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NavisWorks Presenter

1. Chapter 4 Presenter Lights 4 1 Lights Tab Like the Materials and Effects tabs the Lights tab is divided into two panes the archive on the left and the palette on the right The archive contains individual lights as well as light studios A light studio is a combination of lights that work well together The palette contains all the lights that are active in the scene To apply a light to the scene you drag it from an archive into the palette at which point you can edit its parameters if required The light is added to those already in the scene To apply a light studio to the scene you drag it from an archive into the palette All the lights in the light studio replace those already in the scene Light Studios are applied to the scene intelligently The light studio is oriented and scaled to match the scene to which it is being applied You can also expand a light studio in the archive and drag the lights into the palette individually If you do this the lights are not ori ented or scaled to match the scene Each light in the palette has a check box which can be used to turn the light on or off in the scene Presenter Ambient be lk Distant amp Eye Ambient Distant Point Spot hotorealistic Xx3 Default Eye Light hF hF Exterior fy ty Interior Distant Light 1 Distant Light 2 Object Projector B Render Clear The following sections will describe how to manage and edit lights for
2. at least 5 3 Foreground Effects Foreground effects obviously affect the foreground of the image when rendered and include fog and snow 19 Chapter 5 Rendering Effects effect None of these effects are available as an interactive preview and can only be seen when a full ren der is done To set up a foreground for your render simply drag your chosen foreground onto the palette on the right hand side of the tab To edit your chosen foreground effect simply double click on the effect in the palette The Foreground Editor dialog will appear Each editor will be different for each foreground type The Heavy Fog editor is shown here Foreground Editor Heavy Fog E x Distance 2 Fog Color Density Ignore Background x 9 E Note When the user profile see the section called Profiles in the chapter called Interface in the Roamer book for more information on this is set to Developer the dialog will include further more obscure parameters and allow you to change the type of foreground At any time click on the Apply button to apply the parameter edits to the scene You can save an edited foreground for use in other scenes by simply dragging it onto the User Fore ground archive Click OK to keep the changes made or Cancel to discard any changes made since the last time you clicked Apply at least 5 4 Rendering Styles Rendering styles affect the
3. in the scene see Chapter 6 for more details on this 3 Set up additional lights using the Lights tab see Section 4 1 for more details on how to do this 4 Additionally effects can be added to the render with the Effects tab see Section 5 1 for more details on these 5 Use the Rules tab to set up rules which define project wide material application see Chapter 7 for more details on this 6 At any point you can click on the Render button to start NavisWorks Presenter rendering the scene in the main navigation window This can of course be stopped by clicking on the button again which will have changed to Stop 7 Click on the Clear button to clear the render in the main navigation window and return to an OpenGL interactive view 8 If you want to save the render to a file or a printer you have to render directly to it by going to File Export Rendered Image The Export Rendered Image dialog will appear Chapter 2 Rendering Scenes Export Rendered Image 1 x Type EProgram Filez M av s Works 3examples qatehous Browse Size Type Explicit Width bbe Height bed Cancel E b Select a file type NavisWorks Presenter supports rendering to epx tga tif jog bmp PostScript ps QuickTime VR mov files C If you re rendering to a file rather than a printer Browse to a location and enter the name of the file you want to render to If you re rendering to a p
4. insertion into the scene 4 2 Managing Lights The palette is where you edit and manage your lights for your scene Lights are taken from the archives into the palette where they are edited 12 Chapter 4 Presenter Lights Managing Palette Lights Right click on a light in the right hand pane of the Lights tab the palette 2 Click Delete to delete the light from the palette This will also remove the light from the scene 3 Click Copy to copy the light to the clipboard Right click on an empty space in the palette and choose Paste to paste a copy of the light with a the same name suffixed with the next number in the list 4 Click Rename to rename the light You can also select the light and press F2 to rename it 5 Click Clear Palette to delete all the lights from the palette and hence from the scene 6 Click Edit or simply double click on a light to open the light editor dialog allowing you to edit its pa rameters See Section 4 3 for more information on this 4 3 Editing Lights You can edit a light in the palette by double clicking on it or right clicking and choosing Edit from the context menu There are five types of light visible in both OpenGL interactive renders and photorealistic renders 1 Ambient lights give a general background light to the scene and therefore only have intensity and color parameters 2 Eye lights are located at the viewpoint and also only have intensity and color parameter
