Cannon.

common.mk

@@ -13,6 +13,7 @@ SEARCHPATH += src/world
 SEARCHPATH += src/world/entities 
 SEARCHPATH += src/world/entities/blobs
 SEARCHPATH += src/world/entities/boss
+SEARCHPATH += src/world/entities/cannons
 SEARCHPATH += src/world/entities/items
 
 vpath %.c $(SEARCHPATH)
@@ -22,7 +23,7 @@ DEPS += defs.h structs.h
 
 OBJS += atlas.o
 OBJS += battery.o blaze.o bob.o boss.o blobBoss.o
-OBJS += camera.o cell.o cherry.o combat.o consumable.o
+OBJS += camera.o cannon.o cell.o cherry.o combat.o consumable.o
 OBJS += draw.o
 OBJS += effects.o entities.o explosions.o eyeDroidCommander.o
 OBJS += frost.o

src/defs.h

@@ -192,6 +192,11 @@ enum
 	MS_COMPLETE
 };
 
+enum
+{
+	WS_IN_PROGRESS
+};
+
 enum
 {
 	PLANE_BACKGROUND,

src/structs.h

@@ -113,6 +113,7 @@ struct Entity {
 	int damage;
 	int weaponType;
 	int shotsToFire;
+	int maxShotsToFire;
 	int isSolid;
 	int environment;
 	int isStatic;
@@ -147,6 +148,7 @@ struct Entity {
 	void (*touch)(Entity *other);
 	void (*tick)(void);
 	void (*die)(void);
+	int (*canFire)(Entity *target);
 	void (*reset)(void);
 	void (*activate)(int active);
 	void (*changeEnvironment)(void);
@@ -331,6 +333,7 @@ struct Particle {
 
 typedef struct {
 	char id[MAX_NAME_LENGTH];
+	int state;
 	Entity *bob, *boss;
 	Map map;
 	Entity entityHead, *entityTail;

