Topics

1

DotNet / OpenTK and SFML

« on: May 14, 2016, 11:17:50 pm »

Having a hard time getting sfml to work with opentk. I am creating an sfml window and trying to draw a 3d cube using opengl while using sfml's Text classes to draw text on top. However, on window.resize it bugs the program out. I am changing the model-view and setting the view-port, then it bugs the program where the cube is no longer being drawn. Also when I try to render Text, it is really buggy and flashy.

Am I doing something fundamentally wrong here?

using System;
using SFML.Window;
using SFML.Graphics;
using OpenTK.Graphics.OpenGL;
using OpenTK;

namespace SFML.NET_2015
{
    class Program
    {
        static void Main(string[] args)
        {
            ContextSettings contextSettings = new ContextSettings(24, 0, 0);
            SFML.Graphics.RenderWindow win = new RenderWindow(new VideoMode(640, 400), "SFML.NET", Styles.Default, contextSettings);
            win.SetFramerateLimit(144);
            win.SetMouseCursorVisible(true);

            win.Closed += (o, e) => { win.Close(); };
            win.Resized += (o, e) =>
            {
                GL.Viewport(0, 0, (int)win.Size.X, (int)win.Size.Y);
                Matrix4 matr = OpenTK.Matrix4.CreatePerspectiveFieldOfView((float)Math.PI * 50f / 180f, win.Size.X / (float)win.Size.Y, .1f, 10f);
                GL.LoadMatrix(ref matr);
            };


            Toolkit.Init();
            OpenTK.Graphics.GraphicsMode graphicsMode = new OpenTK.Graphics.GraphicsMode(32, (int)contextSettings.DepthBits, (int)contextSettings.StencilBits, (int)contextSettings.AntialiasingLevel);
            OpenTK.Platform.IWindowInfo windowInfo = OpenTK.Platform.Utilities.CreateWindowsWindowInfo(win.SystemHandle);
            OpenTK.Graphics.GraphicsContext context = new OpenTK.Graphics.GraphicsContext(graphicsMode, windowInfo);
            context.MakeCurrent(windowInfo);
            context.LoadAll();

            GL.EnableClientState(ArrayCap.VertexArray);

            GL.MatrixMode(MatrixMode.Projection);
            Matrix4 mat = OpenTK.Matrix4.CreatePerspectiveFieldOfView((float)Math.PI * 50f / 180f, win.Size.X / (float)win.Size.Y, .1f, 10f);
            GL.LoadMatrix(ref mat);

            GL.MatrixMode(MatrixMode.Modelview);
            GL.Translate(0, 0, -4);

            #region Verts
            float[] verts =
            {
                -1.0f,-1.0f,-1.0f, // triangle 1 : begin
    -1.0f,-1.0f, 1.0f,
    -1.0f, 1.0f, 1.0f, // triangle 1 : end
    1.0f, 1.0f,-1.0f, // triangle 2 : begin
    -1.0f,-1.0f,-1.0f,
    -1.0f, 1.0f,-1.0f, // triangle 2 : end
    1.0f,-1.0f, 1.0f,
    -1.0f,-1.0f,-1.0f,
    1.0f,-1.0f,-1.0f,
    1.0f, 1.0f,-1.0f,
    1.0f,-1.0f,-1.0f,
    -1.0f,-1.0f,-1.0f,
    -1.0f,-1.0f,-1.0f,
    -1.0f, 1.0f, 1.0f,
    -1.0f, 1.0f,-1.0f,
    1.0f,-1.0f, 1.0f,
    -1.0f,-1.0f, 1.0f,
    -1.0f,-1.0f,-1.0f,
    -1.0f, 1.0f, 1.0f,
    -1.0f,-1.0f, 1.0f,
    1.0f,-1.0f, 1.0f,
    1.0f, 1.0f, 1.0f,
    1.0f,-1.0f,-1.0f,
    1.0f, 1.0f,-1.0f,
    1.0f,-1.0f,-1.0f,
    1.0f, 1.0f, 1.0f,
    1.0f,-1.0f, 1.0f,
    1.0f, 1.0f, 1.0f,
    1.0f, 1.0f,-1.0f,
    -1.0f, 1.0f,-1.0f,
    1.0f, 1.0f, 1.0f,
    -1.0f, 1.0f,-1.0f,
    -1.0f, 1.0f, 1.0f,
    1.0f, 1.0f, 1.0f,
    -1.0f, 1.0f, 1.0f,
    1.0f,-1.0f, 1.0f
            };
            #endregion

            int buff = GL.GenBuffer();
            GL.BindBuffer(BufferTarget.ArrayBuffer, buff);
            GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(verts.Length * sizeof(float)), verts, BufferUsageHint.StaticDraw);

            GL.VertexPointer(3, VertexPointerType.Float, 3 * sizeof(float), 0);

            Text t = new Text("Hello Cube", new Font("andyb.ttf"));
            t.Position = new System.Vector2f(200, 200);

            while (win.IsOpen)
            {
                win.DispatchEvents();

                GL.Rotate(.1f, 0, 1, 0);
                GL.DrawArrays(OpenTK.Graphics.OpenGL.PrimitiveType.Triangles, 0, verts.Length);
                GL.End();

                win.PushGLStates();
                win.Draw(t);
                win.PopGLStates();

                win.Display();
            }
        }
    }
}


 

2

Graphics / SFML.Net, Failed to compile Fragement Shader error(#60)

« on: August 26, 2015, 06:01:05 pm »

It runs fine on my computer and some of my friends' computers. But when I try it on others, I get this error.

Failed to compile fragment shader:
Fragment shader failed to compile with the following erros:
ERROR: error(#60) Unknown char: ""
ERROR: error(#273) 1 compilation erros. No code generated

Thnks in advance.