5. material called floorboards without having to manually drag and drop the material on to each floorboard Each time the model is updated the rules then just need re applying rather than manually re applying them to all items Presenter E x Materials Lights Effects Texture Space Rules y name v Override ary current exact mappings Materials by name v Apply to current selection only Selection Sets by name Apply to all instances Apply Aules Render Clear All materials and rules can be saved in a NavisWorks palette nwp file which allows you to set up a palette of materials once for a project and re apply them to a model as it evolves or to another model in the same project that has been set up with the same layer names and or colors You can apply as many rules at once as all rules depend on material names Rules can be defined using the NavisWorks API but three pre defined rules are 1 Layers by name enables you to apply a material to named layers As an example if a layer is called Doors and you rename a material to Doors the spelling and case must be exactly the same as the layer s name then on applying this rule all layers named Doors will appear with the properties of that material when you check the rule Layers by name and click Apply Rules You can give multiple materials the name of different layers and apply this rule to all of the layers 2 Materials by name enables
6. off in in tensity However once we start using lights with real world fall off we start to produce images with a real world variation in luminance values In the real world the human eye is capable of resolving images in extremely varied lighting conditions ranging from bright sunshine reflecting off snow to a room lit only by a single candle In computer graphics on the other hand we need to produce an image on a display device which has a very limited range of lu minance values Therefore it is necessary to compress the range of luminance values found in a real world scene into the displayable range in such as way as to produce a realistic looking image Photography of course has exactly the same problem If a photographer or camera does not take into account the light levels in a scene before calculating the exposure of the shot the likely result will be an image which is either over exposed everything is too bright or under exposed everything is too dark A professional photographer will also use different speeds of film for different lighting conditions The aim is to produce an image on film that is representative of how that scene would have looked to a human ob server Presenter includes an Auto Exposure option goto Tools Global Options Presenter to change it When enabled Presenter will render the image twice Once to sample the range of luminance values in the output image then a second time to render the actual image
7. variations in the medium Decrease Error Bound if image appears spotty outside shadow areas Increase Min LOD parameter if areas with volumetric shadows appear spotty Set high Error Bound and small Min LOD for fast previews Use Inverse Square Law for your light s Fall Off together with auto exposure for best results 17 Chapter 5 Rendering Effects 5 1 Effects Tab Like the Materials and Lights tabs the effects tab is divided into two panes for archives and palette This tab is where you set up different rendering effects Each archive is divided into upto three sub folders of different types of effect Backgrounds Foregrounds Render Styles Presenter EE Fhotorealistic Eg background ul LJ Clouds ay Graduated oar Image Heavy Fog Mosaic 5caled Image Tiled Image m No Background 9 4 Plain 89 2 Ray Cube lg Foreground EC Fog To set an effect for the render you simply drag a style from the archive to the palette You can only have one of each type of effect at once in the palette that is one background one foreground and one rendering style Note A complete reference manual for all types of foregrounds backgrounds and rendering styles is in cluded with the NavisWorks API The NavisWorks API is included with NavisWorks Roamer as a custom install 18 Chapter 5 Rendering Effects 5 2 Background Effects Background effects obvious
8. you to apply a material to named Roamer materials NavisWorks Roamer materials are not the same as NavisWorks Presenter materials Roamer materials merely 27 Chapter 7 Presenter Rules refers to the color and transparency of the item as it comes through from the original CAD file whereas Presenter materials are those materials applied using the Presenter plugin or are more complex materials such as bitmaps converted from the original CAD file If a Presenter material has the same name as a Roamer material in the model for example Auto CAD Oolor Index 7 then all items with this original Roamer material name in the scene receive this Presenter material from the palette when you check the rule Materials by name and click Apply Rules 3 Selection sets by name enables you to apply a material to selection sets See the section called Se lection and Search Sets in the chapter called Selecting Items in the Roamer book for more infor mation on setting up selection sets If a material has the same name as a selection set in the model then all items in this selection set re ceive this material from the palette when you check the rule Selection sets by name and click Ap ply Rules The three options on the right hand side of the dialog affect how these rules are applied to the scene Setting Presenter Rules Options Check Override current mappings if you want to override any existing mappings from Presenter materials to ite
9. you ve made in one scene into other scenes Click Edit or simply double click on a material to open the material editor dialog allowing you to edit its parameters See Section 3 5 for more information on this 3 5 Editing Presenter Materials Installed archive materials cannot be edited but you can edit materials in the scene s palette which will be saved with the NavisWorks model in an nwd or nwf file To edit a material double click on it in the palette or right click on it and choose Edit from the context menu The material editor dialog will appear which will be different for different types of material You can t add or remove parameters on a material merely edit those existing so it is important to use the right type of material template for the material you want to edit The dialog for the Breeze block procedu ral texture is shown below and this will be used as an example of how to edit a material Chapter 3 Presenter Materials Material Editor Breeze block a c al Material Tete Material Scale Scale Brick width zen 0 79 Brick Height Ft 0 79 Brick Color 1 Brick Color 2 LI Martar Color s Note If the user profile see the section called Profiles in the chapter called Interface in the Roamer book for more information on this is set to Developer there are more tabs and parameters to edit in this dialog In particular
