Class: CyberarmEngine::BoundingBoxRenderer

Inherits:
Object
  • Object
show all
Defined in:
lib/cyberarm_engine/opengl/renderer/bounding_box_renderer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ BoundingBoxRenderer

Returns a new instance of BoundingBoxRenderer.



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# File 'lib/cyberarm_engine/opengl/renderer/bounding_box_renderer.rb', line 5

def initialize
  @bounding_boxes = {}
  @vertex_count = 0
end

Instance Attribute Details

#bounding_boxes ⇒ Object (readonly)

Returns the value of attribute bounding_boxes.



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# File 'lib/cyberarm_engine/opengl/renderer/bounding_box_renderer.rb', line 3

def bounding_boxes
  @bounding_boxes
end

#vertex_count ⇒ Object (readonly)

Returns the value of attribute vertex_count.



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# File 'lib/cyberarm_engine/opengl/renderer/bounding_box_renderer.rb', line 3

def vertex_count
  @vertex_count
end

Instance Method Details

#create_bounding_box(entity, color = nil) ⇒ Object 



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# File 'lib/cyberarm_engine/opengl/renderer/bounding_box_renderer.rb', line 21

def create_bounding_box(entity, color = nil)
  color ||= entity.debug_color
  entity_id = entity.object_id

  if @bounding_boxes[entity_id]
    if @bounding_boxes[entity_id][:color] != color
      @bounding_boxes[entity_id][:colors] = mesh_colors(color).pack("f*")
      @bounding_boxes[entity_id][:color]  = color
      return
    else
      return
    end
  end

  @bounding_boxes[entity_id] = {
    entity: entity,
    color: color,
    objects: []
  }

  box = entity.normalize_bounding_box

  normals  = mesh_normals
  colors   = mesh_colors(color)
  vertices = mesh_vertices(box)

  @vertex_count += vertices.size

  @bounding_boxes[entity_id][:vertices_size] = vertices.size
  @bounding_boxes[entity_id][:vertices]      = vertices.pack("f*")
  @bounding_boxes[entity_id][:normals]       = normals.pack("f*")
  @bounding_boxes[entity_id][:colors]        = colors.pack("f*")

  entity.model.objects.each do |mesh|
    data = {}
    box = mesh.bounding_box.normalize(entity)

    normals  = mesh_normals
    colors   = mesh_colors(mesh.debug_color)
    vertices = mesh_vertices(box)

    @vertex_count += vertices.size

    data[:vertices_size] = vertices.size
    data[:vertices]      = vertices.pack("f*")
    data[:normals]       = normals.pack("f*")
    data[:colors]        = colors.pack("f*")

    @bounding_boxes[entity_id][:objects] << data
  end
end

#draw_bounding_box(bounding_box) ⇒ Object 



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# File 'lib/cyberarm_engine/opengl/renderer/bounding_box_renderer.rb', line 229

def draw_bounding_box(bounding_box)
  glEnableClientState(GL_VERTEX_ARRAY)
  glEnableClientState(GL_COLOR_ARRAY)
  glEnableClientState(GL_NORMAL_ARRAY)

  glVertexPointer(3, GL_FLOAT, 0, bounding_box[:vertices])
  glColorPointer(3, GL_FLOAT, 0, bounding_box[:colors])
  glNormalPointer(GL_FLOAT, 0, bounding_box[:normals])

  glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
  glDisable(GL_LIGHTING)
  glDrawArrays(GL_TRIANGLES, 0, bounding_box[:vertices_size] / 3)
  glEnable(GL_LIGHTING)
  glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)

  glDisableClientState(GL_VERTEX_ARRAY)
  glDisableClientState(GL_COLOR_ARRAY)
  glDisableClientState(GL_NORMAL_ARRAY)
end

