CS 4204 Computer Graphics
|
|
- Rafe McKenzie
- 6 years ago
- Views:
Transcription
1 CS 4204 Computer Graphics Introduction to Ray Tracing Yong Cao Virginia Tech Reference: Ed Angle, Interactive Computer Graphics, University of New Mexico, class notes
2 Raytracing (Picture from Povray.org)
3 Raytracing (Picture from Povray.org)
4 Raytracing (Picture from Povray.org)
5 Raytracing (Picture from Povray.org)
6 Raytracing (Picture from Povray.org)
7 Raytracing (Picture from Povray.org)
8 The Basic Idea Simulate light rays from light source to eye Eye Light Surface
9 Forward Ray-Tracing Trace rays from light Lots of work for little return Light Image Plane Light Rays Eye Object
10 Scene S A shiny, transparent S B,S D S C diffuse, opaque shiny, opaque S C Light S D Eye S A Image Plane S B
11 Three sources of light The light that point P A emits to the eye comes from: light sources other objects (reflection) other objects (refraction) Eye S C Light S D P A S A shiny, transparent S B,S D diffuse,opaque S A S C shiny, opaque S B
12 Directly from light source Local illumination model: I = I a +I diff +I spec S A S B,S D S C shiny, transparent diffuse,opaque shiny, opaque Light Eye S C S D P A S A S B
13 Reflection What is the color that is reflected to P A? The color of P C. What is the color of P C? S A S B,S D S C shiny, transparent diffuse,opaque shiny, opaque Light Eye S C Pc S D n P A S A S B
14 Reflection What is the light that is reflected to P A? The color of P C. as viewed by P A What is the color of P C reflected towards P A? Just like P A : raytrace P C i.e compute the Eye three contributions from 1. Light sources 2. Reflection 3. refraction S A S B,S D S C S C S A shiny, transparent diffuse,opaque shiny, opaque Light S D P A S B
15 Refraction Transparent materials How do you compute the refracted contribution? You raytrace the refracted ray. 1. Lights 2. Reflection 3. Refraction Eye S A S B,S D S C S C S A shiny, transparent diffuse,opaque shiny, opaque Light S D P A S B
16 What are we missing? Diffuse objects do not receive light from other objects.
17 Three sources of light together The color that the pixel is assigned comes from: light sources other objects (reflection) other objects (refraction) It is more convenient to trace the rays from the eye to the scene (backwards) S A S B,S D S C S C shiny, transparent diffuse,opaque shiny, opaque Light S D Eye P A S A S B
18 Backwards Raytracing Algoritm For each pixel construct a ray: eye pixel raytrace( ray ) P = closest intersection color_local = ShadowRay(light1, P)+ + ShadowRay(lightN, P) color_reflect = raytrace(reflected_ray ) color_refract = raytrace(refracted_ray ) color = color_local + k re *color_reflect + k ra *color_refract return( color )
19 How many levels of recursion do we use? The more the better. Infinite reflections at the limit.
20 Stages of raytracing Setting the camera and the image plane Computing a ray from the eye to every pixel and trace it in the scene Object-ray intersections Shadow, reflected and refracted ray at each intersection
21 Setting up the camera
22 Image parameters Width 2W, Height 2H Number of pixels ncols x nrows Camera coordinate system (eye, u,v,n) Image plane at -N
23 Pixel coordinates in camera coordinate system Pixel P(r,c) has coordinates in camera space:
24 Ray through pixel Pixel location Ray through pixel:
25 Triangle Intersection Want to know: at what point (p) does ray intersect triangle? Compute lighting, reflected rays, shadowing from that point p r o r d <?,?,?> (t =???)
26 Triangle Intersection Step 1 : Intersect with plane ( Ax + By + Cz + D = 0 ) Plane normal n = <A, B, C> p r d r o p = -(n. r o + D) / (n. r d )
27 Triangle Intersection Step 2 : Check against triangle edges n V 1 V 0 V 1 E 0 p E i = V i V x i+1 n (plane A, B, C) d i = -A. N (plane D) V 0 V 2 Plug p into (p. E i + d i ) for each edge if signs are all positive or negative, point is inside triangle!
