Class: GlTail::Engine

Inherits:
Object
  • Object
show all
Defined in:
lib/gl_tail/engine.rb

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ Engine

Returns a new instance of Engine.



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# File 'lib/gl_tail/engine.rb', line 200

def initialize(config)
  @config = config

  @frames = 0
  @t0 = 0
  @left_left = @left_right = @right_left = @right_right = 0.0 # TODO: Why is draw called before these are set by reshape?
end

Instance Method Details

#char_size ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 16

def char_size
  @char_size ||= (8.0 / (@config.screen.window_width / 2.0))
end

#do_process ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 256

def do_process
  active = @config.do_process

  if active >= 0

    if glutGet(GLUT_ELAPSED_TIME) - @since >= 1000
      @since = glutGet(GLUT_ELAPSED_TIME)
      @config.update
      BlobStore.prune
    end
  end

  self
end

#draw ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 36

def draw
  @render_time ||= 0
  @t = Time.new

  glClear(GL_COLOR_BUFFER_BIT);
  #    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

  glPushMatrix()

  positions = Hash.new

  reset_stats

  glPushMatrix()

  glColor([0.15, 0.15, 0.15, 1.0])
  glBegin(GL_QUADS)
    glNormal3f(1.0, 1.0, 0.0)

    glVertex3f(@left_left, @config.screen.aspect, 0.0)
    glVertex3f(@left_right, @config.screen.aspect, 0.0)
    glVertex3f(@left_right, -@config.screen.aspect, 0.0)
    glVertex3f(@left_left, -@config.screen.aspect, 0.0)

    glVertex3f(@right_left, @config.screen.aspect, 0.0)
    glVertex3f(@right_right, @config.screen.aspect, 0.0)
    glVertex3f(@right_right, -@config.screen.aspect, 0.0)
    glVertex3f(@right_left, -@config.screen.aspect, 0.0)

  glEnd()
  glPopMatrix()

  # TODO: do we really need to sort every block on every draw?!
  # Nope. But it was a hash, so keeping order was a bit hard.
  @config.blocks.sort { |k,v| k.order <=> v.order}.each do |block|
    # glPushMatrix + glTranslate3f to render each element relativ to its containing block instead of the screen?
    positions[block.is_right] = block.render(self, positions[block.is_right] || 0 )
  end

  glPopMatrix()

  @frames += 1
  t = glutGet(GLUT_ELAPSED_TIME)
  if t - @t0 >= 10000
    seconds = (t - @t0) / 1000.0
    $FPS = @frames / seconds
    printf("%d frames in %6.3f seconds = %6.3f FPS\n",
    @frames, seconds, $FPS) if $VRB > 0
    @t0, @frames = t, 0
    puts "Elements[#{stats[0]}], Activities[#{stats[1]}], Blobs[#{BlobStore.used}/#{BlobStore.size}]" if $VRB > 0
  end
  @render_time = (Time.new - @t)
end

#highlight_color ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 24

def highlight_color
  @config.screen.highlight_color
end

#idle ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 90

def idle
  @last_run ||= Time.new
  @last_run_time ||= 0
  delta = (Time.new - @last_run) - @last_run_time
  if @config.screen.wanted_fps > 0 && delta < (1000.0/(@config.screen.wanted_fps*1000.0))
    sleep((1000.0/(@config.screen.wanted_fps*1000.0) - delta))
  end
  @last_run = Time.new
  glutPostRedisplay()
  glutSwapBuffers()
  do_process
  @last_run_time = (@last_run_time.to_f * (@config.screen.wanted_fps-1.0) + (Time.new - @last_run).to_f) / @config.screen.wanted_fps.to_f if @config.screen.wanted_fps > 0
end

#key(k, x, y) ⇒ Object

Change view angle, exit upon ESC



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# File 'lib/gl_tail/engine.rb', line 115

def key(k, x, y)
  case k
  when 27 # Escape
    exit
  when 32 # Space
    @config.screen.bounce ||= false
    @config.screen.bounce = !@config.screen.bounce
  when 102 #f
    @config.screen.wanted_fps = case @config.screen.wanted_fps
                                when 0
                                  60
                                when 60
                                  50
                                when 50
                                  45
                                when 45
                                  30
                                when 30
                                  25
                                when 25
                                  20
                                when 20
                                  0
                                end
    puts "WANTED_FPS[#{@config.screen.wanted_fps}]"
  when 98
    @config.screen.mode = 1 - @config.screen.mode.to_i
    BlobStore.empty
  end
  puts "Keypress: #{k}"
  glutPostRedisplay()
end

