In geometry a vertex is a point defining the corners of polygons or intersections of lines. A triangle for example is defined by 3 vertices with lines between them. In 3D-graphical APIs like OpenGL and Direct3D a vertex is a data structure containing information about the positions, normals, ...
3
votes
1answer
366 views
Count number of Vertices in VertexBuffer in XNA 3.1
Where in XNA 4.0 one can go:
myVertexBuffer.VertexCount;
What is the best way to count the number of vertices in 3.1 for a dynamic buffer (i.e. where I do not know the number of elements that ...
1
vote
1answer
282 views
Output from vertex shader in D3D9
I've been looking at creating some 2D rendering systems in D3D9, basically because I don't like ID3DXSprite. For the output of the vertex shader, what co-ordinate system does the run-time expect ...
4
votes
3answers
934 views
OpenGL Vertex Attributes - Normalisation
Alas, I have searched, and have found no definitive answer.
When would you normalize the vertex data in OpenGL using the following command:
glVertexAttribPointer(index, size, type, normalize, ...
5
votes
2answers
857 views
What is the purpose of a Direct3D vertex layout?
This tutorial (msdn) gives a description of a vertex layout.
This is an example of a input layout:
D3D11_INPUT_ELEMENT_DESC layout[] =
{
{ "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, ...