28 Triangle Normals Could use plane normals (flat shading) Better to interpolate from vertices n V1 V 1 Find areas n p n V0 a c b V 0 n V2 V 2 n = an V0 + bn V1 + cn V2 area(v 0 V 1 V 2 )
29 Ray-object intersections Unit sphere at origin - ray intersection: That s a quadratic equation
30 Solving a quadratic equation
31 First intersection? Intersections t= Ray(t) t=0
32 First intersection? t1 < t2 Intersections t= t2 Ray(t) t1 t=0
33 Transformed primitives? Where does S+ct hit the transformed sphere G?
34 Linear transformation
35 Linear transformation
36 Final Intersection Inverse transformed ray Drop 1 and O to get S +c t For each object Inverse transform ray getting S +c t Find intersection t h Use t h in the untransformed ray S+ct to find the intersection
37 Shadow ray For each light intersect shadow ray with all objects. If no intersection is found apply local illumination at intersection Lights If in shadow no contribution
38 Reflected ray Raytrace the reflected ray Ray rf (t) N a Ray(t) a P
39 Refracted ray Raytrace the refracted ray Snell s law N
40 Add all together color(r,c) = color_shadow_ray + Kf*color_rf + Kr*color_rfa
41 Raytracing for each pixel on screen determine ray from eye through pixel find closest intersection of ray with an object cast off reflected and refracted ray, recursively calculate pixel colour, draw pixel end
42 Acceleration 1280x1024 image with 10 rays/pixel 1000 objects (triangle, CSG, NURBS) 3 levels recursion intersection tests tests/second -> 109 days! Must use an acceleration method!
43 Bounding volumes Use simple shape for quick test, keep a hierarchy
44 Space Subdivision Break your space into pieces Search the structure linearly
45 Parallel Processing You can always throw more processors at it.
46 Summary: Raytracing Recursive algorithm Function Main for each pixel (c,r) on screen determine ray r c,r from eye through pixel color(c,r) = raytrace(r c,r ) end for end function raytrace(r) find closest intersection P of ray with objects clocal = Sum(shadowRays(P,Lighti)) c re = raytrace(r re ) c ra = raytrace(r ra ) return c = clocal+k re *c re +k ra *c ra end
47 Advanced concepts Participating media Transculency Sub-surface scattering (e.g. Human skin) Photon mapping
48 Raytracing summary View dependent Computationally expensive Good for refraction and reflection effects
COMPLETION OF Z-buffer Graphics Pipeline
Z-buffer algorithm for each polygon in model project vertices of polygon onto viewing plane for each pixel inside the projected polygon calculate pixel colour calculate pixel z-value compare pixel z-value
More informationRecursion and Data Structures in Computer Graphics. Ray Tracing
Recursion and Data Structures in Computer Graphics Ray Tracing 1 Forward Ray Tracing imagine that you take a picture of a room using a camera exactly what is the camera sensing? light reflected from the
More informationRendering: Reality. Eye acts as pinhole camera. Photons from light hit objects
Basic Ray Tracing Rendering: Reality Eye acts as pinhole camera Photons from light hit objects Rendering: Reality Eye acts as pinhole camera Photons from light hit objects Rendering: Reality Eye acts as
More informationLighting. To do. Course Outline. This Lecture. Continue to work on ray programming assignment Start thinking about final project
To do Continue to work on ray programming assignment Start thinking about final project Lighting Course Outline 3D Graphics Pipeline Modeling (Creating 3D Geometry) Mesh; modeling; sampling; Interaction
More informationRay Tracing. CSCI 420 Computer Graphics Lecture 15. Ray Casting Shadow Rays Reflection and Transmission [Ch ]
CSCI 420 Computer Graphics Lecture 15 Ray Tracing Ray Casting Shadow Rays Reflection and Transmission [Ch. 13.2-13.3] Jernej Barbic University of Southern California 1 Local Illumination Object illuminations
More informationComputer Graphics and Image Processing Ray Tracing I
Computer Graphics and Image Processing Ray Tracing I Part 1 Lecture 9 1 Today s Outline Introduction to Ray Tracing Ray Casting Intersecting Rays with Primitives Intersecting Rays with Transformed Primitives
More informationCOMP371 COMPUTER GRAPHICS
COMP371 COMPUTER GRAPHICS SESSION 15 RAY TRACING 1 Announcements Programming Assignment 3 out today - overview @ end of the class Ray Tracing 2 Lecture Overview Review of last class Ray Tracing 3 Local
More informationLecture 18: Primer on Ray Tracing Techniques
Lecture 18: Primer on Ray Tracing Techniques 6.172: Performance Engineering of Software Systems Joshua Slocum November 16, 2010 A Little Background Image rendering technique Simulate rays of light - ray
More informationRecollection. Models Pixels. Model transformation Viewport transformation Clipping Rasterization Texturing + Lights & shadows
Recollection Models Pixels Model transformation Viewport transformation Clipping Rasterization Texturing + Lights & shadows Can be computed in different stages 1 So far we came to Geometry model 3 Surface
