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Name | curveTangent() |
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Examples | noFill(); curve(5, 26, 73, 24, 73, 61, 15, 65); int steps = 6; for (int i = 0; i <= steps; i++) { float t = i / float(steps); float x = curvePoint(5, 73, 73, 15, t); float y = curvePoint(26, 24, 61, 65, t); //ellipse(x, y, 5, 5); float tx = curveTangent(5, 73, 73, 15, t); float ty = curveTangent(26, 24, 61, 65, t); float a = atan2(ty, tx); a -= PI/2.0; line(x, y, cos(a)*8 + x, sin(a)*8 + y); } | ||||||||||
Description | Calculates the tangent of a point on a curve. There's a good definition of tangent on Wikipedia. | ||||||||||
Syntax | curveTangent(a, b, c, d, t) | ||||||||||
Parameters |
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Returns | float | ||||||||||
Related | curve() curveVertex() curvePoint() bezierTangent() |