module SF::Drawable

Overview

Abstract module for objects that can be drawn to a render target

SF::Drawable is a very simple module that allows objects of derived classes to be drawn to a SF::RenderTarget.

All you have to do in your derived class is to implement the #draw function.

Note that including SF::Drawable is not mandatory, but it allows this nice syntax window.draw(object) rather than object.draw(window), which is more consistent with other SFML classes.

Example:

class MyDrawable
  include SF::Drawable
  def draw(target : SF::RenderTarget, states : SF::RenderStates)
    # You can draw other high-level objects
    target.draw(@sprite, states)

    # ... or use the low-level API
    states.texture = @texture
    target.draw(@vertices, states)

    # ... or draw with OpenGL directly
    glBegin(GL_QUADS)
    ...
    glEnd()
  end

  @sprite : SF::Sprite
  @texture : SF::Texture
  @vertices : SF::VertexArray
end

See also: SF::RenderTarget

Direct including types

• SF::Shape
• SF::Sprite
• SF::Text
• SF::VertexArray
• SF::VertexBuffer

Defined in:

graphics/graphics.cr
graphics/obj.cr

Instance Method Summary

• #draw(target : RenderTarget, states : RenderStates)

  Draw the object to a render target.

Instance Method Detail