More informationRecursive Ray Tracing. Ron Goldman Department of Computer Science Rice University
Recursive Ray Tracing Ron Goldman Department of Computer Science Rice University Setup 1. Eye Point 2. Viewing Screen 3. Light Sources 4. Objects in Scene a. Reflectivity b. Transparency c. Index of Refraction
More informationRay tracing. Computer Graphics COMP 770 (236) Spring Instructor: Brandon Lloyd 3/19/07 1
Ray tracing Computer Graphics COMP 770 (236) Spring 2007 Instructor: Brandon Lloyd 3/19/07 1 From last time Hidden surface removal Painter s algorithm Clipping algorithms Area subdivision BSP trees Z-Buffer
More informationCPSC GLOBAL ILLUMINATION
CPSC 314 21 GLOBAL ILLUMINATION Textbook: 20 UGRAD.CS.UBC.CA/~CS314 Mikhail Bessmeltsev ILLUMINATION MODELS/ALGORITHMS Local illumination - Fast Ignore real physics, approximate the look Interaction of
More informationSupplement to Lecture 16
Supplement to Lecture 16 Global Illumination: View Dependent CS 354 Computer Graphics http://www.cs.utexas.edu/~bajaj/ Notes and figures from Ed Angel: Interactive Computer Graphics, 6 th Ed., 2012 Addison
More informationCS354 Computer Graphics Ray Tracing. Qixing Huang Januray 24th 2017
CS354 Computer Graphics Ray Tracing Qixing Huang Januray 24th 2017 Graphics Pipeline Elements of rendering Object Light Material Camera Geometric optics Modern theories of light treat it as both a wave
More informationConsider a partially transparent object that is illuminated with two lights, one visible from each side of the object. Start with a ray from the eye
Ray Tracing What was the rendering equation? Motivate & list the terms. Relate the rendering equation to forward ray tracing. Why is forward ray tracing not good for image formation? What is the difference
More informationRay-Tracing. Misha Kazhdan
Ray-Tracing Misha Kazhdan Ray-Tracing In graphics, we often represent the surface of a 3D shape by a set of triangles. Goal: Ray-Tracing Take a collection of triangles representing a 3D scene and render
More informationPhotorealism: Ray Tracing
Photorealism: Ray Tracing Reading Assignment: Chapter 13 Local vs. Global Illumination Local Illumination depends on local object and light sources only Global Illumination at a point can depend on any
More informationCS 325 Computer Graphics
CS 325 Computer Graphics 04 / 02 / 2012 Instructor: Michael Eckmann Today s Topics Questions? Comments? Illumination modelling Ambient, Diffuse, Specular Reflection Surface Rendering / Shading models Flat
More informationRaytracing CS148 AS3. Due :59pm PDT
Raytracing CS148 AS3 Due 2010-07-25 11:59pm PDT We start our exploration of Rendering - the process of converting a high-level object-based description of scene into an image. We will do this by building
More informationReview for Ray-tracing Algorithm and Hardware
Review for Ray-tracing Algorithm and Hardware Reporter: 邱敬捷博士候選人 Lan-Da Van ( 范倫達 ), Ph. D. Department of Computer Science National Chiao Tung University Taiwan, R.O.C. Summer, 2017 1 2017/7/26 Outline
More informationIntro to Ray-Tracing & Ray-Surface Acceleration
Lecture 12 & 13: Intro to Ray-Tracing & Ray-Surface Acceleration Computer Graphics and Imaging UC Berkeley Course Roadmap Rasterization Pipeline Core Concepts Sampling Antialiasing Transforms Geometric
More information1999, Denis Zorin. Ray tracing
Ray tracing Ray tracing shadow rays normal reflected ray pixel ray camera normal Ray casting/ray tracing Iterate over pixels, not objects. Effects that are difficult with Z-buffer, are easy with ray tracing:
More informationTopic 12: Texture Mapping. Motivation Sources of texture Texture coordinates Bump mapping, mip-mapping & env mapping
Topic 12: Texture Mapping Motivation Sources of texture Texture coordinates Bump mapping, mip-mapping & env mapping Texture sources: Photographs Texture sources: Procedural Texture sources: Solid textures
More informationRendering Part I (Basics & Ray tracing) Lecture 25 December 1, 2015
Rendering Part I (Basics & Ray tracing) Lecture 25 December 1, 2015 What is rendering? Generating an image from a 3D scene model Ingredients Representation of 3D geometry Specification for camera & lights
More informationTopic 11: Texture Mapping 11/13/2017. Texture sources: Solid textures. Texture sources: Synthesized
Topic 11: Texture Mapping Motivation Sources of texture Texture coordinates Bump mapping, mip mapping & env mapping Texture sources: Photographs Texture sources: Procedural Texture sources: Solid textures
More informationRay tracing. EECS 487 March 19,
Ray tracing EECS 487 March 19, 2007 http://radsite.lbl.gov/radiance/book/ 1 Conventional pipeline (rasterization) For each triangle Compute lighting at vertices For each pixel within triangle Compute interpolated
More informationLighting and Shading
