Alguma vez ja se sentiu como se fizesse várias vezes a mesma coisa ou escrevendo código similar repetidas vezes? Por exemplo criando uma nova aplicação web usando asp.net, criando um banco de dados, executando aspnet_regsql.exe, criando acessos, configurando o web.config, criando novo formulário para acesso, codificando a autenticação...  [andalmeida]

Have you ever felt like doing same tasks or writing similar code repetitive times? For example creating a new web application, creating a database, running aspnet_regsql.exe, creating roles, writing web.config, creating a new form for login, coding the login...  [andalmeida]

In this article we will add shadows to our ray tracing. This will give a bit more of a realistic appearance to our final images, and at this point in our implementation if you have patience the results can be amazing...  [andalmeida]

In this new article in our ray-tracing series we will start handling more complex objects. These objects are formed by points, vertices and polygons as we have seen before. Polygons as flat surfaces have one normal vector, and this vector against the light vectors and viewer vector gives us its color. So, working with one normal per polygon face gives a non linear result as we see in fig. 1. ...  [andalmeida]

A new article of our ray-tracing series describes how to apply texture images on triangles. The process is based on R2 and R3 points distance calculations and its proportions, using again the method tAlgebra.GetCoord already known from the last articles...  [andalmeida]

Anti-aliasing is the name for techniques designed to reduce or eliminate the jagged effect of square pixels attempting to approximate curved shapes...  [andalmeida]

Previously we have seen ray tracing and mapping in spheres and triangles with simple illumination model, now we will extend this with reflections and refractions. If you need previous background please check it out on the last articles below...  [andalmeida]

Previously we have seen ray tracing and mapping in spheres. Now I am extending the algorithm to perform ray x triangles intersection calculation. This first approach is very basic, where the face normals are not interpolated and there is no texture mapping which will be shown in next articles...  [andalmeida]

This article demonstrates how to make a simple and very basic Ray Tracing with spheres; it can serve you as a base for implementing more complex algorithms. In a future article I will show how to improve this using image mapping...  [andalmeida]

In my previous article Simple Ray Tracing in C#, we saw how to display spheres using a simple ray tracing algorithm. Now, we will start from the last point and will work with basic illumination models. By definition, we have three types of light: Ambient Diffuse Specular...  [andalmeida]

In my previous articles Mapping Images on Spherical Surfaces Using C# and Simple Ray Tracing in C# we have seen how to map textures onto spheres and as well as a simple ray tracing algorithm. But what combining ray tracing and image mapping?...  [andalmeida]

This article describes how to map a flat 2D image (JPG, BMP, or GIF) on a sphere by using basic algebra. The process is very simple where the x axis of the image will be mapped on sphere longitudes and the y axis of the image will be mapped on sphere latitudes...  [andalmeida]

Plotting User-Defined R2 in R Functions Using C# This article describes very briefly (and on a basic level) how to plot user interactive 3D R2 in R surfaces using C# ASP.NET. The example enables the user to interact with the drawing in 5 aspects as below...  [andalmeida]

In my previous article at CodeProject: "Implementing a Basic Camera Model (Pinhole)", we made a basic camera class that is able to display objects from R3. In order to test the camera, we created a static cube. Now, the idea is to create new objects such as spheres and grids, apply rotations and translations to them, and also apply movement to the camera position between frames, giving us a basic animation. Background...  [andalmeida]

Extending our ray tracing algorithms now we will implement a camera class. The objective is to render the images setting the viewer at any position without restrictions since in our previous models, the viewer must be located at positive z axis, (0,0,z) z>0...  [andalmeida]