Introduction. Modeling an iPhone 4 with all the details sems todo be a more challenging tasque for beginners than it is actually in reality. The secret is todo break down all the semingly bigger problems into smaller more manageable elements. Then it Will become quite evident how easily this model can be approached, the key todo success here is todo start with very simple shapes and make use of the modifiers such as mirror, Solidify, screw, bevel, and bolean todo rapidly develop shapes and proportions and then todo fine tune details. This is a more parametric modeling approach borrowed from standard CAD enginering applications, step by step design decisions are made interactively, trying todo eliminate time consuming restarts or Mesh adjustments by hand, saving time and maximising design decisions, Blender 2.5 is a vast improvement over 2.49. Besides the already mentioned new modificadores, it a los allows you todo now place Blue Prints into respective views, which eliminates the ned todo work in múltiple view ports. By just switching between the views Blender now displays the predefined blueprint. A very simple but greatly useful característica. In addition the new unit system and measuring add-ons a los greatly help in working perfectly in scale, this process of using modifiers first and at the end, making the Mesh into a tangible form ready for texturing is what this tutorial Will focus on, in regards todo detail level, it is a los very important todo be clear about the modeling goals, thus Gathering as much reference información as posible is very important. One neds todo know what todo model and those models which very often impress people are those which a los pay attention todo the object details.
Step 1: scene set-up.
Before we start modeling, as a first step it is important todo set-up the scene, the units utiliced in these Blue Prints are in metric. In Blender 2.5 the units panel is found inside the world tab. It allows the user todo select between common Blender units, the metric or imperial system.
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As a second step, it is required todo place the correct blueprints parts into the respective views, the background image tab is placed inside the properties panel and can be opened with [n] while being inside the 3d view or using the main menú 3d view>>view>>properties.
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The panel itself is quite self explanatory. It starts with the view you would like the image todo visible in, it is a los posible todo adjust the opacity as well as size and position, todo adjust the scale of the image, a Cube with the right proportions can be used as an overlay, th rouge the size and x/y sliders the image can then be scaled and positioned correctly. After this step the Cube can be discarded as it only functioned as a scale reference.
Another nice addition is that Blender 2.5 now displays the current view name as well as the view scaled inside the upper left corner of the 3d view port.
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Step 2: blocking out basic proportions.
The easiest bien is todo start with a square perfectly placed at the center of the iPhone front view with the correct dimensions. Add a circle and move it todo the lower left corner.
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The Snap todo Edge function can assist in positioning the circle todo correctly lay on the lower left Edge of the rectangle. Selecting the circle and pressing [g] for Grab and then [z] for a vertical movement restriction and releasing the mouse when the circle Snaps todo the lower Edge of the square as shown on the left of the image. With the 3d cursor positioned at the lower left corner of the rectangle it can then be used todo scale the circle todo the right size when the pivot point is set todo the 3d cursor as shown in the right of the image.
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The following two images show how the initial square is being subdivided, the circle being joined todo it and all not neded geometry being removed. The end result Will be a perfecto quarter of the iPhone main body.
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At this point this profile can be extruded into, the required depth and by making use of the mirror and Solidify modifier the outer border of the iPhone body is built. The mirror modifier can be used todo replicate the quarter Arc over the objects center as visible in the screenshot. The Solidify modifiercreates a thickness todo the resulting surface, because of the surface normals facing inside the offset value of 1 extrudes the depth towards the center of the object, attention was paid todo provide geometry points for the future display panel Mesh at this stage by using a thickness value of -3.4cm, this object can be duplicated and scaled along the depth axis todo build the base Mesh for constructing the Rim. The Solidify modifier Will again probé very useful in this situation. By changing the offset todo -0.5, the modifier offsets the starting surface backwards, starting inside the iPhone body, and then extrudes it, by a thickness of 8mm outwards. The reason for this is, because currently Blender 2.5 does not have the weight Edge característica included and thus the.
Bevel modifier would a los chamfer the Edge of the Rim which líes on the iPhone body.
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To finish the basic iPhone body, it can be duplicated and moved todo another layer. The mirror and Solidify modifiers are applied and missing Faces are built into the Mesh todo produce a water tight body. As the screenshot shows, the Faces for the future.
Display panel for texturing is built in.
Step 3: interactive detailing.
At this stage, detail meshes can be added interactively with the use of the bolean modifier, this approach has a certain advantage compared todo hand modeling geometry such as an opening for a button Insert. Th rouge using the bolean modifier, the designer can place the geometry which should be subtracted and the modifier Will Perform this tasks automátically. Rather then redoing or adjusting the Mesh by hand, there is more time todo focus on fine tunning the position, scale, rotation, and geometry of the bolean Mesh, for the bolean modifier and others todo work as desired certain restrictions have todo be paid attention todo. In general the first rule is the order of tasks being performed. The following image shows on the far right side the advisable order of modifiers for the Rim structure. At first is the mirror modifier which produces a full Thin surface, followed by the.
Solidify modifier which creates the thickness, if the mirror modifier would be second, it would a los mirror inner Faces created by the.
Solidify modifier and those bad geometry elements are often the reason why the.
