3D Game Programming

mesh.addEventListener('collision', function() {

var list_index = game_items.indexOf(mesh);

game_items.splice(list_index, 1);

scene.remove(mesh);

scoreboard.addPoints(200);

scoreboard.message('Yum!');

setTimeout(function() {scoreboard.clearMessage();}, 2.5* 1000);

});

ground.updateMatrixWorld();

var p = new THREE.Vector3(location.x, location.y, -20);

ground.localToWorld(p);

mesh.position.copy(p);

scene.add(mesh);

return mesh;

}

// Animate motion in the game

function animate() {

requestAnimationFrame(animate);

if (paused) return;

updateCamera();

renderer.render(scene, camera);

}

animate();

// Run physics

function gameStep() {

// Update physics 60 times a second so that motion is smooth

setTimeout(gameStep, 1000/60);

if (paused) return;

updateScore();

checkForGameOver();

scene.simulate();

}

gameStep();

var next_x;

function updateScore() {

if (!next_x) next_x = raft.position.x + 25;

if (raft.position.x > next_x) {

scoreboard.addPoints(10);

next_x = next_x + 25;

}

}

report erratum • discuss

Code: River Rafting • 271

Prepared exclusively for Michael Powell