绝区零自发光刀痕效果

绝区零自定义自发光刀痕印花ShaderGraph

Github源码传送门————>SlashDecal_ZenlessZoneZero

Bilibili教程传送门————>游戏开发糊弄学——小祥带你实现绝区零自发光刀痕效果

整体思路
慢放实机画面可以看到，刀痕实际上并非通过武器与墙面碰撞产生拟真的刀痕，而是再挥刀动画的某个时间点向挥刀的方向投射印花，将刀痕贴图投射到墙面上。所以整个流程是按下攻击键->播放攻击动画->动画中段触发事件->创建印花投射器产生印花->控制自发光属性->自发光和印花淡出->销毁印花。直接使用Unity里HDRP自带的Decal系统来实现这个效果。
提取到贴图有三种

BaseMap 基础纹理贴图
NormalMap 法线贴图
MaskMap 材质属性贴图

ShaderGraph

这里我觉得MaskMap的B和A通道都像是自发光遮罩所以都用起来了

Decal.cs

public class Decal : MonoBehaviour
{
    private DecalProjector decalProjector;
    private Material decalMaterial;

    private void Start()
    {
        decalProjector = GetComponent<DecalProjector>();
        decalProjector.material = Instantiate(decalProjector.material);
        decalMaterial = decalProjector.material;

        DecalAnimation();
    }

    private void DecalAnimation()
    {
        decalProjector.fadeFactor = 0.3f;
        decalMaterial.SetFloat("_EmissionIntensity", 70f);

        DOVirtual.Float(70f, 100f, 1f, (value) => { decalMaterial.SetFloat("_EmissionIntensity", value); })
            .OnComplete(() => 
            {
                DOVirtual.Float(100f, 0f, 2f, (value) => { decalMaterial.SetFloat("_EmissionIntensity", value); })
                .SetEase(Ease.Linear);

                DOVirtual.Float(0.3f, 0f, 3f, (value) => { decalProjector.fadeFactor = value; })
                .OnComplete(() => { Destroy(gameObject); })
                .SetEase(Ease.Linear)
                .SetDelay(1f);
            })
            .SetEase(Ease.Linear);
    }
}