plop

game/modules/tome/data/gfx/shaders/main_fbo/gestures.frag

+uniform sampler2D tex;
+uniform float intensity;
+uniform float fade;
+uniform float tick;
+
+void main(void)
+{
+	vec2 pos = gl_TexCoord[0];
+	vec4 c = texture2D(tex, pos);
+
+	float v = gl_TexCoord[0].x;
+	v = min(clamp(v * 2.0, 0.0, 1.0), clamp((1.0 - v) * 2.0, 0.0, 1.0));
+	c.a *= v * v * intensity;
+	if (intensity < 1.0) c.a *= v;
+	c *= gl_Color;
+
+	if (fade > 0.0) {
+		c.a *= fade;
+	}
+
+	gl_FragColor = c;
+}

game/modules/tome/data/gfx/shaders/main_fbo/gestures.lua

+-- ToME - Tales of Maj'Eyal
+-- Copyright (C) 2009 - 2015 Nicolas Casalini
+--
+-- 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 3 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, see <http://www.gnu.org/licenses/>.
+--
+-- Nicolas Casalini "DarkGod"
+-- darkgod@te4.org
+
+return {
+	frag = "main_fbo/gestures",
+	vert = nil,
+	args = {
+		tex = { texture = 0 },
+		intensity = intensity or 0.6,
+		fade = fade or 0,
+	},
+	clone = false,
+	permanent = true,
+}