public void CreateBuffers()
{
if (!BufferInitialized)
{
Vao = new VertexArray();
IndexBuffer = new Buffer <int>();
VertexBuffer = new Buffer <T>();
BufferInitialized = true;
Vao.Bind();
Vao.BindElementBuffer(IndexBuffer);
if (TempIndices.Count > 0)
{
IndexBuffer.Init(BufferTarget.ElementArrayBuffer, TempIndices.ToArray());
}
if (TempVertices.Count > 0)
{
VertexBuffer.Init(BufferTarget.ArrayBuffer, TempVertices.ToArray());
}
TempIndices.Clear();
TempVertices.Clear();
}
}
private void OnLoad(object sender, EventArgs e)
{
// maximize window
WindowState = WindowState.Maximized;
// load program
_programOdd = ProgramFactory.Create <GeodesicProgramOdd>();
_programEqual = ProgramFactory.Create <GeodesicProgram>();
_program = _programOdd;
// create icosahedron and set model matrix
_modelMatrix = Matrix4.CreateScale(1);
_icosahedron = new Icosahedron(5);
_icosahedron.UpdateBuffers();
// bind it to an vao
_vao = new VertexArray();
_vao.Bind();
_vao.BindElementBuffer(_icosahedron.IndexBuffer);
_vao.BindAttribute(_program.Position, _icosahedron.VertexBuffer);
// set some reasonable default state
GL.ClearColor(Color4.Black);
GL.Enable(EnableCap.DepthTest);
// backface culling is done in the tesselation control shader
GL.Enable(EnableCap.CullFace);
GL.CullFace(CullFaceMode.Back);
GL.PatchParameter(PatchParameterInt.PatchVertices, 3);
// lighting stuff
_deferredRenderer = new DeferredRenderer();
// enable controls
_variableHandler.Enable(this);
}
private void OnLoad(object sender, EventArgs e)
{
// initialize shader
_program = ProgramFactory.Create<SkyboxProgram>();
// initialize cube shape
_cube = new Cube();
_cube.UpdateBuffers();
// initialize vertex array and attributes
_vao = new VertexArray();
_vao.Bind();
_vao.BindAttribute(_program.InPosition, _cube.VertexBuffer);
_vao.BindElementBuffer(_cube.IndexBuffer);
// create cubemap texture and load all faces
for (var i = 0; i < 6; i++)
{
using (var bitmap = new Bitmap(string.Format("Data/Textures/city{0}.jpg", i)))
{
bitmap.RotateFlip(RotateFlipType.RotateNoneFlipX);
if (_skybox == null) BitmapTexture.CreateCompatible(bitmap, out _skybox, 1);
_skybox.LoadBitmap(bitmap, i);
}
}
// activate shader and bind texture to it
_program.Use();
_program.Texture.BindTexture(TextureUnit.Texture0, _skybox);
// enable seamless filtering to reduce artifacts at the edges of the cube faces
GL.Enable(EnableCap.TextureCubeMapSeamless);
// cull front faces because we are inside the cube
// this is not really necessary but removes some artifacts when the user leaves the cube
// which should be impossible for a real skybox, but in this demonstration it is possible by zooming out
GL.Enable(EnableCap.CullFace);
GL.CullFace(CullFaceMode.Front);
// set a nice clear color
GL.ClearColor(Color.MidnightBlue);
}
public void CreateBuffers()
{
if (!BufferInitialized)
{
Vao = new VertexArray();
IndexBuffer = new Buffer <int>();
VertexBuffer = new Buffer <T>();
BufferInitialized = true;
Vao.Bind();
Vao.BindElementBuffer(IndexBuffer);
}
}
private void OnLoad(object sender, EventArgs e)
{
// initialize and bind framebuffer
_framebuffer = new Framebuffer();
_framebuffer.Bind(FramebufferTarget.Framebuffer);
// initialize a renderbuffer and bind it to the depth attachment
// to support depth testing while rendering to the texture
_depthBuffer = new Renderbuffer();
_depthBuffer.Init(RenderbufferStorage.DepthComponent, FramebufferWidth, FramebufferHeight);
_framebuffer.Attach(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, _depthBuffer);
// initialize texture and bind it to the color attachment
_texture = new Texture2D(SizedInternalFormat.Rgba8, FramebufferWidth, FramebufferHeight, 1);
_framebuffer.Attach(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, _texture);
Framebuffer.Unbind(FramebufferTarget.Framebuffer);
// initialize demonstration geometry
_cube = new ColorCube();
_cube.UpdateBuffers();
_quad = new TexturedQuad();
