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Ray tracing algorithm Plane projection in drawing
https://www.cs.cornell.edu/courses/cs465/2007fa/stuff/03raytracing1_F07.pdf
– what objects are created for every ray? try to find a place for them where you can reuse them. – Shadow rays can be cheaper (any intersection will do, don’t need closest)
Ray tracing (graphics) - Wikipedia
https://en.wikipedia.org/wiki/Ray_tracing_(graphics)
Ray Tracing Basics I
http://cs.rit.edu/~jmg/courses/cgII/20072/slides/2-2-raytraceBasics1.pdf
Ray-Plane Intersection Ray - Plane Intersection For plane with equation: Plug in equation for ray and we get ( )/( ) ( ) n 0 n o o o P P F P D AdxBdyCdz ω Ax By Cz F=− • + • + − + + + = Ax+By+Cz+F=0 Ray-Plane Intesection If (P n • D) is 0 – then ray is parallel to plane, no intersection If ω is < 0 – then the ray intersects behind the
Viewing and Ray Tracing - Cornell University
https://www.cs.cornell.edu/courses/cs4620/2013fa/lectures/02view-ray.pdf
axonometric: projection plane perpendicular to projection direction but not parallel to coordinate planes oblique: projection plane parallel to a coordinate plane but not perpendicular to projection direction. 78] 11
Ray Tracing Notes - Middlebury College
https://www.cs.middlebury.edu/~candrews/classes/cs461/lectures/ray_tracing.pdf
Ray equations orthographic projection all of the rays should pass through the projection plane in parallel imagine a plane aligned with the lens of the camera we pick a point on this plane that corresponds to the pixel we want and then shoot a ray in the -Z direction to the projection plane (which can be anywhere in the -Z direction since this is parallel projection)
Ray Tracing - cc.gatech.edu
https://www.cc.gatech.edu/classes/AY2003/cs4451a_fall/raytracing.pdf
Substitute t1 or t0 into ray eq’s Surface normal rn = [Xn, Yn, Zn] = (ri - Sc)/Sr Ray/Plane Intersection Ray: R 0 = [X 0, Y 0, Z 0] R d = [X d, Y d, Z d] (normalized) where R(t) = R 0 + R dt, t>0 Plane: Ax + By + Cz + D = 0 P n = [A, B, C] for any [x,y,z], Ax + By + Cz + D = distance to plane
Lecture 12: Ray Tracing Basics - University of Washington
https://courses.cs.washington.edu/courses/cse457/99au/handouts/lectures/raytracing-basics.pdf
Why Ray Tracing? • So far, we can do ray casting: for each pixel in the projection plane, find the object visible at that pixel and apply your favorite shading model. • What does this model miss? 5 Forward Ray Tracing • Rays emanate from light sources and bounce around in the scene.
Overview: Ray Tracing & The Perspective Projection …
https://www.cs.colostate.edu/~cs410/yr2014fa/more_progress/L02_Overview.pdf
Ray Tracing (II) Step #2: 3D Camera model The image plane (representing film or a CCD/ CMOS chip) is a plane located in the 3D world model. This step calculates the 3D position of every pixel on that plane. 8/28/14 © Ross Beveridge & Bruce A. Draper, 2014 13 Ray Tracing (III) Step #3: Ray Casting Send a ray through every pixel, intersect rays with
Basic Ray Tracing - Inspiring Innovation
https://www.csee.umbc.edu/~adamb/435/Slides/raytrace.pdf
Ray Traced DOF • Move image plane out to focal plane • Jitter start position within lens aperture – Smaller aperture = closer to pinhole – Larger aperture = more DOF blur Glossy Reflection 49 Motion Blur • Things move while the shutter is open Ray Traced Motion Blur • Include information on object motion • Spread multiple rays per pixel across time
raycasting: how to properly apply a projection matrix?
https://stackoverflow.com/questions/2354821/raycasting-how-to-properly-apply-a-projection-matrix
The rays you generate will (in the post-projection transformed world) start at the origin and hit the rear clipping plane (located at z=-1). The "destination" of your first ray should be (-1, 1, -1) - the upper-left-hand corner of the far clipping plane. (Subsequent rays "destinations" are calculated based on the resolution of your viewport.)
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