Game Development Reference
In-Depth Information
Figure 10.35
Defining an x-intercept and setting the value for the x axis allows you to shift and invert a parabola.
6. In the lower-right panel, set the X Range From field to 8 and the To field
to 13.
7. To generate the graph, proceed to the lower-right panel and click the button
for Chart for Formula 1. You see a parabola that opens upward from the
x axis.
In Figure 10.35, the Cartesian plane shows the graphs of two equations. One
opens upward; the other opens downward. The equation that opens downward
reads y ¼ðx 4 Þ
2 . It is the same as the previous equation, except the value
that orients whether the parabola opens up or down is 1. To implement this
equation, use these steps:
1. Click the menu item for Subtract. To position the minus sign, click in the
lower equation composition area.
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