写作CSE 3431程序设计、辅导data留学生程序

” 写作CSE 3431程序设计、辅导data留学生程序CSE 3431, Fall 2019 Assignment 3RAY-TRACINGCollaboration: None. If you discuss this assignment with others you should submit their names alongwith the assignment material.For this assignment, you will be building a Ray Tracer using C/C++. The system only needs to handlethe rendering of ellipsoids, with a fixed camera situated at the origin in a right handed coordinatesystem, looking down the negative z-axis. Local illumination, reflections, and shadows will also needto be implemented.The program should take a single argument, which is the name of the file to be parsed. Make sure yourexecutable has the name raytracer.exeand that we can run it as in the following example: raytracer.exe testCase1.txtWe will use a script to Generate the outputs for the set of posted test cases. You will get zeromarks if we cannot run this script because your program does not implement the requiredspecifications.INPUT FILEThe content and syntax of the file is as follows:Content:a. The near plane**, left**, right**, top**, and bottom**b. The resolution of the image nColumns* X nRows*c. The position** and scaling** (non-uniform), color***, Ka***, Kd***, Ks***, Kr*** and thespecular exponent n* of a sphered. The position** and intensity*** of a point light sourcee. The background color***f. The scenes ambient intensity***g. The output file name (you should limit this to 20 characters with no spaces)* int ** float *** float between 0 and 1Syntax:NEAR nLEFT lRIGHT rBOTTOM bT OP tRES x ySPHERE name pos x pos y pos z scl x scl y scl z r g b Ka Kd Ks Kr n // up to 14 additional sphere specificationsLIGHT name pos x pos y pos z Ir Ig Ib // up to 9 additional light specificationsBACK r g bAMBIENT Ir Ig IbOUTPUT nameAll names should be limited to 20 characters, with no spaces. All fields are separated by spaces. Therewill be no angle Brackets in the input file. The ones above are used to indicate the fields.MARKING SCHEME: [2] Coding Style (i.e. well designed clean commented code) [2] x 12 For each of the given test cases. There will be no partial marks given if your program fails to parse the input file or if it does notproduce the correct output. We will use a script to generate the outputs for a set of test cases. You will get zero marksif we cannot run this script because your program does not adhere to given requirements.(Repeated for emphasis)INSTRUCTIONS AND CLARIFICATIONS:- Start working on it early. You will not have time to do it at the last minute.- Submit your assignment on Moodle following the TAs instructions. Your submission shouldinclude ALL of the code necessary to compile and run the program, and should not contain anyadditional functionality besides what is described below. It should not contain any OpenGL APIcalls. You may use OpenGL for displaying the results during your debugging.- You may use the vector and matrix libraries provided on the courses web page.- On the website, you will find two pieces of code. One inverts a 4×4 matrix, and the other writes achar buffer to a ppm image, which is the expected output of this program.- The code that inverts a 4×4 matrix expects two 4×4 matrices to be passed in as arguments. The firstmatrix will be inverted and the result will be stored in the second matrix. Both matrices are roworder, so you have M[row][column].- You may use the STL string and vector classes.- The assignment must be Done from scratch. You can only use code provided by the instructor orthe TA as specified in this document. If in doubt, ASK!- Make sure that your parse routine does not crash based on where the EOF character is.- Given a reasonable resolution (400×400), your program should take no more than five seconds(probably less than that) to run when compiled in release mode.- A sphere at position (0,0,0), with scaling parameters (1,1,1) should be centered at (0,0,0) withradius 1.- If the eye -ray is constructed using the convention described in class, then when intersecting it withan object, the closest object is the one with minimum hit time greater than 1. A hit time between 0and 1 falls between the eye and the near plane, and hence is not a part of the view volume.- When creating rays from the closest hit point on an object, you need to start them at t = 0.0001, toavoid false intersections due to numerical errors. In other words you may not want to considerintersections at time=0.- For the keys and results we use the following convention: Rays from the eye that hit nothing returnthe color of the background, while reflected rays that hit nothing return black (i.e. nothing).- The template code for saving your image to disk uses the ppm image format. If you do not alreadyhave a program that can read images of this type, you can download, GIMP, IfranView from theweb (www.irfanview.com) or Xnviewgb. These are excellent and free programs for viewingimages, and can amongst others read ppm files.- The NEAR value is an absolute value and represents the distance along the negative z-axis.- Your code may need to handle hollow spheres, which are cut open by the near plane.- Your code may need to be able to handle lights inside spheres.- You will be using the Following local illumination model:o PIXEL_COLOR[c] = Ka*Ia[c]*O[c] +for each point light (p) { Kd*Ip[c]*(N dot L)*O[c]+Ks*Ip[c]*(R dot V)n } +Kr*(Color returned from reflection ray)o O is the object coloro [c] means that the variable has three different color component, so the value may varydepending on whether the red, green, or blue pixel color is being calculatedo The other components of this equation are explained in the lecture notes.- You should not spawn More than three reflection rays for each pixel, i.e. stop the recursion after 3bounces.- When summing over all lights, it is possible for the PIXEL_COLOR value to go above 1. In thiscase, the simplest solution is to clamp the value to 1. Do not forget to scale by 255 before creatingthe ppm image using the given save_imageP6() function in ppm.cpp. save_imageP3() isprovided for Debugging reasons because it produces a text file that is human readable. The P6version produces a binary file. Your final program must produce the binary version (P6).- Make sure that your Visual Studio project is designed to create a Console Application orCommand Line Tool.- Make sure you check regularly the forum and the announcements in case the grading or submissioninstructions change.如有需要，请加QQ：99515681 或邮箱：99515681@qq.com

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