char/enemy: New character

2 files changed, 133 insertions, 0 deletions

diff --git a/src/char/enemy.c b/src/char/enemy.c
new file mode 100644
index 0000000..3907cf6
--- /dev/null
+++ b/src/char/enemy.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) 2021  P. J. McDermott
+ *
+ * This file is part of Maze Fight
+ *
+ * Maze Fight 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Maze Fight 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 Maze Fight.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <SDL.h>
+#include <stdlib.h>
+#include "../char.h"
+#include "../defs.h"
+#include "../maze.h"
+#include "char.h"
+
+struct mf_enemy {
+	struct mf_char parent;
+};
+
+static int
+_mf_enemy_update(struct mf_char *c, int stepped)
+{
+	enum _mf_char_dir dirs[4] = {MF_CHAR_DIR_U_, MF_CHAR_DIR_D_,
+	                             MF_CHAR_DIR_L_, MF_CHAR_DIR_R_};
+	int               i;
+	int               j;
+	int               t;
+	int               dx;
+	int               dy;
+
+	if (stepped == SDL_FALSE) {
+		return 0;
+	}
+
+	/* Shuffle directions */
+	for (i = 0; i < 4; ++i) {
+		j = rand() / (RAND_MAX / (i+1));
+		t       = dirs[i];
+		dirs[i] = dirs[j];
+		dirs[j] = t;
+	}
+	for (i = 0; i < 3; ++i) {
+		if (dirs[i] == c->cur_dir) {
+			t       = dirs[i];
+			dirs[i] = dirs[3];
+			dirs[3] = t;
+		}
+	}
+
+	for (i = 0; i < 4; ++i) {
+		switch (dirs[i]) {
+			case MF_CHAR_DIR_U_: dx =  0; dy = -1; break;
+			case MF_CHAR_DIR_D_: dx =  0; dy =  1; break;
+			case MF_CHAR_DIR_L_: dx = -1; dy =  0; break;
+			case MF_CHAR_DIR_R_: dx =  1; dy =  0; break;
+			default:             dx =  0; dy =  0; break;
+		}
+		if (!mf_maze_is_wall(c->maze, c->cur_x, c->cur_y, dx, dy)) {
+			/* Move */
+			c->new_dir = dirs[i];
+		}
+	}
+
+	return 0;
+}
+
+static int
+_mf_enemy_render(struct mf_char *c __attribute__((__unused__)),
+		SDL_Renderer *renderer __attribute__((__unused__)))
+{
+	return 0;
+}
+
+static void
+_mf_enemy_destroy(struct mf_char *c __attribute__((__unused__)))
+{
+}
+
+struct mf_char *
+mf_enemy_new(struct mf_maze *maze, int cell_width, int maze_size)
+{
+	struct mf_char  *c;
+	struct mf_enemy *p __attribute__((__unused__));
+
+	mf_char_init(c, p, enemy);
+
+	c->maze       = maze;
+	c->cell_width = cell_width;
+	c->speed      = MF_ENEMY_SPEED;
+	c->new_dir    = MF_CHAR_DIR_N_;
+	c->turning    = 0;
+	c->turn_time  = MF_ENEMY_TURN_TIME;
+	c->cur_x      = 0;
+	c->cur_y      = 0;
+	c->travel     = 0;
+	c->padding    = MF_ENEMY_P;
+	c->smile_y    = MF_ENEMY_SMILE_Y;
+	c->smile_r    = MF_ENEMY_SMILE_R;
+	c->eye_x      = MF_ENEMY_EYE_X;
+	c->eye_y      = MF_ENEMY_EYE_Y;
+	c->eye_r      = MF_ENEMY_EYE_R;
+
+	c->head_color.r = MF_COLOR_ELYR_R, c->head_color.g = MF_COLOR_ELYR_G;
+	c->head_color.b = MF_COLOR_ELYR_B, c->head_color.a = MF_COLOR_ELYR_A;
+	c->smil_color.r = MF_COLOR_ESML_R, c->smil_color.g = MF_COLOR_ESML_G;
+	c->smil_color.b = MF_COLOR_ESML_B, c->smil_color.a = MF_COLOR_ESML_A;
+	c->eyes_color.r = MF_COLOR_EEYE_R, c->eyes_color.g = MF_COLOR_EEYE_G;
+	c->eyes_color.b = MF_COLOR_EEYE_B, c->eyes_color.a = MF_COLOR_EEYE_A;
+
+	while (c->cur_x < maze_size * MF_ENEMY_MIN_DIST ||
+			c->cur_y < maze_size * MF_ENEMY_MIN_DIST) {
+		c->cur_x = rand() / (RAND_MAX / maze_size);
+		c->cur_y = rand() / (RAND_MAX / maze_size);
+	}
+
+	c->cur_dir = MF_CHAR_DIR_N_;
+	_mf_enemy_update(c, SDL_TRUE);
+	c->cur_dir = c->new_dir;
+
+	return c;
+}
diff --git a/src/char/local.mk b/src/char/local.mk
index 92134a8..a93e5f1 100644
--- a/src/char/local.mk
+++ b/src/char/local.mk
@@ -1,4 +1,5 @@
 mazefight_SOURCES += \
 	%reldir%/char.c \
 	%reldir%/char.h \
+	%reldir%/enemy.c \
 	%reldir%/player.c