private void drawCharacter(Vector2 position, Vector2 size, Vector2 positionUV, Vector2 sizeUV, Vector4 color)
{
shaderPosition.Set(position);
shaderSize.Set(size);
shaderPositionUV.Set(positionUV);
shaderSizeUV.Set(sizeUV);
shaderColor.Set(color);
shader.Apply();
vertexBuffer.Draw();
}