Babylon.js实现物体碰撞检测
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2024-03-16 21:20:46
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Babylon.js实现物体碰撞检测
- 通过
intersectsMesh()api实现物体间碰撞检测 - 通过
intersectsPoint()api实现物体与点间的碰撞检测
代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Babulon</title>
<style>
html,
body {
overflow: hidden;
width: 100%;
height: 100%;
margin: 0;
padding: 0;
}
#renderCanvas {
width: 100%;
height: 100%;
touch-action: none;
}
</style>
</head>
<body>
<script src="https://preview.babylonjs.com/babylon.js"></script>
<script src="https://preview.babylonjs.com/loaders/babylonjs.loaders.min.js"></script>
<script src="https://code.jquery.com/pep/0.4.3/pep.js"></script>
<canvas id="renderCanvas" touch-action="none"></canvas>
<script>
const canvas = document.getElementById("renderCanvas");
const engine = new BABYLON.Engine(canvas, true);
const initScene = () => {
// 场景
const scene = new BABYLON.Scene(engine);
scene.ambientColor = new BABYLON.Color3(1, 1, 1);
// 相机
const camera = new BABYLON.ArcRotateCamera(
"Camera",
Math.PI / 2,
Math.PI / 2,
30,
new BABYLON.Vector3(0, 0, 0),
scene
);
camera.attachControl(canvas, true);
// 灯光
const light1 = new BABYLON.HemisphericLight(
"light1",
new BABYLON.Vector3(0, 1000, 0),
scene
);
const light2 = new BABYLON.HemisphericLight(
"light2",
new BABYLON.Vector3(0, -1000, 0),
scene
);
return {
scene,
camera,
light1,
light2,
};
};
const createScene = (scene) => {
const myBox1 = BABYLON.MeshBuilder.CreateBox(
"myBox1",
{
height: 2,
width: 2,
depth: 2,
faceColors: new Array(6).fill(new BABYLON.Color4(0, 0.5, 0.5, 1)),
},
scene
);
myBox1.position = new BABYLON.Vector3(-5, 0, 0);
const myBox2 = BABYLON.MeshBuilder.CreateBox(
"myBox1",
{
height: 2,
width: 2,
depth: 2,
faceColors: new Array(6).fill(new BABYLON.Color4(0, 1, 1, 1)),
},
scene
);
myBox2.position = new BABYLON.Vector3(5, 0, 0);
const box1Ani = BABYLON.Animation.CreateAndStartAnimation(
"boxscale",
myBox1,
"position.x",
30,
120,
-5,
0
);
const box2Ani = BABYLON.Animation.CreateAndStartAnimation(
"boxscale",
myBox2,
"position.x",
30,
120,
5,
0
);
const animation = () => {
// params2 = false 模糊校验=>边界框bounding box
// params2 = true 真实校验=>定向边界框Oriented Bounding Box
// 物体与物体碰撞
if (myBox1.intersectsMesh(myBox2, false)) {
alert("物体相交了");
console.log("物体相交");
} else {
console.log("物体未相交");
}
// 点与物体碰撞
if (myBox1.intersectsPoint(new BABYLON.Vector3(0, 0, 0))) {
console.log("点相交");
}
};
return { animation };
};
const initRender = (scene, animation) => {
engine.runRenderLoop(function () {
scene.render();
animation();
});
window.addEventListener("resize", function () {
engine.resize();
});
};
(() => {
const { scene } = initScene();
const { animation } = createScene(scene);
initRender(scene, animation);
})();
</script>
</body>
</html>
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