#draw_bounding_boxes ⇒ Object 



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# File 'lib/cyberarm_engine/opengl/renderer/bounding_box_renderer.rb', line 213

def draw_bounding_boxes
  @bounding_boxes.each do |key, bounding_box|
    glPushMatrix

    glTranslatef(
      bounding_box[:entity].position.x,
      bounding_box[:entity].position.y,
      bounding_box[:entity].position.z
    )
    draw_bounding_box(bounding_box)
    @bounding_boxes[key][:objects].each { |o| draw_bounding_box(o) }

    glPopMatrix
  end
end

#mesh_colors(color) ⇒ Object 



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# File 'lib/cyberarm_engine/opengl/renderer/bounding_box_renderer.rb', line 120

def mesh_colors(color)
  [
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue,
    color.red, color.green, color.blue
  ]
end

#mesh_normals ⇒ Object 



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# File 'lib/cyberarm_engine/opengl/renderer/bounding_box_renderer.rb', line 73

def mesh_normals
  [
    0, 1, 0,
    0, 1, 0,
    0, 1, 0,
    0, 1, 0,
    0, 1, 0,
    0, 1, 0,

    0, -1, 0,
    0, -1, 0,
    0, -1, 0,
    0, -1, 0,
    0, -1, 0,
    0, -1, 0,

    0, 0, 1,
    0, 0, 1,
    0, 0, 1,
    0, 0, 1,
    0, 0, 1,
    0, 0, 1,

    1, 0, 0,
    1, 0, 0,
    1, 0, 0,
    1, 0, 0,
    1, 0, 0,
    1, 0, 0,

    -1, 0, 0,
    -1, 0, 0,
    -1, 0, 0,
    -1, 0, 0,
    -1, 0, 0,
    -1, 0, 0,

    -1, 0, 0,
    -1, 0, 0,
    -1, 0, 0,

    -1, 0, 0,
    -1, 0, 0,
    -1, 0, 0
  ]
end

#mesh_vertices(box) ⇒ Object 



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# File 'lib/cyberarm_engine/opengl/renderer/bounding_box_renderer.rb', line 161

def mesh_vertices(box)
  [
    box.min.x, box.max.y, box.max.z,
    box.min.x, box.max.y, box.min.z,
    box.max.x, box.max.y, box.min.z,

    box.min.x, box.max.y, box.max.z,
    box.max.x, box.max.y, box.max.z,
    box.max.x, box.max.y, box.min.z,

    box.max.x, box.min.y, box.min.z,
    box.max.x, box.min.y, box.max.z,
    box.min.x, box.min.y, box.max.z,

    box.max.x, box.min.y, box.min.z,
    box.min.x, box.min.y, box.min.z,
    box.min.x, box.min.y, box.max.z,

    box.min.x, box.max.y, box.max.z,
    box.min.x, box.max.y, box.min.z,
    box.min.x, box.min.y, box.min.z,

    box.min.x, box.min.y, box.max.z,
    box.min.x, box.min.y, box.min.z,
    box.min.x, box.max.y, box.max.z,

    box.max.x, box.max.y, box.max.z,
    box.max.x, box.max.y, box.min.z,
    box.max.x, box.min.y, box.min.z,

    box.max.x, box.min.y, box.max.z,
    box.max.x, box.min.y, box.min.z,
    box.max.x, box.max.y, box.max.z,

    box.min.x, box.max.y, box.max.z,
    box.max.x, box.max.y, box.max.z,
    box.max.x, box.min.y, box.max.z,

    box.min.x, box.max.y, box.max.z,
    box.max.x, box.min.y, box.max.z,
    box.min.x, box.min.y, box.max.z,

    box.max.x, box.min.y, box.min.z,
    box.min.x, box.min.y, box.min.z,
    box.min.x, box.max.y, box.min.z,

    box.max.x, box.min.y, box.min.z,
    box.min.x, box.max.y, box.min.z,
    box.max.x, box.max.y, box.min.z
  ]
end

#render(entities) ⇒ Object 



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# File 'lib/cyberarm_engine/opengl/renderer/bounding_box_renderer.rb', line 10

def render(entities)
  entities.each do |entity|
    create_bounding_box(entity, color = nil)
    draw_bounding_boxes
  end

  (@bounding_boxes.keys - entities.map { |e| e.object_id }).each do |key|
    @bounding_boxes.delete(key)
  end
end