// initialize
public void Init()
{
scene = new SceneGraph();
scene.Init();
// initialize stopwatch
timer = new Stopwatch();
timer.Reset();
timer.Start();
}
// render cubemap
public void RenderCubemap(Matrix4 parentMatrix, SceneGraph scene)
{
Matrix4 finalTransform = localScale * localRotation * localTranslation * parentMatrix;
if (cubemap != null)
{
Vector3 transform = finalTransform.Row3.Xyz;
cubemap.Render(programValues.cubemapshader, transform, scene, this);
}
foreach (ParentMesh p in child_meshes)
{
p.RenderCubemap(finalTransform, scene);
}
}
// render depthmap
public void Render(Shader shader, SceneGraph scene)
{
GL.BindFramebuffer(FramebufferTarget.Framebuffer, framebuffer);
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, id);
GL.Viewport(0, 0, programValues.depthmapres, programValues.depthmapres);
GL.Enable(EnableCap.DepthTest);
GL.Clear(ClearBufferMask.DepthBufferBit);
GL.CullFace(CullFaceMode.Front);
scene.SimpleRender(camera, position, shader);
GL.CullFace(CullFaceMode.Back);
GL.Disable(EnableCap.DepthTest);
GL.Viewport(0, 0, programValues.screenwidth, programValues.screenheight);
}
public void Render(Shader shader, Vector3 transform, SceneGraph scene)
{
GL.BindFramebuffer(FramebufferTarget.Framebuffer, framebuffer);
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.TextureCubeMap, id);
Matrix4 cameraPosition = Matrix4.CreateTranslation(-transform);
GL.Viewport(0, 0, programValues.cubedepthmapres, programValues.cubedepthmapres);
GL.Enable(EnableCap.DepthTest);
GL.CullFace(CullFaceMode.Front);
for (int i = 0; i < 6; ++i)
{
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, TextureTarget.TextureCubeMapPositiveX + i, id, 0);
GL.Clear(ClearBufferMask.DepthBufferBit);
scene.SimpleRender(cameraPosition * cameraRotations[i] * cameraFOV, cameraPosition, programValues.depthcubemapshader);
}
GL.CullFace(CullFaceMode.Back);
GL.Viewport(0, 0, programValues.screenwidth, programValues.screenheight);
}
// render cubemap
public void Render(Shader shader, Vector3 transform, SceneGraph scene, ParentMesh parent)
{
GL.BindFramebuffer(FramebufferTarget.Framebuffer, framebuffer);
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.TextureCubeMap, id);
Matrix4 cameraPosition = Matrix4.CreateTranslation(-transform);
GL.Viewport(0, 0, programValues.cubemapres, programValues.cubemapres);
GL.Enable(EnableCap.DepthTest);
for (int i = 0; i < 6; ++i)
{
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.TextureCubeMapPositiveX + i, id, 0);
GL.Clear(ClearBufferMask.ColorBufferBit);
GL.Clear(ClearBufferMask.DepthBufferBit);
GL.ClearColor(0, 0, 0, 0);
scene.RenderSkyBox(cameraPosition, cameraRotations[i], cameraFOV, programValues.skyboxshader);
scene.SimpleRender(cameraPosition * cameraRotations[i] * cameraFOV, cameraPosition, programValues.cubemapshader, parent);
}
GL.Disable(EnableCap.DepthTest);
GL.Viewport(0, 0, programValues.screenwidth, programValues.screenheight);
}
// initialize
public void Init()
{
sceneGraph = new SceneGraph();
// load a texture
wood = new Texture("../../assets/wood.jpg");
wood1 = new Texture("../../assets/wood1.jpg");
metal = new Texture("../../assets/metal.jpg");
rust = new Texture("../../assets/rust.jpg");
blue = new Texture("../../assets/blue.jpg");
yellow = new Texture("../../assets/yellow.jpg");
// load meshes
Tpot = new Mesh("../../assets/teapot.obj", new Vector3(0, 0, 0), new Vector3(0.5f, 0.5f, 0.5f), new Vector3(0, 0, 0), new List <Mesh>(), wood);
Tpot2 = new Mesh("../../assets/teapot.obj", new Vector3(0, 0, 0), new Vector3(0.5f, 0.5f, 0.5f), new Vector3(5f, 0, 0), new List <Mesh>(), blue);
Tpot3 = new Mesh("../../assets/teapot.obj", new Vector3(0, 0, 0), new Vector3(0.5f, 0.5f, 0.5f), new Vector3(-5f, 6f, 0), new List <Mesh>(), wood1);
