我能找到的唯一例子是在PlaneGeometry或BoxGeometry上使用的视频纹理。我有一个自定义飞机,我已将视频应用到该飞机。视频播放(颜色改变)并显示缩放比例(看起来像放大了)。
视频在右上角播放,绿色平面是视频所在的自定义几何图形。
三个几何
this.geometry = new THREE.Geometry();
this.geometry.vertices.push(
new THREE.Vector3(900, 0, 840)
new THREE.Vector3(-900, 0, 1200),
new THREE.Vector3(900, 900, 840),
new THREE.Vector3(-900, 900, 1200),
);
this.geometry.faces.push(
new THREE.Face3(0, 1, 2),
new THREE.Face3(1, 3, 2),
);
this.geometry.computeFaceNormals();
this.object = new THREE.Mesh(this.geometry, this._videoMaterial());
视频材料功能
_videoMaterial() {
let videoImage = document.createElement('canvas');
videoImage.width = 480;
videoImage.height = 204;
this.videoImageContext = videoImage.getContext('2d');
this.videoImageContext.fillStyle = '#211e79';
this.videoImageContext.fillRect(0, 0, videoImage.width, videoImage.height);
this.videoTexture = new THREE.Texture(videoImage);
this.videoTexture.minFilter = THREE.LinearFilter;
this.videoTexture.magFilter = THREE.LinearFilter;
this.videoTexture.format = THREE.RGBFormat;
return new THREE.MeshBasicMaterial({
map: this.videoTexture,
overdraw: true,
side: THREE.DoubleSide
});
}
答案 0 :(得分:1)
正如囚犯所说,您需要在几何图形中添加UV,以便知道如何在其表面上绘制纹理
// Add UVs of face 1
this.geometry.faceVertexUvs[0].push([
new THREE.Vector2(0, 0)
new THREE.Vector2(0, 1),
new THREE.Vector2(1, 0)
]);
// Add UVs of face 2
this.geometry.faceVertexUvs[0].push([
new THREE.Vector2(0, 1)
new THREE.Vector2(1, 0),
new THREE.Vector2(1, 1)
]);
this.geometry.uvsNeedUpdate();
您可能需要调整UV的顺序,以使其与脸部上顶点的顺序匹配,但是您需要这样的排列:
https://threejs.org/docs/index.html#api/en/core/Geometry.faceVertexUvs