Collision Meshes - Revision history

MoP: Back down a level!

2008-01-03T13:48:35Z

Back down a level!

Ducks at 13:40, 3 January 2008

2008-01-03T13:40:22Z

Ducks: /* Valid Collision Materials */

2008-01-03T12:36:01Z

‎Valid Collision Materials

Ducks at 12:33, 3 January 2008

2008-01-03T12:33:50Z

Ducks: tidied up headings

2008-01-03T12:33:30Z

tidied up headings

MoP: Added info on collision and materials

2007-11-28T19:04:50Z

Added info on collision and materials

192.168.0.129 at 17:12, 15 October 2007

2007-10-15T17:12:19Z

New page

=== Overview ===
Collision meshes are used to improve in-game physics performance. They can also be used to stop players or vehicles catching on small protrusions from meshes, and generally smoothing out player movement over complex shapes.

=== Tips ===
* Unlike shadow hulls, collision meshes do not have to be "watertight", open edges are allowed. However, bear in mind that things in the game will only collide with front-facing polys, so a single flat plane would only have collision on one side of it.
* Collision meshes are automatically optimised by the game to use polygons rather than triangles. Therefore, co-planar triangles will be optimised down into a single ''n''-sided polygon, for efficiency and performance.<noinclude>

[[Category:Models]]
</noinclude>

@@ Line 40: / Line 40: @@
-==== Collision Model Tips ====
+=== Collision Model Tips ===
 * You do not have to create separate meshes for the vehicles, players and bullet collision if you don't want to. You can create a single optimised collision mesh and use the "<tt>textures/common/collision</tt>" material.
 * Unlike shadow hulls, collision meshes do not have to be "watertight", open edges are allowed. However, bear in mind that things in the game will only collide with front-facing polys, so a single flat plane would only have collision on one side of it.

@@ Line 18: / Line 18: @@
 {{clear}}
-== Vehicle and Player Collision ==
+==== Vehicle and Player Collision ====
 [[Image:teapot_vehicleplayerclip.jpg|right|thumb|The vehicle and player collision mesh for the teapot, made of 15 polygons.]]
 We usually make really simple shapes that serve as collision models for vehicle and player physics. Most of the time, especially on small objects, the player will not be able to tell they are walking over or around a box or simple cylinder instead of the actual visible mesh.
@@ Line 30: / Line 30: @@
-== Bullet Collision ==
+==== Bullet Collision ====
 [[Image:teapot_bulletclip.jpg|right|thumb|The bullet collision mesh for the teapot, made of 160 polygons.]]
 Most of the time, the very simple shape used for player and vehicle collision is not enough to support complex surface interactions like drawing bullet decals onto the mesh. Additionally, a mesh that is simplified for player and vehicle collision might create invisible collision in places where you should be able to shoot bullets through (in this case, the teapot's handle).
@@ Line 40: / Line 40: @@
-== Collision Model Tips ==
+==== Collision Model Tips ====
 * You do not have to create separate meshes for the vehicles, players and bullet collision if you don't want to. You can create a single optimised collision mesh and use the "<tt>textures/common/collision</tt>" material.
 * Unlike shadow hulls, collision meshes do not have to be "watertight", open edges are allowed. However, bear in mind that things in the game will only collide with front-facing polys, so a single flat plane would only have collision on one side of it.

@@ Line 49: / Line 49: @@
 == Valid Collision Materials ==
 The surface type of each material is denoted by the suffix (eg. ''_metal'' for metal sound and particle effects).
 Where no surface type suffix is specified, default effects will be used, which usually look and sound like concrete.

@@ Line 10: / Line 10: @@
-== A Simple Example ==
+=== A Simple Example ===
 [[Image:teapot_mesh.jpg|right|thumb|A small but detailed teapot model.]]
 Here's a teapot model that we want to use in the game. It's not very big, but it has 1600 triangles!

