73 lines
2.6 KiB
JavaScript
73 lines
2.6 KiB
JavaScript
// Radius must stay well outside the floor's footprint (a 20x20 plane has a
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// corner-to-center distance of 10*sqrt(2) =~ 14.1) -- orbiting inside that
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// puts parts of the floor's own geometry near/behind the camera's view
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// direction, which the PSP's legacy GU pipeline can't clip properly and
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// drops the whole triangle instead of clipping it.
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var CAMERA_ORBIT_RADIUS = 18.0;
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var CAMERA_ORBIT_HEIGHT = 10.0;
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var CAMERA_ORBIT_SPEED = 0.5;
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var cameraOrbitAngle = 0.0;
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var cameraPosition = null;
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// Orbits the camera around the world origin at a fixed radius/height/
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// speed, always looking back at the origin. Called once up front (so the
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// very first rendered frame is already positioned correctly) and then
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// once per frame via update() below.
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function updateCameraOrbit() {
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cameraOrbitAngle += Time.delta * CAMERA_ORBIT_SPEED;
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var eyeX = Math.cos(cameraOrbitAngle) * CAMERA_ORBIT_RADIUS;
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var eyeY = CAMERA_ORBIT_HEIGHT;
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var eyeZ = Math.sin(cameraOrbitAngle) * CAMERA_ORBIT_RADIUS;
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cameraPosition.lookAt(eyeX, eyeY, eyeZ, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
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}
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// Called once per engine frame (see engineUpdate() -> scriptManagerCall
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// Global("update")).
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function update() {
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if(cameraPosition) updateCameraOrbit();
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}
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(function setup() {
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var scene = new Scene();
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scene.setActive();
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// Camera, orbiting the origin (see updateCameraOrbit above).
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var camera = new Entity();
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cameraPosition = camera.add(POSITION);
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camera.add(CAMERA);
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updateCameraOrbit();
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// Static ground plane. Physics ignores the entity's position component --
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// the shape's own normal/distance fully define the plane in world space.
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var plane = new Entity();
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var planePosition = plane.add(POSITION);
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planePosition.setLocalPosition(-10.0, 0.0, -10.0);
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planePosition.setLocalScale(20.0, 1.0, 20.0);
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var planePhysics = plane.add(PHYSICS);
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planePhysics.setBodyType(PHYSICS_BODY_STATIC);
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planePhysics.setShape(PHYSICS_SHAPE_PLANE, 0.0, 1.0, 0.0, 0.0);
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var planeRenderable = plane.add(RENDERABLE);
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planeRenderable.setMesh(0, MESH_PLANE);
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planeRenderable.setColor(128, 128, 128, 255);
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// Player: dynamic capsule body, moved relative to the camera by
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// PLAYER's own update callback (see entityplayer.c).
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var player = new Entity();
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var playerPosition = player.add(POSITION);
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playerPosition.setLocalPosition(0.0, 2.0, 0.0);
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var playerPhysics = player.add(PHYSICS);
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playerPhysics.setShape(PHYSICS_SHAPE_CAPSULE, 0.5, 0.5);
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var playerRenderable = player.add(RENDERABLE);
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playerRenderable.setMesh(0, MESH_CAPSULE);
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playerRenderable.setColor(0, 0, 255, 255);
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player.add(PLAYER);
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})();
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