MonoTouch OpenTK和UniformMatrix4 [英] MonoTouch OpenTK and UniformMatrix4

问题描述

我正在尝试将OpenTK Matrix4传递给着色器统一体，但是GL.UniformMatrix4似乎没有合适的重载.重载接受float或float[]或ref float.同样，我找不到将Matrix4实例转换为浮点数组的方法-我已经看到一个示例，该示例在Matrix4上使用ToArray方法，但似乎在我使用的发行版中不存在.

I'm trying to pass an OpenTK Matrix4 to a shader uniform, but there doesn't seem to be a suitable overload for GL.UniformMatrix4. The overloads accept either float or float[] or ref float. Similarly I can't find a way to convert a Matrix4 instance to a float array - I've seen one sample that uses a ToArray method on the Matrix4, but that doesn't seem to be present in the distribution I'm using.

当然，我缺少一些简单的东西，因为这对于将模型/视图/投影矩阵传递给着色器非常重要.

Sure I'm missing something simple as this is pretty fundamental to being able to pass a model/view/projection matrix to a shader.

我将OpenTK附带的版本与MonoTouch的最新版本一起使用.

I'm using the version of OpenTK shipping with the lastest version of MonoTouch.

推荐答案

此帮助程序功能有效，但似乎很容易破解.

This helper function works, but seems like a hack.

基本上，它只是传递Row0，Col0的地址.由于C#不能保证结构中字段的顺序，因此从理论上讲，运气比什么都重要.

Basically it's just passing the address of Row0,Col0. Since C# makes no guarantees about the order of fields in a structure though, theoretically it's working by luck more than anything.

public static void UniformMatrix4(int location, Matrix4 value)
{
    GL.UniformMatrix4(location, 1, false, ref value.Row0.X);
}

当然，OpenTK应该具有允许直接传递Matrix4的绑定.

Surely OpenTK should have bindings to allowing passing a Matrix4 directly.

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