Start of items.

common.mk

@@ -13,7 +13,7 @@ OBJS += draw.o
 OBJS += effects.o entities.o explosions.o
 OBJS += game.o
 OBJS += hud.o
-OBJS += init.o input.o io.o
+OBJS += init.o input.o io.o items.o
 OBJS += lookup.o
 OBJS += main.o map.o maths.o
 OBJS += objectives.o
@@ -22,7 +22,7 @@ OBJS += quadtree.o
 OBJS += sound.o sprites.o
 OBJS += text.o textures.o title.o triggers.o
 OBJS += util.o
-OBJS += widgets.o
+OBJS += weapons.o widgets.o
 
 # top-level rule to create the program.
 all: $(PROG) $(LOCALE_MO)

src/combat/weapons.c

@@ -0,0 +1,31 @@
+/*
+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 "weapons.h"
+
+int getRandomPlayerWeapon(int excludeGrenades)
+{
+	if (excludeGrenades)
+	{
+		return rand() % WPN_GRENADES;
+	}
+
+	return rand() % WPN_ANY;
+}

src/combat/weapons.h

@@ -0,0 +1,21 @@
+/*
+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"

src/defs.h

@@ -95,6 +95,20 @@ enum
 	FACING_LEFT
 };
 
+enum
+{
+	WPN_PISTOL,
+	WPN_PLASMA,
+	WPN_SPREAD,
+	WPN_LASER,
+	WPN_GRENADES,
+	WPN_ANY,
+	WPN_AIMED_PISTOL,
+	WPN_MACHINE_GUN,
+	WPN_SHOTGUN,
+	WPN_MISSILE
+};
+
 enum
 {
 	ALIVE_ALIVE

src/structs.h

@@ -93,8 +93,11 @@ struct Entity {
 	long flags;
 	SDL_Rect bounds;
 	int sprite[3];
+	int spriteTime;
+	int spriteFrame;
 	void (*walk)(void);
 	void (*attack)(void);
+	void (*touch)(Entity *other);
 	Entity *next;
 };
 
@@ -187,6 +190,7 @@ typedef struct {
 	Entity entityHead, *entityTail;
 	int allObjectivesComplete;
 	int currentStatus;
+	int isBossMission;
 	Quadtree quadtree;
 	Objective objectiveHead, *objectiveTail;
 	Trigger triggerHead, *triggerTail;

src/world/items.c

@@ -0,0 +1,94 @@
+/*
+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 "items.h"
+
+static void throwItem(Entity *e);
+static int getRandomPlayerWeaponAt(int x, int y);
+
+static int wpnIconSprite;
+static int cherrySprite[3];
+static int batterySprite;
+
+void initItems(void)
+{
+	wpnIconSprite = getSpriteIndex("Weapon");
+	batterySprite = getSpriteIndex("Battery");
+
+	cherrySprite[0] = getSpriteIndex("Cherry");
+	cherrySprite[1] = getSpriteIndex("DualCherry");
+	cherrySprite[2] = getSpriteIndex("CherryBunch");
+}
+
+void addRandomWeapon(double x, double y)
+{
+	Entity *wpn;
+	int type;
+	
+	wpn = malloc(sizeof(Entity));
+	memset(wpn, 0, sizeof(Entity));
+	world.entityTail->next = wpn;
+	world.entityTail = wpn;
+	
+	wpn->x = x;
+	wpn->y = y;
+	
+	type = getRandomPlayerWeaponAt(wpn->x, wpn->y);
+	
+	switch (type)
+	{
+		case 0:
+			wpn->touch = NULL;
+			break;
+			
+		default:
+			break;
+	}
+	
+	wpn->sprite[0] = wpn->sprite[1] = wpn->sprite[2] = wpnIconSprite;
+	wpn->spriteFrame = type;
+	wpn->spriteTime = -1;
+
+	throwItem(wpn);
+}
+
+static int getRandomPlayerWeaponAt(int x, int y)
+{
+	int type;
+	
+	type = getRandomPlayerWeapon(world.isBossMission);
+	
+	if (world.map.data[(x / MAP_TILE_SIZE)][(y / MAP_TILE_SIZE)] == MAP_TILE_WATER)
+	{
+		type = WPN_PISTOL;
+	}
+	else if (type == WPN_PISTOL && rand() < 0.25)
+	{
+		type = getRandomPlayerWeapon(world.isBossMission);
+	}
+	
+	return type;
+}
+
+static void throwItem(Entity *e)
+{
+	e->dx = rrnd(-3, 3);
+	e->dy = rrnd(-7, -5);
+}

src/world/items.h

@@ -0,0 +1,27 @@
+/*
+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 int rrnd(int low, int high);
+extern int getRandomPlayerWeapon(int excludeGrenades);
+extern int getSpriteIndex(char *name);
+
+extern World world;