public override void Interp(Texture from, Texture to, float t)
{
if (from == null || to == null)
{
base.Interp(from, to, t);
return;
}
var format = TextureFormatUtilities.GetUncompressedRenderTextureFormat(to);
var rt = RuntimeUtilities.GetLerpTarget(to.width, to.height, format);
var material = RuntimeUtilities.lerpMaterial;
material.SetTexture("_From", from);
material.SetTexture("_To", to);
material.SetFloat("_Interp", t);
Graphics.SetRenderTarget(rt);
material.SetPass(0);
Graphics.DrawMeshNow(RuntimeUtilities.fullscreenTriangle, Matrix4x4.identity);
value = rt;
}
internal Texture Lerp(Texture from, Texture to, float t)
{
Assert.IsNotNull(from);
Assert.IsNotNull(to);
bool is3d = to is Texture3D ||
(to is RenderTexture && ((RenderTexture)to).volumeDepth > 1);
RenderTexture rt = null;
if (is3d)
{
int size = to.width;
rt = Get(RenderTextureFormat.ARGBHalf, size, size, size, true);
var compute = m_Resources.computeShaders.texture3dLerp;
int kernel = compute.FindKernel("KTexture3DLerp");
m_Command.SetComputeVectorParam(compute, "_Params", new Vector4(t, size, 0f, 0f));
m_Command.SetComputeTextureParam(compute, kernel, "_Output", rt);
m_Command.SetComputeTextureParam(compute, kernel, "_From", from);
m_Command.SetComputeTextureParam(compute, kernel, "_To", to);
int groupSize = Mathf.CeilToInt(size / 8f);
m_Command.DispatchCompute(compute, kernel, groupSize, groupSize, groupSize);
}
else
{
var format = TextureFormatUtilities.GetUncompressedRenderTextureFormat(to);
rt = Get(format, to.width, to.height);
var sheet = m_PropertySheets.Get(m_Resources.shaders.texture2dLerp);
sheet.properties.SetTexture(Uniforms._To, to);
sheet.properties.SetFloat(Uniforms._Interp, t);
m_Command.BlitFullscreenTriangle(from, rt, sheet, 0);
}
return(rt);
}