10. 1 Soft Shadows NavisWorks Presenter includes shadows generated from pre calculated shadow maps for each shadow casting light source The use of shadow maps enables rapid rendering of shadows with soft or graduated edges The shadow resolution can be controlled to balance performance and image quality Soft shadows are only suitable for use with small models and are disabled by default For large models the generation of the shadow maps can use excessive amounts of time and memory Soft shadows gen 15 Chapter 4 Presenter Lights erated for large models are often too vague and dispersed without using an excessively high resolution which uses even more memory and time 4 5 2 Physically Accurate Lights By default Presenter uses lights with unitless or empirical intensities These are physically meaningless and are just chosen to give a visually pleasing result Presenter can also use physically accurate intensi ties These are defined in real world units such as Candela Lumen or Lux However once we start using lights with real world intensities we start to produce images with a real world variation in luminance val ues By default Presenter uses lights whose intensity remains constant as you move further from the light In the real world intensity is reduced proportional to the inverse square of the distance from the light Chang ing a light s Fall Off parameter to Inverse Square Law will more accurately model a light s fall
11. If the sun s mode includes Intensity Presenter will also calculate an accurate intensity for the sun based on position time of year and atmospheric condi tions 3 Sky simulates the illumination from the sky but not the direct contribution due to the sun itself The orientation of your model is defined by north and up directions The position of the sun is specified as sun altitude and sun azimuth Whilst the direct contribution of the sun is not included its location will determine the appearance of the sky hemisphere If the intensity is left at 0 Presenter will calcu late an accurate intensity for you based on the sun s position 4 A Goniometric light is one which can emit widely varying amounts of light energy in different direc tions One goniometric source could behave exactly like a point light another could behave exactly like a spot light and a third could look nothing like either of those A goniometric light gets its intensity distribution function how much light goes in any one direction from an industry standard file Pre senter supports CIE cie IESNA ies CIBSE cib and ILUMDAT Idt files Note A complete reference manual for all light types is included with the NavisWorks API The Navis Works API is included with NavisWorks Roamer as a custom install Each light type has its own parameters and the editor for a Point Light is shown here Light Editor Point x Intensity Color
12. Location Shadows Shadow Resolution Color Temperature Intensity Units Shadow Type E Point distant spot and projector lights have a Location parameter Distant and spot lights additionally have a To parameter You can type in x y and z coordinates for these or alternatively use the Pick button to interactively pick a point in the scene where the light and or target is located The light is repre sented by a 3D wireframe sun icon in the scene and the target by a wireframe sphere The currently se lected light is drawn in the selection color see the section called Selection Options in chapter called Se 14 Chapter 4 Presenter Lights lecting Items in the Roamer book for more information on this Note NavisWorks does not allow you to pick a point in empty space so you must pick a point on the model When the user profile see the section called Profiles in the chapter called Interface in the Roamer book for more information on this is set to Developer the dialog will include further more obscure parameters and allow you to change the type of a light Editing parameters in the dialog will interactively alter the scene with those changes At any time click on the Apply button to apply the parameter edits to the light in the scene You can save an edited light for use in other scenes by simply dragging it onto the User archive Click OK to keep the changes made or Cancel to d
13. NavisWorks Presenter User Manual NavisWorks Presenter User Manual Table of Contents 1 Overview of Presenter xiii e een d let desde nd ee de e dA oe Aes a Ue vd paren 2 RenderingiSceres a tinte tentes tt at eter ae beet b odore dee Ense a RUE 3 Presenter Materials m ne edet eod te bea i M det tua nen he hen tae 34 Materials Tab e eet ete eem Ee ete tt ue 5 3 2 Applying Presenter Materials eene nennen 5 3 3 Removing Presenter Materials eene nnne 6 34 Managing Materlals tiit eter t EE RE nr REN ESL EX RS AE SERRE RO dapes 7 3 5 Editing Presenter Materials mene mme nnne nnne 8 3 6 Advanced Materlals 2 iei epe iet emt e eee he ur in een 10 4 Presenter Eo nj sos erae oce i rath ari ease coca cista 12 4 2 Managing Lights ee ae cde eene dense nn oa DB d ede ieee ees 12 4 3 Editing edes tes toner 13 4 4 Predefined Light Studios 15 Advanced Lighting ee De ne 15 45 1 Soft ShladOWS deer ere t er e RE E HG niea ea RESTE eg be EEE 15 4 5 2 Physically Accurate Lights esses menn 16 4 5 3 Volumetric Lights ER HE RE ge eer 16 5 Rendering Ettects rien ad ane veo ed ine mv Oque Lid ug he du Led aee Y
14. also be prompted to save any modified archives when you close NavisWorks Additional Archives Archives can be added within each of the Materials Lights and Effects tabs The principles are the same for each Adding archives To download an archive from the LightWorks web site right click on any archive and choose Down load Archive from the context menu Then follow the instructions given To import a downloaded archive into Presenter right click on any archive and choose Import Archive from the context menu The normal Windows Open File dialog will appear for you to browse to and choose the lwa file to import Chapter 2 Rendering Scenes While the OpenGL rendering in the main navigation window is adequate for interactive walkthrough and previewing renders you will no doubt want to render your scenes and animations with full photorealistic rendering at some point You can render directly into the main window by simply clicking on the Render button at the bottom of the Presenter control bar at any time The following procedure describes how to do this as well as how to render your viewpoints and animations to files Setting up and rendering a scene Drag and drop materials onto items in the model You can use the pre defined materials or create your own from the templates in the Materials tab see Section 3 1 for more details on how to do this 2 Use the Texture Space tab to more accurately map materials onto items