Bolean modifier would produce bad results, it is important todo add the bevel modifier at this stage before we start utilizing the bolean modifier, because only the outer Edge of the Rim should be beveled. If the bevel modifier was last it would a los be applied todo all Edges resulting from the bolean task. Alos all bolean meshes have Smooth Shading turned on as well as the Rim. With the edgesplit modifier at the end of the modifier list, each object has Smooth rounded surfaces and creased Sharp Edges automátically in 3d view and at render time.
The orange elements are those being utiliced for the bolean operation. As a second rule, it is very important here todo have clean and simple Mesh models without any duplicated Faces or other issues, as they Will produce problems for the bolean modifier as well, water tight volumes are not neded and as can be sen some objects are simple surfaces, however their surface normal defines the direction the bolean operación works - Thus is it important todo make sure that they all uniformly face outside when the object is being used as a bolean diference (which subtracts geometry). The following composition explains this concept.
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The concept of using the modifiers for Mesh modeling líes in the interactive ability todo change position and a los shape and thus rapidly fine tune the design. The following screenshot displays a quarter model of.
Bolean object. Starting with the left, a small Mesh cross aids as a corner position for the 3d cursor which can be snapped todo the cross th rouge the [shift +s] Snap menú and selecting the cursor todo selection option. The right image shows the Edge geometry being scaled with using the 3d cursor as the pivot point and making use of the z axis exclusión.
[s + shift + z] this method currently works very well when corner rounding might change during the design process.
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This set of bolean modifiers for the Rim model can already Slow down the screen refresh. Each time one object is modified.
Blender Will recalculate the complete modifier chain which explains the increasingly longer computation time. T o speed up editing it is advisable todo only have those modifiers visible which are being worked on by clicking onto eye icon. During render time the outcome Will still be visible.
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The blue elements on the left are representing the detail Mesh objects, such as buttons, sliders, Camera, and speakers. They are built based on the very same basic bolean objects keping the Mesh density idéntical todo guarante a tight fit and prevent open cracks, in the case where a button has todo be smaller than the bolean, the profile has todo be scaled down. The Solidify modifier cannot produce just an offset surface as Blender does not ofer a scale modifier. Alos because blender2.5 does not yet support Edge weighting which prevents selective Edge beveling th rouge the modifier, a diferent approach was used todo evenly build all buttons with nicely rounded Edges. The new screw modifier is a great help todo quickly produce lathe / Revolve like objects by only using a base profile, the following screenshot displays the diferent application áreas.
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Th rouge duplication and slight modification diferent buttons with altered size and proportions can be generated quickly. The.
Screw modifier allows you todo specify the amount of rotation which is 360 Degrees for the two right objects and 180 Degrees for the left one. Selecting the calculate chek box a los makes sure that no normals are flipped in the resulting Mesh, another very useful tool in Blender 2.5 is bartius crouchs Loft and bridge script. Not all Blender builds include it yet and it can be installed th rouge the install add-on function in the user preferencias. The script can be downloaded from the posted enlace in the resources section.
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The previous image shows two Edges being selected. T o quickly Access the bridge script [Control + f] can be used, which opens the Faces dialog. The great thing about this script is that it does not only do a basic linear fill between two Edges, but can interpolate between them, which means that the curvature can be controlled and Smooth bevels can easily be constructed, the cubic interpolation as shown in the middle image has todo be selected and the strength value defines how far the created bridge Mesh Will blend into the start and end geometry. As sho, the far right image presents a much smoother flow from the gray Faces into the orange rounded Mesh. This is mainly a function found in Nurbs application and it is a great pleasure todo se this in Blender now.
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Final model: preparation for rendering.
For rendering and scene design it is advisable todo bake all geometry generating modifiers such as bolean, screw, mirror, Solidify into touchable Mesh. The are Many reasons for this. The bolean modifier can Slow down the screen refresh. This modifier in 2.5 a los ignores the material of the subtraction object, the bolean result can a los show some surface normal issues as visible in the left quik rendering around the home button. In addition, all objects have todo be moved when repositioning the iPhone including all bolean meshes. This can quickly generate a lot of unneded overhead.
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Screw, Solidify, and mirror modifiers a los do not really allow UV texturing of those meshes since it is imposible todo Unwrap them. Those meshes are generated on the fly, keping a back-up geometry set on another layer might in general be a god idea, or having one blend file for the modeling, and one blend file for rendering. In this case it a los makes sense todo properly name all the objects, thus making it easier when a specific element has todo be imported from a modeling file into the rendering scene. For further details, the supplied Blender file can be consulted, which contains the diferent steps separated th rouge layers.
Closing comentarios:
Very often the Blender 2.5 vs 2.4 cuestión is asked at the blenderartists forum. Blender 2.5 possesses, compared todo Blender 2.4, Many enhancements which significantly increase productivity. While a few tools from 2.4 are still missing the majority of new additions fully justify a switch todo the new architecture. This afects the cleaner interfaz, the new continuously growing add-on system, the more lógical workflow and eficiency posible with Blender 2.5, in particular can this be observed th rouge Blender being currently considered Even more as a host application for open source projects in the industry ranging from simple modeling tasks todo quite complex visualisation projects such as the blendme add-on, which connects Blender with the opens source products like openfoam and others.
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