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More trig functions

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francisli
2005-03-24 18:06:42 +00:00
parent 702959d94a
commit feed508dbb
1 changed files with 12 additions and 7 deletions
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19
mobile/core/processing/core/PMIDlet.java
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@@ -398,41 +398,46 @@ public abstract class PMIDlet extends MIDlet implements Runnable {
public static final int HALF_PI = PI / 2;
/** Multiplies two fixed point values and returns a fixed point value. */
public static final int mul(int value1, int value2) {
public final int mul(int value1, int value2) {
return (value1 * value2) >> FP_PRECISION;
}
/** Returns the fixed point quotient from dividing the fixed point dividend by the fixed point divisor. */
public static final int div(int dividend, int divisor) {
public final int div(int dividend, int divisor) {
return (dividend << FP_PRECISION) / divisor;
}
/** Returns the fixed point representation of the specified integer value. */
public static final int itofp(int value1) {
public final int itofp(int value1) {
return value1 << FP_PRECISION;
}
/** Returns the closest integer value less than or equal to the specified fixed point value. */
public static final int floor(int value1) {
public final int floor(int value1) {
return value1 >> FP_PRECISION;
}
/** Returns the fixed point radian equivalent to the specified fixed point degree value. */
public final int radians(int angle) {
return angle * PI / (180 << FP_PRECISION);
}
/** Returns the sin of the specified fixed-point radian angle as a fixed point value. */
public static final int sin(int rad) {
public final int sin(int rad) {
//// convert to degrees
int index = rad * 180 / PI % 360;
return sin[index];
}
/** Returns the cos of the specified fixed-point radian angle as a fixed point value. */
public static final int cos(int rad) {
public final int cos(int rad) {
//// convert to degrees
int index = (rad * 180 / PI + 90) % 360;
return sin[index];
}
/** Lookup table for sin function, indexed by degrees. */
private static final int[] sin = {
public static final int[] sin = {
(int) (0f * ONE),
(int) (0.0174524064372835f * ONE),
(int) (0.034899496702501f * ONE),