internal static int PrepareVolumePreview(Material material, Texture texture, Vector3 scale, float opacity,
FilterMode filterMode, bool colorRamp, Gradient customColorRamp, Camera camera, Matrix4x4 trs, float qualityModifier = 2)
{
float inverseResolution;
Vector3 inverseScale;
PrepareGeneralPreview(material, texture, out inverseScale, out inverseResolution, customColorRamp);
uint colorChannelCount = GraphicsFormatUtility.GetColorComponentCount(texture.graphicsFormat);
material.SetVector(MaterialProps.globalScale, scale);
material.SetFloat(MaterialProps.ramp, Convert.ToSingle(colorRamp));
material.SetFloat(MaterialProps.invResolution, inverseResolution);
material.SetVector(MaterialProps.invChannels, new Vector3(1.0f / colorChannelCount, 1.0f / colorChannelCount, 1.0f / colorChannelCount));
material.SetFloat(MaterialProps.alpha, Mathf.Pow(Mathf.Clamp01(opacity), 3));
material.SetFloat(MaterialProps.filterMode, Convert.ToSingle(filterMode));
float quality = inverseResolution / qualityModifier / 2;
material.SetFloat(MaterialProps.quality, quality);
material.SetMatrix("_CamToW", camera.cameraToWorldMatrix);
material.SetMatrix("_WToCam", camera.worldToCameraMatrix);
material.SetMatrix("_ObjToW", trs);
material.SetMatrix("_WToObj", trs.inverse);
return(Convert.ToInt32(1 / inverseResolution * qualityModifier * 2));
}
void InitPreviewUtility()
{
if (m_PreviewUtility == null)
{
m_PreviewUtility = new PreviewRenderUtility();
m_PreviewUtility.camera.fieldOfView = 30.0f;
m_Preview3DMode = Preview3DMode.Volume;
m_Texture = target as Texture3D;
m_PreviewDir = new Vector2(0, 0);
m_Channels = Mathf.Clamp(GraphicsFormatUtility.GetColorComponentCount(m_Texture.graphicsFormat), 1, 3);
CalculateResolutionAndScale(m_Texture);
m_ViewDistance = Mathf.Lerp(1, 3, Mathf.Clamp01(m_Scale.magnitude - 0.414f));
m_PreviewUtility.camera.farClipPlane = s_MaxViewDistance + 1;
m_PreviewUtility.camera.nearClipPlane = 0.01f;
}
}
internal static void PrepareSlicePreview(Material material, Texture texture, Vector3 slice,
FilterMode filterMode, bool colorRamp = false, Gradient customColorRamp = null)
{
float inverseResolution;
Vector3 inverseScale;
PrepareGeneralPreview(material, texture, out inverseScale, out inverseResolution, customColorRamp);
uint colorChannelCount = GraphicsFormatUtility.GetColorComponentCount(texture.graphicsFormat);
Vector3 voxelSize = material.GetVector("_VoxelSize");
Vector3 textureResolution = GetTextureResolution(texture);
Vector3 positions = new Vector3(slice.x / textureResolution.x, slice.y / textureResolution.y, slice.z / textureResolution.z);
positions.x = Mathf.Clamp01(positions.x);
positions.y = Mathf.Clamp01(positions.y);
positions.z = Mathf.Clamp01(positions.z);
positions -= new Vector3(0.5f, 0.5f, 0.5f);
positions.Scale(voxelSize);
material.SetVector(MaterialProps.positions, positions);
material.SetVector(MaterialProps.invChannels, new Vector3(1.0f / colorChannelCount, 1.0f / colorChannelCount, 1.0f / colorChannelCount));
material.SetFloat(MaterialProps.filterMode, Convert.ToSingle(filterMode));
material.SetFloat(MaterialProps.ramp, Convert.ToSingle(colorRamp));
}