From 0ea5fc66924303d1bf73ba283a383e2aadee02f2 Mon Sep 17 00:00:00 2001 From: neodarz Date: Sat, 11 Aug 2018 20:21:34 +0200 Subject: Initial commit --- docs/contrib/creating_landscape_collisions.html | 193 ++++++++++++++++++++++++ 1 file changed, 193 insertions(+) create mode 100644 docs/contrib/creating_landscape_collisions.html (limited to 'docs/contrib/creating_landscape_collisions.html') diff --git a/docs/contrib/creating_landscape_collisions.html b/docs/contrib/creating_landscape_collisions.html new file mode 100644 index 00000000..4731b944 --- /dev/null +++ b/docs/contrib/creating_landscape_collisions.html @@ -0,0 +1,193 @@ + + + + + NeL Collisions + + + + + +

How to create collisions in a landscape

+

License

+ +

+ + Copyright (C) 2002, Philippe Lamoureux, phlam@noos.fr
+
+ 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
+

+ +

Description

+

During the build-gamedata process, NeL patches automatically generate a collision layer.
+To insert a mesh into your landscape and have your character collide it, you have to manually add collision informations.

+ +This document shows how to create this kind of collisions in 3DSMax and export / test them in the Snowballs demo. +

+ +

Requisites

+You need the following configuration : + +Backup your original Snowballs files : some of them will be changed by this process.
+Copy the original snowball.gr and snowballs.rbank files from /snowballs/data/pacs/ into /build_gamedata/processes/rbank/smooth/
+ +

Overall process

+

+

+

+

Details on collisions

+

Pairs

+

+In a landscape, every collision system is composed of two objects : an interior and an exterior mesh
+

+Even if there is no need for an interior collision mesh, this mesh must be present : +

+ + + + + + + + + +
Here is a simple box placed on the landscape + The 'exterior' collision mesh prevents the player from crossing the visible mesh
+ The 'interior' collision mesh is of no use, but it has to be present. +
+

Frontiers

+

+To have the character walk on a mesh, like a staircase or a ramp, the exterior and interior +collision meshes must have overlapping invisible open edges.
+Every invisible edge in the exterior mesh must have a corresponding 'snapped' edge in the interior mesh. +

+ + + + + + + + + +
Ramp raising from the ground, the player cannot walk under it. +
    +
  • The visible edges of the exterior mesh block the user coming from the landscape
    • +
  • The visible edges of the interior mesh prevent the user from falling out of the ramp
    • +
  • The superposed invisible edges of both the interior and the exterior meshes indicate a connection between the landscape and the ramp
    • +
+
+

Objects informations and constraints

+

+

+

+

Complex collisions

+ + + + + + + + + + + + + + + + + +
The following example is composed of two collision systems
A connection between the landscape and the ramp, but the exterior mesh only blocks the path around the start : + the player can walk under the ramp. + A collision at the base of the ramp. +
+ +

Remark

+

+For now this system cannot create bridges.
+You can have a collision that has two or more distinct connections with the landscape, but the exterior mesh cannot be broken into +multiple meshes, so you couldn't go onto and under a bridge
+
+
+
+
+
+

+ + + + -- cgit v1.2.1