public override void OnRenderFrame(float deltaTime)
{
Gl.PolygonMode(MaterialFace.FrontAndBack, PolygonMode.Fill);
// bind the font program as well as the font texture
Gl.UseProgram(fontProgram.ProgramID);
Gl.BindTexture(font.FontTexture);
// draw the tutorial information, which is static
information.Draw();
// BUG The VBO not disposing error seems to come from in here.
if (ShowInfo)
{
FontVAO gameOverlayInfo = font.CreateString(fontProgram, GameInfo,
BMFont.Justification.Right);
gameOverlayInfo.Position = new Vector2(Width / 2 - 10, Height / 2 - font.Height - 10);
gameOverlayInfo.Draw();
gameOverlayInfo.Dispose();
}
}
private static void OnRenderFrame()
{
watch.Stop();
float deltaTime = (float)watch.ElapsedTicks / System.Diagnostics.Stopwatch.Frequency;
watch.Restart();
// update our camera by moving it up to 5 units per second in each direction
if (down)
{
camera.MoveRelative(Vector3.UnitZ * deltaTime * 5);
}
if (up)
{
camera.MoveRelative(-Vector3.UnitZ * deltaTime * 5);
}
if (left)
{
camera.MoveRelative(-Vector3.UnitX * deltaTime * 5);
}
if (right)
{
camera.MoveRelative(Vector3.UnitX * deltaTime * 5);
}
if (space)
{
camera.MoveRelative(Vector3.UnitY * deltaTime * 3);
}
// set up the viewport and clear the previous depth and color buffers
Gl.Viewport(0, 0, width, height);
Gl.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
// make sure the shader program and texture are being used
Gl.UseProgram(program);
Gl.ActiveTexture(TextureUnit.Texture1);
Gl.BindTexture(brickNormals);
Gl.ActiveTexture(TextureUnit.Texture0);
Gl.BindTexture(brickDiffuse);
// apply our camera view matrix to the shader view matrix (this can be used for all objects in the scene)
program["view_matrix"].SetValue(camera.ViewMatrix);
// set up the model matrix and draw the cube
program["model_matrix"].SetValue(Matrix4.Identity);
program["enable_lighting"].SetValue(lighting);
program["enable_mapping"].SetValue(normalMapping);
Gl.BindBufferToShaderAttribute(cube, program, "vertexPosition");
Gl.BindBufferToShaderAttribute(cubeNormals, program, "vertexNormal");
Gl.BindBufferToShaderAttribute(cubeTangents, program, "vertexTangent");
Gl.BindBufferToShaderAttribute(cubeUV, program, "vertexUV");
Gl.BindBuffer(cubeTriangles);
Gl.DrawElements(BeginMode.Triangles, cubeTriangles.Count, DrawElementsType.UnsignedInt, IntPtr.Zero);
// bind the font program as well as the font texture
Gl.UseProgram(fontProgram.ProgramID);
Gl.BindTexture(font.FontTexture);
// draw the tutorial information, which is static
information.Draw();
Glut.glutSwapBuffers();
}