@@ Line 1: / Line 1: @@
-=== Overview ===
+== Overview ==
 Collision meshes are used to improve in-game physics performance. They can also be used to stop players or vehicles catching on small protrusions from meshes, and generally smoothing out player movement over complex shapes.
-==== Collision Meshes for Mapobject Models ====
+== Collision Meshes for Mapobject Models ==
 When you make a model to be used as a mapobject, by default all the triangles are used as collision parts. This means that bullets, projectiles, players and vehicles collision all have to be calculated against every polygon in the model. Most of the time this is unnecessary (especially for player and vehicle collision) and reduces run-time performance in the game.
@@ Line 10: / Line 10: @@
-=== A Simple Example ===
+== A Simple Example ==
 ----
 [[Image:teapot_mesh.jpg|right|thumb|A small but detailed teapot model.]]
@@ Line 19: / Line 19: @@
 {{clear}}
-==== Vehicle and Player Collision ====
+== Vehicle and Player Collision ==
 [[Image:teapot_vehicleplayerclip.jpg|right|thumb|The vehicle and player collision mesh for the teapot, made of 15 polygons.]]
 We usually make really simple shapes that serve as collision models for vehicle and player physics. Most of the time, especially on small objects, the player will not be able to tell they are walking over or around a box or simple cylinder instead of the actual visible mesh.
@@ Line 31: / Line 31: @@
-==== Bullet Collision ====
+== Bullet Collision ==
 [[Image:teapot_bulletclip.jpg|right|thumb|The bullet collision mesh for the teapot, made of 160 polygons.]]
 Most of the time, the very simple shape used for player and vehicle collision is not enough to support complex surface interactions like drawing bullet decals onto the mesh. Additionally, a mesh that is simplified for player and vehicle collision might create invisible collision in places where you should be able to shoot bullets through (in this case, the teapot's handle).
@@ Line 41: / Line 41: @@
-=== Collision Model Tips ===
+== Collision Model Tips ==
 * You do not have to create separate meshes for the vehicles, players and bullet collision if you don't want to. You can create a single optimised collision mesh and use the "<tt>textures/common/collision</tt>" material.
 * Unlike shadow hulls, collision meshes do not have to be "watertight", open edges are allowed. However, bear in mind that things in the game will only collide with front-facing polys, so a single flat plane would only have collision on one side of it.
@@ Line 49: / Line 49: @@
-=== Valid Collision Materials ===
+== Valid Collision Materials ==
 ----
 The surface type of each material is denoted by the suffix (eg. ''_metal'' for metal sound and particle effects).
 Where no surface type suffix is specified, default effects will be used, which usually look and sound like concrete.
-==== Generic Collision ====
+=== Generic Collision ===
 Vehicles, players, bullets and projectiles will all collide with this material. Nothing passes through.
 * <tt>textures/common/collision</tt>
@@ Line 61: / Line 61: @@
 * <tt>textures/common/collision_concrete</tt>
-==== Vehicle & Player Collision ====
+=== Vehicle & Player Collision ===
 Vehicles and players will collide with this material. Projectiles and bullets will pass through.
 * <tt>textures/common/vehicleplayer_clip</tt>
@@ Line 70: / Line 70: @@
 * <tt>textures/common/vehicleplayer_clip_snow</tt>
-==== Player Collision ====
+=== Player Collision ===
 Only players will collide with this material. Vehicles, projectiles and bullets will pass through.
 * <tt>textures/common/player_clip</tt>
@@ Line 78: / Line 78: @@
 * <tt>textures/common/player_clip_glass</tt>
-==== Vehicle Collision ====
+=== Vehicle Collision ===
 Only vehicles will collide with this material. Players, projectiles and bullets will pass through.
 * <tt>textures/common/vehicle_clip</tt>
@@ Line 86: / Line 86: @@
 * <tt>textures/common/vehicle_clip_snow</tt>
-==== "Rendermodel" Collision ====
+=== "Rendermodel" Collision ===
 Bullets and projectiles (and flyer drones!) will collide with this material. Players and vehicles will pass through.
 * <tt>textures/common/rendermodel_clip</tt>
@@ Line 94: / Line 94: @@
 * <tt>textures/common/rendermodel_clip_glass</tt>
-==== Special Collision Types ====
+=== Special Collision Types ===
 * <tt>textures/common/projectile_clip</tt> - Allows bullets to pass through, but not projectiles (eg. rockets and tank shells).
 [[Category:Models]]
 </noinclude>