Design Computing

13. Advanced 3d Modeling & Rendering 2

11/28/2014CAD & Graphics II | HOM2027 | Fall 2014 | Every Friday 2:00 pm – 6:00 pm

Jin Kook Lee, PhD. 02-2220-2645 | designit@hanyang.ac.kr

Assistant Professor, Space & Design IT Lab.Department of Interior Architecture Design, Hanyang University

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Where we are

- Geometric modeling vs. BIM- Prep for the Final Project

- Nov 28: Midterm Exam

- Dec 5: Your Project Progress Report

- Dec 14: Final Project Dev.

- Dec 19: Final Project Presentation

What to do today

1. Lecture: Theoretical background of CAD & Graphics

2. Lab exercise 01: Autodesk Homestyler.com Design your room

Submit screen capture scene (2D), rendering image, 3d CAD (dwg) file

Test mobile version of Homestyler.com: Take a picture & decorate it

3. Lab exercise 02: 3ds Max “Freeform” design & render

Submit your freeform design based on given environment file

4. Lab Exercise 03: 3ds Max Mental Ray render tip – “Cutouts”

max file & render a scene

5. Requirements: All lab exercises outcome files should be submitted in “Shared Folder”

Appropriate *.max files &/or images in JPG format. Try to get your best!

Submit this week’s LE today & All missing Lab Exercises until November 25

6. Midterm Examination

High Level vs. Low Level

High LoD vs. Low LoD

High Level - Low Level

총론 總論Introduction, Outline, General Theory

Coarse Detail, High Level

각론 各論Detail, Particulars, Specific Theory

Fine Detail, Low Level

What’s the LoD we pursued in the class?

- Developing the capability of Design Computing

- Enhancing Digital Communication skills

- Practicing Digital Design Presentation

- Learning Interoperable operations between heterogeneous applications

- Exercising Adobe Photoshop & related 2d visualization tools

- Exercising SketchUP & related 3d visualization tools

- Training precision drawing tools such as AutoCAD

- Training skillful techniques on each tool: e.g. AutoCAD detail commands

High level

Low level

High LoD - Low LoD

http://makeitcg.com/wp-content/uploads/2013/08/lod-levels.jpghttp://www.sayantanbiswas.com/works/chn_Tower/LOD3.jpg

High Low

Review: 3d Modeling & Design Representation

Review – CAD history

The design is a drawing of the product e.g. Geometric drafting in 2D

The design is a surface model of the product e.g. Geometric surface modeling in 3D

The design is a 3D model of the product e.g. Solid modeling

The design is an editable 3D model of the product e.g. Parametric modeling

The design is the integrated representation of

all the compositional, analytical and fabrication

representations of the product

(Geometry is just one part of the model) e.g. Product Data Modeling, Building Information Modeling

H

W

D

Parameters:H, W, D

+ Information

Information Modeling

Surface Model

Surface modeling is good to “visualize” any type of 3d objects, not only

in the real world but also in the cyber spaces such as games.

However, we are dealing with real world objects – they are all solid 3d

objects. In terms of Semantic Integrity, what should we model?

What is a (3D) Solid Model

“A solid model is an unambiguous computer representation of a

physical solid object.”

Requicha & Rossignac (1992)

Non-solid 3D Model:

Klein’s Bottle

Why we need Solid Modeling?- Invalid and ambiguous 3D Representation

Devil’s Fork

invalid

ambiguous

Geometry and Topology

기하학 / 위상기하학

How to represent a shape

What information is necessary to represent (or reproduce) this shape as a computer model?

Geometry

values relative to the Cartesian coordinate

(2, 1)

(1, 2)

(2, 3)

(3, 2)

(2, 1)

(1, 2)

(2, 3)

(3, 2)

Points Lines

(2, 1)

(1, 2)

(2, 3)

(3, 2)

Surface

Topology

Topology defines relations

v1

v0

v3

v2

e1

e0 e3

e2

e0: v3 – v0e1: v0 – v1e2: v1 – v2e3: v2 – v3

f

f: e0-e1-e2-e3

Topology vs. Geometry

Different geometric shapes with the same topology

v1

v0

v3

v2 v0

v1v2

v3

v0 – v1– v2– v3– v0 v0 – v1– v2– v3– v0

Topology vs. Geometry

Different topological shapes with the same geometry

p1

p0

p3

p2

p1

p0

p3

p2

To represent a shape

Both geometry and topology are necessary.

Geometry defines values (locations) of points.

Topology defines relations between points.

(2, 1)

(1, 2)

(2, 3)

(2, 3)

v1

v0

v3

v2

Topology and Geometry Elements

Geometry Topology

Space Shell

Surface Face

Line Edge

Point Vertex

Problems of a unclosed surface

Defining a closed surface

v1

v0 – v1 – v2 – v3 – v0

v3

v2v0

v1

v2 – v3 – v0 – v1

v3

v2v0

This example does not create a loop.

v1

v3

v2

v0

Closed loop

Geometric Modeling vs. Information Modeling

Information Modeling for Building BIM

Information Modeling ⊃ geometric modeling

From 2D drafting to 3D modeling and what’s NEXT?