Lighting and Shading Today: Local Illumination Solving the rendering equation is too expensive First do local illumination Then hack in reflections and shadows Local Shading: Notation light intensity in,
More informationShading, Advanced Rendering. Week 7, Wed Feb 28
University of British Columbia CPSC 314 Computer Graphics Jan-Apr 2007 Tamara Munzner Shading, Advanced Rendering Week 7, Wed Feb 28 http://www.ugrad.cs.ubc.ca/~cs314/vjan2007 Reading for Today and Tomorrow
More informationTopic 11: Texture Mapping 10/21/2015. Photographs. Solid textures. Procedural
Topic 11: Texture Mapping Motivation Sources of texture Texture coordinates Bump mapping, mip mapping & env mapping Topic 11: Photographs Texture Mapping Motivation Sources of texture Texture coordinates
More informationLecture 11. More Ray Casting/Tracing
Lecture 11 More Ray Casting/Tracing Basic Algorithm For each pixel { } Shoot a ray from camera to pixel for all objects in scene Compute intersection with ray Find object with closest intersection Display
More informationRay tracing. Methods of Programming DV2. Introduction to ray tracing and XML. Forward ray tracing. The image plane. Backward ray tracing
Methods of Programming DV2 Introduction to ray tracing and XML Ray tracing Suppose we have a description of a 3-dimensional world consisting of various objects spheres, triangles (flat), planes (flat,
More informationComputer Graphics. Si Lu. Fall uter_graphics.htm 11/22/2017
Computer Graphics Si Lu Fall 2017 http://web.cecs.pdx.edu/~lusi/cs447/cs447_547_comp uter_graphics.htm 11/22/2017 Last time o Splines 2 Today o Raytracing o Final Exam: 14:00-15:30, Novermber 29, 2017
More informationRay Tracing Basics I. Computer Graphics as Virtual Photography. camera (captures light) real scene. photo. Photographic print. Photography: processing
Ray Tracing Basics I Computer Graphics as Virtual Photography Photography: real scene camera (captures light) photo processing Photographic print processing Computer Graphics: 3D models camera model (focuses
More informationRay Tracing. Kjetil Babington
Ray Tracing Kjetil Babington 21.10.2011 1 Introduction What is Ray Tracing? Act of tracing a ray through some scene Not necessarily for rendering Rendering with Ray Tracing Ray Tracing is a global illumination
More informationLecture 17: Recursive Ray Tracing. Where is the way where light dwelleth? Job 38:19
Lecture 17: Recursive Ray Tracing Where is the way where light dwelleth? Job 38:19 1. Raster Graphics Typical graphics terminals today are raster displays. A raster display renders a picture scan line
More informationCOMPUTER GRAPHICS AND INTERACTION
DH2323 DGI17 COMPUTER GRAPHICS AND INTERACTION INTRODUCTION TO RAYTRACING Christopher Peters CST, KTH Royal Institute of Technology, Sweden chpeters@kth.se http://kth.academia.edu/christopheredwardpeters
More informationRaytracing. COSC 4328/5327 Scott A. King
Raytracing COSC 4328/5327 Scott A. King Basic Ray Casting Method pixels in screen Shoot ray p from the eye through the pixel. Find closest ray-object intersection. Get color at intersection Basic Ray Casting
More informationMovie: For The Birds. Announcements. Ray Tracing 1. Programming 2 Recap. Programming 3 Info Test data for part 1 (Lines) is available
Now Playing: Movie: For The Birds Pixar, 2000 Liar Built To Spill from You In Reverse Released April 11, 2006 Ray Tracing 1 Rick Skarbez, Instructor COMP 575 November 1, 2007 Announcements Programming
More informationComputer Graphics. Lecture 13. Global Illumination 1: Ray Tracing and Radiosity. Taku Komura
Computer Graphics Lecture 13 Global Illumination 1: Ray Tracing and Radiosity Taku Komura 1 Rendering techniques Can be classified as Local Illumination techniques Global Illumination techniques Local
More informationSUMMARY. CS380: Introduction to Computer Graphics Ray tracing Chapter 20. Min H. Kim KAIST School of Computing 18/05/29. Modeling
CS380: Introduction to Computer Graphics Ray tracing Chapter 20 Min H. Kim KAIST School of Computing Modeling SUMMARY 2 1 Types of coordinate function Explicit function: Line example: Implicit function:
More informationCS 428: Fall Introduction to. Raytracing. Andrew Nealen, Rutgers, /18/2009 1
CS 428: Fall 2009 Introduction to Computer Graphics Raytracing 11/18/2009 1 Forward ray tracing From the light sources Simulate light transport one ray at a time Rays start from lights + bounce around
More informationGlobal Rendering. Ingela Nyström 1. Effects needed for realism. The Rendering Equation. Local vs global rendering. Light-material interaction
Effects needed for realism Global Rendering Computer Graphics 1, Fall 2005 Lecture 7 4th ed.: Ch 6.10, 12.1-12.5 Shadows Reflections (Mirrors) Transparency Interreflections Detail (Textures etc.) Complex
More informationSo far, we have considered only local models of illumination; they only account for incident light coming directly from the light sources.
