add approx functions

Author: zxx43

cocos/core/math/utils.ts

@@ -69,6 +69,58 @@ export function approx (a: number, b: number, maxDiff?: number): boolean {
     return mathAbs(a - b) <= maxDiff;
 }
 
+/**
+ * @en Tests whether or not the first argument is approximately greater than or equal to the second
+ * @zh 测试第一个参数是否近似大于或等于第二个参数
+ * @param a The first number to test
+ * @param b The second number to test
+ * @param maxDiff Maximum difference (default: EPSILON)
+ * @return True if a is approximately greater than or equal to b, false otherwise
+ */
+export function approxGE (a: number, b: number, maxDiff?: number): boolean {
+    maxDiff = maxDiff || EPSILON;
+    return a >= b - maxDiff;
+}
+
+/**
+ * @en Tests whether or not the first argument is approximately less than or equal to the second
+ * @zh 测试第一个参数是否近似小于或等于第二个参数
+ * @param a The first number to test
+ * @param b The second number to test
+ * @param maxDiff Maximum difference (default: EPSILON)
+ * @return True if a is approximately less than or equal to b, false otherwise
+ */
+export function approxLE (a: number, b: number, maxDiff?: number): boolean {
+    maxDiff = maxDiff || EPSILON;
+    return a <= b + maxDiff;
+}
+
+/**
+ * @en Tests whether or not the first argument is approximately greater than the second
+ * @zh 测试第一个参数是否近似大于第二个参数
+ * @param a The first number to test
+ * @param b The second number to test
+ * @param maxDiff Maximum difference (default: EPSILON)
+ * @return True if a is approximately greater than b, false otherwise
+ */
+export function approxGT (a: number, b: number, maxDiff?: number): boolean {
+    maxDiff = maxDiff || EPSILON;
+    return a > b + maxDiff;
+}
+
+/**
+ * @en Tests whether or not the first argument is approximately less than the second
+ * @zh 测试第一个参数是否近似小于第二个参数
+ * @param a The first number to test
+ * @param b The second number to test
+ * @param maxDiff Maximum difference (default: EPSILON)
+ * @return True if a is approximately less than b, false otherwise
+ */
+export function approxLT (a: number, b: number, maxDiff?: number): boolean {
+    maxDiff = maxDiff || EPSILON;
+    return a < b - maxDiff;
+}
+
 /**
  * @en Clamps a value between a minimum float and maximum float value.<br/>
  * @zh 返回最小浮点数和最大浮点数之间的一个数值。可以使用 clamp 函数将不断变化的数值限制在范围内。

cocos/particle/burst.ts

@@ -23,7 +23,7 @@
 */
 
 import { ccclass, type, serializable, editable, range } from 'cc.decorator';
-import { repeat } from '../core/math';
+import { approxGE, approxLT, repeat } from '../core/math';
 import CurveRange from './animator/curve-range';
 import type { ParticleSystem } from './particle-system';
 
@@ -108,7 +108,7 @@ export default class Burst {
             let preFrameTime = repeat(psys.time - psys.startDelay.evaluate(0, 1), psys.duration) - dt;
             preFrameTime = (preFrameTime > 0.0) ? preFrameTime : 0.0;
             const curFrameTime = repeat(psys.time - psys.startDelay.evaluate(0, 1), psys.duration);
-            if (this._curTime >= preFrameTime && this._curTime < curFrameTime) {
+            if (approxGE(this._curTime, preFrameTime) && approxLT(this._curTime, curFrameTime)) {
                 psys.emit(this.count.evaluate(this._curTime / psys.duration, 1), dt - (curFrameTime - this._curTime));
                 this._curTime += this.repeatInterval;
                 --this._remainingCount;