public static int BindVertexBuffer(Vertex[] vertexData, int vboID = -1)
{
if (vboID == -1)
{
GL.GenBuffers(1, out vboID);
}
GL.BindBuffer(BufferTarget.ArrayBuffer, vboID);
GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(vertexData.Length * VertexSize), vertexData, BufferUsageHint.StreamDraw);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
return vboID;
}
private void GenerateBaseVBO()
{
Vertex[] vertexData = new Vertex[12];
Int32 color = new Color4(0.2f, 0.2f, 0.2f, 0.3f).ToAbgr();
for (ushort i = 0; i < 6; i++)
{
//TODO: use the pair here as a line and shift the border perpendicular to this line in the direction of center, but not towards center itself
// This should be more accurate then the current method
vertexData[i * 2] = new Vertex()
{
Position = polar(HexagonSize, i),
Color = color
};
vertexData[(i * 2) + 1] = new Vertex()
{
Position = polar(HexagonSize, (i + 1) % 6),
Color = color
};
}
baseVboID = VBOHelper.BindVertexBuffer(vertexData, baseVboID);
}
private void GenerateBorder()
{
ushort[] indexData = new ushort[12];
Vertex[] vertexData = new Vertex[12];
for (ushort i = 0, j = 0; i < 6; i++)
{
if (BorderDirection[i] != 0)
{
vertexData[i * 2] = new Vertex()
{
Position = polar(HexagonSize, i),
Color = colorData[i * 2]
};
vertexData[(i * 2) + 1] = new Vertex()
{
Position = polar(HexagonSize, (i + 1) % 6),
Color = colorData[(i * 2) + 1]
};
indexData[j * 2] = (ushort)(i * 2);
indexData[(j * 2) + 1] = (ushort)((i * 2) + 1);
borderIndexLength += 2;
j++;
}
}
borderIboID = VBOHelper.BindIndexBuffer(indexData, borderIboID);
borderVboID = VBOHelper.BindVertexBuffer(vertexData, borderVboID);
borderChanged = false;
}