Tfloor = new Mesh("../../assets/floor.obj", new Vector3(0, 0, 0), new Vector3(4.0f, 4.0f, 4.0f), new Vector3(0, 0, 0), new List <Mesh>(), rust);
Tfloor1 = new Mesh("../../assets/floor.obj", new Vector3(1, 0, 0), new Vector3(4.0f, 4.0f, 4.0f), new Vector3(0, 0, -25f), new List <Mesh>(), rust);
Tfloor2 = new Mesh("../../assets/floor.obj", new Vector3(0, 1, 0), new Vector3(4.0f, 4.0f, 4.0f), new Vector3(25f, 0, 0), new List <Mesh>(), metal);
Tfloor3 = new Mesh("../../assets/floor.obj", new Vector3(1, 1, 0), new Vector3(4.0f, 4.0f, 4.0f), new Vector3(0, -1f, 0), new List <Mesh>(), yellow);
//Add created meshes to the hierarchy tree
sceneGraph.addPrimaryChild(Tpot);
sceneGraph.addPrimaryChild(Tfloor);
sceneGraph.addPrimaryChild(Tpot2);
//Tpot.addChild(Tpot2);
Tpot.addChild(Tpot3);
Tfloor.addChild(Tfloor1);
Tfloor.addChild(Tfloor2);
Tfloor.addChild(Tfloor3);
// initialize stopwatch
timer = new Stopwatch();
timer.Reset();
timer.Start();
}
// tick for OpenGL rendering code
public void RenderGL()
{
// measure frame duration
float frameDuration = timer.ElapsedMilliseconds;
timer.Reset();
timer.Start();
// prepare matrix for vertex shader
float angle90degrees = PI / 2;
Vector3 cameraPos = new Vector3(0, 50f, 0);
int cameraID = GL.GetUniformLocation(shader.programID, "cameraPos");
GL.UseProgram(shader.programID);
GL.Uniform3(cameraID, cameraPos);
Matrix4 Tcar = Matrix4.CreateScale(0.5f) * Matrix4.CreateRotationY(10f) * Matrix4.CreateTranslation(new Vector3(0, 0, 0)) * Matrix4.CreateFromAxisAngle(new Vector3(0, 1, 0), 9 + 0) * Matrix4.CreateTranslation(new Vector3(0, 0, 0));
Matrix4 Tflag = Matrix4.CreateScale(0.08f) * Tcar * Matrix4.CreateTranslation(new Vector3(0, 2, 0));
Matrix4 toWorld = Tflag;
Matrix4 Tfloor = Matrix4.CreateScale(4.0f) * Matrix4.CreateFromAxisAngle(new Vector3(0, 1, 0), 0);
Matrix4 Tcamera = Matrix4.CreateTranslation(-cameraPos) * Matrix4.CreateFromAxisAngle(new Vector3(1, 0, 0), angle90degrees);
Matrix4 Tview = Matrix4.CreatePerspectiveFieldOfView(1.2f, 1.3f, .1f, 1000);
// defining the model view matrix for the mesh object
flag.modelViewMatrix = Tflag * Tcamera * Tview;
flag.toWorld = toWorld;
car.modelViewMatrix = Tcar * Tcamera * Tview;
car.toWorld = toWorld;
floor.modelViewMatrix = Tfloor * Tcamera * Tview;
floor.toWorld = toWorld;
SceneGraph floor_sg = new SceneGraph(floor);
floor_sg.pos = new Vector3(0, 0, 0);
floor_sg.rotation = a;
floor_sg.scale = new Vector3(4, 2, 2);
// update rotation
a += 0.0005f * frameDuration;
if (a > 2 * PI)
{
a -= 2 * PI;
}
b = a * a;
if (a > 6 * PI)
{
a -= 10 * PI;
}
if (useRenderTarget)
{
// enable render target
target.Bind();
// render scene via Scenegraph
floor_sg.Render(Tcamera * Tview);
// render scene to render target
/*
* flag.Render(shader, Tflag * Tcamera * Tview, toWorld, dark);
* car.Render( shader, Tcar*Tcamera*Tview, toWorld, silver);
* floor.Render( shader, Tfloor * Tcamera * Tview, toWorld, wood ); */
// render quad
target.Unbind();
quad.Render(postproc, target.GetTextureID());
}
else
{
// render scene via SceneGraph
floor_sg.Render(Tcamera);
// render scene directly to the
/*
* flag.Render(shader, Tflag * Tcamera * Tview, toWorld, dark);
* car.Render(shader, Tcar * Tcamera * Tview, toWorld, silver);
* floor.Render(shader, Tfloor * Tcamera * Tview, toWorld, wood); */
}
}
// initialize
public void Init()
{
programValues.screenwidth = screen.width;
programValues.screenheight = screen.height;
timer = new Stopwatch();
timer.Reset();
timer.Start();
// create shaders
shader = new Shader("../../shaders/vs.glsl", "../../shaders/fs.glsl");
postproc = new Shader("../../shaders/vs_post.glsl", "../../shaders/fs_post.glsl");
rendershader = new Shader("../../shaders/vs_render.glsl", "../../shaders/fs_render.glsl");
//rendershader = new Shader( "../../shaders/vs_render.glsl", "../../shaders/fs_renderDepthmap.glsl" );
