much shaderitude

New Actor:addParticles3D to automatically handle particles with "noup"

game/engines/default/engine/Entity.lua

@@ -22,6 +22,7 @@
 -- Usually there is no need to use it directly, and it is better to use specific engine.Grid, engine.Actor or engine.Object
 -- classes. Most modules will want to subclass those anyway to add new comportments
 local Shader = require "engine.Shader"
+local Particles = require "engine.Particles"
 
 module(..., package.seeall, class.make)
 
@@ -205,6 +206,27 @@ function _M:addParticles(ps)
 	return ps
 end
 
+--- Adds a particles emitter following the entity and duplicate it for the back
+function _M:addParticles3D(def, args, shader)
+	local args1, args2 = table.clone(args or {}), table.clone(args or {})
+	args1.noup = 2
+	args2.noup = 1
+	local shader1, shader2 = nil, nil
+	if shader then 
+		shader1, shader2 = table.clone(shader), table.clone(shader)
+		shader1.noup = 2
+		shader2.noup = 1
+	end
+	local ps1 = Particles.new(def, 1, args1, shader1)
+	ps1.toback = true
+	local ps2 = Particles.new(def, 1, args2, shader2)
+
+	self:addParticles(ps1)
+	self:addParticles(ps2)
+
+	return ps1, ps2
+end
+
 --- Removes a particles emitter following the entity
 function _M:removeParticles(ps)
 	if not ps then return end

game/modules/tome/data/gfx/particles/volumetric.lua

+-- ToME - Tales of Maj'Eyal
+-- Copyright (C) 2009 - 2014 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
+
+use_shader = {type="volumetric/"..(kind or "volumetric"), noup=noup, coneAngle = coneAngle, topTransperency = topTransperency, twist = twist, isSphere = isSphere, growSpeed = growSpeed, cylinderRadius = cylinderRadius, cylinderHeight = cylinderHeight, shininess = shininess, density = density, scrollingSpeed = scrollingSpeed}
+
+base_size = 32
+
+local nb = 0
+x = x or 0
+y = y or 0
+life = life or nil
+
+local first = true
+
+return {
+	blend_mode=additive and core.particles.BLEND_SHINY or nil,
+	system_rotation = base_rotation or 0, system_rotationv = rotation or 0,
+	generator = function()
+	local fs = 38 * (radius or 1)
+
+	return {
+		trail = 0,
+		life = life or 100,
+		size = fs, sizev = 0, sizea = 0,
+
+		x = x * base_size, xv = 0, xa = 0,
+		y = y * base_size, yv = 0, ya = 0,
+		dir = 0, dirv = dirv, dira = 0,
+		vel = 0, velv = 0, vela = 0,
+
+		r = 1, rv = 0, ra = 0,
+		g = 1, gv = 0, ga = 0,
+		b = 1, bv = 0, ba = 0,
+		a = a or 1, av = 0, aa = 0,
+	}
+end, },
+function(self)
+	if first or not life then self.ps:emit(1) end
+	first = false
+end,
+1, "particles_images/volumetric/"..(img or "circles_01"), true