https://gamedev.stackexchange.com/questions/96051/unity-5-how-to-get-a-shadowmap
UNITY_DECLARE_SHADOWMAP(tex) - declares a shadowmap texture variable with name “tex”. UNITY_SAMPLE_SHADOW(tex,uv) - samples shadowmap texture “tex” at given “uv” coordinate (XY components are texture location, Z component is depth to compare with). Returns single float value with the shadow term in 0..1 range. UNITY_SAMPLE_SHADOW_PROJ(tex,uv) - similar to above, but does a projective shadowmap read. “uv” is a float4, all other components are divided by .w for doing the lookup.
https://docs.unity3d.com/Manual/SL-BuiltinMacros.html
https://docs.unity3d.com/ScriptReference/Rendering.CommandBuffer.SetShadowSamplingMode.html
using UnityEngine; using UnityEngine.Rendering;
[RequireComponent(typeof(Camera))] public class RawShadowmapDepth : MonoBehaviour { public Light m_Light; RenderTexture m_ShadowmapCopy;
void Start() { RenderTargetIdentifier shadowmap = BuiltinRenderTextureType.CurrentActive; m_ShadowmapCopy = new RenderTexture(1024, 1024, 0); CommandBuffer cb = new CommandBuffer();
// Change shadow sampling mode for m_Light's shadowmap. cb.SetShadowSamplingMode(shadowmap, ShadowSamplingMode.RawDepth);
// The shadowmap values can now be sampled normally - copy it to a different render texture. cb.Blit(shadowmap, new RenderTargetIdentifier(m_ShadowmapCopy));
// Execute after the shadowmap has been filled. m_Light.AddCommandBuffer(LightEvent.AfterShadowMap, cb);
// Sampling mode is restored automatically after this command buffer completes, so shadows will render normally. }
void OnRenderImage(RenderTexture src, RenderTexture dest) { // Display the shadowmap in the corner. Camera.main.rect = new Rect(0, 0, 0.5f, 0.5f); Graphics.Blit(m_ShadowmapCopy, dest); Camera.main.rect = new Rect(0, 0, 1, 1); } }
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拿 _CameraDepthTexture
https://docs.unity3d.com/Manual/SL-CameraDepthTexture.html
声明下
_CameraDepthTexture就可以了