src/world/entities/cannons/cannon.c

@@ -0,0 +1,191 @@
+/*
+Copyright (C) 2018 Parallel Realities
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#include "cannon.h"
+
+static void applyDamage(int damage);
+static void walk(void);
+static void die(void);
+static void animate(void);
+static SDL_Rect getBounds(void);
+static int canFire(Entity *target);
+static void preFire(void);
+
+void initCannon(Entity *e)
+{
+	initUnit(e);
+
+	e->sprite[FACING_LEFT] = getSpriteIndex("CannonLeft");
+	e->sprite[FACING_RIGHT] = getSpriteIndex("CannonRight");
+	e->sprite[FACING_DIE] = getSpriteIndex("CannonLeft");
+
+	e->weaponType = WPN_MISSILE;
+
+	e->maxShotsToFire = 4;
+
+	e->reload = 0;
+
+	e->canCarryItem = 1;
+
+	e->health = e->healthMax = 50;
+
+	e->flags |= EF_EXPLODES;
+
+	e->animate = animate;
+	e->applyDamage = applyDamage;
+	e->walk = walk;
+	e->die = die;
+	e->getBounds= getBounds;
+	e->canFire = canFire;
+}
+
+static void applyDamage(int damage)
+{
+	if (self->health > 0)
+	{
+		self->health -= damage;
+
+		self->facing = self->x < world.bob->x ? FACING_RIGHT : FACING_LEFT;
+
+		self->thinkTime = 0;
+	}
+}
+
+static void die(void)
+{
+	int mx, my;
+
+	self->health--;
+
+	if (self->health % 3 == 0)
+	{
+		mx = (int) ((self->x + (self->w / 2)) / MAP_TILE_SIZE);
+		my = (int) ((self->y + self->h) / MAP_TILE_SIZE);
+		addScorchDecal(mx, my);
+
+		addExplosion(self->x, self->y, 50, self);
+	}
+
+	if (self->health <= -50)
+	{
+		updateObjective(self->name);
+		updateObjective("ENEMY");
+		fireTriggers(self->name);
+
+		dropCarriedItem();
+
+		self->alive = ALIVE_DEAD;
+	}
+}
+
+static void patrol(void)
+{
+	self->facing = rand() % 2 ? FACING_LEFT : FACING_RIGHT;
+
+	self->thinkTime = rrnd(FPS / 2, FPS);
+}
+
+static void lookForPlayer(void)
+{
+	int r;
+
+	self->thinkTime = rrnd(FPS / 2, FPS);
+
+	if (world.state != WS_IN_PROGRESS || dev.cheatBlind)
+	{
+		patrol();
+		return;
+	}
+
+	if ((self->facing == FACING_LEFT && world.bob->x > self->x) || (self->facing == FACING_RIGHT && world.bob->x < self->x))
+	{
+		patrol();
+		return;
+	}
+
+	if (getDistance(world.bob->x, world.bob->y, self->x, self->y) > 650)
+	{
+		patrol();
+		return;
+	}
+
+	if (!enemyCanSeePlayer(self))
+	{
+		patrol();
+		return;
+	}
+
+	r = rand() % 100;
+
+	if (self->isMissionTarget)
+	{
+		r = rand() % 20;
+	}
+
+	if (r < 15)
+	{
+		self->shotsToFire = rrnd(1, self->maxShotsToFire);
+		self->action = preFire;
+	}
+}
+
+static void preFire(void)
+{
+	self->facing = (world.bob->x < self->x) ? FACING_LEFT : FACING_RIGHT;
+
+	if (self->reload > 0)
+	{
+		return;
+	}
+
+	self->attack();
+
+	self->shotsToFire--;
+
+	if (self->shotsToFire == 0)
+	{
+		self->walk();
+	}
+}
+
+static void walk(void)
+{
+	self->action = lookForPlayer;
+}
+
+static void animate(void)
+{
+
+}
+
+static SDL_Rect getBounds(void)
+{
+	self->bounds.x = self->x + 36;
+	self->bounds.y = self->y;
+	self->bounds.w = 36;
+	self->bounds.h = self->h;
+
+	return self->bounds;
+}
+
+static int canFire(Entity *target)
+{
+	return abs(target->y - self->y) <= MAP_TILE_SIZE;
+}

src/world/entities/cannons/cannon.h

@@ -0,0 +1,36 @@
+/*
+Copyright (C) 2018 Parallel Realities
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#include "../../../common.h"
+
+extern void initUnit(Entity *e);
+extern void addExplosion(float x, float y, int radius, Entity *owner);
+extern int rrnd(int low, int high);
+extern int getSpriteIndex(char *name);
+extern int getDistance(int x1, int y1, int x2, int y2);
+extern int enemyCanSeePlayer(Entity *e);
+extern void updateObjective(char *targetName);
+extern void fireTriggers(char *targetName);
+extern void dropCarriedItem(void);
+extern void addScorchDecal(int x, int y);
+
+extern Dev dev;
+extern Entity *self;
+extern World world;

src/world/entities/items/keycard.h

@@ -20,14 +20,9 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 #include "../../../common.h"
 
-extern void playSound(int snd, int ch);
-extern void setGameplayMessage(int type, char *format, ...);
 extern void initItem(Entity *e);
-extern int getSpriteIndex(char *name);
 extern void updateObjective(char *targetName);
-extern int rrnd(int low, int high);
 extern void teekaExitMission(void);
 
 extern Entity *self;
-extern Game game;
 extern World world;

src/world/entities/items/weaponPickup.h

@@ -24,13 +24,9 @@ extern void playSound(int snd, int ch);
 extern void setGameplayMessage(int type, char *format, ...);
 extern void initConsumable(Entity *e);
 extern int getSpriteIndex(char *name);
-extern void updateObjective(char *targetName);
-extern int rrnd(int low, int high);
 extern void pickupItem(void);
-extern void teekaExitMission(void);
 extern void setEntitySize(Entity *e);
 extern int touchedPlayer(Entity *e);
 
 extern Entity *self;
-extern Game game;
 extern World world;