GORT: Specifications Leon Kania – Haipin Cua – Thoren McDole – Chang Huang

Application  Educational tool and a programming utility for programmers who wants to visually design and build 3D objects. –Educational: A programmer can draw 3D objects, output the code, and be able to learn OpenGL by dissecting code. –Programming Utility: Facilitates visual design of 3D objects and their environment. A programmer may output working code and modify it to suit his/her purposes.

Requirements: Functional  File Management –New, Open, Save, Save As  Edit Capabilities –Cut, Copy, Paste, Delete, Select, Select Inverse, Undo, Redo, Group, Ungroup  View Capabilities –Zoom In/Out, Orthogonal View, Pan, Free Rotate  Transform Capabilities –Affine transformations and perspective transformations  Scale, Rotate, Translate, Shear

Requirements: Functional  Draw Primitives –Box, Sphere, Cone, Cylinder, Pyramid, Plane  Compose Primitives –Union, Intersection, Subtraction  Add Material –Color, Reflective Properties (interaction with environment), opacity.  Export file –OpenGL

Composition Mechanism

Requirements: Non-Functional  Program for Unix environment  C/C++, GTK+2.0, OpenGL, XML, gtkGL extensions, STL  Extensible –Underlying code is going to be designed to be simple and organic.  Portable –OpenGL centric but underlying classes are going to be designed so that other graphics API can be easily accommodated.

Requirements: Non-Functional  Implicit and Parametric Definitions.

Screen Shot

Use Cases

Detailed Use Case

Scenario  Draw Primitive –User selects box primitive –User specifies a center point in space by clicking on one of the view ports. The unspecified axis defaults to zero. –User drags to change initial scale.  Initial scale is the distance between the initial click and the unclick. –Object is now drawn. –User copies and paste box primitive in the exact same location. –User translates the pasted box object by x number of units upward. –User applies a uniform scale reducing the size of the pasted box. –User subtracts the pasted box from the original box.

Scenario

Future Extensions  Export to other formats. –3D Studio Max, Corel, Jpeg, GIF, Bitmaps, etc.  More Objects –Geo-sphere, Capsule, Disc, Torus, Tea-pot, Spirals, Text, 2D Objects, NGons, Curves, etc.  Advance Representations of Current Primitives –Bezier, NURBS, and other Splines.  Lights and Cameras

Future Extensions  Animation –Robotics, Shrek, etc.  Environmental Effects –Fog, Combustions, Reflections, etc.  Rendering Techniques –Ray Tracing  Multi-Threading –Simultaneous rendering by multiple machines. –Simultaneous editing by multiple artists.

Questions  Why did the chicken cross the road?