15. bnail of the material as it will appear when rendered Presenter E Xx Materials Lights Effects Texture Space Rules Bricks Eur Ceramics Ceramic Breeze Cast Ceramic M Earthenware black aluminium Me Porcelain ID Stoneware ar Terracotta Enamel Glass Pebbles Metals Natural Paper The following sections will describe how to manage and edit materials for application onto items in the scene 3 2 Applying Presenter Materials Materials can be applied to items in the scene by dragging and dropping the material onto anitem in the scene anitem in the selection tree e aselection set If you drag the material from an archive then it will appear in the palette where it can be edited and saved with the scene if necessary Chapter 3 Presenter Materials Presenter uses Roamer s selection resolution to decide which items to apply the material to when drag ging from an archive or palette onto the main view When hovering over any item in the main view the proposed selection will turn the selection color blue by default When you drop the material onto the cur rent selection it will be applied to all the items selected If you drop the material onto an item that is not currently selected it will be applied to just that item You can also apply materials to items by selecting the items in the NavisWorks selection tree or scene and then right clicking on the mater
16. ed Lud du el a Detects Tab eon o ete ra nee D ene a ete Ua ter eode Endet Lo ber toes 18 5 2 BackgroundiEITects eo bte dep eee elt ade 19 5 3 Foreground Effects aiio ee a edic Eo ER de Se ER DO cR RES HORREA QUE qd 19 5 4 Rendering Styles eret breue Ee REA XE Lega b dod 20 5 5 Predefined Rendering Styles nnns nnne 21 6 Texture Space e dece eee Eee e santa cick ru t bte e RU x ue a e ese EE ERES T PresenterBhules 2 2 c set EIC vob adno cete dare cavae Led deve en eis Index tee ee Re e Lt RD e s Chapter 1 Overview of Presenter The Presenter plugin enables you to set up materials and lights in your scene and render it with more re alism and effects Like all plugins Presenter is a dockable tabbed control bar accessed through the Tools menu Hint hold down the Control key to prevent the control bar from docking if necessary From the Presenter control bar you can edit pre defined materials and apply them to items in the scene add lights to the scene and set up rules for applying the materials to other files in the same project set up with the same parameters You can define and apply your materials and lights to a model and save the settings into a NavisWorks nwf file so that as the model is updated the materials and lights remain the same Ma terials can also be brought through from CAD applications via the 3DS and dgn fi
17. from an algorithm or bitmap generated from an image there is an extra tab called Texture The Material tab contains simple parameters that affect the material s color scale shininess and so on In the case of the breeze block there are parameters for the overall scale of the material as well as a block s width and height the blocks color and mortar color its roughness and reflectivity On a bitmap texture you would also define where the image is that becomes the texture map in the Image File Name text box and Browse button On a glassy material other factors would affect the trans parency and refraction properties of the glass Some of these factors will not be apparent in the inter active OpenGL window and will have to be rendered with the Render button to be seen The Texture tab contains parameters that specifically affect a texture material s texture mapping properties such as its rotation offset origin and S and T sometimes called U and V scales When using the Main Window Preview texture changes can be made instantly allowing interactive positioning of materials on an object At any time click on the Apply button to apply the parameter edits to the material in the scene Click OK to keep the changes made or Cancel to discard any changes made since the last time you clicked Apply at least 3 6 Advanced Materials Internally a material is defined by four shaders from different classes Color Transparency Reflecta
18. ial in the palette and selecting Apply to selected items from the con text menu Rules can also be used to apply materials to items based on their layer or color names See Chapter 7 for more information on this Applying a material to items Select the items in the main navigation window or by using the selection tree 2 Choose your material from an archive or palette right click on this material and choose Apply to se lected items from the context menu to assign the material to those items selected Note that the ma terial will only be applied to those items and not to every instance of the item if it is a multiply in stanced block or cell To assign the material to all instances of a multiply instanced block or cell in the scene instead choose Apply to all instances of selection from the context menu 3 Alternatively you can simply drag and drop a material from an archive or palette onto items in the se lection tree or main navigation window to assign those materials to the items Note that the selection resolution determines which items will receive the materials See the section called Selection Reso lution in the chapter called Selecting in the Roamer book for more information on selection resolu tion 3 3 Removing Presenter Materials You can remove materials assigned to items either from the material or from the item Removing a material from items Right click on the item in the main navigation window or the se
