightningBolt::LightningBolt(float range, float damage)
+    : range(range), damage(damage) {
+}
+
+bool LightningBolt::use(Actor* owner, Actor* wearer) {
+    Actor* closestMonster = engine->getClosestMonster(wearer->x, wearer->y, range);
+    if (!closestMonster) {
+        engine->gui->message(TCOD_ColorRGB(200,200,200), "No enemy is close enough to strike.");
+        return false;
+    }
+    // hit closest monster for <damage> hit points
+    engine->gui->message(TCOD_ColorRGB(100, 255, 100),
+        "A lighting bolt strikes the %s with a loud crack of thunder!\n"
+        "The damage is %g hit points.",
+        closestMonster->name.c_str(), damage);
+    closestMonster->destructible->takeDamage(closestMonster, damage);
+    return Pickable::use(owner, wearer);
+}

Lightningbolt.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#include "Pickable.h"
+
+class Actor;
+
+class LightningBolt : public Pickable {
+public:
+    float range, damage;
+    LightningBolt(float range, float damage);
+    bool use(Actor* owner, Actor* wearer);
+};

Map.cpp

@@ -6,6 +6,8 @@
 #include "Attacker.h"
 #include "Ai.h"
 #include "Healer.h"
+#include "Lightningbolt.h"
+#include "Fireball.h"
 
 static const int ROOM_MAX_SIZE = 12;
 static const int ROOM_MIN_SIZE = 6;
@@ -190,9 +192,31 @@ void Map::addMonster(int x, int y) {
 }
 
 void Map::addItem(int x, int y) {
-    Actor* healthPotion = new Actor(x, y, "!", "health potion",
-        TCOD_ColorRGB(128, 0, 128));
-    healthPotion->blocks = false;
-    healthPotion->pickable = new Healer(4);
-    engine->actors.push(healthPotion);
+    TCODRandom* rng = TCODRandom::getInstance();
+    int dice = rng->getInt(0, 100);
+    if (dice < 70) {
+        // create a health potion
+        Actor* healthPotion = new Actor(x, y, "!", "health potion",
+            TCOD_ColorRGB(128, 0, 128));
+        healthPotion->blocks = false;
+        healthPotion->pickable = new Healer(4);
+        engine->actors.push(healthPotion);
+    }
+    else if (dice < 70 + 10) {
+        // create a scroll of lightning bolt 
+        Actor* scrollOfLightningBolt = new Actor(x, y, "#", "scroll of lightning bolt",
+            TCOD_ColorRGB(255, 100, 100));
+        scrollOfLightningBolt->blocks = false;
+        scrollOfLightningBolt->pickable = new LightningBolt(5, 20);
+        engine->actors.push(scrollOfLightningBolt);
+    }
+
+    else if (dice < 70 + 10 + 10) {
+        // create a scroll of fireball
+        Actor* scrollOfFireball = new Actor(x, y, "#", "scroll of fireball",
+            TCOD_ColorRGB(255, 100, 100));
+        scrollOfFireball->blocks = false;
+        scrollOfFireball->pickable = new Fireball(3, 12);
+        engine->actors.push(scrollOfFireball);
+    }
 }