three-stdlib
Version:
stand-alone library of threejs examples
47 lines (46 loc) • 1.92 kB
JavaScript
;
Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
const THREE = require("three");
const _shadowMatrix = /* @__PURE__ */ new THREE.Matrix4();
class ShadowMesh extends THREE.Mesh {
constructor(mesh) {
const shadowMaterial = new THREE.MeshBasicMaterial({
color: 0,
transparent: true,
opacity: 0.6,
depthWrite: false,
stencilWrite: true,
stencilFunc: THREE.EqualStencilFunc,
stencilRef: 0,
stencilZPass: THREE.IncrementStencilOp
});
super(mesh.geometry, shadowMaterial);
this.isShadowMesh = true;
this.meshMatrix = mesh.matrixWorld;
this.frustumCulled = false;
this.matrixAutoUpdate = false;
}
update(plane, lightPosition4D) {
const dot = plane.normal.x * lightPosition4D.x + plane.normal.y * lightPosition4D.y + plane.normal.z * lightPosition4D.z + -plane.constant * lightPosition4D.w;
const sme = _shadowMatrix.elements;
sme[0] = dot - lightPosition4D.x * plane.normal.x;
sme[4] = -lightPosition4D.x * plane.normal.y;
sme[8] = -lightPosition4D.x * plane.normal.z;
sme[12] = -lightPosition4D.x * -plane.constant;
sme[1] = -lightPosition4D.y * plane.normal.x;
sme[5] = dot - lightPosition4D.y * plane.normal.y;
sme[9] = -lightPosition4D.y * plane.normal.z;
sme[13] = -lightPosition4D.y * -plane.constant;
sme[2] = -lightPosition4D.z * plane.normal.x;
sme[6] = -lightPosition4D.z * plane.normal.y;
sme[10] = dot - lightPosition4D.z * plane.normal.z;
sme[14] = -lightPosition4D.z * -plane.constant;
sme[3] = -lightPosition4D.w * plane.normal.x;
sme[7] = -lightPosition4D.w * plane.normal.y;
sme[11] = -lightPosition4D.w * plane.normal.z;
sme[15] = dot - lightPosition4D.w * -plane.constant;
this.matrix.multiplyMatrices(_shadowMatrix, this.meshMatrix);
}
}
exports.ShadowMesh = ShadowMesh;
//# sourceMappingURL=ShadowMesh.cjs.map