IndexBuffer() with int32 instead of ushort

[laurentchougrani]

Hello I've been working and playing with this project, it is great. I need to use large meshes (more than 2^16 indexes), and i have encontered the limit of IndexBuffer wich needs only ushort... I would thus need to use int32 or uint. Does anyone know how to process to get uint ou int32 in the IndexBuffer?

[wo80]

You could use an extension method, like

public static void SetData(this IndexBuffer buffer, OpenGL gl, uint[] rawData)
{
	// Get handle to raw data.
	var hData = GCHandle.Alloc(rawData, GCHandleType.Pinned);

	int size = sizeof(uint) * rawData.Length;

	gl.BufferData(OpenGL.GL_ELEMENT_ARRAY_BUFFER, size, hData.AddrOfPinnedObject(), OpenGL.GL_STATIC_DRAW);

	// Free handle.
	hData.Free();
}

[laurentchougrani]

Thank you. I have already managed to do so, I can now load large meshes with just a little drop of FPS (about 10). This should be integrated in SharpGL sources I guess. Here is an example of a large mesh I have loaded thank to my update. [image: Images intégrées 1] FPS: 40. Indices: 1817004 Triangles : 605668 Load time : about 3-4sec

have a nice day

2017-09-04 14:25 GMT+02:00 wo80 [email protected]:

You could use an extension method, like

public static void SetData(this IndexBuffer buffer, OpenGL gl, uint[] rawData) { // Get handle to raw data. var hData = GCHandle.Alloc(rawData, GCHandleType.Pinned);

int size = sizeof(uint) * rawData.Length;

gl.BufferData(OpenGL.GL_ELEMENT_ARRAY_BUFFER, size, hData.AddrOfPinnedObject(), OpenGL.GL_STATIC_DRAW);

// Free handle. hData.Free(); }

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