Class virtual Application.renderer

class virtual renderer : object .. end

Renders stuff.

The basic renderer is Application.camera_perspective_renderer, which renders a scene graph (Scene.scene_node) from the perspective of a given camera (Scene.camera).

Renderers can be layered using Application.overlay_renderer, like having a 2d console or border on top of a 3d scene.

Multiple renderers can be used to paint different parts of the screen, using Application.column_renderer. Four different views (top, side, front, and 3d perspective) of a scene could be implemented with this.

Application.ortho_pixel_renderer uses world-coordinates that correspond with screen pixel coordinates, useful for traditional 2d graphics.

Implementation notes: Renderers render to the opengl backbuffer, using ordinary opengl commands. They shouldn't call SdlGl.swap_buffers, Gl.clear or anything. Callers, like display_singleton#render (Application.display_singleton_type.render), may choose to clear the color and depth buffers before calling #render.

Set the renderer for the actual display by calling display_singleton#set_renderer (Application.display_singleton_type.set_renderer).

See:

method virtual set_viewport : x:int -> y:int -> width:int -> height:int -> unit

Sets the location on the screen to render to.

method virtual render : Scene.render_context -> unit

Renders to the screen.