public static TextMesh Build(TextNode node, double scale)
{
Font font = node.Font;
List<Vector2> verticies = new List<Vector2>();
List<Vector2> textureCoords = new List<Vector2>();
double x = 0, y = 0;
double maxX = 0, maxY = 0;
double texX = 0, texY = 0;
double texXMax = 0, texYMax = 0;
int xOffset = 0;
Glyph glyph = null;
foreach (TextLine line in node.Lines())
{
// We append them to to verticies.
foreach (char character in line.Text)
{
// Build each character.
glyph = font.GetGlyph(character);
if (glyph == null)
continue; // Skip -> We should render a square instead.
x = node.Position.X + (glyph.Offset.X * scale) + xOffset;
y = node.Position.Y + (glyph.Offset.Y * scale);
maxX = x + (glyph.Size.X * scale);
maxY = y + (glyph.Size.Y * scale);
verticies.Add(new Vector2((float)x, (float)y));
verticies.Add(new Vector2((float)x, (float)maxY));
verticies.Add(new Vector2((float)maxX, (float)y));
verticies.Add(new Vector2((float)maxX, (float)y));
verticies.Add(new Vector2((float)x, (float)maxY));
verticies.Add(new Vector2((float)maxX, (float)maxY));
texX = glyph.Position.X / font.ScaleW;
texY = glyph.Position.Y / font.ScaleH;
texXMax = (glyph.Position.X + glyph.Size.X) / font.ScaleW;
texYMax = (glyph.Position.Y + glyph.Size.Y) / font.ScaleH;
textureCoords.Add(new Vector2((float)texX, (float)texY));
textureCoords.Add(new Vector2((float)texX, (float)texYMax));
textureCoords.Add(new Vector2((float)texXMax, (float)texY));
textureCoords.Add(new Vector2((float)texXMax, (float)texY));
textureCoords.Add(new Vector2((float)texX, (float)texYMax));
textureCoords.Add(new Vector2((float)texXMax, (float)texYMax));
xOffset += (int)Math.Round(glyph.XAdvance * scale);
}
}
return new TextMesh(Utils.VectorConvertor.Vector2ToFloatArray(verticies.ToArray()), verticies.Count, Utils.VectorConvertor.Vector2ToFloatArray(textureCoords.ToArray()));
}
public void Render(string value, double pointScale, Vector2 position, Vector3 color)
{
TextNode node = new TextNode(this, value, position, NormalizedScale * pointScale);
manager.Shader.Bind();
manager.Shader.SetUniform("color", color);
node.PreRender();
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
GL.Disable(EnableCap.DepthTest);
// Bind texture.
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, TextureId);
node.Render();
GL.Enable(EnableCap.DepthTest);
GL.Disable(EnableCap.Blend);
node.PostRender();
manager.Shader.Unbind();
GL.BindTexture(TextureTarget.Texture2D, 0);
}
