Class: Engine::Components::FontRendererBase

Inherits:
Engine::Component show all
Defined in:
lib/engine/components/renderers/font_renderer_base.rb

Direct Known Subclasses

FontRenderer, UI::FontRenderer

Instance Attribute Summary collapse

Attributes inherited from Engine::Component

#game_object

Instance Method Summary collapse

Methods inherited from Engine::Component

#_erase!, #destroy, #destroy!, #destroyed?, destroyed_components, erase_destroyed_components, method_added, #renderer?, #set_game_object, #ui_renderer?, #update

Methods included from Serializable

allowed_class?, get_class, included, register_class, #uuid

Instance Attribute Details

#mesh ⇒ Object (readonly)

Returns the value of attribute mesh.



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# File 'lib/engine/components/renderers/font_renderer_base.rb', line 7

def mesh
  @mesh
end

#texture ⇒ Object (readonly)

Returns the value of attribute texture.



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# File 'lib/engine/components/renderers/font_renderer_base.rb', line 7

def texture
  @texture
end

Instance Method Details

#awake ⇒ Object 



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# File 'lib/engine/components/renderers/font_renderer_base.rb', line 9

def awake
  # Original vertex order for ear-clipping, UVs flipped for Y-down camera
  @mesh = Engine::PolygonMesh.new(
    [Vector[-0.5, 0.5], Vector[0.5, 0.5], Vector[0.5, -0.5], Vector[-0.5, -0.5]],
    [[0, 1], [1, 1], [1, 0], [0, 0]]
  )
  @texture = @font.texture.texture
end

#draw ⇒ Object 



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# File 'lib/engine/components/renderers/font_renderer_base.rb', line 30

def draw
  shader.use
  Engine::GL.BindVertexArray(@vao)
  Engine::GL.BindBuffer(Engine::GL::ELEMENT_ARRAY_BUFFER, @ebo)

  set_shader_per_frame_data

  Engine::GL.DrawElementsInstanced(Engine::GL::TRIANGLES, mesh.index_data.length, Engine::GL::UNSIGNED_INT, 0, @string.length)
end

#start ⇒ Object 



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# File 'lib/engine/components/renderers/font_renderer_base.rb', line 18

def start
  setup_vertex_attribute_buffer
  setup_vertex_buffer
  setup_index_buffer
  Engine::GL.BindVertexArray(0)
end

#update_string(string) ⇒ Object 



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# File 'lib/engine/components/renderers/font_renderer_base.rb', line 25

def update_string(string)
  @string = string
  update_vbo_buf
end