sys_camera

Update the PV matrix of the camera.

import {mat4_copy, mat4_get_translation, mat4_multiply} from "../../lib/mat4.js"; import {Entity} from "../../lib/world.js"; import {CameraCanvas, CameraKind, CameraTarget} from "../components/com_camera.js"; import {Game} from "../game.js"; import {Has} from "../world.js";

export function sys_camera(game: Game, delta: number) { game.Cameras = []; for (let ent = 0; ent < game.World.Signature.length; ent++) { if ((game.World.Signature[ent] & QUERY) === QUERY) { let camera = game.World.Camera[ent]; let transform = game.World.Transform[ent]; mat4_copy(camera.World, transform.World); switch (camera.Kind) { case CameraKind.Canvas: case CameraKind.Target: update_camera(game, ent, camera); game.Cameras.push(ent); break; } } } }

function update_camera(game: Game, entity: Entity, camera: CameraCanvas | CameraTarget) { let transform = game.World.Transform[entity]; let projection = camera.Projection; mat4_multiply(camera.Pv, projection.Projection, transform.Self); mat4_get_translation(camera.Position, transform.World); }