11 11.1 Basics So far, we have considered only local models of illumination; they only account for incident light coming directly from the light sources. Global models include incident light that arrives
More informationCS Computer Graphics: Introduction to Ray Tracing
CS 543 - Computer Graphics: Introduction to Ray Tracing by Robert W. Lindeman gogo@wpi.edu (with help from Peter Lohrmann ;-) View Volume View volume similar to gluperspective Angle Aspect Near? Far? But
More informationCS Computer Graphics: Introduction to Ray Tracing
CS 543 - Computer Graphics: Introduction to Ray Tracing by Robert W. Lindeman gogo@wpi.edu (with help from Peter Lohrmann ;-) View Volume View volume similar to gluperspective Angle Aspect Near? Far? But
More informationRay Casting. Outline. Similar to glulookat derivation. Foundations of Computer Graphics
Foundations of omputer Graphics Online Lecture 10: Ray Tracing 2 Nuts and olts amera Ray asting Outline amera Ray asting (choose ray directions) Ravi Ramamoorthi Outline in ode Image Raytrace (amera cam,
More informationRay Tracer I: Ray Casting Due date: 12:00pm December 3, 2001
Computer graphics Assignment 5 1 Overview Ray Tracer I: Ray Casting Due date: 12:00pm December 3, 2001 In this assignment you will implement the camera and several primitive objects for a ray tracer. We
More informationCOMP 175 COMPUTER GRAPHICS. Ray Casting. COMP 175: Computer Graphics April 26, Erik Anderson 09 Ray Casting
Ray Casting COMP 175: Computer Graphics April 26, 2018 1/41 Admin } Assignment 4 posted } Picking new partners today for rest of the assignments } Demo in the works } Mac demo may require a new dylib I
More informationIntroduction Ray tracing basics Advanced topics (shading) Advanced topics (geometry) Graphics 2010/2011, 4th quarter. Lecture 11: Ray tracing
Lecture 11 Ray tracing Introduction Projection vs. ray tracing Projection Ray tracing Rendering Projection vs. ray tracing Projection Ray tracing Basic methods for image generation Major areas of computer
More informationRay Tracing Part 1. CSC418/2504 Introduction to Computer Graphics. TA: Muhammed Anwar & Kevin Gibson
Ray Tracing Part 1 CSC418/2504 Introduction to Computer Graphics TA: Muhammed Anwar & Kevin Gibson Email: manwar@cs.toronto.edu Overview Introduction / Motivation Rasterization vs Ray Tracing Basic Pseudocode
More informationProblem Set 4 Part 1 CMSC 427 Distributed: Thursday, November 1, 2007 Due: Tuesday, November 20, 2007
Problem Set 4 Part 1 CMSC 427 Distributed: Thursday, November 1, 2007 Due: Tuesday, November 20, 2007 Programming For this assignment you will write a simple ray tracer. It will be written in C++ without
More informationRay Tracing. Foley & Van Dam, Chapters 15 and 16
Ray Tracing Foley & Van Dam, Chapters 15 and 16 Ray Tracing Visible Surface Ray Tracing (Ray Casting) Examples Efficiency Issues Computing Boolean Set Operations Recursive Ray Tracing Determine visibility
More informationRay Tracing Foley & Van Dam, Chapters 15 and 16
Foley & Van Dam, Chapters 15 and 16 (Ray Casting) Examples Efficiency Issues Computing Boolean Set Operations Recursive Determine visibility of a surface by tracing rays of light from the viewer s eye
More informationSung-Eui Yoon ( 윤성의 )
CS380: Computer Graphics Ray Tracing Sung-Eui Yoon ( 윤성의 ) Course URL: http://sglab.kaist.ac.kr/~sungeui/cg/ Class Objectives Understand overall algorithm of recursive ray tracing Ray generations Intersection
More informationGraphics 2009/2010, period 1. Lecture 8: ray tracing
Graphics 2009/2010, period 1 Lecture 8 Ray tracing Original plan Finish the basic stuff (book ch 1-9) today: We will not look into signal processing (chapter 4) We will look at triangle rasterization (cf.
