FazBrowse GitHub Viewer | Trending |
URL:
| Home
Tools: [Download Repo ZIP]   [Original HTTPS Page]

Performance: inline the Bernstein functions by ruevs · Pull Request #780 · solvespace/solvespace · GitHub

/ solvespace Public

Performance: inline the Bernstein functions #780

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
phkahler merged 1 commit into from
Oct 25, 2020
Conversation 0 Commits 1 Checks 0 Files changed
Merged

Performance: inline the Bernstein functions #780

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension .cpp  (1) All 1 file type selected
Viewed files
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Unified
Split
Hide whitespace
Diff view
Unified
Split
Hide whitespace
12 changes: 4 additions & 8 deletions src/srf/ratpoly.cpp
Show comments
View file
Open in desktop
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters
Show hidden characters
Original file line number Diff line number Diff line change
Expand Up @@ -13,30 +13,26 @@
// and convergence should be fast by now.
#define RATPOLY_EPS (LENGTH_EPS/(1e2))

static double Bernstein(int k, int deg, double t)
{
static inline double Bernstein(int k, int deg, double t) {
// indexed by [degree][k][exponent]
static const double bernstein_coeff[4][4][4] = {
{ { 1.0,0.0,0.0,0.0 }, { 1.0,0.0,0.0,0.0 }, { 1.0,0.0,0.0,0.0 }, { 1.0,0.0,0.0,0.0 } },
{ { 1.0,-1.0,0.0,0.0 }, { 0.0,1.0,0.0,0.0 }, { 0.0,0.0,0.0,0.0 }, { 0.0,0.0,0.0,0.0 } },
{ { 1.0,-2.0,1.0,0.0 }, { 0.0,2.0,-2.0,0.0 },{ 0.0,0.0,1.0,0.0 }, { 0.0,0.0,0.0,0.0 } },
{ { 1.0,-3.0,3.0,-1.0 },{ 0.0,3.0,-6.0,3.0 },{ 0.0,0.0,3.0,-3.0}, { 0.0,0.0,0.0,1.0 } } };

const double *c;
c = bernstein_coeff[deg][k];
const double *c = bernstein_coeff[deg][k];
return (((c[3]*t+c[2])*t)+c[1])*t+c[0];
}

static double BernsteinDerivative(int k, int deg, double t)
{
static inline double BernsteinDerivative(int k, int deg, double t) {
static const double bernstein_derivative_coeff[4][4][3] = {
{ { 0.0,0.0,0.0 }, { 0.0,0.0,0.0 }, { 0.0,0.0,0.0 }, { 0.0,0.0,0.0 } },
{ { -1.0,0.0,0.0 }, { 1.0,0.0,0.0 }, { 0.0,0.0,0.0 }, { 0.0,0.0,0.0 } },
{ { -2.0,2.0,0.0 }, { 2.0,-4.0,0.0 },{ 0.0,2.0,0.0 }, { 0.0,0.0,0.0 } },
{ { -3.0,6.0,-3.0 },{ 3.0,-12.0,9.0 },{ 0.0,6.0,-9.0}, { 0.0,0.0,3.0 } } };

const double *c;
c = bernstein_derivative_coeff[deg][k];
const double *c = bernstein_derivative_coeff[deg][k];
return ((c[2]*t)+c[1])*t+c[0];
}

Expand Down
Back | FazBrowse Home | New Git URL