79 lines
2.8 KiB
C#
79 lines
2.8 KiB
C#
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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// Example volume switching script
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//
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// The high-level logic is following:
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//
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// - Volumes overlap each other a bit, so we don't need blending! The size of the overlap is the size of your largest dynamic object.
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// - As object enters the volume, set volume data to it. Increment the counter.
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// - As object leaves the volume, decrement the counter. If it equals 0, use global volume (set empty property block).
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// - If the volume is moving, set volume data every frame, in LateUpdate.
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//
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public class BakeryVolumeTrigger : MonoBehaviour
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{
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public bool movable;
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BakeryVolume vol;
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MaterialPropertyBlock mb; // current volume shader properties
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static MaterialPropertyBlock mbEmpty; // default empty block, no values (will revert to global volume)
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static int mVolumeMin, mVolumeInvSize; // shader property IDs
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void Awake()
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{
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if (mbEmpty == null) mbEmpty = new MaterialPropertyBlock();
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// Create a MaterialPropertyBlock with Volume parameters for future use
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vol = GetComponent<BakeryVolume>();
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mb = new MaterialPropertyBlock();
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if (vol.bakedTexture0 != null)
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{
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mb.SetTexture("_Volume0", vol.bakedTexture0);
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mb.SetTexture("_Volume1", vol.bakedTexture1);
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mb.SetTexture("_Volume2", vol.bakedTexture2);
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if (vol.bakedTexture3 != null) mb.SetTexture("_Volume3", vol.bakedTexture3);
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}
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if (vol.bakedMask != null) mb.SetTexture("_VolumeMask", vol.bakedMask);
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if (mVolumeMin == 0) mVolumeMin = Shader.PropertyToID("_VolumeMin");
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if (mVolumeInvSize == 0) mVolumeInvSize = Shader.PropertyToID("_VolumeInvSize");
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mb.SetVector(mVolumeMin, vol.GetMin());
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mb.SetVector(mVolumeInvSize, vol.GetInvSize());
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if (vol.supportRotationAfterBake) mb.SetMatrix("_VolumeMatrix", vol.GetMatrix());
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}
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// Apply MaterialPropertyBlock to renderers entering the trigger
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void OnTriggerEnter(Collider c)
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{
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var rcv = c.GetComponent<BakeryVolumeReceiver>();
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if (rcv == null) return;
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Debug.Log(c.name + " entered " + this.name);
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rcv.enterCounter++;
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rcv.movableTrigger = movable ? this : null;
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rcv.SetPropertyBlock(mb);
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}
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// Handle exiting the trigger
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void OnTriggerExit(Collider c)
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{
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var rcv = c.GetComponent<BakeryVolumeReceiver>();
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if (rcv == null) return;
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Debug.Log(c.name + " exited " + this.name);
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// Only set empty property block, if the counter is 0 (= exited ALL volumes)
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rcv.enterCounter--;
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if (rcv.enterCounter == 0) rcv.SetPropertyBlock(mbEmpty);
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}
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public void UpdateBounds()
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{
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vol.UpdateBounds();
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mb.SetVector(mVolumeMin, vol.GetMin());
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mb.SetVector(mVolumeInvSize, vol.GetInvSize());
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}
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}
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