3D Game Programming

renderer.render(scene, camera);

}

animate();

functionwalk() {

if(!isWalking())return;

varposition = Math.sin(clock.getElapsedTime()*5) * 50;

right_hand.position.z = position;

left_hand.position.z = -position;

right_foot.position.z = -position;

left_foot.position.z = position;

}

varis_cartwheeling = false;

varis_flipping = false;

functionacrobatics() {

if(is_cartwheeling) {

avatar.rotation.z = avatar.rotation.z + 0.05;

}

if(is_flipping) {

avatar.rotation.x = avatar.rotation.x + 0.05;

}

}

varis_moving_right, is_moving_left, is_moving_forward, is_moving_back;

functionisWalking() {

if(is_moving_right)returntrue;

if(is_moving_left)returntrue;

if(is_moving_forward)returntrue;

if(is_moving_back)returntrue;

returnfalse;

}

document.addEventListener('keydown',function(event) {

varcode = event.keyCode;

if(code == 37) { // left

marker.position.x = marker.position.x-5;

is_moving_left = true;

}

if(code == 38) { // up

marker.position.z = marker.position.z-5;

is_moving_forward = true;

}

if(code == 39) { // right

marker.position.x = marker.position.x+5;

is_moving_right = true;

}

if(code == 40) { // down

marker.position.z = marker.position.z+5;

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Code: Moving Hands and Feet • 225

Prepared exclusively for Michael Powell