public VAO CreateString(ShaderProgram Program, string Text)
{
Vector3[] vertices = new Vector3[Text.Length * 4];
Vector2[] uvs = new Vector2[Text.Length * 4];
int[] indices = new int[Text.Length * 6];
for (int i = 0; i < Text.Length; i++)
{
// Note: These are fixed width fonts so just use 2x2 quads (-1..1)
vertices[i * 4 + 0] = new Vector3(-1 + i * 2, 1, 0);
vertices[i * 4 + 1] = new Vector3(-1 + i * 2, -1, 0);
vertices[i * 4 + 2] = new Vector3(1 + i * 2, 1, 0);
vertices[i * 4 + 3] = new Vector3(1 + i * 2, -1, 0);
UVPair ch = Character[Text[i] > 256 ? ' ' : Text[i]];
uvs[i * 4 + 0] = new Vector2(ch.Topleft.X, ch.BottomRight.Y);
uvs[i * 4 + 1] = ch.Topleft;
uvs[i * 4 + 2] = ch.BottomRight;
uvs[i * 4 + 3] = new Vector2(ch.BottomRight.X, ch.Topleft.Y);
indices[i * 6 + 0] = i * 4 + 1;
indices[i * 6 + 1] = i * 4 + 0;
indices[i * 6 + 2] = i * 4 + 2;
indices[i * 6 + 3] = i * 4 + 1;
indices[i * 6 + 4] = i * 4 + 2;
indices[i * 6 + 5] = i * 4 + 3;
}
// Create the vertex buffer objects and then create the array object
VBO <Vector3> vertexArray = new VBO <Vector3>(vertices, BufferTarget.ArrayBuffer, BufferUsageHint.StaticRead);
VBO <Vector2> uvArray = new VBO <Vector2>(uvs, BufferTarget.ArrayBuffer, BufferUsageHint.StaticRead);
VBO <int> elementArray = new VBO <int>(indices, BufferTarget.ElementArrayBuffer, BufferUsageHint.StaticRead);
return(new VAO(Program, vertexArray, uvArray, elementArray));
}
/// <summary>
/// Creates a bitmap font object, which is created from a h by v array of bitmap characters.
/// </summary>
/// <param name="FontTexture">A grid of h*v characters ordered by ASCII number.</param>
public BitmapFont(Texture FontTexture, int h, int v)
{
if (FontTexture.Size.Width % h != 0)
{
throw new Exception("FontTexture is not a width that is divisible by h.");
}
if (FontTexture.Size.Height % v != 0)
{
throw new Exception("FontTexture is not a height that is divisible by v.");
}
this.FontTexture = FontTexture;
float delx = (float)FontTexture.Size.Width / h;
float dely = (float)FontTexture.Size.Height / v;
Character = new UVPair[h * v];
for (int x = 0; x < h; x++)
{
for (int y = 0; y < v; y++)
{
Character[x + y * h] = new UVPair(
new Vector2(x * delx / FontTexture.Size.Width, 1 - (y + 1) * dely / FontTexture.Size.Height),
new Vector2((x + 1) * delx / FontTexture.Size.Width, 1 - (y * dely + 1) / FontTexture.Size.Height));
}
}
}
/// <summary>
/// Creates a bitmap font object, which is created from a h by v array of bitmap characters.
/// </summary>
/// <param name="FontTexture">A grid of h*v characters ordered by ASCII number.</param>
public BitmapFont(Texture FontTexture, int h, int v)
{
if (FontTexture.Size.Width % h != 0) throw new Exception("FontTexture is not a width that is divisible by h.");
if (FontTexture.Size.Height % v != 0) throw new Exception("FontTexture is not a height that is divisible by v.");
this.FontTexture = FontTexture;
float delx = (float)FontTexture.Size.Width / h;
float dely = (float)FontTexture.Size.Height / v;
Character = new UVPair[h * v];
for (int x = 0; x < h; x++)
{
for (int y = 0; y < v; y++)
{
Character[x + y * h] = new UVPair(
new Vector2(x * delx / FontTexture.Size.Width, 1 - (y + 1) * delx / FontTexture.Size.Height),
new Vector2((x + 1) * delx / FontTexture.Size.Width, 1 - (y * delx + 1) / FontTexture.Size.Height));
}
}
}