19. ion allows a user defined texture space to be applied and will be available if the item had a texture space applied to it in the original CAD application Each texture space option applies some imaginary bounding geometry around the item and shrink wraps the texture as best it can to the geometry underneath this bounding geometry Presenter Render Clear If you ve applied a texture to an item Presenter will attempt to work out the best fit from the four texture spaces available If this isn t what you intended then you can then edit this texture space Editing Texture Space Select the item and go to the Texture Space tab in the Presenter dialog to choose another or 23 Chapter 6 Texture Space Right click on an item which has a texture applied to it and select a new texture space from the Presenter Texture Space context menu You can fine tune an item s texture space further by clicking on Edit in the Texture Space Presen ter dialog tab The relevant texture space edit dialog will appear Either the plane texture space editor Texture Space Editor Scale 1 Aspect Ratio 1 Origin Fick TOT sa 305 Normal Pick 3387386005 1588876018 Up Fick 0 1 53557e 013 1 me mw E Or the cylindrical texture space editor 24 Chapter 6 Texture Space Texture Space Editor E B xj Scale Around Axis Camp 0 78595 Scale Alo
20. iscard any changes made since the last time you clicked Apply at least 4 4 Predefined Light Studios The Photorealistic archive includes many predefined light studios The Exterior Accurate section includes combinations of sun and sky shaders defined for different cities around the world All are setup for 12 noon local time on the 24th of April 2004 They are divided into Physical Intensity and Simple Intensity subsections The Physical Intensity versions use physically accurate intensities and will need to be used with the auto exposure option The Simple In tensity versions are not physically accurate but will give adequate results without needing to enable auto exposure The Exterior Fake section includes light studios that give similar visual effects to sun and sky shaders but are simpler to render The Interior section includes light studios suitable for lighting simple building interiors single rooms The Object section includes light studios suitable for lighting complete objects These are a good starting point if you want something visually attractive without the effort of accurately modelling light positions The Projector section includes a few examples of light studios that include projector lights 4 5 Advanced Lighting NavisWorks Presenter is capable of many advanced lighting effects including soft shadows physically accurate lighting simulation and volumetric lighting effects 4 5
21. le formats or by ex porting from 3D Studio Viz or Max see the chapter called Converting Files in the Roamer book for more details on this While Presenter can be used for photorealistic renderings it can also be used for OpenGL interactive ren dering and once you ve set up the scene with Presenter you can view the materials and lights in Roamer There are special rendering styles to interactively preview the Presenter materials and lights called Full Lights and Full Render on the Rendering Style toolbar qx e XI jm c e The Materials Lights and Effects tabs are divided into two panes The left hand pane contains the archives and the right hand pane contains the scene s palette which defines what materials lights and ef fects are used in the scene Archives are shown in a tree structure and are defined in the LightWorks Archive lwa format There are three pre defined archives that are installed with Presenter The Interactive archive contains materials lights and effects which can be seen during interactive navigation in NavisWorks Roamer and can be fully rendered with OpenGL Of course they will look better when rendered photorealistically Materials lights and effects in the Photorealistic archive cannot be fully reproduced using OpenGL and therefore will not be seen properly in interactive mode or until a full photorealistic render is done Any materials lights and effects from any archive can be used as a te
22. lection tree and choose Presenter Remove Material from the context menu This item on the menu will only be available if the item right clicked on has a material assigned to it at that selection resolution in the tree see the section on Inheritance below Alternatively right click on the material in the palette that you want to remove from items in the scene From the context menu choose Remove from all items to remove all assignments of the material Chapter 3 Presenter Materials from all items in the scene 4 If you have items selected in the main navigation window or selection tree then you can choose choose Remove from selected items from the context menu to remove that material from only those items you have selected in the scene Inheritance Layers can have colors just as geometry can If a layer has a material all its children in the selection tree inherit this material until one of the children is assigned its own material at which point all its children in the selection tree inherit this material and so on If you drag and drop materials onto layers this works fine because only the layer picks up the material and although its children inherit the material they do not have it explicitly assigned to them Therefore right clicking on such a child will not allow you to remove the material because one was not ex plicitly assigned in the first place However if you use a rule to assign a material to a certain co
