从threejs中的数组生成纹理 [英] generate texture from array in threejs

问题描述

我正在尝试从threeJS中的数组生成纹理，但它没有按预期工作。

I am trying to generate a texture from an array in threeJS and it is not working as expected.

看来我生成纹理的方式不正确。

It appears that the way I generate the texture is not correct.

如果我使用以下纹理，它会按预期工作。
http://www.html5canvastutorials.com/demos/assets/crate。 jpg

If I use the following texture, it works as expected. http://www.html5canvastutorials.com/demos/assets/crate.jpg

crateTex = THREE.ImageUtils.loadTexture（'data / crate.jpg'）;

如果我生成一个虚拟纹理并尝试显示它，它全部都是黑色...

If I generate a dummy texture and try to display it, it is all black...

var dummyRGBA = new Uint8Array(4 * 4 * 4);
for(var i=0; i< 4 * 4; i++){
  // RGB from 0 to 255
  dummyRGBA[4*i] = dummyRGBA[4*i + 1] = dummyRGBA[4*i + 2] = 255*i/(4*4);
  // OPACITY
  dummyRGBA[4*i + 3] = 255;
}

dummyDataTex = new THREE.DataTexture( dummyRGBA, 4, 4, THREE.RGBAFormat );
dummyDataTex.needsUpdate = true;

dummyTex = new THREE.Texture(dummyDataTex);

推荐答案

我认为你的错误在于你制作纹理纹理。

I think your mistake is in the fact that you make a texture of a texture.

当你这样做时：

dummyDataTex = new THREE.DataTexture( dummyRGBA, 4, 4, THREE.RGBAFormat );

您在此处创建的对象 dummyDataTex 是已经类型 THREE.Texture 。

the object dummyDataTex that you create here is already of type THREE.Texture.

所以你的下一步：

dummyTex = new THREE.Texture(dummyDataTex);

不是必需的。你应该立即使用 dummyDataTex 。

is not necessary. You should instead immediately use dummyDataTex.

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