More informationCS 563 Advanced Topics in Computer Graphics Lecture 2: Bare-Bones Raytracer. by Emmanuel Agu
CS 563 Advanced Topics in Computer Graphics Lecture 2: Bare-Bones Raytracer by Emmanuel Agu Ray Casting (Appel, 1968) direct illumination Recursive ray tracing (Whitted, 1980) Pseudocode for Ray Tracer
More informationCS580: Ray Tracing. Sung-Eui Yoon ( 윤성의 ) Course URL:
CS580: Ray Tracing Sung-Eui Yoon ( 윤성의 ) Course URL: http://sglab.kaist.ac.kr/~sungeui/gcg/ Recursive Ray Casting Gained popularity in when Turner Whitted (1980) recognized that recursive ray casting could
More informationRay casting. Ray casting/ray tracing
Ray casting Ray casting/ray tracing Iterate over pixels, not objects Effects that are difficult with Z-buffer, are easy with ray tracing: shadows, reflections, transparency, procedural textures and objects
More informationComputer Graphics. Ray Tracing. Based on slides by Dianna Xu, Bryn Mawr College
Computer Graphics Ray Tracing Based on slides by Dianna Xu, Bryn Mawr College Ray Tracing Example Created by Anto Matkovic Ray Tracing Example Ray Tracing Example Ray Tracing Most light rays do not reach
More informationThe Traditional Graphics Pipeline
Last Time? The Traditional Graphics Pipeline Participating Media Measuring BRDFs 3D Digitizing & Scattering BSSRDFs Monte Carlo Simulation Dipole Approximation Today Ray Casting / Tracing Advantages? Ray
More informationRAYTRACING. Christopher Peters INTRODUCTION TO COMPUTER GRAPHICS AND INTERACTION. HPCViz, KTH Royal Institute of Technology, Sweden
DH2323 DGI15 INTRODUCTION TO COMPUTER GRAPHICS AND INTERACTION RAYTRACING HPCViz, KTH Royal Institute of Technology, Sweden http://kth.academia.edu/christopheredwardpeters Based on DGI12 notes by Carl
More informationRay Tracer Due date: April 27, 2011
Computer graphics Assignment 4 1 Overview Ray Tracer Due date: April 27, 2011 In this assignment you will implement the camera and several primitive objects for a ray tracer, and a basic ray tracing algorithm.
More informationComputer Graphics. Lecture 10. Global Illumination 1: Ray Tracing and Radiosity. Taku Komura 12/03/15
Computer Graphics Lecture 10 Global Illumination 1: Ray Tracing and Radiosity Taku Komura 1 Rendering techniques Can be classified as Local Illumination techniques Global Illumination techniques Local
More informationComputer Graphics. Lecture 9 Environment mapping, Mirroring
Computer Graphics Lecture 9 Environment mapping, Mirroring Today Environment Mapping Introduction Cubic mapping Sphere mapping refractive mapping Mirroring Introduction reflection first stencil buffer
More informationEffects needed for Realism. Ray Tracing. Ray Tracing: History. Outline. Foundations of Computer Graphics (Spring 2012)
Foundations of omputer Graphics (Spring 202) S 84, Lecture 5: Ray Tracing http://inst.eecs.berkeley.edu/~cs84 Effects needed for Realism (Soft) Shadows Reflections (Mirrors and Glossy) Transparency (Water,
More informationThe Traditional Graphics Pipeline
Final Projects Proposals due Thursday 4/8 Proposed project summary At least 3 related papers (read & summarized) Description of series of test cases Timeline & initial task assignment The Traditional Graphics
More informationRay Tracing. Outline. Ray Tracing: History
Foundations of omputer Graphics Online Lecture 9: Ray Tracing 1 History and asic Ray asting Ravi Ramamoorthi Effects needed for Realism (Soft) Shadows Reflections (Mirrors and Glossy) Transparency (Water,
More informationComputer Graphics (CS 543) Lecture 13b Ray Tracing (Part 1) Prof Emmanuel Agu. Computer Science Dept. Worcester Polytechnic Institute (WPI)
Computer Graphics (CS 543) Lecture 13b Ray Tracing (Part 1) Prof Emmanuel Agu Computer Science Dept. Worcester Polytechnic Institute (WPI) Raytracing Global illumination-based rendering method Simulates
More informationProgramming projects. Assignment 1: Basic ray tracer. Assignment 1: Basic ray tracer. Assignment 1: Basic ray tracer. Assignment 1: Basic ray tracer
Programming projects Rendering Algorithms Spring 2010 Matthias Zwicker Universität Bern Description of assignments on class webpage Use programming language and environment of your choice We recommend
More informationPipeline Operations. CS 4620 Lecture 10
Pipeline Operations CS 4620 Lecture 10 2008 Steve Marschner 1 Hidden surface elimination Goal is to figure out which color to make the pixels based on what s in front of what. Hidden surface elimination
More informationCS 465 Program 5: Ray II
CS 465 Program 5: Ray II out: Friday 2 November 2007 due: Saturday 1 December 2007 Sunday 2 December 2007 midnight 1 Introduction In the first ray tracing assignment you built a simple ray tracer that
More information6.837 Introduction to Computer Graphics Final Exam Tuesday, December 20, :05-12pm Two hand-written sheet of notes (4 pages) allowed 1 SSD [ /17]
6.837 Introduction to Computer Graphics Final Exam Tuesday, December 20, 2011 9:05-12pm Two hand-written sheet of notes (4 pages) allowed NAME: 1 / 17 2 / 12 3 / 35 4 / 8 5 / 18 Total / 90 1 SSD [ /17]
More informationRay Tracing. CS116B Chris Pollett Apr 20, 2004.
