三种方式防止DataTexture值归一化
Prevent DataTexture value normalization in THREE
在三个中，您可以指定具有给定数据类型和格式的 DataTexture。我的着色器管道 规范化 基于一些用户控制的制服的原始值。
如果是Float32Array，就很简单了：
data = new Float32Array(...)
texture = new THREE.DataTexture(data, columns, rows, THREE.LuminanceFormat, THREE.FloatType)
而且，在着色器中，混合后的值具有 非规范化 值。但是，如果我使用：
data = new Uint8Array(...)
texture = new THREE.DataTexture(data, columns, rows, THREE.LuminanceFormat, THREE.UnsignedByteType);
然后纹理在 0.0 和 1.0 之间标准化，作为管道的输入。不是我所期待的。有没有办法防止这种行为？
这是一个 jsfiddle 示例，演示了对意外情况的快速测试（至少对我而言）：http://jsfiddle.net/VsWb9/3796/
three.js r.71
为了将来参考，这在 WebGL 中目前是不可能的。它需要使用 GL_RED_INTEGER 和不受支持的 usampler2d.
来自 the internalformat of Texture 的评论也描述了 GL 中的内部格式问题。
For that matter, the format of GL_LUMINANCE says that you're passing
either floating-point data or normalized integer data (the type says
that it's normalized integer data). Of course, since there's no
GL_LUMINANCE_INTEGER (which is how you say that you're passing integer
data, to be used with integer internal formats), you can't really use
luminance data like this.
Use GL_RED_INTEGER for the format and GL_R8UI for the internal format
if you really want 8-bit unsigned integers in your texture. Note that
integer texture support requires OpenGL 3.x-class hardware.
That being said, you cannot use sampler2D with an integer texture. If
you are using a texture that uses an unsigned integer texture format,
you must use usampler2D.
在三个中，您可以指定具有给定数据类型和格式的 DataTexture。我的着色器管道 规范化 基于一些用户控制的制服的原始值。
如果是Float32Array，就很简单了：
data = new Float32Array(...)
texture = new THREE.DataTexture(data, columns, rows, THREE.LuminanceFormat, THREE.FloatType)
而且，在着色器中，混合后的值具有 非规范化 值。但是，如果我使用：
data = new Uint8Array(...)
texture = new THREE.DataTexture(data, columns, rows, THREE.LuminanceFormat, THREE.UnsignedByteType);
然后纹理在 0.0 和 1.0 之间标准化，作为管道的输入。不是我所期待的。有没有办法防止这种行为？
这是一个 jsfiddle 示例，演示了对意外情况的快速测试（至少对我而言）：http://jsfiddle.net/VsWb9/3796/
three.js r.71
为了将来参考，这在 WebGL 中目前是不可能的。它需要使用 GL_RED_INTEGER 和不受支持的 usampler2d.
来自 the internalformat of Texture 的评论也描述了 GL 中的内部格式问题。
For that matter, the format of GL_LUMINANCE says that you're passing either floating-point data or normalized integer data (the type says that it's normalized integer data). Of course, since there's no GL_LUMINANCE_INTEGER (which is how you say that you're passing integer data, to be used with integer internal formats), you can't really use luminance data like this.
Use GL_RED_INTEGER for the format and GL_R8UI for the internal format if you really want 8-bit unsigned integers in your texture. Note that integer texture support requires OpenGL 3.x-class hardware.
That being said, you cannot use sampler2D with an integer texture. If you are using a texture that uses an unsigned integer texture format, you must use usampler2D.