Simple camera type, where FovY angle is given instead of image plane L, R, T, B coordinates.<\/li>\n<\/ul>\nMoreover, I rewrote my refraction code segment from zero over again to simulate glass objects. By doing so, I was able to significantly improve my glass rendering quality (screenshots are provided in between the paragraphs).<\/p>\n
Transformations<\/h4>\n
To implement trasformations, I have added a 4×4 Matrix4 class, so that I could convert the given transformations into their Matrix4 forms, and transform Points and Normals by multiplying them with those 4×4 transformation matrices.<\/p>\n
While parsing the input scene file, I push the Transformations of the Mesh in their given order into a std::vector<Transformation> <\/strong>then create the composite M matrix by multiplying those transformations with each other. At the end, each Vertex of each Triangle of the given Mesh is multiplied by the composite matrix M to be put into their world coordinates (actually, this is not a good idea from the point of view of instancing, we will see why at the end of this post).<\/p>\nMany of the scenes provided for this assignment includes Transformations; so, without implementing this capability, meshes would not get placed in front of the camera and no rendering would be done.<\/p>\n
Note:<\/strong> One must not forget to convert the provided Rotation angle <\/strong>from degrees to radians, to be able to correctly rotate the shape.<\/p>\nDepth of Field<\/h4>\n
A nice capability that can easily be implemented is Depth of Field (DoF),\u00a0<\/strong>which can be used to focus the camera on the object of interest, and blur the rest of the scene according to the distance to the focus point.<\/p>\nBy reading the\u00a0ApertureSize\u00a0<\/strong>and the\u00a0FocusDistance<\/strong> from the input file, I have put the image plane\u00a0FocusDistance far away from the camera, and scaled it by\u00a0(FocusDistance \/ NearDistance)<\/strong>\u00a0times to be able to protect the field of view of the original camera.<\/p>\nNext, I have created a squre aperture, where each edge is in size of\u00a0ApertureSize, and used the same approach I have used to implement MSAA (Multisample Anti-Aliasing) capability, where\u00a0NumSamples<\/strong> many ray are send from the camera into random locations of the same pixel on the image plane, but this time sending the rays from random locations of\u00a0sqrt(NumSamples) x sqrt(NumSamples)\u00a0<\/strong>Aperture Grid<\/strong>, into the center of the same pixel on the image plane.<\/p>\nBy doing so, shapes that are very close to the image plane are put into focus successfully. Below is a GIF file that demonstrates DoF\u00a0<\/strong>capability by putting each of 4 spheres into focus at different renderings (little black line scatterings are caused by Giphy GIF Maker. They are not included in the real rendered images):<\/p>\n