Difference between revisions of "Mesh"
(Added simplified examples, helpful?)
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|Simple with texcoords
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Revision as of 10:29, 13 October 2007
A mesh is a BZW map object that defines an arbitrary three dimensional shape. A mesh is defined as a series of faces containing 3 or more points(vertices) in three dimensional space.
The code for a mesh object is as follows, this is only an example
mesh name example_mesh # Material properties applied to a mesh apply to all faces # that follow the setting. Mesh faces will alter their own # properties without affecting the state of the mesh properties. # The same pattern is used to apply physics drivers. inside 5.5 4.5 1.2 # add an inside point (repeatable) outside 0 0 1000 # add an outside point (repeatable) vertex 100 200 300 # add a vertex (repeatable) normal 1.0 0 0 # add a normal (repeatable) texcoord 0.1 0.75 # add a texture coordinate (repeatable) shift 0 0 0 # (repeatable) scale 1 1 1 # (repeatable) shear 0 0 0 # (repeatable) spin angle nx ny nz # (repeatable) phydrv example_phydrv # assign a physics driver smoothbounce # ricochets use normals noclusters # render each mesh face individually # (this can be useful for occluders) face # start a face (repeatable) # faces must be convex polygons vertices 1 4 0 3 5 # list of vertices (requires at least three) normals 2 6 0 4 7 # list of normals (optional) texcoords 0 3 2 4 9 # list of texture coordinates (optional) phydrv example_phydrv # assign a physics driver smoothbounce noclusters drivethrough shootthrough passable material endface # end the face # # This next element can be added to increase the rendering speed # of the mesh object. If the client is capable of using this data, # then it is used to draw the mesh instead of the face information. # drawInfo dlist # display list for all material sets decorative # older clients with not see this mesh angvel <degrees/sec> # rotation about initial Z axis extents <minX> <minY> <minZ> <maxX> <maxY> <maxZ> sphere <x> <y> <z> <radiusSquared> corner <v> <n> <t> (repeatable) vertex 0.0 0.0 0.0 (repeatable) normal 0.0 0.0 0.0 (repeatable) texcoord 0.0 0.0 (repeatable) lod (repeatable) lengthPerPixel <value> matref <name> (repeatable) dlist # display list for this material set sphere <x> <y> <z> <radiusSquared> points 0 (repeatable) lines 0 1 (repeatable) lineloop 0 1 (repeatable) linestrip 0 1 (repeatable) tris 0 1 2 (repeatable) tristrip 0 1 2 (repeatable) trifan 0 1 2 (repeatable) quads 0 1 2 3 (repeatable) quadstrip 0 1 2 3 (repeatable) polygon 0 1 2 (repeatable) end # matref end # lod end # drawInfo end # mesh
Valid parameters for a mesh are
|name||The name of the mesh|
|vertex||this is a 'corner' of your mesh - a point where faces connect. (at least 3 are required)|
|normal||a unit vector describing the direction light will reflect off the object|
|texcoord||this is used for mapping textures onto the mesh. This will link a point of the 2-Dimensional texture to a vertex on the 3-Dimensional object. (0,0) refers to the lower left corner of the texture, (1,1) refers to the top right. Textures are defined in the material object.|
|inside||an arbitrary vertex placed on the inside of the mesh object. This keeps tanks from driving or spawning inside the object.|
|phydrv||Assign a physics driver as defined in the physics object.|
|smoothbounce||shot will ricochet from the face in the same direction as the defined normal.|
|noclusters||Render each face individually.|
|shift||places the mesh using <x y z> coordinates|
|scale||resizes the mesh along the x, y, or z axis|
|spin||spins the mesh <angle> number of degrees, <n> number of rotations along one or more of the x, y, or z axiis|
|matref||Assign a material to all below faces.|
|face||Start a face (required), see below:|
Valid parameters within the face sub-object:
|vertices||Numbered list of vertices for this face. (requires at least three)|
|normals||Numbered list of normals for this face.|
|texcoords||Numbered list of texture coordinates for this face.|
|phydrv||Assign a physics driver to this face only.|
|smoothbounce||use normals to determine shot ricochets for this face.|
|drivethrough||Tanks can drive through this face.|
|shootthrough||Tanks can shoot through this face.|
|passable||Tanks can both shoot and drive through this face|
|matref||Assign a material to this face.|
DrawInfo can be added to the mesh object to increase rendering efficiency, allowing the designer to specify which details will be seen from certain distances. It can also be used to rotate a mesh object, though tanks can not interact with the moving object.
The appearance of a mesh will vary greatly as by its very nature it can be defined to look like anything.
mesh vertex -10 -10 0 vertex 10 -10 0 vertex 10 10 0 vertex -10 10 0 vertex -10 -10 10 vertex 10 -10 10 vertex 10 10 10 vertex -10 10 10 face #south vertices 0 1 5 4 endface face #east vertices 1 2 6 5 endface face #north vertices 2 3 7 6 endface face #west vertices 3 0 4 7 endface face #bottom vertices 0 1 2 3 endface face #top vertices 4 5 6 7 endface end #mesh
|Simple billboard with texcoords
mesh vertex -10 0 0 vertex 10 0 0 vertex 10 0 10 vertex -10 0 10 texcoord 0 0 texcoord 1 0 texcoord 1 1 texcoord 0 1 matref myBilboard face vertices 0 1 2 3 texcoord 0 1 2 3 endface face #backside vertices 1 0 3 2 texcoord 1 0 3 2 endface end #mesh
The mesh object is supported by the BZWTools blender plugin, the Wings3D Exporter or hand coding.
The Mesh object was added with the v2.0.0 release of BZFlag.