Ray Tracing CS116B Chris Pollett Apr 20, 2004. Outline Basic Ray-Tracing Intersections Basic Ray-Tracing Reference Point (i,j) Projection Plane Have a set up like in the above picture. Shoot rays from
More informationRay Tracing I. Internet Raytracing Competition
History Ray Tracing came from the Physics of lens making. The process was that of drawing lines or rays through a glass shape to determine it s lens properties. It is also related to early perspective
More informationCS5620 Intro to Computer Graphics
So Far wireframe hidden surfaces Next step 1 2 Light! Need to understand: How lighting works Types of lights Types of surfaces How shading works Shading algorithms What s Missing? Lighting vs. Shading
More informationEffects needed for Realism. Computer Graphics (Fall 2008) Ray Tracing. Ray Tracing: History. Outline
Computer Graphics (Fall 2008) COMS 4160, Lecture 15: Ray Tracing http://www.cs.columbia.edu/~cs4160 Effects needed for Realism (Soft) Shadows Reflections (Mirrors and Glossy) Transparency (Water, Glass)
More informationAcceleration Data Structures
CT4510: Computer Graphics Acceleration Data Structures BOCHANG MOON Ray Tracing Procedure for Ray Tracing: For each pixel Generate a primary ray (with depth 0) While (depth < d) { Find the closest intersection
More informationLecture 8 Ray tracing Part 1: Basic concept Yong-Jin Liu.
Fundamentals of Computer Graphics Lecture 8 Ray tracing Part 1: Basic concept Yong-Jin Liu liuyongjin@tsinghua.edu.cn Material by S.M.Lea (UNC) Goals To set up the mathematics and algorithms to perform
More informationThe Traditional Graphics Pipeline
Last Time? The Traditional Graphics Pipeline Reading for Today A Practical Model for Subsurface Light Transport, Jensen, Marschner, Levoy, & Hanrahan, SIGGRAPH 2001 Participating Media Measuring BRDFs
More informationLecture 19: All Together with Refraction
Lecture 19: All Together with Refraction December 1, 2016 12/1/16 CSU CS410 Fall 2016, Ross Beveridge & Bruce Draper 1 How about Interreflections? Note reflections Granite tabletop Visible on base Also
More informationCS 488. More Shading and Illumination. Luc RENAMBOT
CS 488 More Shading and Illumination Luc RENAMBOT 1 Illumination No Lighting Ambient model Light sources Diffuse reflection Specular reflection Model: ambient + specular + diffuse Shading: flat, gouraud,
More informationThe exam begins at 2:40pm and ends at 4:00pm. You must turn your exam in when time is announced or risk not having it accepted.
CS 184: Foundations of Computer Graphics page 1 of 10 Student Name: Class Account Username: Instructions: Read them carefully! The exam begins at 2:40pm and ends at 4:00pm. You must turn your exam in when
More informationTo Shading and Beyond. CS 6965 Fall 2011
To Shading and Beyond Program 1 Questions on program 1? Running simhwrt 2 Program 1 fix 3 simhwrt Can set scene and image size --no-scene --width 256 --height 256 Can set number of TMs and threads per
More informationAssignment 6: Ray Tracing
Assignment 6: Ray Tracing Programming Lab Due: Monday, April 20 (midnight) 1 Introduction Throughout this semester you have written code that manipulated shapes and cameras to prepare a scene for rendering.
More informationLecture 11: Ray tracing (cont.)