23. lor then all objects in the scene will get this material explicitly assigned to them including parent layers and child objects If with a selection resolu tion of something like Geometry which is more specific than a resolution of Layer you right click on a child object and choose Remove Materials from the context menu then the material will be removed from the child object but not from the parent layer and there won t be any apparent difference 3 4 Managing Materials The palette is where you edit and manage your materials for your scene Materials are taken from the archives into the palette where they are edited You can then save the palette into an nwp file for use in other scenes too Managing Palette Materials Right click on a material in the right hand pane of the Materials tab the palette 2 Click Delete to delete the material from the palette This will also remove the material from all items in the scene 3 Click Copy to copy the material to the clipboard Right click on an empty space in the palette and choose Paste to paste a copy of the material with a the same name suffixed with the next number in the list This process is useful if you want to test small tweaks to a material 4 Click Rename to rename the material You can also select the material and press F2 to rename it 5 Click Regenerate Image to regenerate the thumbnail of the material in the palette with the current at tributes 6 Chapter 3 P
24. ly affect the background of the image when rendered and include plain colors graduated colors procedural clouds and bitmap images tiled or scaled To set up a background for your render simply drag your chosen background onto the palette on the right hand side of the tab Most backgrounds can be rendered interactively in OpenGL so you have a good preview of how the background will be fully rendered To edit your chosen background effect simply double click on the effect in the palette The Background Editor dialog will appear Each editor will be different for each type of background The Scaled Image ed itor is shown here Background Editor Scaled Image f File Marne Rotation Keep Aspect Keep Texture Softness 1 E Note When the user profile see the section called Profiles in the chapter called Interface in the Roamer book for more information on this is set to Developer the dialog will include further more obscure parameters and allow you to change the type of background Editing parameters in the dialog will interactively alter the scene with those changes At any time click on the Apply button to apply the parameter edits to the scene You can save an edited background for use in other scenes by simply dragging it onto the User Back grounds archive Click OK to keep the changes made or Cancel to discard any changes made since the last time you clicked Apply
25. mplate starter for your own defi nitions but the Templates archive contains instances of each type of material light and effect giving you quicker access Additional archives can be downloaded from hitp www lightworks user com Although materials lights and effects cannot be edited in archives once dragged into the scene s palette they can be edited and saved with the scene in a NavisWorks nwd or nwf file You can save your own edits to materials into an nwp file see Section 3 4 for more information on how to do this Also there is a User archive which allows you to save your own edited materials lights and ef fects for use in other scenes The User Archive The User archive is accessible from each of the Materials Lights and Effects tabs The principles are the same for each Managing the user archive Chapter 1 Overview of Presenter To save a material light or effect to the user archive for use in other scenes simply drag that item onto the User archive 2 To create a new sub folder in the User archive right click on the archive and choose New Direc tory from the context menu You can rename this new folder by right clicking on it and choosing Rename from that context menu You can make as many nested sub folders as you wish in the User archive 3 To save the User archive to disk right click on it and choose Save Archives from the context menu This will save any modified archives You will
26. ms in the selection tree 2 Check Apply to current selection if you want to apply this rule only to the currently selected items in the scene Be aware that this is the default setting so if your rule seems not to have worked check that you don t have this option checked with nothing selected in the scene 3 Check Apply to all instances if you want to apply this rule to all instances of any multiply instanced item affected by the rule 28 Index background effects 19 F foreground effects 19 L light studios 15 predefined 15 lights 12 12 13 15 16 16 advanced 15 editing 13 managing 12 physically accurate 16 volumetric 16 materials 5 5 6 7 8 10 advanced 10 applying 5 editing 8 managing 7 removing 6 P Presenter 1 5 12 27 lights 12 materials 5 overview 1 rules 27 R rendering effects 18 rendering scenes 3 rendering styles 20 21 predefined 21 rules Presenter 27 S shadows 15 soft 15 T texture space 23 29
27. nce and Displacement Each class of shader controls a different aspect of a material s behaviour There are many types of shader in each class each type being defined by its own set of parameters Acolor shader is used to define the color of a surface at any point in space It may be as simple as a plain color which specifies all parts of the surface to have a uniform color or it may define complex surface patterns such as marble or wood Every material must have a color shader 10 Chapter 3 Presenter Materials A transparency shader is used to define how transparent or opaque a surface is and thus how much light is able to pass through it Transparency shaders range from a simple uniform transparency to more complex regular or irregular eroded patterns that would be more difficult to represent using mod elling techniques A material without a transparency shader is completely opaque The behaviour of a surface in the presence light is represented by a reflectance shader which defines how much light is reflected by the surface towards the viewer Shaders of this class may be thought of as defining a surface s finish and are used to model properties such as matte metal and plastic Small surface perturbations can be supported by means of displacement shaders Typically a dis placement shader will give an otherwise smooth surface an irregular or indented appearance Dis placement shaders are used to represent features that w
