mesh.Begin
Description
Starts a new dynamic mesh. If an IMesh is passed, it will use that mesh instead.
Arguments
1 IMesh mesh = nil
Mesh to build. This argument can be removed if you wish to build a "dynamic" mesh. See examples below.
Example
Draws a triangle near Vector( 0, 0, 0 ) in the map using a dynamic mesh.
local mat = Material( "editor/wireframe" ) -- The material (a wireframe)
local verts = { -- A table of 3 vertices that form a triangle
{ pos = Vector( 0, 0, 0 ), u = 0, v = 0 }, -- Vertex 1
{ pos = Vector( 10, 0, 0 ), u = 1, v = 0 }, -- Vertex 2
{ pos = Vector( 10, 10, 0 ), u = 1, v = 1 }, -- Vertex 3
}
hook.Add( "PostDrawOpaqueRenderables", "MeshLibTest", function()
render.SetMaterial( mat ) -- Apply the material
mesh.Begin( MATERIAL_TRIANGLES, 1 ) -- Begin writing to the dynamic mesh
for i = 1, #verts do
mesh.Position( verts[i].pos ) -- Set the position
mesh.TexCoord( 0, verts[i].u, verts[i].v ) -- Set the texture UV coordinates
mesh.AdvanceVertex() -- Write the vertex
end
mesh.End() -- Finish writing the mesh and draw it
end )
Example
Draws a triangle near Vector( 0, 0, 0 ) in the map using a static mesh.
local mat = Material( "editor/wireframe" ) -- The material (a wireframe)
local obj = Mesh() -- Create the IMesh object
local verts = { -- A table of 3 vertices that form a triangle
{ pos = Vector( 0, 0, 0 ), u = 0, v = 0 }, -- Vertex 1
{ pos = Vector( 10, 0, 0 ), u = 1, v = 0 }, -- Vertex 2
{ pos = Vector( 10, 10, 0 ), u = 1, v = 1 }, -- Vertex 3
}
mesh.Begin( obj, MATERIAL_TRIANGLES, 1 ) -- Begin writing to the static mesh
for i = 1, #verts do
mesh.Position( verts[i].pos ) -- Set the position
mesh.TexCoord( 0, verts[i].u, verts[i].v ) -- Set the texture UV coordinates
mesh.AdvanceVertex() -- Write the vertex
end
mesh.End() -- Finish writing to the IMesh
hook.Add( "PostDrawOpaqueRenderables", "MeshLibTest", function()
render.SetMaterial( mat ) -- Apply the material
obj:Draw() -- Draw the mesh
end )
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