3D Game Programming

With that, we have a cool-looking river winding its way through the land:

Finally, we define the lid function as the following:

functionaddLid(ground, size) {

varlid =newPhysijs.ConvexMesh(

newTHREE.CubeGeometry(size, size, 1),

newTHREE.MeshBasicMaterial({visible:false})

);

ground.add(lid);

}

This invisible lid is an easy addition to keep our raft from jumping the river

banks. Speaking of the raft, we’ll add that next.

20.4 Build a Raft for Racing

A donut shape will work very nicely as a river raft. Add the addRaft() call to the

code outline at the top:

addSunlight(scene);

varscoreboard = addScoreboard();

varriver = addRiver(scene);

varraft = addRaft(scene);

Now, after the last of the river code, which should be addLid(), we start addRaft()

like this:

functionaddRaft(scene) {

varmesh =newPhysijs.ConvexMesh(

newTHREE.TorusGeometry(2, 0.5, 8, 20),

Physijs.createMaterial(

newTHREE.MeshPhongMaterial({

emissive: 0xcc2222,

specular: 0xeeeeee

report erratum • discuss

Build a Raft for Racing • 195

Prepared exclusively for Michael Powell