28. ng Axis 1 Center Point Fick 0451004 zea a0 Axis Direction Pick Origin Fick 0 913994 3 634 2 676 x zz Or the spherical texture space editor Texture Space Editor Latitude Scale am 0 269755 Longitude Scale 1 539509 Lenter Point Fick 2 451003 3629 au Origin Fick Axis Direction Pick cnet E Edit each of the inidividual parameters and click Apply to see the results of the edit Clicking on Pick allows you to interactively pick a point in the model rather than individually typing in x y and z co 25 Chapter 6 Texture Space ordinates Click on OK to apply the edits and return to NavisWorks or click on Cancel to return to NavisWorks without applying the edits any clicks on Apply will have already applied the edits however Once edited you can always reset a texture space to the NavisWorks defined version by clicking on the Reset button Click on Ortho if you want NavisWorks to align the texture space with the nearest axis Click on Fit if you want NavisWorks to fit a single repeat of the texture to the item 26 Chapter 7 Presenter Rules The Rules tab of the Presenter control bar allows you to apply materials to models according to certain user defined criteria rather than by dragging and dropping onto individual layers groups or components For example all layers that are floors can be assigned a
29. ould be difficult impossible or inefficient if conventional modelling techniques were used For example rough metal castings and the regular in dentations produced by pressed sheet metal can be simulated Normally the material editor displays a selection of the most important parameters from all shaders within the material tab If the user profile see the section called Profiles in the chapter called Interface in the Roamer book for more information on this is set to Developer then all four shaders can be edited and changed individually Some shaders are described as wrapped These define a flat two dimensional material like wall paper Wrapped materials need a texture space shader to define how they should be applied wrapped around to a three dimensional object that include a wrapped shader can also include a texture space shader A special type of texture space shader called a layout shader can be used to transform rotate stretch off set the two dimensional material before it is applied to the three dimensional object A texture space shader defines how the two dimensional material In Presenter materials that include a wrapped shader also have a layout texture space shader associated with them Normal texture space shaders are associated with objects Note A complete reference manual for all shaders is included with the NavisWorks API The Navis Works API is included with NavisWorks Roamer as a custom install 11
30. resenter Materials Click Select all instances to select the items in the scene which have this particular material as signed to them Depending on whether items are selected in the scene and whether the material has been assigned to any items there will also be a couple of Apply and Remove items on the context menu See Sec tion 3 2 and Section 3 3 for more details on these Click Clear Palette to delete all the materials from the palette and also from all items in the scene Click Load Palette to load a previously saved palette of materials into the current scene This will delete any materials currently in the palette The standard File Open dialog will appear allowing you to browse to a nwp file Click Append Palette to load a palette from an nwp file while keeping all the existing materials in the current palette Any materials that are duplicated will be renamed with the nwp file as an exten sion Click Merge Palette to merge a palette from an nwp file into the current scene This is like append ing but instead of adding and renaming any duplicate materials merging will overwrite existing mate rials of the same name Click Save Palette As to save your current palette of materials into a NavisWorks Palette nwp file If you save the current scene using the usual File Save method into an nwf or nwd file the palette will be saved too but the independent nwp file is useful if you want to transfer materials
31. rinter then the Browse button and box will be grayed out and you will get the standard Windows print dialog to set up the printer and options on clicking OK If you re rendering to a QuickTime Object Movie on clicking OK you will get an options dialog to set the pan and tilt settings for the movie d See the section called Controlling the size of an image in the chapter called File Management in the Roamer book for details on how to set the size of the rendered file The only difference be tween those options and the size options on this dialog is that you have a Use Printer Page op tion here which will size the image to the page setup size of the default printer If you choose Use View as the Size of the image file then NavisWorks will save any existing render from the main window without having to render again from scratch You can save a rendered animation from the File Export Rendered Avi menu too This will open the export animation dialog as explained in the section called Exporting to an avi in the chapter called File Management in the Roamer book Chapter 3 Presenter Materials 3 1 Materials Tab Like the Lights and Effects tabs the materials tab is divided into two panes The left hand pane describes the pre defined archives of materials that are installed and the right hand pane shows the current palette of materials that have been defined and are being used in the scene The palette also shows a small thum
32. s 3 Point lights have a location but shine in all directions They also have an intensity and color and ad ditionally can cast shadows only available in a full photorealistic render 4 Distant lights are directional and so have a location and target However the location and target merely set up an axis down which the light shines as these light types are infinitely far away and their beams are parallel As well as intensity and color parameters they can also cast shadows in a photorealistic render 5 Spot lights are also directional and therefore have a location and target as well as intensity color and shadow parameters In addition they also have parameters for affecting the light s fall off and cone angle as these light types are not infinitely far away so do spread their light over a cone and the intensity does diminish away from the light There are an additional four types of light visible only in photorealistic renders 1 Projector lights are used to project an image onto surfaces You can define the file of the image to be projected 13 Chapter 4 Presenter Lights 2 Sun simulates the sun s light The orientation of your model is defined by north and up directions The position of the sun is specified as azimuth and altitude If the sun s mode includes Position you can input your location on earth the time using GMT time zone and date and Presenter will calcu late the sun s azimuth and altitude for you
