game: introduce a mask powerup

baby vs. mask: baby steals and wears mask as useless hat,
adult vs. mask: adult wears mask for 3 hits of virus protection
virus vs. masked adult: decrements mask hit points
virus vs. hatted baby: same as virus vs. unmasked baby

TODO:
- visible indication of how many remaining hits mask has
- maybe blink mask when one hit remains
- sfx for adult mask wearing and loss, baby mask stealing?
- sfx for virus vs. mask?

1 files changed, 32 insertions, 0 deletions

diff --git a/src/mask-node.c b/src/mask-node.c
new file mode 100644
index 0000000..b5d75d5
--- /dev/null
+++ b/src/mask-node.c
@@ -0,0 +1,32 @@
+/*
+ *  Copyright (C) 2022 - Vito Caputo - <vcaputo@pengaru.com>
+ *
+ *  This program is free software: you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 3 as published
+ *  by the Free Software Foundation.
+ *
+ *  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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stage.h>
+
+#include "mask-node.h"
+#include "gfx/gfx-mask.h"
+#include "tex.h"
+#include "tex-node.h"
+
+static tex_t	*mask_tex;
+
+stage_t * mask_node_new(stage_conf_t *conf, m4f_t *projection_x, m4f_t *model_x)
+{
+	if (!mask_tex)
+		mask_tex = tex_new(gfx_mask.width, gfx_mask.height, gfx_mask.pixel_data);
+
+	return tex_node_new_tex(conf, mask_tex, projection_x, model_x);
+}