programValues.skyboxshader = new Shader("../../shaders/vs_skybox.glsl", "../../shaders/fs_skybox.glsl");
programValues.cubemapshader = new Shader("../../shaders/vs_cubemap.glsl", "../../shaders/fs_cubemap.glsl");
programValues.depthmapshader = new Shader("../../shaders/vs_depthmap.glsl", "../../shaders/fs_depthmap.glsl");
programValues.depthcubemapshader = new Shader("../../shaders/vs_depthmap.glsl", "../../shaders/fs_depthcubemap.glsl");
cameraPosition = new Matrix4();
cameraRotation = Matrix4.CreateRotationX((float)(0.5 * Math.PI));
cameraFOV = Matrix4.CreatePerspectiveFieldOfView((float)(Math.PI * 0.5), screen.width / screen.height, 0.01f, 1000);
//create scene
scene = new SceneGraph();
// create standard framebuffer
framebuffer = GL.GenFramebuffer();
GL.BindFramebuffer(FramebufferTarget.Framebuffer, framebuffer);
// create standard renderbuffer
renderbuffer = GL.GenRenderbuffer();
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, renderbuffer);
GL.RenderbufferStorage(RenderbufferTarget.Renderbuffer, RenderbufferStorage.DepthComponent, screen.width, screen.height);
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, RenderbufferTarget.Renderbuffer, renderbuffer);
// create standard texture
colorbuffer = new int[2];
GL.GenTextures(2, colorbuffer);
for (int i = 0; i < 2; ++i)
{
GL.BindTexture(TextureTarget.Texture2D, colorbuffer[i]);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba32f, screen.width, screen.height, 0, PixelFormat.Rgba, PixelType.UnsignedByte, IntPtr.Zero);
GL.TexParameterI(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, new int[] { (int)All.Nearest });
GL.TexParameterI(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, new int[] { (int)All.Nearest });
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0 + i, TextureTarget.Texture2D, colorbuffer[i], 0);
}
DrawBuffersEnum[] attachments = new DrawBuffersEnum[2] {
DrawBuffersEnum.ColorAttachment0, DrawBuffersEnum.ColorAttachment1
};
GL.DrawBuffers(2, attachments);
if (GL.CheckFramebufferStatus(FramebufferTarget.Framebuffer) != FramebufferErrorCode.FramebufferComplete)
{
Console.WriteLine("Framebuffer not set up correctly");
}
hdrFramebuffer = new int[2];
hdrColorbuffer = new int[2];
// create post processing
GL.GenFramebuffers(2, hdrFramebuffer);
GL.GenTextures(2, hdrColorbuffer);
for (int i = 0; i < 2; ++i)
{
GL.BindFramebuffer(FramebufferTarget.Framebuffer, hdrFramebuffer[i]);
GL.BindTexture(TextureTarget.Texture2D, hdrColorbuffer[i]);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba32f, programValues.screenwidth, programValues.screenheight, 0, PixelFormat.Rgba, PixelType.Float, IntPtr.Zero);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)TextureWrapMode.ClampToEdge);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)TextureWrapMode.ClampToEdge);
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.Texture2D, hdrColorbuffer[i], 0);
}
if (GL.CheckFramebufferStatus(FramebufferTarget.Framebuffer) != FramebufferErrorCode.FramebufferComplete)
{
Console.WriteLine("HDRFramebuffer not set up correctly");
}
// create draw quad
float[] vertices = new float[] {
-1f, -1f,
1f, -1f,
-1f, 1f,
-1f, 1f,
1f, -1f,
1f, 1
};
float[] texCoords = new float[]
{
0, 0,
1f, 0,
0, 1f,
0, 1f,
1f, 0,
1f, 1f
};
//create buffers
quadVertexbuffer = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, quadVertexbuffer);
GL.BufferData(BufferTarget.ArrayBuffer, vertices.Length * sizeof(float), vertices, BufferUsageHint.StaticDraw);
GL.VertexAttribPointer(0, 2, VertexAttribPointerType.Float, false, 0, 0);
quadTexbuffer = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, quadTexbuffer);
GL.BufferData(BufferTarget.ArrayBuffer, texCoords.Length * sizeof(float), texCoords, BufferUsageHint.StaticDraw);
GL.VertexAttribPointer(1, 2, VertexAttribPointerType.Float, false, 0, 0);
}