_quad.UpdateBuffers();
// initialize shaders
_colorProgram = ProgramFactory.Create <SimpleColorProgram>();
_textureProgram = ProgramFactory.Create <SimpleTextureProgram>();
// set up vertex attributes for the cube
_cubeVao = new VertexArray();
_cubeVao.Bind();
_cubeVao.BindAttribute(_colorProgram.InPosition, _cube.VertexBuffer);
_cubeVao.BindAttribute(_colorProgram.InColor, _cube.ColorBuffer);
_cubeVao.BindElementBuffer(_cube.IndexBuffer);
// set up vertex attributes for the quad
_quadVao = new VertexArray();
_quadVao.Bind();
_quadVao.BindAttribute(_textureProgram.InPosition, _quad.VertexBuffer);
_quadVao.BindAttribute(_textureProgram.InTexCoord, _quad.TexCoordBuffer);
// set camera position
Camera.DefaultState.Position = new Vector3(0, 0, 3);
Camera.ResetToDefault();
// enable depth testing
GL.Enable(EnableCap.DepthTest);
}
private void OnLoad(object sender, EventArgs e)
{
// initialize and bind framebuffer
_framebuffer = new Framebuffer();
_framebuffer.Bind(FramebufferTarget.Framebuffer);
// initialize a renderbuffer and bind it to the depth attachment
// to support depth testing while rendering to the texture
_depthBuffer = new Renderbuffer();
_depthBuffer.Init(RenderbufferStorage.DepthComponent, FramebufferWidth, FramebufferHeight);
_framebuffer.Attach(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, _depthBuffer);
// initialize texture and bind it to the color attachment
_texture = new Texture2D(SizedInternalFormat.Rgba8, FramebufferWidth, FramebufferHeight, 1);
_framebuffer.Attach(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, _texture);
Framebuffer.Unbind(FramebufferTarget.Framebuffer);
// initialize demonstration geometry
_cube = new ColorCube();
_cube.UpdateBuffers();
_quad = new TexturedQuad();
_quad.UpdateBuffers();
// initialize shaders
_colorProgram = ProgramFactory.Create<SimpleColorProgram>();
_textureProgram = ProgramFactory.Create<SimpleTextureProgram>();
// set up vertex attributes for the cube
_cubeVao = new VertexArray();
_cubeVao.Bind();
_cubeVao.BindAttribute(_colorProgram.InPosition, _cube.VertexBuffer);
_cubeVao.BindAttribute(_colorProgram.InColor, _cube.ColorBuffer);
_cubeVao.BindElementBuffer(_cube.IndexBuffer);
// set up vertex attributes for the quad
_quadVao = new VertexArray();
_quadVao.Bind();
_quadVao.BindAttribute(_textureProgram.InPosition, _quad.VertexBuffer);
_quadVao.BindAttribute(_textureProgram.InTexCoord, _quad.TexCoordBuffer);
// set camera position
Camera.DefaultState.Position = new Vector3(0,0,3);
Camera.ResetToDefault();
// enable depth testing
GL.Enable(EnableCap.DepthTest);
}
protected override void OnLoad()
{
// initialize shader
_program = ProgramFactory.Create <SkyboxProgram>();
// initialize cube shape
_cube = new Cube();
_cube.UpdateBuffers();
// initialize vertex array and attributes
_vao = new VertexArray();
_vao.Bind();
_vao.BindAttribute(_program.InPosition, _cube.VertexBuffer);
_vao.BindElementBuffer(_cube.IndexBuffer);
// create cubemap texture and load all faces
for (var i = 0; i < 6; i++)
{
using (var bitmap = new Bitmap(string.Format("Data/Textures/city{0}.jpg", i)))
{
bitmap.RotateFlip(RotateFlipType.RotateNoneFlipX);
if (_skybox == null)
{
BitmapTexture.CreateCompatible(bitmap, out _skybox, 1);
}
_skybox.LoadBitmap(bitmap, i);
}
}
// activate shader and bind texture to it
_program.Use();
_program.Texture.BindTexture(TextureUnit.Texture0, _skybox);
// enable seamless filtering to reduce artifacts at the edges of the cube faces
GL.Enable(EnableCap.TextureCubeMapSeamless);
// cull front faces because we are inside the cube
// this is not really necessary but removes some artifacts when the user leaves the cube
// which should be impossible for a real skybox, but in this demonstration it is possible by zooming out
GL.Enable(EnableCap.CullFace);
GL.CullFace(CullFaceMode.Front);
// set a nice clear color
GL.ClearColor(Color.MidnightBlue);
}
