Changelog

[0.2.2]

Added

• Cauldron3D.Paint.Spans: textured, shaded, lit-surface and tinted runs filled in C, with the same bytes made in Elixir where the C did not build.
• Cauldron3D.Frame.Pixels: lay/2 and through/2 over whole RGBA runs, in C likewise.
• Cauldron3D.Texture.colour/2: one colour of a colour table.

Changed

• Each band of Cauldron3D.Render.draw_setups/3 is given only the setups crossing its rows.
• Cauldron3D.Bsp.Draw.polygons/3 looks each face's surface up once a frame and dedups faces by face and mip.

Breaking changes

• Cauldron3D.Texture.colours/1 and a texture's colours are a 1024-byte RGBA binary, not a tuple of 256 binaries; read a colour with Cauldron3D.Texture.colour/2.
• Cauldron3D.Bsp.Surfaces.cached/5 answers {:ok, {index, mip}, surface}.
• The package builds C with elixir_make.

[0.2.0]

Added

• Cauldron3D.Camera and Cauldron3D.View: perspective and orthographic cameras, with first-person, follow, side-on and top-down set-ups, fitted to a picture and its pixel shape.
• Cauldron3D.Render, Setup, Raster and Paint: polygons drawn into an indexed-colour Cauldron3D.Frame, each row resolved into runs of the nearest polygon, bands of rows drawn in parallel; flat, textured, light-table, per-vertex shaded, surface, liquid, sky and game-defined paints; see-through and always-on-top polygons.
• Full colour: Render.draw/3 with :palette draws RGBA frames (Cauldron3D.Paint.Rgba); textures may carry their own palette or be RGBA; surfaces are built from grey or red-green-blue lightmaps (Bsp.light_channels) through a :curve; polygons blend by alpha or add (Polygon.blend); Frame.blit/4 and scale/3 take RGBA frames.
• :masked texture kind, {:skybox, faces} paint and Bsp.Draw's :skybox option; brush models drawn turned ({model, origin, angles}).
• Cauldron3D.Mesh (keyframed, blended, lit by normals) and Cauldron3D.Billboard.
• Cauldron3D.Bsp, Bsp.Face, Bsp.Draw and Bsp.Surfaces: BSP worlds, what a leaf can see, faces drawn with lightmapped surfaces made in parallel and cached per mip level. Bsp.visible_leaves/2 gives world leaves only (Bsp.world_leaves), never a brush model's. Bsp.game names the game a map was made for, :quake or :half_life.
• Cauldron3D.Bsp.Light, the light under a point, and Bsp.Light.on_face/4, a face's lightmap light at a point on it.
• Cauldron3D.Quat and Cauldron3D.Skeleton (bone transforms from parent-relative poses).
• Cauldron3D.Hull (point and box hulls, traces) and Cauldron3D.Move (sliding, stepping).
• Cauldron3D.Texture, Cauldron3D.Frame (rgba/2, rgb/2, blit/4, scale/3) and Cauldron3D.Vec.