33. there are Reflectance Transparency and Displacement tabs and at the top of each tab is a Shader type which allows you to completely change the type of material and all other parameters Editing the breeze block texture The three buttons at the top determine what sort of material preview you get Chapter 3 Presenter Materials a to get a software generated photorealistic preview of the material on the standard ball against checkered background which is not interactive but will show how the material will look when rendered photorealistically e Click on the Active Preview button Bi to get an OpenGL interactive preview of the material on the standard ball against checkered background This is updated interactively while you change the parameters and will resemble the quality of material shown in NavisWorks Roamer during navigation but will not be as high a quality as the photorealistic render Click on the Main Window Preview button to close the preview window in the material edi tor and instead preview the material on the item in the scene in Roamer s main navigation win dow This is updated interactively while you change the parameters and will be exactly the mate rial shown in NavisWorks Roamer during navigation but will not be as high a quality as the photo realistic render For a simple material there is only a single Material tab on the material editor whereas for a texture material whether procedural generated
34. way that the scene is rendered when a full photorealistic render is done by clicking on the Render button None of these effects are available as an interactive preview To set up a rendering style simply drag your chosen style onto the palette on the right hand side of the tab To edit your chosen rendering style simply double click on the style in the palette The Render Editor di 20 Chapter 5 Rendering Effects alog will appear Each editor will be different for each type of rendering style The Mosaic editor is shown here Render Editor Mosaic E 4 x Gap width E Gap Color Tile Size Ti Tile Shape E Gap Transparency w Tile Background Ive Anti aliasing Iv Note When the user profile see the section called Profiles in the chapter called Interface in the Roamer book for more information on this is set to Developer the dialog will include further more obscure parameters and allow you to change the type of render style At any time click on the Apply button to apply the parameter edits to the scene You can save an edited rendering style for use in other scenes by simply dragging it onto the User Ren dering Styles archive Click OK to keep the changes made or Cancel to discard any changes made since the last time you clicked Apply at least 5 5 Predefined Rendering Styles The Photorealistic archive includes many predefined rendering styles The Photorealistic Comple
35. with the luminance values adjusted to match the behaviour of the human eye In general when using physically accurate lights Auto Exposure should be on 4 5 3 Volumetric Lights Volumetric lighting allows effects such as the scattering of light by fog or smoke in a scene Enable the Scattering check box on each light A Scattering Medium foreground effect must also be in use see Section 5 3 for more information on how to setup foreground effects You may need to adjust the Medium Density and Medium Ambient parameters of the Scattering Medium foreground effect to suit your model If no volumetric effects are visible the Medium Density is too low If the rendered image is entirely white the Medium Density is too high The default medium is plain white Optionally a density shader may be set to any solid not wrapped color shader to create the effect of a non uniform inhomogeneous medium Examples of shaders that can be used are Blue Marble and Solid Clouds A shader that has been designed explicitly for this pur pose is the Turbulent shader The key points when using volumetric lighting are Remember to turn the Scattering parameter of light sources on if you want to see their volumetric ef fects 16 Chapter 4 Presenter Lights Use Medium Density and Medium Colour to define brightness and colour of the lit medium Use a solid color shader set as Density Shader for simulation of density
36. x Models section includes photorealistic rendering styles suitable for use with complex models These rendering styles are fastest and use least memory where large parts of the model are hidden in any particular view The Photorealistic Simple Models section includes photorealistic rendering styles suitable for use with simple models These rendering styles are fastest and use least memory where most of the model is visible in any particualr view The Simple Shaded section includes some simple shaded render styles where advanced features Such as textures and transparency are not required 21 Chapter 5 Rendering Effects The Sketch section includes a large range of rendering styles that simulate hand drawing and other non photorealistic styles These styles use a mixture of shaded vector and image based rendering techniques They are generally best suited to small models and small output images The Vector section includes wire frame and hidden line rendering styles 22 Chapter 6 Texture Space Texture space describes the way in which a texture is applied to an item For example applying a cylindri cal texture space to a pipe will cause textures on the pipe to be rendered more naturally An item s texture space may have been assigned from the original CAD application and brought through from the native CAD file or set up within Presenter with the options of Box Plane Cylinder or Sphere The Explicit op t

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