Plan: Top view

Plan: Front view Elevation

3D Axonometric (still 2D drawing)

3D Surface Model 3D Solid Model

2D Drafting 3D Modeling

Capturing some visualizations from the model:Rendering, Animation…

Review – CAD history

The design is a drawing of the product e.g. Geometric drafting in 2D

The design is a surface model of the product e.g. Geometric surface modeling in 3D

The design is a 3D model of the product e.g. Solid modeling

The design is an editable 3D model of the product e.g. Parametric modeling

The design is the integrated representation of

all the compositional, analytical and fabrication

representations of the product

(Geometry is just one part of the model) e.g. Product Data Modeling, Building Information Modeling

H

W

D

Parameters:H, W, D

+ Information

Information Modeling

Autodesk HomeStyler – www.homestyler.com

Autodesk HomeStyler – www.homestyler.com

Homestyler is a BIM tool, not a conventional CAD tool

Homestyler Mobile version: object-based design/decoration & camera-based edit

HomeStyler Model is

not a simple CAD

but a simple BIM

This is a “Door” object

Not a rectangle geometry

File – Save As:

JPG, DWG, RVT

AutoCAD DWG file

Object: “Polylines block”

Properties:

Color, Layer, Linetype,

Position X, Y, Z…

Revit RVT file

Object: “Double-Panel Door”

Properties:

Sill height, Frame Type, Material,

Finish, Head height…

Your Design & idea

http://en.wikipedia.org/wiki/Architectural_drawing

ABSTRACT추상화 (抽象化)

Programming: Bubble Diagram

Sketch

Drafting by hand

(1893)Architectural Symbols: Floor Plan,

etc.

Traditional Communication in AEC-FM industry

Let computers do this abstract, visualization, symbolization, etc.

AutoCAD

- This is a geometric line object

- Only geometric properties

- Computer does NOT know this is

a “Door”

- Only “drawing” & “visualization”

- Any CAD tools can draw this wall,

using Rhino, 3ds Max, SketchUP,

even by this PowerPoint

Let computers do what we have done for new buildings

Revit (BIM)

- This is a door object

- Door related properties

- Computer does KNOW this is a

“Door”

- “drawing” & “visualization” are

one of uses of this model

- Only BIM authoring tools can

draw this “door”. Not by general

CAD tools for Jewelry, Textile,

Machine, etc.

Conventional Design Computing

Drafting

Modeling

Rendering

Animation

… Visualizations

Focusing on geometric shapes

Let computers do what we have drawn

New direction of Design Computing: Information Modeling

Focusing on information

Let computers do what we have done

Difference between geometric drawing and information modeling

Two representations

are very close.

Computationally,

very different.

So, what we need to know?

Vertex

(Point)

Edge

(Line)

Face

(Surface)

Shell

(Space)

Geometric Modeling

e.g. 3ds Max Design

Design

Parametric Modeling

e.g. Revit

Part

(Component,

Family, Object)

Design

(could be a part

of bigger design)

Geometry-centered, some parametrics

For editing: update vertex, edge, polygon

Object-oriented modeling & design

For editing: update information

Topology

(Geometry)

Lab Exercise 00: 3ds Max basic render environment

- Basic render environment file for Mental Ray- Basic render environment file for Vray

Use them for your “precision” modeling & quick rendering preview

Environment_MentalRay.max

1,000mm

1,000mm

Lab Exercise 01: Autodesk HomeStyler.com

- A web-based parametric modeling tool (& Mobile-based)

- Login using Google Account, and design your room

Autodesk HomeStyler – www.homestyler.com

Autodesk HomeStyler – www.homestyler.com

Lab Exercise 03: Freeform Tools in 3ds Max

- Primitive – Editable Poly – Freeform

- Edit Poly – Inset – Shell – MeshSmooth, TurboSmooth, etc.

Box primitive

Or any others

- Turn on Edged Faces

- Use real scale: e.g. 6mX6mX5m

- Turn on Total Polys (hit 7)

Freeform: similar to FFD,

Editable Poly, Noise, etc.

Editing Polys

in Edit Poly mode

Editing Polys

in Edit Poly mode

Box to a

freeform object

- Edit Poly (or Convert Editable Poly)

- Select Polygons & Freeform

- Inset Polys

- Delete Polys

Shell to create

3d object

Turbosmooth or

Meshsmooth

Iteration & other options

Quick Render using Environment_MentalRay.max

Lab Exercise 04: MR Mapping in 3ds Max

- Pattern and curve using MR mapping & Shaders, without geometry

A Plane object

+ MR Cutout map

A Plane object

+ MR Cutout map

Main Maps

- Diffuse

- Reflection, Refraction

Special Purpose Maps

- Bump

- Displacement

- Cutout

Diffuse map (bitmap)

No Reflection: black

100% Reflection: white

Adjust Size

Turn on the view

Rotate, if needed

Update image

You can drag & drop

to copy exactly same

size and angle you

adjusted for the diffuse

Diffuse Mapping

(Checker)

+ Displacement (10)

+ Cutout

(black color)

Copper plate

(Autodesk Metal)

Copper plate +

Cutouts

Text on a Plane

(inverted B/W)

- Diffuse map

- Displacement

- Cutout

- Diffuse map

- Displacement

- Diffuse color

- Reflection

- Displacement

- Cutout

Visualize your pattern or design only by MR maps

Midterm Exam

Next Class

Animation

Final Project Development