#line_size ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 20

def line_size
  @config.screen.line_size
end

#motion(x, y) ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 194

def motion(x, y)
  if @mouse == GLUT_DOWN then
  end
  @x0, @y0 = x, y
end

#mouse(button, state, x, y) ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 189

def mouse(button, state, x, y)
  @mouse = state
  @x0, @y0 = x, y
end

#render_string(left, right = nil) ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 8

def render_string(left,right = nil)
  FontStore.render_string(self, left,right)
end

#reset_stats ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 28

def reset_stats
  @stats = [0, 0]
end

#reshape(width, height) ⇒ Object

New window size or exposure



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# File 'lib/gl_tail/engine.rb', line 154

def reshape(width, height)
  @config.reshape(width, height)

  # reset char size
  @char_size = nil

  @left_left = @config.screen.left.alignment + char_size * (@config.screen.left.size + 1)
  @left_right = @config.screen.left.alignment + char_size * (@config.screen.left.size + 8)

  @right_left = @config.screen.right.alignment - char_size * (@config.screen.right.size + 1)
  @right_right = @config.screen.right.alignment - char_size * (@config.screen.right.size + 8)

  glViewport(0, 0, width, height)
  glMatrixMode(GL_PROJECTION)
  glLoadIdentity()

  #    glFrustum(-1.0, 1.0, [email protected], @config.screen.aspect, 5.0, 60.0)
  glOrtho(-1.0, 1.0, -@config.screen.aspect, @config.screen.aspect, -1.0, 1.0)

  @config.screen.line_size = @config.screen.aspect * 2 / (@config.screen.window_height/13.0)
  @config.screen.top = @config.screen.aspect - @config.screen.line_size

  puts "Reshape: #{width}x#{height} = #{@config.screen.aspect}/#{@config.screen.line_size}" if $VRB > 0

  glMatrixMode(GL_MODELVIEW)
  glLoadIdentity()
  glTranslate(0.0, 0.0, 0.0)

  BlobStore.empty # Flush cached objects to recreate with correct size
end

#screen ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 12

def screen
  @config.screen
end

#special(k, x, y) ⇒ Object

Change view angle



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# File 'lib/gl_tail/engine.rb', line 149

def special(k, x, y)
  glutPostRedisplay()
end

#start ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 208

def start
  glutInit()
  glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE)

  glutInitWindowPosition(0, 0)
  glutInitWindowSize(@config.screen.window_width, @config.screen.window_height)
  glutCreateWindow('glTail')

  glutDisplayFunc(method(:draw).to_proc)
  glutReshapeFunc(method(:reshape).to_proc)
  glutKeyboardFunc(method(:key).to_proc)
  glutSpecialFunc(method(:special).to_proc)
  glutVisibilityFunc(method(:visible).to_proc)
  glutMouseFunc(method(:mouse).to_proc)
  glutMotionFunc(method(:motion).to_proc)

  glutIdleFunc(method(:idle).to_proc)
  #    glutTimerFunc(33, method(:timer).to_proc, 0)

  glLightfv(GL_LIGHT0, GL_POSITION, [5.0, 5.0, 0.0, 0.0])
  glLightfv(GL_LIGHT0, GL_AMBIENT, [0,0,0,1])

  glLightModel(GL_LIGHT_MODEL_AMBIENT, [0.1,0.1,0.1,1]);
#      glLightModel(GL_LIGHT_MODEL_LOCAL_VIEWER, 1);
#      glLightModel(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);

  glDisable(GL_CULL_FACE)
  glEnable(GL_LIGHTING)
  glEnable(GL_LIGHT0)
  glEnable(GL_TEXTURE_2D)
#      glShadeModel(GL_FLAT)
  glDisable(GL_DEPTH_TEST)
#      glDisable(GL_NORMALIZE)
#      glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST)
  glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST )

  glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE)
  glEnable(GL_COLOR_MATERIAL)
  glEnable(GL_NORMALIZE)
  FontStore.generate_font

  @since = glutGet(GLUT_ELAPSED_TIME)

  @config.init

  glutMainLoop()
end

#stats ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 32

def stats
  @stats
end

#timer(value) ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 104

def timer(value)
  glutTimerFunc(15, method(:timer).to_proc, 0)
  #    t = glutGet(GLUT_ELAPSED_TIME)
  glutPostRedisplay()
  glutSwapBuffers()
  do_process
  #    t = glutGet(GLUT_ELAPSED_TIME) - t
  #    t = 14 if t > 14
end

#visible(vis) ⇒ Object 



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# File 'lib/gl_tail/engine.rb', line 185

def visible(vis)
  #    glutIdleFunc((vis == GLUT_VISIBLE ? method(:idle).to_proc : nil))
end