Update curveDetail docs

Author: ksen0

src/webgl/3d_primitives.js

@@ -2671,15 +2671,13 @@ function primitives3D(p5, fn){
    * In WebGL mode, smooth shapes are drawn using many flat segments. Adding
    * more flat segments makes shapes appear smoother.
    *
-   * The parameter, `detail`, is the number of segments to use while drawing a
-   * spline curve. For example, calling `curveDetail(5)` will use 5 segments to
-   * draw curves with the <a href="#/p5/curve">curve()</a> function. By
-   * default,`detail` is 20.
+   * The parameter, `detail`, is the density of segments to use while drawing a
+   * spline curve.
    *
    * Note: `curveDetail()` has no effect in 2D mode.
    *
    * @method curveDetail
-   * @param {Number} resolution number of segments to use. Defaults to 20.
+   * @param {Number} resolution number of segments to use. Default it 1/4
    * @chainable
    *
    * @example
@@ -2694,12 +2692,12 @@ function primitives3D(p5, fn){
    *   noFill();
    *   strokeWeight(1);
    *   stroke(0);
-   *   curve(5, 26, 73, 24, 73, 61, 15, 65);
+   *   spline(5, 26, 73, 24, 73, 61, 15, 65);
    *
    *   // Draw red spline curves from the anchor points to the control points.
    *   stroke(255, 0, 0);
-   *   curve(5, 26, 5, 26, 73, 24, 73, 61);
-   *   curve(73, 24, 73, 61, 15, 65, 15, 65);
+   *   spline(5, 26, 5, 26, 73, 24, 73, 61);
+   *   spline(73, 24, 73, 61, 15, 65, 15, 65);
    *
    *   // Draw the anchor points in black.
    *   strokeWeight(5);
@@ -2726,19 +2724,19 @@ function primitives3D(p5, fn){
    *
    *   background(200);
    *
-   *   // Set the curveDetail() to 3.
-   *   curveDetail(3);
+   *   // Set the curveDetail() to 0.5
+   *   curveDetail(0.5);
    *
    *   // Draw a black spline curve.
    *   noFill();
    *   strokeWeight(1);
    *   stroke(0);
-   *   curve(-45, -24, 0, 23, -26, 0, 23, 11, 0, -35, 15, 0);
+   *   spline(-45, -24, 0, 23, -26, 0, 23, 11, 0, -35, 15, 0);
    *
    *   // Draw red spline curves from the anchor points to the control points.
-   *   stroke(255, 0, 0);
-   *   curve(-45, -24, 0, -45, -24, 0, 23, -26, 0, 23, 11, 0);
-   *   curve(23, -26, 0, 23, 11, 0, -35, 15, 0, -35, 15, 0);
+   *   spline(255, 0, 0);
+   *   spline(-45, -24, 0, -45, -24, 0, 23, -26, 0, 23, 11, 0);
+   *   spline(23, -26, 0, 23, 11, 0, -35, 15, 0, -35, 15, 0);
    *
    *   // Draw the anchor points in black.
    *   strokeWeight(5);