Module: Quake::Bsp::FaceVertices

Defined in:
lib/quake/bsp/face_vertices.rb

Class Method Summary collapse

Class Method Details

.extract(level, face) ⇒ Object 



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# File 'lib/quake/bsp/face_vertices.rb', line 6

def self.extract(level, face)
  verts = Array.new(face.num_edges)
  face.num_edges.times do |i|
    surfedge = level.surfedges[face.first_edge + i]
    if surfedge >= 0
      edge = level.edges[surfedge]
      verts[i] = level.vertices[edge.v0]
    else
      edge = level.edges[-surfedge]
      verts[i] = level.vertices[edge.v1]
    end
  end
  verts
end

.extract_surface(level, face) ⇒ Object

Extract vertices + texture coordinates for a face Returns a Surface with vertices, texcoords, and texinfo_index



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# File 'lib/quake/bsp/face_vertices.rb', line 23

def self.extract_surface(level, face)
  texinfo = level.texinfo[face.texinfo_index]
  texture = level.textures[texinfo.miptex_index] if texinfo

  verts = Array.new(face.num_edges)
  texcoords = Array.new(face.num_edges)

  tex_w = (texture&.width || 64).to_f
  tex_h = (texture&.height || 64).to_f

  face.num_edges.times do |i|
    surfedge = level.surfedges[face.first_edge + i]
    if surfedge >= 0
      edge = level.edges[surfedge]
      v = level.vertices[edge.v0]
    else
      edge = level.edges[-surfedge]
      v = level.vertices[edge.v1]
    end

    verts[i] = v

    if texinfo
      u = v.dot(texinfo.s_vec) + texinfo.s_offset
      u /= tex_w

      t = v.dot(texinfo.t_vec) + texinfo.t_offset
      t /= tex_h

      texcoords[i] = [u, t]
    else
      texcoords[i] = [0.0, 0.0]
    end
  end

  Surface.new(vertices: verts, texcoords: texcoords,
              texinfo_index: face.texinfo_index)
end