Interactive Computer Graphics Ray tracing - Summary Lecture 11: Ray tracing (cont.) Graphics Lecture 10: Slide 1 Some slides adopted from H. Pfister, Harvard Graphics Lecture 10: Slide 2 Ray tracing -
More informationgraphics pipeline computer graphics graphics pipeline 2009 fabio pellacini 1
graphics pipeline computer graphics graphics pipeline 2009 fabio pellacini 1 graphics pipeline sequence of operations to generate an image using object-order processing primitives processed one-at-a-time
More informationRaycast Rendering Maya 2013
2000 2012 Michael O'Rourke Raycast Rendering Maya 2013 (See also the Intro to Lights and Rendering tutorial for an introduction to the basics of rendering an image) Concept There are several algorithms
More informationgraphics pipeline computer graphics graphics pipeline 2009 fabio pellacini 1
graphics pipeline computer graphics graphics pipeline 2009 fabio pellacini 1 graphics pipeline sequence of operations to generate an image using object-order processing primitives processed one-at-a-time
More informationMITOCW MIT6_172_F10_lec18_300k-mp4
MITOCW MIT6_172_F10_lec18_300k-mp4 The following content is provided under a Creative Commons license. Your support will help MIT OpenCourseWare continue to offer high quality educational resources for
More informationChapter 7 - Light, Materials, Appearance
Chapter 7 - Light, Materials, Appearance Types of light in nature and in CG Shadows Using lights in CG Illumination models Textures and maps Procedural surface descriptions Literature: E. Angel/D. Shreiner,
More informationTDA361/DIT220 Computer Graphics, January 15 th 2016
TDA361/DIT220 Computer Graphics, January 15 th 2016 EXAM (Same exam for both CTH- and GU students) Friday January 15 th, 2016, 8.30 12.30 Examiner Ulf Assarsson, tel. 0701-738535 Permitted Technical Aids
More informationComputer Graphics. - Ray Tracing I - Marcus Magnor Philipp Slusallek. Computer Graphics WS05/06 Ray Tracing I
Computer Graphics - Ray Tracing I - Marcus Magnor Philipp Slusallek Overview Last Lecture Introduction Today Ray tracing I Background Basic ray tracing What is possible? Recursive ray tracing algorithm
More informationRay Tracing. CS334 Fall Daniel G. Aliaga Department of Computer Science Purdue University
Ray Tracing CS334 Fall 2013 Daniel G. Aliaga Department of Computer Science Purdue University Ray Casting and Ray Tracing Ray Casting Arthur Appel, started around 1968 Ray Tracing Turner Whitted, started
More informationMotivation. Sampling and Reconstruction of Visual Appearance. Effects needed for Realism. Ray Tracing. Outline
Sampling and Reconstruction of Visual Appearance CSE 274 [Fall 2018], Special Lecture Ray Tracing Ravi Ramamoorthi http://www.cs.ucsd.edu/~ravir Motivation Ray Tracing is a core aspect of both offline
More information03 RENDERING PART TWO
03 RENDERING PART TWO WHAT WE HAVE SO FAR: GEOMETRY AFTER TRANSFORMATION AND SOME BASIC CLIPPING / CULLING TEXTURES AND MAPPING MATERIAL VISUALLY DISTINGUISHES 2 OBJECTS WITH IDENTICAL GEOMETRY FOR NOW,
More informationCS 148, Summer 2012 Introduction to Computer Graphics and Imaging Justin Solomon
http://www.futuretech.blinkenlights.nl/misc/scene_1024x768.jpg CS 148, Summer 2012 Introduction to Computer Graphics and Imaging Justin Solomon http://www.publicdomainpictures.net/view-image.php?picture=female-photographer&image=4360&large=1
More informationCS3500 Computer Graphics Module: Lighting and Shading
Computer Graphics Module: Lighting and Shading P. J. Narayanan Spring 2009 We know which pixels of the frame buffer belongs to which object after visibility and scan conversion. What colour to give to
More informationPhotorealism. Photorealism: Ray Tracing. Ray Tracing
CS 460 Computer Graphics Professor Richard Eckert Ray Tracing Texture Mapping Radiosity Photorealism April 30, 2004 Photorealism -- Taking into Account Global Illumination Light can arrive at surfaces
More informationAnnouncements. Written Assignment 2 out (due March 8) Computer Graphics
Announcements Written Assignment 2 out (due March 8) 1 Advanced Ray Tracing (Recursive) Ray Tracing Antialiasing Motion Blur Distribution Ray Tracing Ray Tracing and Radiosity Assumptions Simple shading
More informationRay-tracing Cont. Ray-tracing
Ray-tracing Cont. Ray-tracing light s-ray e-ray s-ray light Intersecting polygons starts with intersecting a plane 2 1 Shadow Rays Once an intersection is computed, we send a shadow ray to each light source
More information