55 lines
1.8 KiB
Java
55 lines
1.8 KiB
Java
package uno.mloluyu.characters.effects;
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import com.badlogic.gdx.graphics.Color;
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import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
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import com.badlogic.gdx.math.MathUtils;
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/** 单个命中粒子：简单方块/短线喷射，带速度、重力与淡出。 */
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public class HitParticle {
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private float x, y;
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private float vx, vy;
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private float life; // 剩余寿命
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private final float totalLife;
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private final float size;
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private final Color color = new Color();
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private static final float GRAVITY = 900f; // 轻微下坠
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public HitParticle(float x, float y, Color base, float speedMin, float speedMax, float lifeMin, float lifeMax,
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float sizeMin, float sizeMax) {
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this.x = x;
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this.y = y;
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float ang = MathUtils.random(15f, 165f) * MathUtils.degreesToRadians; // 向上扇形
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float spd = MathUtils.random(speedMin, speedMax);
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this.vx = MathUtils.cos(ang) * spd;
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this.vy = MathUtils.sin(ang) * spd;
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this.life = MathUtils.random(lifeMin, lifeMax);
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this.totalLife = life;
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this.size = MathUtils.random(sizeMin, sizeMax);
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// 基础色随机稍许扰动
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float tint = MathUtils.random(0.85f, 1.05f);
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this.color.set(base.r * tint, base.g * tint, base.b * tint, 1f);
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}
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public boolean isAlive() {
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return life > 0f;
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}
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public void update(float dt) {
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if (!isAlive())
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return;
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life -= dt;
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// 运动积分
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x += vx * dt;
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y += vy * dt;
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vy -= GRAVITY * dt * 0.35f; // 轻微重力
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}
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public void render(ShapeRenderer sr) {
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if (!isAlive())
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return;
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float a = (life / totalLife); // 线性淡出
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sr.setColor(color.r, color.g, color.b, a);
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sr.rect(x - size / 2f, y - size / 2f, size, size);
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}
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}
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