Bézier curves/Intersections: Difference between revisions
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(→C implementation 2: Added gnu::const attributes to try to help an optimizer.) |
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// Convert a non-parametric spline from Bernstein basis to s-power. |
// Convert a non-parametric spline from Bernstein basis to s-power. |
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spower_spline |
[[gnu::const]] spower_spline |
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bernstein_spline_to_spower (bernstein_spline S) |
bernstein_spline_to_spower (bernstein_spline S) |
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{ |
{ |
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// requires two applications of de Casteljau subdivision. On the other |
// requires two applications of de Casteljau subdivision. On the other |
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// hand, subdivision requires two applications of the following. |
// hand, subdivision requires two applications of the following. |
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inline spower_spline |
[[gnu::const]] inline spower_spline |
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spower_spline_portion (spower_spline S, double t0, double t1) |
spower_spline_portion (spower_spline S, double t0, double t1) |
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{ |
{ |
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} |
} |
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inline spower_curve |
[[gnu::const]] inline spower_curve |
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spower_curve_portion (spower_curve C, double t0, double t1) |
spower_curve_portion (spower_curve C, double t0, double t1) |
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{ |
{ |
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// Given a parametric curve, is it "flat enough" to have its quadratic |
// Given a parametric curve, is it "flat enough" to have its quadratic |
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// terms removed? |
// terms removed? |
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[[gnu::const]] inline bool |
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bool |
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flat_enough (spower_curve C, double tol) |
flat_enough (spower_curve C, double tol) |
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{ |
{ |
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