Javier Gonzalez-Sanchez | SER431 | Fall 2018 | 3 jgs Multi-scale Function Adding Noise over diverse frequencies and amplitudes )) * , * , * ( * ) , , ( 1 r scale t scale s scale noise amplitude r t s f i i i bands i i å = - =
Javier Gonzalez-Sanchez | SER431 | Fall 2018 | 4 jgs Sum of Absolute Values Adding Noise over absolute values is Good for fire )) , , ( ( ) , , ( 1 r scale t scale s scale noise amplitude r t s f i i i bands i i å = - =
Javier Gonzalez-Sanchez | SER431 | Fall 2018 | 5 jgs Marble Principle ))) , , ( ( * sin( ) , , ( 4 1 r scale t scale s scale noise amplitude s r t s f i i i i i å = - = Using sin( ) function plus noise
Javier Gonzalez-Sanchez | SER431 | Fall 2018 | 6 jgs Marble Example § MarbleMap is from black to white § Scale scales [min, max] to [0,1] § u and v are in range [0,1] § Does not look that great, maybe a more complex color ramp is needed )) ) 5 . 11 , * 2 * 5 , * 2 * 5 ( * 2 * 6 * 20 sin ( ( ) , ( 4 1 ÷ ø ö ç è æ + = å = - v u PNoise u Scale MarbleMap v u Texture i i i i
Javier Gonzalez-Sanchez | SER431 | Fall 2018 | 9 jgs §Axis-aligned Bounding Box (AABB) § An AABB is defined by its minimal and maximal positions in space Pmin=(xmin, ymin, zmin), Pmax = (xmax, ymax, zmax) § Calculate Initialize pmin to +infinite or the first vertex Initialize pmax to –infinite or the first vertex foreach vertex p do { if (p.x < pmin.x) then pmin.x = p.x if (p.y < pmin.y) then pmin.y = p.y if (p.z > pmax.z) then pmax.z = p.z }
Javier Gonzalez-Sanchez | SER431 | Fall 2018 | 12 jgs Concepts § What is the shadow matrix? § What is the stencil buffer? § What is double blending and how to avoid it?
Javier Gonzalez-Sanchez | SER431 | Fall 2018 | 17 jgs Culling Face void display(void) { glEnable(GL_CULL_FACE); // checks all the faces that are front facing towards // the viewer and renders those while discarding all // the faces that are back facing // Improve performance also! glDisable(GL_CULL_FACE); }
Javier Gonzalez-Sanchez | SER431 | Fall 2018 | 18 jgs Fog glEnable(GL_FOG); // specifies the equation to be used to compute the fog blend factor. // GL_LINEAR, GL_EXP, and GL_EXP2. // initial fog mode is GL_EXP glFogi(GL_FOG_MODE, GL_LINEAR); // the fog color. Color components are in the range [0,1]. // the initial fog color is (0, 0, 0, 0). GLfloat fogColor[4] = { 0.5, 0.5, 0.5, 1.0 }; glFogfv(GL_FOG_COLOR, fogColor); //Used in exponential fog equations. The initial fog density is 1. // Only nonnegative densities are accepted. glFogf(GL_FOG_DENSITY, 0.25); // the near distance used in the linear fog equation. The initial near distance is 0 glFogf(GL_FOG_START, 10.0); // the far distance used in the linear fog equation. The initial far distance is 1. glFogf(GL_FOG_END, 6000.0);
Javier Gonzalez-Sanchez | SER431 | Fall 2018 | 24 jgs Curves § What is a Curve? § What is Curvature? § Parametric Representation § Curve equation (general) § Control Graph § Control Point § Tangent
Javier Gonzalez-Sanchez | SER431 | Fall 2018 | 31 jgs Disclaimer This list of topics is not Comprehensive For a full list of topics review lectures 1 to 16
jgs SER431 Advanced Graphics Javier Gonzalez-Sanchez [email protected] Fall 2018 Disclaimer. These slides can only be used as study material for the class SER431 at ASU. They cannot be distributed or used for another purpose.
javiergs
efbmzwyk999
hsawaji
mot_techtalk
jmatsu
nacatl
minma_curama
rabbitmagician1
pulse1923
teamlab
terhechte
ivargrimstad
dalinaum
tmm1
jponch
eileencodes
cherdarchuk
chrislema
brettharned
cromwellryan
deanohume
chrisshort
carmenintech
geeforr